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

import { DIProvider } from "@/app/di";
import {
  MockAgentGateway,
  MockSystemGateway,
  MockTicketGateway,
} from "@/adapters/mock";
import type { Agent } from "@/domain";
import type { Gateways } from "@/ports";
import { TicketsView } from "./TicketsView";
import { TicketDetail } from "./TicketDetail";

const PROJECT_ID = "project-tickets-test";

function stubClipboard() {
  const writeText = vi.fn().mockResolvedValue(undefined);
  Object.assign(navigator, { clipboard: { writeText } });
  return writeText;
}

async function seedAgent(agent: MockAgentGateway, name: string): Promise<Agent> {
  return agent.createAgent(PROJECT_ID, { name, profileId: "p-1" });
}

function renderView(
  ticket: MockTicketGateway,
  system: MockSystemGateway,
  agent: MockAgentGateway,
) {
  const gateways = { ticket, system, agent } as unknown as Gateways;
  return render(
    <DIProvider gateways={gateways}>
      <TicketsView projectId={PROJECT_ID} />
    </DIProvider>,
  );
}

describe("MockTicketGateway", () => {
  let system: MockSystemGateway;
  let ticket: MockTicketGateway;

  beforeEach(() => {
    system = new MockSystemGateway();
    ticket = new MockTicketGateway(system);
  });

  it("assigns sequential #refs and emits issueCreated", async () => {
    const events: string[] = [];
    await system.onDomainEvent((e) => events.push(e.type));

    const a = await ticket.create(PROJECT_ID, { title: "First" });
    const b = await ticket.create(PROJECT_ID, { title: "Second" });

    expect(a.ref).toBe("#1");
    expect(b.ref).toBe("#2");
    expect(b.version).toBe(1);
    expect(events).toContain("issueCreated");
  });

  it("filters by status and searches text", async () => {
    await ticket.create(PROJECT_ID, { title: "alpha bug", status: "open" });
    const t2 = await ticket.create(PROJECT_ID, { title: "beta task" });
    await ticket.update(PROJECT_ID, t2.ref, {
      status: "closed",
      expectedVersion: t2.version,
    });

    const open = await ticket.list(PROJECT_ID, { status: "open" });
    expect(open.items.map((i) => i.ref)).toEqual(["#1"]);

    const search = await ticket.list(PROJECT_ID, { text: "beta" });
    expect(search.items.map((i) => i.ref)).toEqual(["#2"]);
  });

  it("rejects a stale write with a version conflict", async () => {
    const t = await ticket.create(PROJECT_ID, { title: "x" });
    await ticket.update(PROJECT_ID, t.ref, {
      title: "y",
      expectedVersion: t.version,
    });

    await expect(
      ticket.update(PROJECT_ID, t.ref, {
        title: "z",
        expectedVersion: t.version, // stale (1, now 2)
      }),
    ).rejects.toMatchObject({ message: expect.stringContaining("version conflict") });
  });

  it("links and unlinks tickets, bumping the version", async () => {
    const a = await ticket.create(PROJECT_ID, { title: "a" });
    await ticket.create(PROJECT_ID, { title: "b" });
    const linked = await ticket.link(PROJECT_ID, a.ref, "#2", "blocks", a.version);
    expect(linked.links).toEqual([{ targetRef: "#2", kind: "blocks" }]);
    const unlinked = await ticket.unlink(
      PROJECT_ID,
      a.ref,
      "#2",
      linked.version,
      "blocks",
    );
    expect(unlinked.links).toEqual([]);
  });
});

describe("TicketsView", () => {
  let system: MockSystemGateway;
  let ticket: MockTicketGateway;
  let agent: MockAgentGateway;

  beforeEach(() => {
    system = new MockSystemGateway();
    ticket = new MockTicketGateway(system);
    agent = new MockAgentGateway();
  });

  it("shows the empty state then a created ticket", async () => {
    renderView(ticket, system, agent);
    expect(await screen.findByText("No tickets.")).toBeTruthy();

    await ticket.create(PROJECT_ID, { title: "Live created" });
    // The panel refreshes on the issueCreated event.
    expect(await screen.findByText("Live created")).toBeTruthy();
  });

  it("opens the detail and edits status with a version bump", async () => {
    const t = await ticket.create(PROJECT_ID, { title: "Editable" });
    renderView(ticket, system, agent);

