/**
 * @file Data-safety tests for the Claude Code config page: the settings editor
 * unsets only keys from the snapshot it opened (never one written meanwhile),
 * a renamed key keeps its value, one failing endpoint blanks only its own tab,
 * the tab lives in `?tab=`, the Project scope is refused under the plugin
 * cache, and the pure helpers (change → keys, restore command) are right.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, it, expect, vi, afterEach } from "vitest";
import { render, screen, act, within } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { MemoryRouter } from "react-router-dom";
import { settleConfirm, subscribeConfirm, type PendingConfirm } from "../../lib/confirm";
import { eventBus } from "../../lib/eventBus";

const ccConfigMock = vi.hoisted(() => {
  const r = (value: unknown) => vi.fn().mockResolvedValue(value);
  return {
    overview: r({
      roots: {
        claudeHome: "/home/.claude",
        projectClaudeDir: "/repo/.claude",
        projectRoot: "/repo",
      },
      counts: {
        skills: { user: 0, project: 0 },
        agents: { user: 0, project: 0 },
        commands: { user: 0, project: 0 },
        outputStyles: { user: 0, project: 0 },
        mcpServers: { user: 0, project: 0 },
        hooks: {},
        plugins: 0,
        marketplaces: 0,
        keybindings: 0,
        settingsFiles: 1,
        memory: 0,
      },
    }),
    skills: r({ items: [] }),
    agents: r({ items: [] }),
    commands: r({ items: [] }),
    outputStyles: r({ items: [] }),
    memory: r({ items: [] }),
    plugins: r({ manifestPath: "", manifestExists: false, plugins: [] }),
    marketplaces: r({ items: [] }),
    mcp: r({ user: [], projectScoped: [] }),
    hooks: r({ items: [] }),
    settings: r({
      items: [{ scope: "user", file: "/home/.claude/settings.json", exists: true, data: { a: 1 } }],
    }),
    keybindings: r({ groups: [] }),
    statusline: r({ config: null, scripts: [] }),
    hookScripts: r({ items: [] }),
    patchSettings: r({ ok: true }),
    pluginsAvailable: r({ installed: [], available: [] }),
    updateAllStatus: r({ batch: null }),
  };
});

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

import { CcConfig, isPluginCachePath, keysForChange, restoreCommand } from "../CcConfig";

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

afterEach(() => vi.clearAllMocks());

describe("CcConfig — settings editor", () => {
  it("unsets only keys from its own snapshot, never one written after Edit", async () => {
    const user = userEvent.setup();
    render(
      <MemoryRouter initialEntries={["/settings/claude?tab=settings"]}>
        <CcConfig />
      </MemoryRouter>
    );
    await settle();
    await user.click(screen.getByRole("button", { name: /^edit$/i }));
    // The live CLI writes key `b` while the editor is open.
    ccConfigMock.settings.mockResolvedValue({
      items: [
        { scope: "user", file: "/home/.claude/settings.json", exists: true, data: { a: 1, b: 2 } },
      ],
    });
    vi.useFakeTimers({ shouldAdvanceTime: true });
    act(() =>
      eventBus.publish({
        type: "cc_config_changed",
        data: { source: "fs", paths: ["/home/.claude/settings.json"] },
      } as never)
    );
    await act(async () => {
      vi.advanceTimersByTime(300);
    });
    vi.useRealTimers();
    await settle();
    // Remove `a` and save.
    await user.click(screen.getAllByRole("button", { name: /remove key/i })[0]!);
    let pending: PendingConfirm | null = null;
    const off = subscribeConfirm((p) => (pending = p));
    await user.click(screen.getByRole("button", { name: /^save$/i }));
    await settle();
    // The file changed underneath: it asks before writing.
    expect(pending).not.toBeNull();
    await act(async () => settleConfirm(true));
    await settle();
    off();
    expect(ccConfigMock.patchSettings).toHaveBeenCalledWith({ scope: "user", unset: ["a"] });
  });

  it("a renamed key is sent under its new name, not dropped", async () => {
    const user = userEvent.setup();
    render(
      <MemoryRouter initialEntries={["/?tab=settings"]}>
        <CcConfig />
      </MemoryRouter>
    );
    await settle();
    await user.click(screen.getByRole("button", { name: /^edit$/i }));
    const keyBox = screen.getByDisplayValue("a");
    await user.clear(keyBox);
    await user.type(keyBox, "z");
    await user.click(screen.getByRole("button", { name: /^save$/i }));
    await settle();
    expect(ccConfigMock.patchSettings).toHaveBeenCalledWith({
      scope: "user",
      set: { z: 1 },
      unset: ["a"],
    });
  });
});

describe("CcConfig — redacted and read-only entries", () => {
  it("refuses a new settings key that names a redacted one (it would replace the secret)", async () => {
    ccConfigMock.settings.mockResolvedValue({
      items: [
        {
          scope: "user",
          file: "/home/.claude/settings.json",
          exists: true,
          data: { a: 1, env: { API_KEY: "<redacted>" } },
        },
      ],
    });
    const user = userEvent.setup();
    render(
      <MemoryRouter initialEntries={["/?tab=settings"]}>
        <CcConfig />
      </MemoryRouter>
    );
    await settle();
    await user.click(screen.getByRole("button", { name: /^edit$/i }));
    await user.click(screen.getByRole("button", { name: /add key/i }));
    const keys = screen.getAllByRole("textbox", { name: /^key$/i });
    await user.type(keys[keys.length - 1]!, "env");
    await user.click(screen.getByRole("button", { name: /^save$/i }));
    await settle();
    expect(ccConfigMock.patchSettings).not.toHaveBeenCalled();
    expect(screen.getByText(/redacted/i, { selector: "span" })).toBeInTheDocument();
  });

