import { act, fireEvent, render, screen, waitFor } from "@testing-library/react";
import { useState } from "react";
import { describe, expect, it, vi } from "vitest";

import { DIProvider } from "@/app/di";
import type { AgentProfile } from "@/domain";
import { PluginRuntimeProvider } from "@/features/plugins";
import {
  PluginCommandRegistry,
  PluginLayoutRegistry,
  PluginMenuRegistry,
  PluginRuntimeRegistry,
} from "@/plugins/runtime";
import type { Gateways } from "@/ports";
import { CustomAgentChatView } from "./CustomAgentChatView";

const profile: AgentProfile = {
  id: "structured",
  name: "Structured Codex",
  command: "codex",
  args: [],
  contextInjection: { strategy: "conventionFile", target: "AGENTS.md" },
  detect: null,
  cwdTemplate: "{projectRoot}",
  structuredAdapter: "codex",
};

function addPluginCommand(
  registry: PluginRuntimeRegistry,
  pluginId: string,
  commandId: string,
  handler: (...args: unknown[]) => unknown | Promise<unknown>,
) {
  const commands = new PluginCommandRegistry(pluginId, new Set([commandId]));
  commands.register(commandId, handler);
  registry.add({
    pluginId,
    displayName: "Acme Plugin",
    contributes: {
      menus: [],
      menuItems: [],
      slashCommands: [
        {
          name: "/explain",
          shortDescription: "Explain selection",
          command: commandId,
        },
      ],
      layouts: [],
      mcpServers: [],
    },
    commands,
    layouts: new PluginLayoutRegistry(pluginId, new Set()),
    menu: new PluginMenuRegistry(pluginId),
    dispose: async () => {},
  });
}

describe("CustomAgentChatView", () => {
  it("cancels only the current turn and keeps the structured session alive", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "first turn" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() =>
      expect(agent.sendAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        "first turn",
        expect.any(Function),
      ),
    );
    expect(screen.queryByRole("button", { name: "Cancel" })).toBeNull();

    fireEvent.click(await screen.findByRole("button", { name: "Stop" }));

    await waitFor(() =>
      expect(agent.cancelAgentChat).toHaveBeenCalledWith("chat-session-1"),
    );
    expect(agent.closeAgentChat).not.toHaveBeenCalled();
    expect(onSessionId).not.toHaveBeenCalledWith(null);
    expect(screen.getByText("Tour interrompu.")).toBeTruthy();

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "second turn" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(2));
    expect(agent.sendAgentChat).toHaveBeenLastCalledWith(
      "chat-session-1",
      "second turn",
      expect.any(Function),
    );
  });

  it("falls back to a fresh launch when reattach reports NOT_FOUND", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi
        .fn()
        .mockRejectedValueOnce({ code: "NOT_FOUND", message: "structured session gone" })
        .mockImplementationOnce(async (sessionId: string) => ({
          sessionId,
          scrollback: [],
        })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="stale-session"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.launchAgentChat).toHaveBeenCalledWith("project-1", "agent-1", {
        cwd: "/repo",
        rows: 24,
        cols: 80,
        conversationId: "conversation-1",
        nodeId: "node-1",
      }),
    );
    await waitFor(() =>
      expect(onSessionId).toHaveBeenCalledWith("chat-session-2"),
    );
    expect(screen.queryByText(/structured session gone/)).toBeNull();
  });

  it("does not duplicate the user prompt when the stream echoes it back", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async (_sessionId: string, _prompt: string, onChunk) => {
        onChunk({ kind: "userPrompt", text: "hello agent" });
        onChunk({ kind: "final", content: "done" });
      }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "hello agent" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await screen.findByText("done");
    expect(screen.getAllByText("hello agent")).toHaveLength(1);
    expect(screen.getByText("Terminé").parentElement?.parentElement?.className).toContain(
      "justify-end",
    );
  });