    fireEvent.click(await screen.findByText("Editable"));
    const dialog = await screen.findByRole("dialog");

    const statusSelect = within(dialog).getByLabelText("ticket status");
    fireEvent.change(statusSelect, { target: { value: "inProgress" } });

    await waitFor(async () => {
      const fresh = await ticket.read(PROJECT_ID, t.ref);
      expect(fresh.status).toBe("inProgress");
      expect(fresh.version).toBe(2);
    });
  });

  it("saves the ticket-scoped carnet (replaceable)", async () => {
    const t = await ticket.create(PROJECT_ID, { title: "WithCarnet" });
    renderView(ticket, system, agent);

    fireEvent.click(await screen.findByText("WithCarnet"));
    const dialog = await screen.findByRole("dialog");

    fireEvent.change(within(dialog).getByLabelText("ticket carnet"), {
      target: { value: "## notes\nscoped body" },
    });
    fireEvent.click(within(dialog).getByText("Save carnet"));

    await waitFor(async () => {
      const carnet = await ticket.readCarnet(PROJECT_ID, t.ref);
      expect(carnet.carnet).toBe("## notes\nscoped body");
    });
  });

  it("assigns only known project agents", async () => {
    const known = await seedAgent(agent, "Backend");
    const t = await ticket.create(PROJECT_ID, { title: "Assignable" });
    renderView(ticket, system, agent);

    fireEvent.click(await screen.findByText("Assignable"));
    const dialog = await screen.findByRole("dialog");

    fireEvent.change(within(dialog).getByLabelText("assign agent"), {
      target: { value: known.id },
    });
    fireEvent.click(within(dialog).getByText("Assign"));

    await waitFor(async () => {
      const fresh = await ticket.read(PROJECT_ID, t.ref);
      expect(fresh.assignedAgentIds).toEqual([known.id]);
    });
    expect(within(dialog).getAllByText("Backend").length).toBeGreaterThan(0);
  });

  it("surfaces a version-conflict banner and reloads (F3)", async () => {
    // No system gateway ⇒ the detail does not auto-refresh on events, so we can
    // deterministically make its held version go stale under an external write.
    const t = await ticket.create(PROJECT_ID, { title: "Racy" });
    const gateways = { ticket, agent } as unknown as Gateways;
    render(
      <DIProvider gateways={gateways}>
        <TicketDetail
          projectId={PROJECT_ID}
          ticketRef={t.ref}
          onClose={() => {}}
          onOpenRef={() => {}}
        />
      </DIProvider>,
    );

    const dialog = await screen.findByRole("dialog");
    // The detail now holds version 1. Bump the store to version 2 behind its back.
    await ticket.update(PROJECT_ID, t.ref, {
      description: "external",
      expectedVersion: t.version,
    });

    fireEvent.change(within(dialog).getByLabelText("Title"), {
      target: { value: "Racy edited" },
    });
    fireEvent.click(within(dialog).getByText("Save changes"));

    expect(
      await within(dialog).findByText(/modified elsewhere and reloaded/i),
    ).toBeTruthy();
    // After the reload the detail field reflects the reloaded (title unchanged)
    // ticket rather than the abandoned local edit.
    await waitFor(() =>
      expect(
        (within(dialog).getByLabelText("Title") as HTMLInputElement)
          .value,
      ).toBe("Racy"),
    );
  });

  it("preserves an in-progress description edit across a priority change (#9)", async () => {
    const t = await ticket.create(PROJECT_ID, { title: "Persisted" });
    renderView(ticket, system, agent);

    fireEvent.click(await screen.findByText("Persisted"));
    const dialog = await screen.findByRole("dialog");

    // Start editing the description WITHOUT saving.
    const desc = within(dialog).getByLabelText("Description") as HTMLTextAreaElement;
    fireEvent.change(desc, { target: { value: "draft in progress" } });
    // Also edit the title to cover both draft fields.
    const titleInput = within(dialog).getByLabelText("Title") as HTMLInputElement;
    fireEvent.change(titleInput, { target: { value: "Persisted (wip)" } });

    // Change the priority — an immediate-apply mutation that re-fetches the ticket
    // and bumps its version. The unsaved draft must survive.
    fireEvent.change(within(dialog).getByLabelText("ticket priority"), {
      target: { value: "high" },
    });

