import api from './api'
import { Category } from './queries'

// 分类服务 - 处理分类相关的API调用
class CategoryService {
  private categoryCache: Map<number, string> = new Map()

  // 获取所有分类
  async getAllCategories(): Promise<Category[]> {
    if (process.env.NEXT_PUBLIC_USE_REAL_API === 'true') {
      const response: any = await api.get('/categories?page=1&page_size=100')
      return response?.categories || []
    } else {
      // Mock API 返回字符串数组，需要转换
      const categories: string[] = await api.get('/categories')
      return categories.map((name: string, index: number) => ({
        id: index + 1,
        name,
        description: '',
        created_at: Date.now() / 1000,
        updated_at: Date.now() / 1000
      }))
    }
  }

  // 根据分类ID获取分类名称
  async getCategoryName(categoryId: number): Promise<string> {
    if (this.categoryCache.has(categoryId)) {
      return this.categoryCache.get(categoryId)!
    }

    try {
      const categories = await this.getAllCategories()
      // 缓存所有分类
      categories.forEach(cat => {
        this.categoryCache.set(cat.id, cat.name)
      })
      
      return this.categoryCache.get(categoryId) || 'unknown'
    } catch (error) {
      console.error('获取分类名称失败:', error)
      return 'unknown'
    }
  }

  // 清除缓存
  clearCache() {
    this.categoryCache.clear()
  }
}

export const categoryService = new CategoryService()