/**
 * [MOCK-TASK] TaskCenter模块DataSource
 */

export interface Task {
  id: string;
  type: 'sync' | 'report' | 'import' | 'export' | 'automation';
  name: string;
  status: 'pending' | 'running' | 'completed' | 'failed';
  progress: number;
  total: number;
  result?: string;
  error?: string;
  startedAt?: string;
  completedAt?: string;
  createdAt: string;
}

export interface ITaskCenterDataSource {
  fetchTasks(params?: { status?: string; type?: string }): Promise<Task[]>;
  createTask(data: Partial<Task>): Promise<Task>;
  cancelTask(id: string): Promise<void>;
  retryTask(id: string): Promise<Task>;
  deleteTask(id: string): Promise<void>;
}

class MockTaskCenterDataSource implements ITaskCenterDataSource {
  async fetchTasks(params?: { status?: string; type?: string }): Promise<Task[]> {
    return [
      { id: 'task_001', type: 'sync', name: 'Inventory Sync - Amazon US', status: 'completed', progress: 100, total: 100, result: 'Synced 500 products', startedAt: '2026-03-18 10:00:00', completedAt: '2026-03-18 10:15:00', createdAt: '2026-03-18 09:55:00' },
      { id: 'task_002', type: 'report', name: 'Monthly Sales Report', status: 'running', progress: 65, total: 100, startedAt: '2026-03-18 14:00:00', createdAt: '2026-03-18 13:55:00' },
      { id: 'task_003', type: 'import', name: 'Product Import from CSV', status: 'failed', progress: 45, total: 100, error: 'Invalid SKU format at row 156', startedAt: '2026-03-18 11:00:00', completedAt: '2026-03-18 11:10:00', createdAt: '2026-03-18 10:55:00' },
      { id: 'task_004', type: 'export', name: 'Order Export - Q1 2026', status: 'pending', progress: 0, total: 100, createdAt: '2026-03-18 14:30:00' },
      { id: 'task_005', type: 'automation', name: 'Auto Price Adjustment', status: 'completed', progress: 100, total: 100, result: 'Updated 23 products', startedAt: '2026-03-18 08:00:00', completedAt: '2026-03-18 08:30:00', createdAt: '2026-03-18 07:55:00' },
    ];
  }

  async createTask(data: Partial<Task>): Promise<Task> {
    return { ...data, id: `task_${Date.now()}`, status: 'pending', progress: 0, total: 100, createdAt: new Date().toISOString() } as Task;
  }

  async cancelTask(id: string): Promise<void> {}
  async retryTask(id: string): Promise<Task> {
    return { id, type: 'sync', name: 'Retry Task', status: 'running', progress: 0, total: 100, startedAt: new Date().toISOString(), createdAt: new Date().toISOString() };
  }
  async deleteTask(id: string): Promise<void> {}
}

class ApiTaskCenterDataSource implements ITaskCenterDataSource {
  private baseUrl = '/api/tasks';

  async fetchTasks(params?: { status?: string; type?: string }): Promise<Task[]> {
    const query = new URLSearchParams(params as any).toString();
    const res = await fetch(`${this.baseUrl}?${query}`);
    return res.json();
  }

  async createTask(data: Partial<Task>): Promise<Task> {
    const res = await fetch(this.baseUrl, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(data) });
    return res.json();
  }

  async cancelTask(id: string): Promise<void> {
    await fetch(`${this.baseUrl}/${id}/cancel`, { method: 'POST' });
  }

  async retryTask(id: string): Promise<Task> {
    const res = await fetch(`${this.baseUrl}/${id}/retry`, { method: 'POST' });
    return res.json();
  }

  async deleteTask(id: string): Promise<void> {
    await fetch(`${this.baseUrl}/${id}`, { method: 'DELETE' });
  }
}

const useMock = process.env.REACT_APP_USE_MOCK === 'true';
export const taskCenterDataSource: ITaskCenterDataSource = useMock ? new MockTaskCenterDataSource() : new ApiTaskCenterDataSource();