    // The backend applied the priority bump…
    await waitFor(async () => {
      const fresh = await ticket.read(PROJECT_ID, t.ref);
      expect(fresh.priority).toBe("high");
      expect(fresh.version).toBe(2);
    });

    // …and the in-progress edits are still there (not reverted).
    expect(
      (within(dialog).getByLabelText("Description") as HTMLTextAreaElement).value,
    ).toBe("draft in progress");
    expect(
      (within(dialog).getByLabelText("Title") as HTMLInputElement).value,
    ).toBe("Persisted (wip)");
    // The description was never persisted.
    const persisted = await ticket.read(PROJECT_ID, t.ref);
    expect(persisted.description).toBe("");
  });

  it("prompts before closing with unsaved changes, and closes directly when clean (#9)", async () => {
    const t = await ticket.create(PROJECT_ID, { title: "CloseGuard" });
    const onClose = vi.fn();
    const gateways = { ticket, system, agent } as unknown as Gateways;
    render(
      <DIProvider gateways={gateways}>
        <TicketDetail
          projectId={PROJECT_ID}
          ticketRef={t.ref}
          onClose={onClose}
          onOpenRef={() => {}}
        />
      </DIProvider>,
    );

    const detail = await screen.findByRole("dialog", { name: `ticket ${t.ref}` });

    // Clean state → Close fires onClose directly, no confirmation dialog.
    fireEvent.click(within(detail).getByText("Close"));
    expect(onClose).toHaveBeenCalledTimes(1);
    expect(screen.queryByRole("dialog", { name: "unsaved changes" })).toBeNull();

    // Now make the draft dirty and try to close again.
    fireEvent.change(within(detail).getByLabelText("Description"), {
      target: { value: "unsaved body" },
    });
    fireEvent.click(within(detail).getByText("Close"));

    // The confirmation appears and onClose was NOT called again.
    const confirm = await screen.findByRole("dialog", { name: "unsaved changes" });
    expect(onClose).toHaveBeenCalledTimes(1);

    // "Annuler" dismisses the popup and keeps the editor open.
    fireEvent.click(within(confirm).getByLabelText("cancel close"));
    await waitFor(() =>
      expect(screen.queryByRole("dialog", { name: "unsaved changes" })).toBeNull(),
    );
    expect(onClose).toHaveBeenCalledTimes(1);

    // Re-open the confirmation and choose "Fermer sans sauvegarder".
    fireEvent.click(within(detail).getByText("Close"));
    const confirm2 = await screen.findByRole("dialog", { name: "unsaved changes" });
    fireEvent.click(within(confirm2).getByLabelText("close without saving"));
    expect(onClose).toHaveBeenCalledTimes(2);
    // The unsaved description was discarded (never persisted).
    const fresh = await ticket.read(PROJECT_ID, t.ref);
    expect(fresh.description).toBe("");
  });

  it("saves unsaved changes then closes when choosing « Sauvegarder » (#9)", async () => {
    const t = await ticket.create(PROJECT_ID, { title: "SaveOnClose" });
    const onClose = vi.fn();
    const gateways = { ticket, system, agent } as unknown as Gateways;
    render(
      <DIProvider gateways={gateways}>
        <TicketDetail
          projectId={PROJECT_ID}
          ticketRef={t.ref}
          onClose={onClose}
          onOpenRef={() => {}}
        />
      </DIProvider>,
    );

    const detail = await screen.findByRole("dialog", { name: `ticket ${t.ref}` });
    fireEvent.change(within(detail).getByLabelText("Description"), {
      target: { value: "final body" },
    });
    fireEvent.click(within(detail).getByText("Close"));

    const confirm = await screen.findByRole("dialog", { name: "unsaved changes" });
    fireEvent.click(within(confirm).getByLabelText("save and close"));

    // The change is persisted and the panel closes.
    await waitFor(async () => {
      const fresh = await ticket.read(PROJECT_ID, t.ref);
      expect(fresh.description).toBe("final body");
    });
    await waitFor(() => expect(onClose).toHaveBeenCalledTimes(1));
  });

  it("groups tickets by sprint with a « Sans sprint » bucket (#10)", async () => {
    // Two ordered sprints + one ticket in each + one loose ticket.
    ticket._seedSprint(PROJECT_ID, { id: "s1", order: 1, name: "Sprint One" });
    ticket._seedSprint(PROJECT_ID, { id: "s2", order: 2, name: "Sprint Two" });
    const t1 = await ticket.create(PROJECT_ID, { title: "In one" });
    const t2 = await ticket.create(PROJECT_ID, { title: "In two" });
    await ticket.create(PROJECT_ID, { title: "Loose" });
    await ticket.setTicketSprint(PROJECT_ID, t1.ref, "s1", t1.version);
    await ticket.setTicketSprint(PROJECT_ID, t2.ref, "s2", t2.version);

    renderView(ticket, system, agent);