  it("renders canonical progress chunks as live agent, MCP, and delegation activity", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async (_sessionId: string, _prompt: string, onChunk) => {
        onChunk({
          kind: "progress",
          progress: {
            source: "providerNative",
            kind: "turn",
            stage: "started",
            label: "turn.started",
            provider: "codex",
            nativeEvent: "turn.started",
          },
        });
        onChunk({
          kind: "progress",
          progress: {
            source: "providerNative",
            kind: "message",
            stage: "delta",
            label: "Analyse",
            text: "Lecture du contexte disponible.",
            provider: "codex",
            nativeEvent: "agent.message.delta",
          },
        });
        onChunk({
          kind: "progress",
          progress: {
            source: "ideaLocal",
            kind: "mcp",
            stage: "started",
            label: "idea_ticket_read",
            toolName: "idea_ticket_read",
          },
        });
        onChunk({
          kind: "progress",
          progress: {
            source: "ideaLocal",
            kind: "mcp",
            stage: "started",
            label: "idea_ask_agent",
            text: "target=QA task=Valider le rendu progress",
            toolName: "idea_ask_agent",
          },
        });
        onChunk({
          kind: "progress",
          progress: {
            source: "providerNative",
            kind: "turn",
            stage: "completed",
            label: "turn.completed",
            provider: "codex",
            nativeEvent: "turn.completed",
          },
        });
        onChunk({ kind: "final", content: "done" });
      }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "ship progress UI" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await screen.findByText("Progress");
    expect(screen.getAllByTestId("chat-turn-marker")).toHaveLength(2);
    expect(screen.getByText("turn.started")).toBeTruthy();
    expect(screen.getByText("turn.completed")).toBeTruthy();
    expect(screen.getByText("Progress").closest("[data-testid='chat-progress-status']")).toBeTruthy();
    expect(screen.getByText("Analyse")).toBeTruthy();
    expect(screen.getByText("Lecture du contexte disponible.")).toBeTruthy();
    expect(screen.getByText("MCP")).toBeTruthy();
    expect(screen.getByText("MCP").closest("[data-testid='chat-tool-progress']")).toBeTruthy();
    expect(screen.getByText("idea_ticket_read")).toBeTruthy();
    expect(screen.getByText("Worker ← QA")).toBeTruthy();
    expect(screen.getByText("Worker ← QA").closest("[data-testid='chat-tool-progress']")).toBeTruthy();
    expect(screen.getByText("Valider le rendu progress")).toBeTruthy();
    expect((await screen.findAllByText("done")).length).toBeGreaterThan(0);
  });

  it("renders available pre-MCP progress before the first MCP card", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    const { container } = render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "delegate after intent" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    act(() => {
      emitChunk?.({
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "message",
          stage: "delta",
          label: "Intention",
          text: "Je vais d'abord regarder les outils MCP disponibles.",
          provider: "codex",
          nativeEvent: "agent.message.delta",
        },
      });
    });

    expect(
      screen.getByText("Je vais d'abord regarder les outils MCP disponibles."),
    ).toBeTruthy();
    expect(screen.queryByText("idea_ask_agent")).toBeNull();

    act(() => {
      emitChunk?.({
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "started",
          label: "idea_ask_agent",
          toolName: "idea_ask_agent",
        },
      });
    });

    const intent = screen.getByText(
      "Je vais d'abord regarder les outils MCP disponibles.",
    );
    const delegation = screen.getByText("idea_ask_agent");
    expect(
      Boolean(intent.compareDocumentPosition(delegation) & Node.DOCUMENT_POSITION_FOLLOWING),
    ).toBe(true);

    act(() => {
      emitChunk?.({ kind: "final", content: "done" });
    });
    await screen.findByText("done");
    expect(container.textContent).toContain("Je vais d'abord regarder");
  });

  it("deduplicates delegated tool progress from tap and authoritative stream", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "delegate once" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    const progress = (source: "providerNative" | "ideaLocal", stage: "started" | "completed") => ({
      kind: "progress" as const,
      progress: {
        source,
        kind: source === "ideaLocal" ? ("mcp" as const) : ("tool" as const),
        stage,
        label: "idea_ask_agent",
        text: stage === "started" ? "target=QA task=validate" : "reply delivered",
        provider: source === "providerNative" ? "opencode" : undefined,
        nativeEvent:
          source === "providerNative"
            ? stage === "started"
              ? "tool_use"
              : "tool_done"
            : stage === "started"
              ? "conversation.item.added"
              : "conversation.item.done",
        toolName: "idea_ask_agent",
      },
    });

    act(() => {
      emitChunk?.(progress("providerNative", "started"));
      emitChunk?.(progress("ideaLocal", "started"));
    });

    expect(screen.getByText("Worker → QA")).toBeTruthy();
    expect(screen.getByText("Worker → QA").parentElement?.textContent).toContain("started");
    expect(screen.getAllByRole("status", { name: "Loading" }).length).toBeGreaterThan(0);

