import axios, { AxiosInstance } from 'axios'
import type { APIResponse } from '../types/api'

class APIClient {
  private client: AxiosInstance

  constructor() {
    this.client = axios.create({
      baseURL: '/admin/api/v1',
      headers: {
        'Content-Type': 'application/json',
      },
    })

    // Request interceptor for auth
    this.client.interceptors.request.use((config) => {
      const token = localStorage.getItem('auth_token')
      if (token) {
        config.headers.Authorization = `Bearer ${token}`
      }
      return config
    })

    // Response interceptor for error handling
    this.client.interceptors.response.use(
      (response) => response,
      (error) => {
        console.error('API Error:', error)
        return Promise.reject(error)
      }
    )
  }

  async get<T>(url: string): Promise<T> {
    const response = await this.client.get<APIResponse<T>>(url)
    if (response.data.success && response.data.data) {
      return response.data.data
    }
    throw new Error(response.data.error?.message || 'Unknown error')
  }

  async post<T>(url: string, data: any): Promise<T> {
    const response = await this.client.post<APIResponse<T>>(url, data)
    if (response.data.success && response.data.data) {
      return response.data.data
    }
    throw new Error(response.data.error?.message || 'Unknown error')
  }
}

export const apiClient = new APIClient()