    // Sections appear in sprint `order`, then the "Sans sprint" bucket last.
    await screen.findByRole("region", { name: "sprint section Sprint One" });
    const sections = screen
      .getAllByRole("region")
      .map((r) => r.getAttribute("aria-label"))
      .filter((l) => l?.startsWith("sprint section"));
    expect(sections).toEqual([
      "sprint section Sprint One",
      "sprint section Sprint Two",
      "sprint section Sans sprint",
    ]);

    // The loose ticket lives in the bucket, the others under their sprint.
    const bucket = screen.getByRole("region", { name: "sprint section Sans sprint" });
    expect(within(bucket).getByText("Loose")).toBeTruthy();
    const one = screen.getByRole("region", { name: "sprint section Sprint One" });
    expect(within(one).getByText("In one")).toBeTruthy();
  });

  it("assigns a ticket to a sprint via the row selector (#10)", async () => {
    ticket._seedSprint(PROJECT_ID, { id: "s1", order: 1, name: "Sprint One" });
    const t = await ticket.create(PROJECT_ID, { title: "Movable" });

    renderView(ticket, system, agent);

    // It starts in the "Sans sprint" bucket.
    const bucket = await screen.findByRole("region", {
      name: "sprint section Sans sprint",
    });
    expect(within(bucket).getByText("Movable")).toBeTruthy();

    // Pick the sprint in the row selector → assign it.
    fireEvent.change(screen.getByLabelText(`sprint for ${t.ref}`), {
      target: { value: "s1" },
    });

    // The gateway recorded the membership…
    await waitFor(async () => {
      const fresh = await ticket.read(PROJECT_ID, t.ref);
      expect(fresh.sprintId).toBe("s1");
    });
    // …and the UI regrouped it under Sprint One, emptying the bucket.
    await waitFor(() => {
      const one = screen.getByRole("region", {
        name: "sprint section Sprint One",
      });
      expect(within(one).getByText("Movable")).toBeTruthy();
    });
    expect(
      screen.queryByRole("region", { name: "sprint section Sans sprint" }),
    ).toBeNull();
  });

  it("copies a delegation context prompt (F7)", async () => {
    const writeText = stubClipboard();
    const t = await ticket.create(PROJECT_ID, { title: "Delegate me" });
    renderView(ticket, system, agent);

    fireEvent.click(await screen.findByText("Delegate me"));
    const dialog = await screen.findByRole("dialog");
    fireEvent.click(within(dialog).getByText("Delegation context"));

    await waitFor(() =>
      expect(writeText).toHaveBeenCalledWith(
        `Travaille sur le ticket ${t.ref} : Delegate me`,
      ),
    );
  });
});

describe("SprintManager (#11)", () => {
  let system: MockSystemGateway;
  let ticket: MockTicketGateway;
  let agent: MockAgentGateway;

  beforeEach(() => {
    system = new MockSystemGateway();
    ticket = new MockTicketGateway(system);
    agent = new MockAgentGateway();
  });

  /** Renders the view and opens the sprint-management overlay. */
  async function openManager(): Promise<HTMLElement> {
    renderView(ticket, system, agent);
    await waitFor(() =>
      expect(
        screen.getByRole("button", { name: "manage sprints" }),
      ).toBeTruthy(),
    );
    fireEvent.click(screen.getByRole("button", { name: "manage sprints" }));
    return screen.findByRole("dialog", { name: "manage sprints" });
  }

  it("creates a sprint", async () => {
    const dialog = await openManager();

    fireEvent.change(within(dialog).getByLabelText("new sprint name"), {
      target: { value: "Alpha" },
    });
    fireEvent.click(within(dialog).getByText("Create sprint"));

    await waitFor(async () => {
      const sprints = await ticket.listSprints(PROJECT_ID);
      expect(sprints.map((s) => s.name)).toEqual(["Alpha"]);
    });
    expect(
      await within(dialog).findByLabelText("sprint row Alpha"),
    ).toBeTruthy();
  });

  it("creates a sprint with a default positional name when the name is empty", async () => {
    const dialog = await openManager();

