/**
 * IPC MCP / Tasks / Memory 域测试（v0.7.2 覆盖补齐）
 *
 * 锁定三类安全相关契约：
 * 1. mcp:addServer 的传输方式/必填字段/headers 逐项校验矩阵（v0.7.2 P2-8）
 * 2. tasks 域的枚举校验与会话越权防护（WHERE session_id = ? 契约）
 * 3. memory 域的查询参数收敛（topK 钳制/type 枚举）与删除表映射
 */

import { describe, it, expect, vi, beforeEach, type Mock } from 'vitest';

const ipcMainHandleMock = vi.fn();
vi.mock('electron', () => ({
  ipcMain: { handle: (...args: unknown[]) => ipcMainHandleMock(...args) },
}));

vi.mock('electron-log', () => ({
  default: { info: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn() },
}));

import { registerMCPHandlers } from '../mcp';
import { registerTaskHandlers } from '../tasks';
import { registerMemoryHandlers } from '../memory';
import type { IPCContext } from '../context';

function getHandler(channel: string): (...args: unknown[]) => Promise<unknown> {
  const call = ipcMainHandleMock.mock.calls.find(([ch]) => ch === channel);
  if (!call) throw new Error(`IPC handler not registered: ${channel}`);
  return call[1] as (...args: unknown[]) => Promise<unknown>;
}

beforeEach(() => {
  ipcMainHandleMock.mockClear();
});

// ===== MCP 域 =====

describe('mcp:addServer — 校验矩阵', () => {
  function makeCtx(): { ctx: IPCContext; addServer: Mock } {
    const addServer = vi.fn(async () => undefined);
    return { ctx: { mcpManager: { addServer } } as unknown as IPCContext, addServer };
  }

  it.each([
    [null, 'Invalid config'],
    [undefined, 'Invalid config'],
    [{ transport: 'stdio', command: 'npx' }, 'name is required'],
    [{ name: 'x', transport: 'ftp', command: 'npx' }, 'Invalid transport'],
    [{ name: 'x', transport: 'stdio' }, 'command is required'],
    [{ name: 'x', transport: 'stdio', command: '  ' }, 'command is required'],
    [{ name: 'x', transport: 'streamable-http' }, 'url is required'],
    [{ name: 'x', transport: 'sse', url: 'not a url' }, 'Invalid url format'],
  ])('非法载荷 %# 拒绝', async (payload, expectedError) => {
    const { ctx } = makeCtx();
    registerMCPHandlers(ctx);
    const result = (await getHandler('mcp:addServer')(null, payload)) as {
      success: boolean;
      error?: string;
    };
    expect(result.success).toBe(false);
    expect(result.error).toContain(expectedError);
  });

  it('stdio 合法载荷透传（不含 headers）', async () => {
    const { ctx, addServer } = makeCtx();
    registerMCPHandlers(ctx);

    const result = await getHandler('mcp:addServer')(null, {
      name: 'fs-server',
      transport: 'stdio',
      command: 'npx',
      args: ['-y', 'server'],
    });
    expect(result).toEqual({ success: true });
    expect(addServer).toHaveBeenCalledWith(
      expect.objectContaining({
        name: 'fs-server',
        transport: 'stdio',
        command: 'npx',
        enabled: true,
      }),
    );
  });

  it('v0.7.2 P2-8: headers 必须为扁平 string→string 对象', async () => {
    const { ctx } = makeCtx();
    registerMCPHandlers(ctx);
    const handler = getHandler('mcp:addServer');

    // 非对象
    expect(
      await handler(null, {
        name: 'x',
        transport: 'streamable-http',
        url: 'https://a.com/mcp',
        headers: 'Bearer x',
      }),
    ).toMatchObject({ success: false });
    // 数组
    expect(
      await handler(null, {
        name: 'x',
        transport: 'streamable-http',
        url: 'https://a.com/mcp',
        headers: [],
      }),
    ).toMatchObject({ success: false });
    // 值非字符串
    expect(
      await handler(null, {
        name: 'x',
        transport: 'streamable-http',
        url: 'https://a.com/mcp',
        headers: { Authorization: 123 },
      }),
    ).toMatchObject({ success: false });
    // 空键
    expect(
      await handler(null, {
        name: 'x',
        transport: 'streamable-http',
        url: 'https://a.com/mcp',
        headers: { '': 'v' },
      }),
    ).toMatchObject({ success: false });
    // 超过 20 项
    const tooMany = Object.fromEntries(Array.from({ length: 21 }, (_, i) => [`h${i}`, 'v']));
    expect(
      await handler(null, {
        name: 'x',
        transport: 'streamable-http',
        url: 'https://a.com/mcp',
        headers: tooMany,
      }),
    ).toMatchObject({ success: false });
    // 超长值
    expect(
      await handler(null, {
        name: 'x',
        transport: 'streamable-http',
        url: 'https://a.com/mcp',
        headers: { Authorization: 'x'.repeat(5000) },
      }),
    ).toMatchObject({ success: false });
  });

