/**
 * Contract tests for `TauriAgentGateway`: they assert the exact `invoke()`
 * payload shape, which the mock gateway (used by feature tests) does NOT
 * exercise. This guards the class of "works in mock, broken in the real app"
 * bugs — e.g. forgetting to nest `projectId` inside the command's `request` DTO.
 */

import { describe, it, expect, vi, beforeEach } from "vitest";

const invoke = vi.fn();
vi.mock("@tauri-apps/api/core", () => ({
  invoke: (...args: unknown[]) => invoke(...args),
  Channel: class {
    onmessage: ((c: number[]) => void) | null = null;
  },
}));

import { TauriAgentGateway } from "./agent";

describe("TauriAgentGateway invoke payloads", () => {
  beforeEach(() => invoke.mockReset().mockResolvedValue({}));

  it("create_agent nests projectId inside the request DTO", async () => {
    await new TauriAgentGateway().createAgent("proj-1", {
      name: "Backend",
      profileId: "prof-9",
    });
    expect(invoke).toHaveBeenCalledWith("create_agent", {
      request: {
        projectId: "proj-1",
        name: "Backend",
        profileId: "prof-9",
        initialContent: null,
      },
    });
  });

  it("update_agent_context wraps fields in the request DTO", async () => {
    await new TauriAgentGateway().updateContext("proj-1", "agent-2", "# ctx");
    expect(invoke).toHaveBeenCalledWith("update_agent_context", {
      request: { projectId: "proj-1", agentId: "agent-2", content: "# ctx" },
    });
  });

  it("list_agents / read / delete pass top-level args and unwrap read context DTO", async () => {
    const gw = new TauriAgentGateway();
    await gw.listAgents("p");
    expect(invoke).toHaveBeenCalledWith("list_agents", { projectId: "p" });

    invoke.mockResolvedValueOnce({ content: "# context" });
    await expect(gw.readContext("p", "a")).resolves.toBe("# context");
    expect(invoke).toHaveBeenCalledWith("read_agent_context", {
      projectId: "p",
      agentId: "a",
    });

    await gw.deleteAgent("p", "a");
    expect(invoke).toHaveBeenCalledWith("delete_agent", {
      projectId: "p",
      agentId: "a",
    });
  });

  it("attach_live_agent wraps project, agent and target node in the request DTO", async () => {
    invoke.mockResolvedValueOnce({
      agentId: "agent-2",
      nodeId: "node-3",
      sessionId: "session-4",
      kind: "pty",
    });
    const out = await new TauriAgentGateway().attachLiveAgent(
      "proj-1",
      "agent-2",
      "node-3",
    );
    expect(invoke).toHaveBeenCalledWith("attach_live_agent", {
      request: { projectId: "proj-1", agentId: "agent-2", nodeId: "node-3" },
    });
    expect(out.sessionId).toBe("session-4");
  });

  it("stop_live_agent wraps project and agent in the request DTO", async () => {
    invoke.mockResolvedValueOnce({
      agentId: "agent-2",
      sessionId: "session-4",
      kind: "pty",
    });
    const out = await new TauriAgentGateway().stopLiveAgent("proj-1", "agent-2");
    expect(invoke).toHaveBeenCalledWith("stop_live_agent", {
      request: { projectId: "proj-1", agentId: "agent-2" },
    });
    expect(out.sessionId).toBe("session-4");
  });

  it("change_agent_profile wraps all five fields in the request DTO (camelCase)", async () => {
    invoke.mockResolvedValueOnce({ agent: { id: "agent-2" } });
    await new TauriAgentGateway().changeAgentProfile(
      "proj-1",
      "agent-2",
      "prof-9",
      30,
      120,
    );
    expect(invoke).toHaveBeenCalledWith("change_agent_profile", {
      request: {
        projectId: "proj-1",
        agentId: "agent-2",
        profileId: "prof-9",
        rows: 30,
        cols: 120,
      },
    });
  });

  it("change_agent_profile returns the mutated agent and the relaunched session", async () => {
    const response = {
      agent: { id: "agent-2", profileId: "prof-9" },
      relaunchedSession: { sessionId: "sess-7", cwd: "/p", rows: 30, cols: 120 },
    };
    invoke.mockResolvedValueOnce(response);
    const out = await new TauriAgentGateway().changeAgentProfile(
      "proj-1",
      "agent-2",
      "prof-9",
      30,
      120,
    );
    expect(out.agent.profileId).toBe("prof-9");
    expect(out.relaunchedSession?.sessionId).toBe("sess-7");
  });

  it("change_agent_profile leaves relaunchedSession undefined when the backend omits it", async () => {
    invoke.mockResolvedValueOnce({ agent: { id: "agent-2" } });
    const out = await new TauriAgentGateway().changeAgentProfile(
      "proj-1",
      "agent-2",
      "prof-9",
      30,
      120,
    );
    expect(out.relaunchedSession).toBeUndefined();
  });

  it("update_agent_effort wraps the nullable effort override in the request DTO", async () => {
    invoke.mockResolvedValueOnce({ id: "agent-2", effort: { kind: "preset", value: "high" } });
    await new TauriAgentGateway().updateAgentEffort("proj-1", "agent-2", {
      kind: "preset",
      value: "high",
    });
    expect(invoke).toHaveBeenCalledWith("update_agent_effort", {
      request: {
        projectId: "proj-1",
        agentId: "agent-2",
        effort: { kind: "preset", value: "high" },
      },
    });