  it("refuses a new hook event that names a read-only one (it would replace its entries)", async () => {
    ccConfigMock.hooks.mockResolvedValue({
      items: [
        {
          scope: "user",
          file: "/home/.claude/settings.json",
          exists: true,
          hooks: { Stop: [{ type: "prompt", prompt: "x" }] },
        },
      ],
    });
    const user = userEvent.setup();
    render(
      <MemoryRouter initialEntries={["/?tab=hooks"]}>
        <CcConfig />
      </MemoryRouter>
    );
    await settle();
    await user.click(screen.getByRole("button", { name: /^edit$/i }));
    await user.click(screen.getByRole("button", { name: /add event/i }));
    await user.type(screen.getByRole("textbox", { name: /event/i }), "Stop");
    await user.type(screen.getByRole("textbox", { name: /command/i }), "echo hi");
    await user.click(screen.getByRole("button", { name: /^save$/i }));
    await settle();
    expect(ccConfigMock.patchSettings).not.toHaveBeenCalled();
    expect(
      screen.getByText(/can't be edited here|read-only/i, { selector: "span" })
    ).toBeInTheDocument();
  });
});

describe("CcConfig — page", () => {
  it("one failing endpoint shows its error on its own tab and leaves the rest working", async () => {
    ccConfigMock.mcp.mockRejectedValueOnce(new Error("mcp down"));
    const user = userEvent.setup();
    render(
      <MemoryRouter initialEntries={["/?tab=skills"]}>
        <CcConfig />
      </MemoryRouter>
    );
    await settle();
    expect(screen.queryByText(/mcp down/)).toBeNull();
    expect(screen.getByRole("tab", { name: /skills/i })).toHaveAttribute("aria-selected", "true");
    await user.click(screen.getByRole("tab", { name: /mcp/i }));
    expect(await screen.findByText(/mcp down/)).toBeInTheDocument();
  });

  it("arrow keys move between tabs (roving tabindex)", async () => {
    const user = userEvent.setup();
    render(
      <MemoryRouter>
        <CcConfig />
      </MemoryRouter>
    );
    await settle();
    const list = screen.getByRole("tablist");
    const overview = within(list).getByRole("tab", { name: /overview/i });
    expect(overview).toHaveAttribute("tabindex", "0");
    overview.focus();
    await user.keyboard("{ArrowRight}");
    expect(within(list).getByRole("tab", { name: /skills/i })).toHaveAttribute(
      "aria-selected",
      "true"
    );
    expect(document.activeElement).toBe(within(list).getByRole("tab", { name: /skills/i }));
  });

  it("refuses the Project scope when the project root is the plugin cache", async () => {
    ccConfigMock.overview.mockResolvedValueOnce({
      roots: {
        claudeHome: "/home/.claude",
        projectClaudeDir: "/home/u/.claude/plugins/cache/agenthub/agenthub/1.8.13/.claude",
        projectRoot: "/home/u/.claude/plugins/cache/agenthub/agenthub/1.8.13",
      },
      counts: (await ccConfigMock.overview()).counts,
    });
    render(
      <MemoryRouter initialEntries={["/?tab=skills"]}>
        <CcConfig />
      </MemoryRouter>
    );
    await settle();
    expect(screen.getByRole("button", { name: /^project$/i })).toBeDisabled();
  });
});

describe("CcConfig helpers", () => {
  it("maps a change to the keys it touched", () => {
    expect(keysForChange({ source: "fs", paths: ["/h/.claude/skills/x/SKILL.md"] }).sort()).toEqual(
      ["overview", "skills"].sort()
    );
    expect(keysForChange({ source: "dashboard", type: "keybindings" }).sort()).toEqual(
      ["keybindings", "overview"].sort()
    );
    // Something unplaceable reloads everything.
    expect(keysForChange({ source: "fs", paths: ["/h/.claude/weird.txt"] })).toContain("mcp");
  });

  it("knows the plugin cache", () => {
    expect(isPluginCachePath("/home/u/.claude/plugins/cache/a/b/1.0")).toBe(true);
    expect(isPluginCachePath("/home/u/projects/app")).toBe(false);
    expect(isPluginCachePath(null)).toBe(false);
  });

  it("restores a skill directory by copying its contents, never mv into it", () => {
    expect(restoreCommand("/b/s.2026.bak", "/h/skills/s", true)).toBe(
      "mkdir -p /h/skills/s && cp -a /b/s.2026.bak/. /h/skills/s/"
    );
    expect(restoreCommand("/b/a.md.2026.bak", "/h/agents/a.md", false)).toBe(
      "cp -a /b/a.md.2026.bak /h/agents/a.md"
    );
  });
});