  it('headers 合法时透传给 manager；未提供时不携带该字段', async () => {
    const { ctx, addServer } = makeCtx();
    registerMCPHandlers(ctx);
    const handler = getHandler('mcp:addServer');

    await handler(null, {
      name: 'remote',
      transport: 'streamable-http',
      url: 'https://a.com/mcp',
      headers: { Authorization: 'Bearer tok' },
    });
    expect(addServer).toHaveBeenLastCalledWith(
      expect.objectContaining({ headers: { Authorization: 'Bearer tok' } }),
    );

    await handler(null, {
      name: 'remote2',
      transport: 'streamable-http',
      url: 'https://b.com/mcp',
    });
    const call = addServer.mock.calls[1][0] as Record<string, unknown>;
    expect(call.headers).toBeUndefined();
  });

  it('manager 抛错 → success:false + 错误信息', async () => {
    const { ctx, addServer } = makeCtx();
    addServer.mockRejectedValueOnce(new Error('connect timeout'));
    registerMCPHandlers(ctx);
    const result = (await getHandler('mcp:addServer')(null, {
      name: 'x',
      transport: 'stdio',
      command: 'node',
    })) as {
      success: boolean;
      error?: string;
    };
    expect(result.success).toBe(false);
    expect(result.error).toBe('connect timeout');
  });
});

describe('mcp:removeServer / toggleServer — 校验', () => {
  it('非法 name 拒绝；合法调用透传', async () => {
    const removeServer = vi.fn(async () => undefined);
    const toggleServer = vi.fn(async () => undefined);
    registerMCPHandlers({ mcpManager: { removeServer, toggleServer } } as unknown as IPCContext);

    expect(await getHandler('mcp:removeServer')(null, '')).toMatchObject({ success: false });
    expect(await getHandler('mcp:toggleServer')(null, 'x', 'yes')).toMatchObject({
      success: false,
    });
    expect(removeServer).not.toHaveBeenCalled();
    expect(toggleServer).not.toHaveBeenCalled();

    await getHandler('mcp:removeServer')(null, 'srv');
    expect(removeServer).toHaveBeenCalledWith('srv');
    await getHandler('mcp:toggleServer')(null, 'srv', false);
    expect(toggleServer).toHaveBeenCalledWith('srv', false);
  });
});

// ===== Tasks 域 =====

describe('tasks 域 — 会话越权防护与校验', () => {
  function makeDb(): { db: Record<string, Mock>; prepare: Mock } {
    const run = vi.fn();
    const get = vi.fn();
    const all = vi.fn(() => []);
    const prepare = vi.fn(() => ({ run, get, all }));
    return { db: { run, get, all }, prepare };
  }

  function makeCtx(): { ctx: IPCContext; prepare: Mock; run: Mock; get: Mock; all: Mock } {
    const { db, prepare } = makeDb();
    const sessionService = { getDB: () => ({ prepare }) };
    return {
      ctx: { sessionService } as unknown as IPCContext,
      prepare,
      run: db.run,
      get: db.get,
      all: db.all,
    };
  }

  it('tasks:create 校验 sessionId/title/priority/parentId', async () => {
    const { ctx } = makeCtx();
    registerTaskHandlers(ctx);
    const handler = getHandler('tasks:create');

    expect(await handler(null, null)).toMatchObject({ success: false });
    expect(await handler(null, { sessionId: '', title: 't' })).toMatchObject({ success: false });
    expect(await handler(null, { sessionId: 's', title: '  ' })).toMatchObject({ success: false });
    expect(await handler(null, { sessionId: 's', title: 't', priority: 'urgent' })).toMatchObject({
      success: false,
    });
    expect(await handler(null, { sessionId: 's', title: 't', parentId: 42 })).toMatchObject({
      success: false,
    });
  });

  it('tasks:create 合法路径：order_idx = 同组 MAX+1，ID 统一 nanoid 前缀', async () => {
    const { ctx, prepare, run } = makeCtx();
    (prepare as unknown as Mock).mockImplementation(() => ({
      run,
      get: vi.fn(() => ({ maxOrder: 4 })),
      all: vi.fn(() => []),
    }));
    registerTaskHandlers(ctx);

    const result = (await getHandler('tasks:create')(null, {
      sessionId: 's1',
      title: '新任务',
      priority: 'high',
      parentId: null,
    })) as { success: boolean; id: string };
    expect(result.success).toBe(true);
    expect(result.id).toMatch(/^task_/);
  });

  it('tasks:update 强制 WHERE session_id = ?（越权防护契约）', async () => {
    const { ctx, prepare, run } = makeCtx();
    prepare.mockImplementation(() => ({
      run,
      get: vi.fn(() => ({ id: 't1' })),
      all: vi.fn(() => []),
    }));
    registerTaskHandlers(ctx);