    act(() => {
      emitChunk?.(progress("providerNative", "completed"));
      emitChunk?.(progress("ideaLocal", "completed"));
      emitChunk?.(progress("providerNative", "started"));
      emitChunk?.(progress("ideaLocal", "started"));
      emitChunk?.(progress("providerNative", "completed"));
      emitChunk?.(progress("ideaLocal", "completed"));
      emitChunk?.({ kind: "final", content: "done" });
    });

    await screen.findByText("done");
    expect(screen.getAllByText("Worker ← QA")).toHaveLength(2);
    expect(screen.getAllByText("validate")).toHaveLength(2);
    expect(screen.queryByText("Appel inter-agent")).toBeNull();
    expect(screen.queryByText("reply delivered")).toBeNull();
    expect(screen.queryByText("Tool")).toBeNull();
    expect(screen.queryByText("started")).toBeNull();
    await waitFor(() =>
      expect(screen.queryByRole("status", { name: "Loading" })).toBeNull(),
    );
  });

  it("stops animating running progress rows once the turn reaches a final chunk", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "ship progress UI" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    act(() => {
      emitChunk?.({
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "message",
          stage: "delta",
          label: "Analyse",
          text: "Lecture du contexte disponible.",
        },
      });
    });

    expect(screen.getAllByRole("status", { name: "Loading" }).length).toBeGreaterThan(0);
    expect(screen.getByText("Progress").parentElement?.textContent).toContain("running");

    act(() => {
      emitChunk?.({ kind: "final", content: "done" });
    });

    await screen.findByText("done");
    await waitFor(() =>
      expect(screen.queryByRole("status", { name: "Loading" })).toBeNull(),
    );
    expect(screen.getByText("Lecture du contexte disponible.")).toBeTruthy();
    expect(screen.getByText("Progress").parentElement?.textContent).toContain("done");
  });

  it("does not append late progress chunks after the final answer", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "ship ordered stream" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    act(() => {
      emitChunk?.({ kind: "final", content: "done" });
    });
    await screen.findByText("done");

    act(() => {
      emitChunk?.({
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "started",
          label: "idea_ticket_read",
          toolName: "idea_ticket_read",
        },
      });
    });

    expect(screen.queryByText("idea_ticket_read")).toBeNull();
  });

  it("shows slash-command suggestions from the gateway, filters by prefix, and inserts the selected command", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      listSlashCommands: vi.fn(async (prefix?: string) =>
        [
          {
            name: "/clean",
            shortDescription: "Nettoyer la conversation courante",
            requiresConfirmation: false,
            availability: { status: "available" as const },
            source: "native" as const,
            native: "clean" as const,
          },
          {
            name: "/commit",
            shortDescription: "Préparer un commit",
            requiresConfirmation: true,
            availability: { status: "available" as const },
            source: { plugin: { pluginId: "git" } },
          },
        ].filter((command) => !prefix || command.name.startsWith(prefix)),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/c" } });

    const menu = await screen.findByRole("listbox", {
      name: "suggestions commandes slash",
    });
    expect(agent.listSlashCommands).toHaveBeenLastCalledWith("/c");
    expect(screen.getByRole("option", { name: /\/clean/ })).toBeTruthy();
    expect(screen.getByRole("option", { name: /\/commit/ })).toBeTruthy();

    fireEvent.keyDown(composer, { key: "ArrowDown" });
    fireEvent.keyDown(composer, { key: "Enter" });

    await waitFor(() => expect(composer.value).toBe("/commit "));
    expect(menu).toBeTruthy();
    expect(screen.queryByRole("listbox", { name: "suggestions commandes slash" })).toBeNull();
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
  });

  it("only opens slash-command suggestions at the start of an unfinished slash token", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      listSlashCommands: vi.fn(async () => [
        {
          name: "/clean",
          shortDescription: "Nettoyer la conversation courante",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: "native" as const,
          native: "clean" as const,
        },
      ]),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "hello /c" } });
    expect(screen.queryByRole("listbox", { name: "suggestions commandes slash" })).toBeNull();
    expect(agent.listSlashCommands).not.toHaveBeenCalled();

    fireEvent.change(composer, { target: { value: "/" } });
    await screen.findByRole("listbox", { name: "suggestions commandes slash" });

    fireEvent.change(composer, { target: { value: "/clean now" } });
    expect(screen.queryByRole("listbox", { name: "suggestions commandes slash" })).toBeNull();
  });