    // Leave the name field empty and create → default "Sprint N" (here N=1).
    expect(
      (within(dialog).getByLabelText("new sprint name") as HTMLInputElement)
        .value,
    ).toBe("");
    fireEvent.click(within(dialog).getByText("Create sprint"));

    await waitFor(async () => {
      const sprints = await ticket.listSprints(PROJECT_ID);
      expect(sprints.map((s) => s.name)).toEqual(["Sprint 1"]);
    });
    expect(
      await within(dialog).findByLabelText("sprint row Sprint 1"),
    ).toBeTruthy();
  });

  it("renames a sprint", async () => {
    ticket._seedSprint(PROJECT_ID, { id: "s1", order: 1, name: "Old" });
    const dialog = await openManager();

    fireEvent.change(
      await within(dialog).findByLabelText("rename sprint Old"),
      { target: { value: "New" } },
    );
    fireEvent.click(within(dialog).getByLabelText("save sprint Old"));

    await waitFor(async () => {
      const [s] = await ticket.listSprints(PROJECT_ID);
      expect(s.name).toBe("New");
    });
  });

  it("reorders sprints via the accessible down button", async () => {
    ticket._seedSprint(PROJECT_ID, { id: "s1", order: 1, name: "One" });
    ticket._seedSprint(PROJECT_ID, { id: "s2", order: 2, name: "Two" });
    const dialog = await openManager();

    fireEvent.click(
      await within(dialog).findByLabelText("move sprint One down"),
    );

    await waitFor(async () => {
      const sprints = await ticket.listSprints(PROJECT_ID);
      // "Two" is now first (order 1), "One" second.
      expect(sprints.map((s) => s.name)).toEqual(["Two", "One"]);
    });
  });

  it("deletes a sprint and unassigns (does not delete) its tickets", async () => {
    ticket._seedSprint(PROJECT_ID, { id: "s1", order: 1, name: "Doomed" });
    const t = await ticket.create(PROJECT_ID, { title: "Kept" });
    await ticket.setTicketSprint(PROJECT_ID, t.ref, "s1", t.version);

    const dialog = await openManager();

    fireEvent.click(
      await within(dialog).findByLabelText("delete sprint Doomed"),
    );
    // The confirmation explains tickets are unassigned, not deleted.
    const confirm = await screen.findByRole("dialog", {
      name: "delete sprint confirmation",
    });
    expect(confirm.textContent).toMatch(/ne seront pas supprimés/i);
    fireEvent.click(within(confirm).getByLabelText("confirm delete sprint"));

    await waitFor(async () => {
      expect(await ticket.listSprints(PROJECT_ID)).toHaveLength(0);
    });
    // The ticket still exists, just unassigned.
    const fresh = await ticket.read(PROJECT_ID, t.ref);
    expect(fresh.sprintId).toBeNull();
    expect(fresh.title).toBe("Kept");
  });

  it("adds a backlog ticket to a sprint via the add selector", async () => {
    ticket._seedSprint(PROJECT_ID, { id: "s1", order: 1, name: "Target" });
    const t = await ticket.create(PROJECT_ID, { title: "Backlog item" });

    const dialog = await openManager();

    fireEvent.change(
      await within(dialog).findByLabelText("add ticket to sprint Target"),
      { target: { value: t.ref } },
    );

    await waitFor(async () => {
      const fresh = await ticket.read(PROJECT_ID, t.ref);
      expect(fresh.sprintId).toBe("s1");
    });
  });

  it("removes a ticket from a sprint", async () => {
    ticket._seedSprint(PROJECT_ID, { id: "s1", order: 1, name: "Holder" });
    const t = await ticket.create(PROJECT_ID, { title: "Member" });
    await ticket.setTicketSprint(PROJECT_ID, t.ref, "s1", t.version);

    const dialog = await openManager();

    fireEvent.click(
      await within(dialog).findByLabelText(`remove ${t.ref} from sprint`),
    );

    await waitFor(async () => {
      const fresh = await ticket.read(PROJECT_ID, t.ref);
      expect(fresh.sprintId).toBeNull();
    });
  });
});