    await getHandler('tasks:update')(null, 't1', { status: 'completed' }, 'sess-owner');
    const sql = (prepare.mock.calls.find((c) => String(c[0]).startsWith('UPDATE'))?.[0] ??
      '') as string;
    expect(sql).toContain('AND session_id = ?');
    expect(run).toHaveBeenCalled();
  });

  it('tasks:update 枚举校验（status/priority/title/description 类型）', async () => {
    const { ctx } = makeCtx();
    registerTaskHandlers(ctx);
    const handler = getHandler('tasks:update');

    expect(await handler(null, 't1', { status: 'done' }, 's')).toMatchObject({ success: false });
    expect(await handler(null, 't1', { priority: 'critical!' }, 's')).toMatchObject({
      success: false,
    });
    expect(await handler(null, 't1', { title: 123 }, 's')).toMatchObject({ success: false });
    expect(await handler(null, 't1', { description: {} }, 's')).toMatchObject({ success: false });
    // 空更新为幂等 no-op（既有契约：fields 为空直接 success，不触发 UPDATE）
    expect(await handler(null, 't1', {}, 's')).toMatchObject({ success: true });
    expect(await handler(null, 't1', { status: 'completed' }, '')).toMatchObject({
      success: false,
    }); // 越权防护
  });

  it('tasks:delete 强制 WHERE session_id = ?', async () => {
    const { ctx, prepare, run } = makeCtx();
    registerTaskHandlers(ctx);

    await getHandler('tasks:delete')(null, 't1', 'sess-owner');
    const sql = (prepare.mock.calls[0][0] ?? '') as string;
    expect(sql).toContain('AND session_id = ?');
    expect(run).toHaveBeenCalled();
  });

  it('tasks:list 校验 sessionId 可选参数', async () => {
    const { ctx, all } = makeCtx();
    registerTaskHandlers(ctx);

    expect(await getHandler('tasks:list')(null, 42)).toMatchObject({ success: false });
    await getHandler('tasks:list')(null);
    expect(all).toHaveBeenCalled();
  });
});

// ===== Memory 域 =====

describe('memory 域 — 查询参数收敛与删除映射', () => {
  function makeCtx(): { ctx: IPCContext; prepare: Mock } {
    const prepare = vi.fn(() => ({ run: vi.fn(), get: vi.fn(), all: vi.fn(() => []) }));
    return {
      ctx: {
        memoryManager: { search: vi.fn(() => []) },
        sessionService: { getDB: () => ({ prepare }) },
      } as unknown as IPCContext,
      prepare,
    };
  }

  it('db:searchMemories 空 query 返回空数组；topK 钳制 1-100', async () => {
    const { ctx } = makeCtx();
    registerMemoryHandlers(ctx);
    const handler = getHandler('db:searchMemories');
    const search = (ctx.memoryManager as unknown as { search: Mock }).search;

    expect(await handler(null, '   ')).toEqual([]);
    await handler(null, 'q', { topK: 500 });
    expect(search).toHaveBeenCalledWith('q', expect.objectContaining({ topK: 10 })); // 非法回退默认 10
    await handler(null, 'q', { topK: 3 });
    expect(search).toHaveBeenLastCalledWith('q', expect.objectContaining({ topK: 3 }));
  });

  it('db:searchMemories type 必须为合法 MemoryType（非法被剔除）', async () => {
    const { ctx } = makeCtx();
    registerMemoryHandlers(ctx);
    const handler = getHandler('db:searchMemories');
    const search = (ctx.memoryManager as unknown as { search: Mock }).search;

    await handler(null, 'q', { type: 'semantic' });
    expect(search).toHaveBeenLastCalledWith('q', expect.objectContaining({ type: 'semantic' }));
    await handler(null, 'q', { type: 'hacked' });
    expect(search).toHaveBeenLastCalledWith(
      'q',
      expect.not.objectContaining({ type: expect.anything() }),
    );
  });

  it('memory:listAll 校验 type 枚举与 limit 范围（LIMIT -1 防护）', async () => {
    const { ctx } = makeCtx();
    registerMemoryHandlers(ctx);
    const handler = getHandler('memory:listAll');

    expect(await handler(null, { type: 'nope' })).toMatchObject({ success: false });
    expect(await handler(null, { limit: -1 })).toMatchObject({ success: false });
    expect(await handler(null, { limit: 5000 })).toMatchObject({ success: false });
  });

  it('memory:delete 按类型映射到正确的表（防止三元默认落到 working_memories）', async () => {
    const { ctx, prepare } = makeCtx();
    registerMemoryHandlers(ctx);
    const handler = getHandler('memory:delete');

    await handler(null, 'episodic', 'm1');
    expect(String(prepare.mock.calls[0][0])).toContain('episodic_memories');
    prepare.mockClear();

    await handler(null, 'semantic', 'm2');
    expect(String(prepare.mock.calls[0][0])).toContain('semantic_memories');
    prepare.mockClear();

    expect(await handler(null, 'unknown', 'm3')).toMatchObject({ success: false });
  });
});