  it("dispatches plugin slash-command callback effects through the plugin runtime", async () => {
    const commandHandler = vi.fn(async () => {});
    const registry = new PluginRuntimeRegistry();
    addPluginCommand(
      registry,
      "dev.acme.explain",
      "dev.acme.explain.run",
      commandHandler,
    );
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async (_name: string, options) => ({
        command: {
          name: "/explain",
          shortDescription: "Explain selection",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: { plugin: { pluginId: "dev.acme.explain" } },
          plugin: {
            pluginId: "dev.acme.explain",
            commandId: "dev.acme.explain.run",
          },
        },
        effect: {
          kind: "pluginCallback" as const,
          pluginId: "dev.acme.explain",
          commandId: "dev.acme.explain.run",
          sessionId: options.sessionId,
          arguments: options.arguments ?? [],
        },
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <PluginRuntimeProvider
          value={{ registry, failures: [], pending: [], loading: false }}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </PluginRuntimeProvider>
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/explain focus this" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    await waitFor(() =>
      expect(agent.executeSlashCommand).toHaveBeenCalledWith("/explain", {
        sessionId: "chat-session-1",
        arguments: ["focus this"],
      }),
    );
    await waitFor(() => expect(commandHandler).toHaveBeenCalledWith("focus this"));
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
    expect(
      await screen.findByText("Commande plugin /explain exécutée."),
    ).toBeTruthy();
    expect(composer.value).toBe("");
  });

  it("executes /clean as a native conversation clear effect", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [{ kind: "userPrompt", text: "old conversation" }],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async () => ({
        command: {
          name: "/clean",
          shortDescription: "Nettoyer la conversation courante",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: "native" as const,
          native: "clean" as const,
        },
        effect: {
          kind: "cleanConversation" as const,
          sessionId: "chat-session-1",
          clearedChunks: 1,
        },
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect(await screen.findByText("old conversation")).toBeTruthy();

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/clean" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    await waitFor(() =>
      expect(agent.executeSlashCommand).toHaveBeenCalledWith("/clean", {
        sessionId: "chat-session-1",
      }),
    );
    await waitFor(() => expect(screen.queryByText("old conversation")).toBeNull());
    expect(screen.queryByRole("alert")).toBeNull();
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
    expect(composer.value).toBe("");
  });

  it("executes /help as a native help effect", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async () => ({
        command: {
          name: "/help",
          shortDescription: "Afficher les commandes disponibles",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: "native" as const,
          native: "help" as const,
        },
        effect: {
          kind: "help" as const,
          commands: [
            {
              name: "/help",
              shortDescription: "Afficher les commandes disponibles",
              requiresConfirmation: false,
              availability: { status: "available" as const },
              source: "native" as const,
              native: "help" as const,
            },
            {
              name: "/clean",
              shortDescription: "Nettoyer la conversation courante",
              requiresConfirmation: false,
              availability: { status: "available" as const },
              source: "native" as const,
              native: "clean" as const,
            },
            {
              name: "/profile",
              shortDescription: "Changer le profil de l'agent",
              requiresConfirmation: true,
              availability: { status: "available" as const },
              source: "native" as const,
              native: "profile" as const,
            },
          ],
        },
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/help" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    await waitFor(() =>
      expect(agent.executeSlashCommand).toHaveBeenCalledWith("/help", {
        sessionId: "chat-session-1",
      }),
    );
    expect(
      await screen.findByText(/\/clean - Nettoyer la conversation courante/),
    ).toBeTruthy();
    expect(screen.queryByRole("alert")).toBeNull();
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
    expect(composer.value).toBe("");
  });

  it("shows feedback when a plugin slash-command callback cannot be dispatched", async () => {
    const registry = new PluginRuntimeRegistry();
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async () => ({
        command: {
          name: "/explain",
          shortDescription: "Explain selection",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: { plugin: { pluginId: "dev.acme.missing" } },
          plugin: {
            pluginId: "dev.acme.missing",
            commandId: "dev.acme.missing.run",
          },
        },
        effect: {
          kind: "pluginCallback" as const,
          pluginId: "dev.acme.missing",
          commandId: "dev.acme.missing.run",
          arguments: [],
        },
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <PluginRuntimeProvider
          value={{ registry, failures: [], pending: [], loading: false }}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </PluginRuntimeProvider>
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/);
    fireEvent.change(composer, { target: { value: "/explain" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    const alert = await screen.findByRole("alert");
    expect(alert.textContent).toContain("Commande /explain échouée");
    expect(alert.textContent).toContain('plugin "dev.acme.missing" is not loaded');
    expect(screen.getAllByText(/Commande \/explain échouée/)).toHaveLength(2);
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
  });

