/**
 * task_manager 工具（v0.7.0 覆盖补齐 → v0.7.5 大幅扩充）
 *
 * - TaskManagerTool：SQLite 持久化 CRUD / 会话隔离 / 父子级联递归删除 /
 *   order_idx 递增 / 枚举校验 / onTaskChanged 回调
 *   （better-sqlite3 ABI 门控：系统 Node 自动跳过，test:electron 全执行）
 */

import { describe, it, expect, beforeAll, afterAll, vi } from 'vitest';

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

import { mkdtempSync, rmSync } from 'fs';
import { tmpdir } from 'os';
import { join } from 'path';

// ===== task_manager（ABI 门控）=====

let dbAvailable = false;
try {
  // eslint-disable-next-line @typescript-eslint/no-require-imports
  const Probe = require('better-sqlite3');
  const p = new Probe(':memory:');
  p.close();
  dbAvailable = true;
} catch {
  dbAvailable = false;
}

// 工具返回的是 task-manager.ts 的 Task 形状（camelCase，见 mapRow()），
// 非数据库行 snake_case。此接口仅供测试内类型标注，需与真实返回对齐。
interface TaskRowLike {
  id: string;
  sessionId?: string;
  title?: string;
  status?: string;
  priority?: string;
  parentId?: string | null;
  order?: number;
  completedAt?: number | null;
}

describe.skipIf(!dbAvailable)('task_manager — CRUD / 会话隔离 / 回调联动', () => {
  let db: any;
  let wsDir: string;
  let tool: { execute(args: Record<string, unknown>, ctx: unknown): Promise<unknown> };
  let notifyCalls: Array<{ sessionId?: string }> = [];

  function ctxFor(sessionId?: string) {
    return { sessionId, workspacePath: wsDir, iteration: 1, requestId: 'r' };
  }

  beforeAll(async () => {
    // eslint-disable-next-line @typescript-eslint/no-require-imports -- ABI 门控与夹具需同步 require
    const D = require('better-sqlite3');
    db = new D(':memory:');
    db.exec(`
      CREATE TABLE sessions (
        id TEXT PRIMARY KEY,
        title TEXT DEFAULT '新会话',
        created_at INTEGER NOT NULL,
        updated_at INTEGER NOT NULL,
        message_count INTEGER DEFAULT 0,
        pinned INTEGER DEFAULT 0,
        archived INTEGER DEFAULT 0,
        metadata TEXT DEFAULT '{}'
      );
      CREATE TABLE tasks (
        id              TEXT PRIMARY KEY,
        session_id      TEXT NOT NULL,
        title           TEXT NOT NULL,
        description     TEXT NOT NULL DEFAULT '',
        status          TEXT NOT NULL DEFAULT 'pending' CHECK(status IN ('pending','in_progress','completed','blocked','cancelled')),
        priority        TEXT NOT NULL DEFAULT 'medium' CHECK(priority IN ('low','medium','high','critical')),
        parent_id       TEXT,
        assigned_to     TEXT,
        order_idx       INTEGER NOT NULL DEFAULT 0,
        created_at      INTEGER NOT NULL DEFAULT (unixepoch() * 1000),
        updated_at      INTEGER NOT NULL DEFAULT (unixepoch() * 1000),
        completed_at    INTEGER,
        FOREIGN KEY (session_id) REFERENCES sessions(id) ON DELETE CASCADE,
        FOREIGN KEY (parent_id) REFERENCES tasks(id) ON DELETE CASCADE
      );
      INSERT INTO sessions (id, created_at, updated_at) VALUES ('s_task', ${Date.now()}, ${Date.now()});
      INSERT INTO sessions (id, created_at, updated_at) VALUES ('s_other', ${Date.now()}, ${Date.now()});
    `);

    const { TaskManagerTool } = await import('../task-manager');
    notifyCalls = [];
    const manager = new TaskManagerTool(
      () => db,
      (sessionId?: string) => notifyCalls.push({ sessionId }),
    );
    tool = manager as unknown as typeof tool;
    wsDir = mkdtempSync(join(tmpdir(), 'metona-task-'));
  });

  afterAll(() => {
    try {
      db?.close();
    } catch {
      /* ignore */
    }
    try {
      rmSync(wsDir, { recursive: true, force: true });
    } catch {
      /* ignore */
    }
  });

  it('create → list → complete → update → delete 全链路；回调每次触发', async () => {
    const created = (await tool.execute(
      { operation: 'create', title: '任务甲', priority: 'high' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike; id?: string; success?: boolean };

    const taskId = created.task?.id ?? (created.id as string);
    expect(taskId).toBeTruthy();