    invoke.mockClear().mockResolvedValueOnce({ id: "agent-2" });
    await new TauriAgentGateway().updateAgentEffort("proj-1", "agent-2", null);
    expect(invoke).toHaveBeenCalledWith("update_agent_effort", {
      request: { projectId: "proj-1", agentId: "agent-2", effort: null },
    });
  });

  it("cancelAgentChat invokes cancel_agent_chat without closing the session", async () => {
    await new TauriAgentGateway().cancelAgentChat("chat-session-1");

    expect(invoke).toHaveBeenCalledWith("cancel_agent_chat", {
      sessionId: "chat-session-1",
    });
    expect(invoke).not.toHaveBeenCalledWith("close_agent_session", expect.anything());
  });

  it("sendAgentChat forwards structured clipboard attachments to agent_send", async () => {
    await new TauriAgentGateway().sendAgentChat(
      "chat-session-1",
      "",
      vi.fn(),
      {
        attachments: [
          {
            filename: "clipboard.png",
            contentBase64: "AQID",
            mime: "image/png",
            sourceKind: "clipboard",
          },
        ],
      },
    );

    expect(invoke).toHaveBeenCalledWith("agent_send", {
      sessionId: "chat-session-1",
      prompt: "",
      attachments: [
        {
          filename: "clipboard.png",
          contentBase64: "AQID",
          mime: "image/png",
          sourceKind: "clipboard",
        },
      ],
      onReply: expect.anything(),
    });
  });

  it("listSlashCommands forwards the unified slash-command filter request and unwraps commands", async () => {
    invoke.mockResolvedValueOnce({
      commands: [
        {
          name: "/clean",
          shortDescription: "Clean current conversation",
          requiresConfirmation: false,
          availability: { status: "available" },
          source: "native",
          native: "clean",
        },
      ],
    });

    const out = await new TauriAgentGateway().listSlashCommands("/c");

    expect(invoke).toHaveBeenCalledWith("list_slash_commands", {
      request: { prefix: "/c" },
    });
    expect(out).toHaveLength(1);
    expect(out[0].name).toBe("/clean");
  });

  it("executeSlashCommand wraps the selected command and current session id", async () => {
    invoke.mockResolvedValueOnce({
      command: {
        name: "/clean",
        shortDescription: "Clean current conversation",
        requiresConfirmation: false,
        availability: { status: "available" },
        source: "native",
        native: "clean",
      },
      effect: {
        kind: "cleanConversation",
        sessionId: "chat-session-1",
        clearedChunks: 2,
      },
    });

    const out = await new TauriAgentGateway().executeSlashCommand("/clean", {
      sessionId: "chat-session-1",
    });

    expect(invoke).toHaveBeenCalledWith("execute_slash_command", {
      request: { name: "/clean", sessionId: "chat-session-1" },
    });
    expect(out.effect.kind).toBe("cleanConversation");
  });

  it("launchAgentChat returns a handle only when launch_agent confirms cellKind chat", async () => {
    invoke.mockResolvedValueOnce({
      sessionId: "chat-session-1",
      cwd: "/repo",
      rows: 24,
      cols: 80,
      cellKind: "chat",
      assignedConversationId: "conversation-1",
    });

    const out = await new TauriAgentGateway().launchAgentChat("proj-1", "agent-2", {
      cwd: "/repo",
      rows: 24,
      cols: 80,
      conversationId: "conversation-0",
      nodeId: "node-3",
    });

    expect(invoke).toHaveBeenCalledWith("launch_agent", {
      request: {
        projectId: "proj-1",
        agentId: "agent-2",
        rows: 24,
        cols: 80,
        cellKind: "chat",
        conversationId: "conversation-0",
        nodeId: "node-3",
      },
      onOutput: expect.anything(),
    });
    expect(out).toEqual({
      sessionId: "chat-session-1",
      cellKind: "chat",
      assignedConversationId: "conversation-1",
    });
  });

  it("launchAgentChat rejects a PTY-routed launch before returning a fake structured session", async () => {
    const log = vi.spyOn(console, "error").mockImplementation(() => {});
    invoke.mockResolvedValueOnce({
      sessionId: "pty-session-1",
      cwd: "/repo",
      rows: 24,
      cols: 80,
      cellKind: "pty",
    });

    await expect(
      new TauriAgentGateway().launchAgentChat("proj-1", "agent-2", {
        cwd: "/repo",
        rows: 24,
        cols: 80,
        nodeId: "node-3",
      }),
    ).rejects.toEqual({
      code: "STRUCTURED_ROUTED_TO_PTY",
      message:
        "custom CLI launch for agent agent-2 in project proj-1 returned cellKind=pty; expected chat. sessionId=pty-session-1; nodeId=node-3",
    });
    expect(log).toHaveBeenCalledWith(
      "[ticket149] launchAgentChat:routed-to-non-chat",
      expect.objectContaining({
        projectId: "proj-1",
        agentId: "agent-2",
        response: expect.objectContaining({
          sessionId: "pty-session-1",
          cellKind: "pty",
        }),
      }),
    );
    log.mockRestore();
  });
});