  it("executes /profile as a confirmed profile-switch flow that resets the current session", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        cellKind: "chat" as const,
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async () => ({
        command: {
          name: "/profile",
          shortDescription: "Changer le profil de l'agent",
          requiresConfirmation: true,
          availability: { status: "available" as const },
          source: "native" as const,
          native: "profile" as const,
        },
        effect: {
          kind: "profileSwitch" as const,
          sessionId: "chat-session-1",
        },
      })),
      changeAgentProfile: vi.fn(async () => ({ agent: { id: "agent-1" } })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const profileGateway = {
      listProfiles: vi.fn(async () => [
        profile,
        {
          ...profile,
          id: "codex-high",
          name: "Codex High",
        },
      ]),
    };
    const onSessionId = vi.fn();
    const onConversationId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          profile: profileGateway,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={onConversationId}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/profile" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    const dialog = await screen.findByRole("dialog", { name: "Changer de profil" });
    expect(dialog.textContent).toContain("réinitialiser la session courante");
    expect(dialog.textContent).toContain("L'historique de cette CLI custom sera perdu");
    expect(agent.executeSlashCommand).toHaveBeenCalledWith("/profile", {
      sessionId: "chat-session-1",
    });
    expect(agent.sendAgentChat).not.toHaveBeenCalled();

    const confirmButton = screen.getByRole("button", {
      name: "Reset et changer le profil",
    }) as HTMLButtonElement;
    expect(confirmButton.disabled).toBe(true);

    fireEvent.change(screen.getByLabelText("profil cible"), {
      target: { value: "codex-high" },
    });
    fireEvent.click(screen.getByLabelText("Je confirme que la session courante sera reset."));
    expect(confirmButton.disabled).toBe(false);
    fireEvent.click(confirmButton);

    await waitFor(() =>
      expect(agent.changeAgentProfile).toHaveBeenCalledWith(
        "project-1",
        "agent-1",
        "codex-high",
        24,
        80,
      ),
    );
    await waitFor(() =>
      expect(agent.launchAgentChat).toHaveBeenCalledWith("project-1", "agent-1", {
        cwd: "/repo",
        rows: 24,
        cols: 80,
        conversationId: undefined,
        nodeId: "node-1",
      }),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onConversationId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("chat-session-2");
    expect(onConversationId).toHaveBeenCalledWith("conversation-2");
    expect(screen.getByText("Profil changé vers Codex High.")).toBeTruthy();
    expect(screen.queryByRole("dialog", { name: "Changer de profil" })).toBeNull();
  });

  it("pastes a clipboard image as a removable preview chip", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const file = new File(["ignored"], "clipboard.png", { type: "image/png" });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([1, 2, 3]).buffer),
    });
    fireEvent.paste(screen.getByLabelText(/message CLI custom/), {
      clipboardData: {
        items: [
          {
            kind: "file",
            type: "image/png",
            getAsFile: () => file,
          },
        ],
        getData: () => "",
      },
    });

    expect(await screen.findByText("Fichier joint: clipboard.png")).toBeTruthy();
    expect(screen.getByTestId("attachment-preview-clipboard.png")).toBeTruthy();

    fireEvent.click(screen.getByRole("button", { name: "retirer clipboard.png" }));

    await waitFor(() =>
      expect(screen.queryByText("Fichier joint: clipboard.png")).toBeNull(),
    );
    expect(
      (screen.getByRole("button", { name: "Envoyer" }) as HTMLButtonElement)
        .disabled,
    ).toBe(true);
  });

  it("sends a pasted clipboard image without requiring text", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const file = new File(["ignored"], "paste-image.png", { type: "image/png" });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([1, 2, 3]).buffer),
    });
    fireEvent.paste(screen.getByLabelText(/message CLI custom/), {
      clipboardData: {
        items: [
          {
            kind: "file",
            type: "image/png",
            getAsFile: () => file,
          },
        ],
        getData: () => "",
      },
    });