    const list = (await tool.execute({ operation: 'list' }, ctxFor('s_task'))) as {
      tasks?: Array<TaskRowLike>;
      rows?: Array<TaskRowLike>;
    };
    const listRows = (list.tasks ?? list.rows ?? []) as Array<TaskRowLike>;
    expect(listRows.some((r) => r.title === '任务甲')).toBe(true);

    const doneRes = await tool.execute(
      { operation: 'complete', task_id: taskId },
      ctxFor('s_task'),
    );
    expect(doneRes).toBeDefined();

    const updRes = await tool.execute(
      { operation: 'update', task_id: taskId, updates: { status: 'in_progress' } },
      ctxFor('s_task'),
    );
    expect(updRes).toBeDefined();

    const delRes = await tool.execute({ operation: 'delete', task_id: taskId }, ctxFor('s_task'));
    expect(delRes).toBeDefined();
    expect(notifyCalls.length).toBeGreaterThanOrEqual(1);
  });

  it('会话隔离：列表按 session 过滤，跨会话不可见（真实断言，替代恒真）', async () => {
    await tool.execute({ operation: 'create', title: '隔离样例' }, ctxFor('s_task'));
    const otherList = (await tool.execute({ operation: 'list' }, ctxFor('s_other'))) as {
      tasks?: Array<TaskRowLike>;
      rows?: Array<TaskRowLike>;
    };
    const rows = otherList.tasks ?? otherList.rows ?? [];
    // 修正：原断言 `r.title !== '隔离样例' || ... || true` 恒真。真实契约是
    // listTasks 按 session_id 过滤 —— s_other 列表绝不包含 s_task 创建的任务。
    expect(rows.some((r) => r.title === '隔离样例')).toBe(false);

    // 双向验证：s_task 自己能看到该任务
    const ownList = (await tool.execute({ operation: 'list' }, ctxFor('s_task'))) as {
      tasks?: Array<TaskRowLike>;
    };
    expect((ownList.tasks ?? []).some((r) => r.title === '隔离样例')).toBe(true);
  });

  it('非法 operation 枚举失败；缺 title 的 create 失败', async () => {
    const badOp = await tool.execute({ operation: 'frobnicate' }, ctxFor('s_task'));
    const badCreate = await tool.execute({ operation: 'create' }, ctxFor('s_task'));
    const badSignal =
      JSON.stringify(badOp).includes('"success":false') || JSON.stringify(badOp).includes('error');
    expect(badSignal).toBe(true);
    expect(JSON.stringify(badCreate)).toContain('"success":false');
  });

  it('create 校验 priority 枚举：非法值拒绝', async () => {
    const bad = (await tool.execute(
      { operation: 'create', title: 'x', priority: 'urgent' },
      ctxFor('s_task'),
    )) as { success: boolean; error?: string };
    expect(bad.success).toBe(false);
    expect(String(bad.error)).toContain('Invalid priority');

    const ok = (await tool.execute(
      { operation: 'create', title: 'pri-ok', priority: 'critical' },
      ctxFor('s_task'),
    )) as { success: boolean };
    expect(ok.success).toBe(true);
  });

  it('order_idx 同 session 同 parent 下递增', async () => {
    await tool.execute({ operation: 'create', title: 'o1' }, ctxFor('s_task'));
    await tool.execute({ operation: 'create', title: 'o2' }, ctxFor('s_task'));
    const list = (await tool.execute({ operation: 'list' }, ctxFor('s_task'))) as {
      tasks: Array<TaskRowLike>;
    };
    const orders = list.tasks
      .filter((t) => ['o1', 'o2'].includes(String(t.title)))
      .map((t) => Number(t.order))
      .sort((a, b) => a - b);
    expect(orders).toEqual([orders[0], orders[0] + 1]); // 连续递增
  });

  it('create 支持 parent_id 建立父子关系', async () => {
    const parent = (await tool.execute(
      { operation: 'create', title: '父任务' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const parentId = parent.task!.id;
    const child = (await tool.execute(
      { operation: 'create', title: '子任务', parent_id: parentId },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    expect(child.task!.parentId).toBe(parentId);
    expect(child.task!.order).toBe(0); // 子任务独立 order 序列
  });

  it('get 返回任务与其子任务（仅限本会话）', async () => {
    const parent = (await tool.execute(
      { operation: 'create', title: 'get-父' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const parentId = parent.task!.id;
    await tool.execute(
      { operation: 'create', title: 'get-子1', parent_id: parentId },
      ctxFor('s_task'),
    );
    const r = (await tool.execute({ operation: 'get', task_id: parentId }, ctxFor('s_task'))) as {
      success: boolean;
      task?: TaskRowLike;
      subtasks?: Array<TaskRowLike>;
    };
    expect(r.success).toBe(true);
    expect(r.task?.id).toBe(parentId);
    expect((r.subtasks ?? []).map((s) => String(s.title))).toContain('get-子1');
  });

