/**
 * @file CodexConfig.test.tsx
 * @description Covers the two load-bearing behaviors of the Codex config
 * panel: create/edit/delete is offered on the authored surfaces (skills,
 * agents, rules, memory, config) and withheld on the CLI-owned ones (mcp,
 * plugins); and saves go through `api.codexConfig`, not the Claude client.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, it, expect, vi, afterEach } from "vitest";
import { render, screen, act } from "@testing-library/react";
import userEvent from "@testing-library/user-event";

// vi.mock factories are hoisted above the rest of the module, so the mock
// object they reference must be created inside vi.hoisted() too.
const codexConfigMock = vi.hoisted(() => {
  const r = (value: unknown) => vi.fn().mockResolvedValue(value);
  return {
    overview: r({
      roots: { codexHome: "/home/.codex", projectCodexDir: "/repo/.codex", projectRoot: "/repo" },
      counts: {
        skills: { user: 0, project: 0 },
        agents: { user: 0, project: 0 },
        rules: { user: 0, project: 0 },
        memory: { user: 0, project: 0 },
        config: { user: 0, project: 0 },
      },
    }),
    skills: r({ skills: [] }),
    agents: r({ agents: [] }),
    rules: r({ rules: [] }),
    memory: r({ memory: [] }),
    config: r({ config: [] }),
    file: r({ ok: true, file: "", size: 0, mtime: 0, truncated: false, text: "" }),
    write: r({ file: "/f", created: true }),
    remove: r({ file: "/f" }),
    mcp: r({ mcp: [] }),
    plugins: r({ plugins: [] }),
    marketplaces: r({ marketplaces: [] }),
    mcpAdd: r({ ok: true, stdout: "", stderr: "" }),
    mcpRemove: r({ ok: true, stdout: "", stderr: "" }),
    pluginAction: r({ ok: true, stdout: "", stderr: "" }),
    marketplaceAdd: r({ ok: true, stdout: "", stderr: "" }),
    marketplaceAction: r({ ok: true, stdout: "", stderr: "" }),
    backups: r({ items: [] }),
  };
});

vi.mock("../../lib/api", async (importOriginal) => {
  const actual = await importOriginal<Record<string, unknown>>();
  return {
    ...actual,
    api: {
      ...(actual.api as Record<string, unknown>),
      codexConfig: codexConfigMock,
    },
  };
});

vi.mock("../../lib/eventBus", () => ({
  eventBus: {
    subscribe: () => () => {},
    publish: () => {},
    onConnection: () => () => {},
    connected: true,
    setConnected: () => {},
  },
}));

import { CodexConfig } from "../CodexConfig";

/** Reset the mock to its defaults, then apply the given overrides (each
 *  value is wrapped in a resolved-promise mock unless already a mock fn). */
function stubCodexApi(overrides: {
  skills?: unknown[];
  rules?: { scope: "user" | "project"; name: string; file: string; size: number }[];
  mcp?: { servers?: unknown[] };
  write?: ReturnType<typeof vi.fn>;
}) {
  codexConfigMock.skills.mockResolvedValue({ skills: overrides.skills ?? [] });
  codexConfigMock.rules.mockResolvedValue({ rules: overrides.rules ?? [] });
  codexConfigMock.mcp.mockResolvedValue({ mcp: overrides.mcp?.servers ?? [] });
  if (overrides.write) codexConfigMock.write = overrides.write as never;
}

async function settle() {
  await act(async () => {
    await new Promise((res) => setTimeout(res, 0));
    await new Promise((res) => setTimeout(res, 0));
  });
}

afterEach(() => {
  vi.clearAllMocks();
  codexConfigMock.write = vi.fn().mockResolvedValue({ file: "/f", created: true }) as never;
  codexConfigMock.remove = vi.fn().mockResolvedValue({ file: "/f" }) as never;
});

describe("CodexConfig", () => {
  it("offers create on the authored surfaces and withholds it on the CLI-owned ones", async () => {
    stubCodexApi({ skills: [], mcp: { servers: [] } });
    render(<CodexConfig />);
    await settle();

    await userEvent.click(screen.getByRole("tab", { name: /skills/i }));
    expect(screen.getByRole("button", { name: /new/i })).toBeInTheDocument();

    await userEvent.click(screen.getByRole("tab", { name: /mcp/i }));
    expect(screen.queryByRole("button", { name: /new/i })).not.toBeInTheDocument();
  });

  it("writes an edited rule back through the codex API, not the Claude one", async () => {
    const write = vi.fn().mockResolvedValue({ file: "/r/default.rules", created: false });
    stubCodexApi({
      rules: [{ scope: "user", name: "default", file: "/r/default.rules", size: 3 }],
      write,
    });
    render(<CodexConfig />);
    await settle();

    await userEvent.click(screen.getByRole("tab", { name: /rules/i }));
    await userEvent.click(screen.getByRole("button", { name: /edit/i }));
    await settle();
    await userEvent.click(screen.getByRole("button", { name: /save/i }));

    expect(write).toHaveBeenCalledWith(expect.objectContaining({ type: "rules", name: "default" }));
  });

  it("keeps the file-backed tabs working when the codex CLI read rejects", async () => {
    stubCodexApi({ skills: [{ scope: "user", name: "my-skill", file: "/s/my-skill", size: 3 }] });
    codexConfigMock.mcp.mockRejectedValueOnce(new Error("the codex CLI was not found on PATH"));
    render(<CodexConfig />);
    await settle();

    // No page-wide error banner - the CLI-backed rejection is isolated.
    expect(screen.queryByText(/failed to load/i)).not.toBeInTheDocument();

    // Pure file reads (skills) still rendered their data.
    await userEvent.click(screen.getByRole("tab", { name: /skills/i }));
    expect(screen.getByText("my-skill")).toBeInTheDocument();

    // The CLI-owned tab degrades gracefully instead of spinning forever.
    await userEvent.click(screen.getByRole("tab", { name: /mcp/i }));
    expect(screen.getByText(/codex cli isn't available/i)).toBeInTheDocument();
  });

  it("creates a nameless-type artifact (config.toml) without requiring a name", async () => {
    const write = vi.fn().mockResolvedValue({ file: "/c/config.toml", created: true });
    stubCodexApi({ write });
    render(<CodexConfig />);
    await settle();

    await userEvent.click(screen.getByRole("tab", { name: /config/i }));
    const newButtons = screen.getAllByRole("button", { name: /new/i });
    await userEvent.click(newButtons[0]!);
    await settle();

    // No name field, no client-side "Name" validation error blocking save.
    expect(screen.queryByPlaceholderText(/name/i)).not.toBeInTheDocument();
    await userEvent.click(screen.getByRole("button", { name: /save/i }));

    expect(write).toHaveBeenCalledWith(
      expect.objectContaining({ type: "config", name: undefined })
    );
  });

  it("opens the backups modal and lists what the codex API returns", async () => {
    codexConfigMock.backups.mockResolvedValueOnce({
      items: [
        {
          type: "rules",
          name: "default.2026-09-08.bak",
          file: "/r/default.bak",
          mtime: 0,
          size: 3,
        },
      ],
    });
    render(<CodexConfig />);
    await settle();

    await userEvent.click(screen.getByRole("button", { name: /backups/i }));
    await settle();

    expect(screen.getByText("default.2026-09-08.bak")).toBeInTheDocument();
  });
});