    await screen.findByText("Fichier joint: paste-image.png");
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(1));
    expect(agent.sendAgentChat).toHaveBeenCalledWith(
      "chat-session-1",
      "",
      expect.any(Function),
      {
        attachments: [
          {
            filename: "paste-image.png",
            contentBase64: "AQID",
            mime: "image/png",
            sourceKind: "clipboard",
          },
        ],
      },
    );
    expect(screen.getByText("Pièce jointe")).toBeTruthy();
    expect(screen.getByText("Fichier: paste-image.png")).toBeTruthy();
  });

  it("accepts pasted generic files exposed only through clipboardData.files", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const file = new File(["ignored"], "files-only.pdf", { type: "application/pdf" });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([4, 5, 6]).buffer),
    });
    fireEvent.paste(screen.getByLabelText(/message CLI custom/), {
      clipboardData: {
        items: [],
        files: [file],
        getData: () => "",
      },
    });

    await screen.findByText("Fichier joint: files-only.pdf");
    expect(screen.queryByTestId("attachment-preview-files-only.pdf")).toBeNull();
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(1));
    expect(agent.sendAgentChat).toHaveBeenCalledWith(
      "chat-session-1",
      "",
      expect.any(Function),
      {
        attachments: [
          {
            filename: "files-only.pdf",
            contentBase64: "BAUG",
            mime: "application/pdf",
            sourceKind: "clipboard",
          },
        ],
      },
    );
  });

  it("keeps the chat shell bounded with a scrollable message area and fixed composer", async () => {
    const agent = {
      launchAgentChat: vi.fn(() => new Promise<never>(() => {})),
      reattachAgentChat: vi.fn(),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker with a very long name that must not collide with controls"
          profile={{
            ...profile,
            name: "Structured profile with a very long display name",
          }}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    const shell = screen.getByTestId("custom-agent-chat-view");
    const toolbar = await screen.findByRole("toolbar", {
      name: "custom agent chat actions",
    });
    const scroll = screen.getByTestId("custom-agent-chat-scroll");
    const composer = screen.getByTestId("custom-agent-chat-composer");

    expect(shell.className).toContain("h-full");
    expect(shell.className).toContain("min-h-0");
    expect(shell.className).toContain("overflow-hidden");
    expect(toolbar.className).toContain("overflow-hidden");
    expect(screen.queryByRole("button", { name: "Cancel" })).toBeNull();
    expect(scroll.className).toContain("flex-1");
    expect(scroll.className).toContain("basis-0");
    expect(scroll.className).toContain("overflow-y-auto");
    expect(composer.className).toContain("shrink-0");
  });

  it("falls back when Tauri surfaces structured session NOT_FOUND as a raw string", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi
        .fn()
        .mockRejectedValueOnce(
          "not found: structured session 69b57638-0ac7-4a79-8252-e0436a3265f6",
        )
        .mockImplementationOnce(async (sessionId: string) => ({
          sessionId,
          scrollback: [],
        })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="69b57638-0ac7-4a79-8252-e0436a3265f6"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() => expect(agent.launchAgentChat).toHaveBeenCalledTimes(1));
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      1,
      "69b57638-0ac7-4a79-8252-e0436a3265f6",
      expect.any(Function),
    );
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      2,
      "chat-session-2",
      expect.any(Function),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("chat-session-2");
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("does not reopen when the parent echoes a launched session id", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-echo",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    function EchoingParent() {
      const [echoedSessionId, setEchoedSessionId] = useState<string | null>(null);
      return (
        <DIProvider
          gateways={{
            agent,
            system: { pickFile: vi.fn(async () => null) },
          } as unknown as Gateways}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId={echoedSessionId}
            conversationId="conversation-1"
            onSessionId={(nextSessionId) => {
              onSessionId(nextSessionId);
              setEchoedSessionId(nextSessionId);
            }}
            onConversationId={vi.fn()}
          />
        </DIProvider>
      );
    }

    render(<EchoingParent />);

    await waitFor(() =>
      expect(onSessionId).toHaveBeenCalledWith("chat-session-echo"),
    );
    await waitFor(() => expect(agent.launchAgentChat).toHaveBeenCalledTimes(1));
    await waitFor(() => expect(agent.reattachAgentChat).toHaveBeenCalledTimes(1));
    await new Promise((resolve) => setTimeout(resolve, 20));

    expect(agent.launchAgentChat).toHaveBeenCalledTimes(1);
    expect(agent.reattachAgentChat).toHaveBeenCalledTimes(1);
  });