  it('get 跨会话访问不存在 → 失败（会话隔离）', async () => {
    const parent = (await tool.execute(
      { operation: 'create', title: 'get-隔离' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const r = (await tool.execute(
      { operation: 'get', task_id: parent.task!.id },
      ctxFor('s_other'),
    )) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('complete 标记 completed_at 且状态正确', async () => {
    const created = (await tool.execute(
      { operation: 'create', title: 'complete-me' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const id = created.task!.id;
    const r = (await tool.execute({ operation: 'complete', task_id: id }, ctxFor('s_task'))) as {
      success: boolean;
      completed_at?: number;
    };
    expect(r.success).toBe(true);
    expect(typeof r.completed_at).toBe('number');

    const got = (await tool.execute({ operation: 'get', task_id: id }, ctxFor('s_task'))) as {
      task?: TaskRowLike;
    };
    expect(got.task?.status).toBe('completed');
    expect(got.task?.completedAt).not.toBeNull();
  });

  it('complete 跨会话任务 → 失败（会话隔离）', async () => {
    const created = (await tool.execute(
      { operation: 'create', title: 'complete-隔离' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const r = (await tool.execute(
      { operation: 'complete', task_id: created.task!.id },
      ctxFor('s_other'),
    )) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('update 非法 status 经顶层参数拒绝', async () => {
    const created = (await tool.execute(
      { operation: 'create', title: 'update-enum' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const id = created.task!.id;
    const badStatus = (await tool.execute(
      { operation: 'update', task_id: id, status: 'done' },
      ctxFor('s_task'),
    )) as { success: boolean };
    expect(badStatus.success).toBe(false);

    const badPri = (await tool.execute(
      { operation: 'update', task_id: id, priority: 'urgent' },
      ctxFor('s_task'),
    )) as { success: boolean };
    expect(badPri.success).toBe(false);
  });

  it('update 可同时改多个字段（顶层字段语义，实况契约：更新字段非 updates 包）', async () => {
    const created = (await tool.execute(
      { operation: 'create', title: 'multi-update' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const id = created.task!.id;
    const r = (await tool.execute(
      { operation: 'update', task_id: id, title: '改名', status: 'in_progress', priority: 'high' },
      ctxFor('s_task'),
    )) as { success: boolean; task?: TaskRowLike };
    expect(r.success).toBe(true);
    expect(r.task?.title).toBe('改名');
    expect(r.task?.status).toBe('in_progress');
    expect(r.task?.priority).toBe('high');
  });

  it('update 通过 updates 包装字段 → 无可更新字段而失败（实况契约：参数在顶层）', async () => {
    const created = (await tool.execute(
      { operation: 'create', title: 'updates-wrapper' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const r = (await tool.execute(
      { operation: 'update', task_id: created.task!.id, updates: { title: '被忽略' } },
      ctxFor('s_task'),
    )) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('update 无可更新字段 → 失败', async () => {
    const created = (await tool.execute(
      { operation: 'create', title: 'no-op-update' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const r = (await tool.execute(
      { operation: 'update', task_id: created.task!.id, updates: {} },
      ctxFor('s_task'),
    )) as { success: boolean };
    expect(r.success).toBe(false);
    expect(String((r as { error?: string }).error)).toContain('No fields to update');
  });

  it('update 跨会话任务 → 失败（会话隔离）', async () => {
    const created = (await tool.execute(
      { operation: 'create', title: 'update-隔离' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const r = (await tool.execute(
      { operation: 'update', task_id: created.task!.id, updates: { title: 'hack' } },
      ctxFor('s_other'),
    )) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('缺 task_id 的 update/complete/delete/get 各自失败', async () => {
    for (const op of ['update', 'complete', 'delete', 'get']) {
      const r = (await tool.execute({ operation: op }, ctxFor('s_task'))) as { success: boolean };
      expect(r.success, `expected ${op} to reject missing task_id`).toBe(false);
    }
  });

  it('delete 父任务递归删除全部子任务（级联）', async () => {
    const parent = (await tool.execute(
      { operation: 'create', title: 'del-父' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const parentId = parent.task!.id;
    const child1 = (await tool.execute(
      { operation: 'create', title: 'del-子1', parent_id: parentId },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const child2 = (await tool.execute(
      { operation: 'create', title: 'del-子2', parent_id: parentId },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };

    const r = (await tool.execute(
      { operation: 'delete', task_id: parentId },
      ctxFor('s_task'),
    )) as {
      success: boolean;
      deleted?: number;
    };
    expect(r.success).toBe(true);
    expect(r.deleted).toBe(3); // 父 + 2 子

    for (const cid of [parentId, child1.task!.id, child2.task!.id]) {
      const got = (await tool.execute({ operation: 'get', task_id: cid }, ctxFor('s_task'))) as {
        success: boolean;
      };
      expect(got.success).toBe(false);
    }
  });

  it('delete 跨会话任务 → 失败（会话隔离）', async () => {
    const created = (await tool.execute(
      { operation: 'create', title: 'delete-隔离' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const r = (await tool.execute(
      { operation: 'delete', task_id: created.task!.id },
      ctxFor('s_other'),
    )) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('list 支持 status 过滤与 by_status 统计', async () => {
    await tool.execute({ operation: 'create', title: 'stat-a' }, ctxFor('s_task'));
    const pending = (await tool.execute(
      { operation: 'list', status: 'pending' },
      ctxFor('s_task'),
    )) as { tasks: Array<TaskRowLike>; by_status: Record<string, number> };
    expect(pending.tasks.every((t) => t.status === 'pending')).toBe(true);
    expect(typeof pending.by_status.pending).toBe('number');
    expect(pending.by_status.pending).toBeGreaterThanOrEqual(1);
  });

  it('list 返回 count 与各状态计数键', async () => {
    const r = (await tool.execute({ operation: 'list' }, ctxFor('s_task'))) as {
      count: number;
      tasks: Array<TaskRowLike>;
      by_status: Record<string, number>;
    };
    expect(r.count).toBe(r.tasks.length);
    for (const s of ['pending', 'in_progress', 'completed', 'blocked', 'cancelled']) {
      expect(s in r.by_status).toBe(true);
    }
  });

  it('list 按 order_idx 升序排列', async () => {
    const r = (await tool.execute({ operation: 'list' }, ctxFor('s_task'))) as {
      tasks: Array<TaskRowLike>;
    };
    const orders = r.tasks.map((t) => Number(t.order));
    const sorted = [...orders].sort((a, b) => a - b);
    expect(orders).toEqual(sorted);
  });

  it('notify 回调仅对写操作触发（create/update/complete/delete），list/get 不触发', async () => {
    const before = notifyCalls.length;
    await tool.execute({ operation: 'list' }, ctxFor('s_task'));
    const created = (await tool.execute(
      { operation: 'create', title: 'notify-probe' },
      ctxFor('s_task'),
    )) as { task?: TaskRowLike };
    const got = await tool.execute(
      { operation: 'get', task_id: created.task!.id },
      ctxFor('s_task'),
    );
    void got;
    // 只有 create 触发；list/get 不触发
    expect(notifyCalls.length).toBe(before + 1);
  });

  it('notify 回调异常不影响工具主流程', async () => {
    // 单独构造一个回调抛错的 manager
    const { TaskManagerTool } = await import('../task-manager');
    const badManager = new TaskManagerTool(
      () => db,
      () => {
        throw new Error('callback boom');
      },
    );
    const badTool = badManager as unknown as typeof tool;
    const r = (await badTool.execute(
      { operation: 'create', title: 'cb-ok' },
      ctxFor('s_task'),
    )) as { success: boolean };
    expect(r.success).toBe(true); // 回调失败不阻断创建
  });

  it('create 返回完整 task 结构（camelCase sessionId/parentId/assignedTo/order）', async () => {
    const r = (await tool.execute({ operation: 'create', title: 'shape' }, ctxFor('s_task'))) as {
      success: boolean;
      task?: Record<string, unknown>;
    };
    expect(r.success).toBe(true);
    const t = r.task!;
    expect(t.sessionId).toBe('s_task');
    expect(t.parentId).toBeNull();
    expect(typeof t.order).toBe('number');
    expect(t.status).toBe('pending');
    expect(t.priority).toBe('medium'); // 默认值
    expect(t.completedAt).toBeNull();
    expect(typeof t.id).toBe('string');
  });

  it('不同 session 的 order_idx 各自独立', async () => {
    await tool.execute({ operation: 'create', title: 'ord-a' }, ctxFor('s_other'));
    await tool.execute({ operation: 'create', title: 'ord-b' }, ctxFor('s_other'));
    const r = (await tool.execute({ operation: 'list' }, ctxFor('s_other'))) as {
      tasks: Array<TaskRowLike>;
    };
    const orders = r.tasks.map((t) => Number(t.order));
    expect(orders).toEqual([0, 1]); // s_other 独立从 0 开始
  });
});