  it("recovers and retries the prompt when send reports NOT_FOUND", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi
        .fn()
        .mockRejectedValueOnce({
          code: "NOT_FOUND",
          message: "not found: structured session stale-session",
        })
        .mockImplementationOnce(async (_sessionId: string, _prompt: string, onChunk) => {
          onChunk({ kind: "final", content: "Recovered reply" });
        }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="stale-session"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "stale-session",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "please recover" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(2));
    expect(agent.sendAgentChat).toHaveBeenNthCalledWith(
      1,
      "stale-session",
      "please recover",
      expect.any(Function),
    );
    expect(agent.sendAgentChat).toHaveBeenNthCalledWith(
      2,
      "chat-session-2",
      "please recover",
      expect.any(Function),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("chat-session-2");
    expect(await screen.findByText("Recovered reply")).toBeTruthy();
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("recovers and retries the prompt when send reports structured session NOT_FOUND as a raw string", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi
        .fn()
        .mockRejectedValueOnce("not found: structured session stale-session")
        .mockImplementationOnce(async (_sessionId: string, _prompt: string, onChunk) => {
          onChunk({ kind: "final", content: "Recovered reply" });
        }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="stale-session"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "stale-session",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "please recover" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(2));
    expect(agent.sendAgentChat).toHaveBeenNthCalledWith(
      2,
      "chat-session-2",
      "please recover",
      expect.any(Function),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("chat-session-2");
    expect(await screen.findByText("Recovered reply")).toBeTruthy();
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("treats NOT_FOUND during cancel as an already-gone session", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn().mockRejectedValueOnce({
        code: "NOT_FOUND",
        message: "not found: structured session gone-session",
      }),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="gone-session"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "gone-session",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "long turn" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalled());

    fireEvent.click(await screen.findByRole("button", { name: "Stop" }));

    expect(await screen.findByText("Session déjà fermée.")).toBeTruthy();
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(agent.closeAgentChat).not.toHaveBeenCalled();
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("does not swallow post-launch reattach errors", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "new-session",
        cellKind: "chat",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn().mockRejectedValueOnce({
        code: "PROCESS",
        message: "post-launch attach failed",
      }),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect((await screen.findByRole("alert")).textContent).toContain(
      "post-launch attach failed",
    );
  });

  it("does not publish a session id when custom launch is refused as PTY-routed", async () => {
    const agent = {
      launchAgentChat: vi.fn().mockRejectedValueOnce({
        code: "STRUCTURED_ROUTED_TO_PTY",
        message:
          "custom CLI launch for agent agent-1 in project project-1 returned cellKind=pty; expected chat. sessionId=pty-session-1; nodeId=node-1",
      }),
      reattachAgentChat: vi.fn(),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    const alert = await screen.findByRole("alert");
    expect(alert.textContent).toContain("cellKind=pty");
    expect(agent.launchAgentChat).toHaveBeenCalledTimes(1);
    expect(agent.reattachAgentChat).not.toHaveBeenCalled();
    expect(onSessionId).not.toHaveBeenCalled();
  });

  it("recovers when post-launch reattach reports NOT_FOUND", async () => {
    const agent = {
      launchAgentChat: vi
        .fn()
        .mockResolvedValueOnce({
          sessionId: "new-session-1",
          assignedConversationId: "conversation-2",
        })
        .mockResolvedValueOnce({
          sessionId: "new-session-2",
          assignedConversationId: "conversation-2",
        }),
      reattachAgentChat: vi
        .fn()
        .mockRejectedValueOnce({
          code: "NOT_FOUND",
          message: "not found: structured session new-session-1",
        })
        .mockImplementationOnce(async (sessionId: string) => ({
          sessionId,
          scrollback: [],
        })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() => expect(agent.launchAgentChat).toHaveBeenCalledTimes(2));
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      1,
      "new-session-1",
      expect.any(Function),
    );
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      2,
      "new-session-2",
      expect.any(Function),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("new-session-2");
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("surfaces non-NOT_FOUND reattach errors instead of launching a new session", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn().mockRejectedValueOnce({
        code: "PROCESS",
        message: "structured session failed to attach",
      }),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="existing-session"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect((await screen.findByRole("alert")).textContent).toContain(
      "structured session failed to attach",
    );
    expect(agent.launchAgentChat).not.toHaveBeenCalled();
  });
});