import { Authorization } from '@/constants/authorization';
import type { ResponseType } from '@/interfaces/database/base';
import i18n from '@/locales';
import axios from 'axios';
import type { AxiosRequestConfig, AxiosInstance, AxiosResponse, InternalAxiosRequestConfig } from 'axios';

import { snackbar, notification } from '@/utils/snackbarInstance';

const FAILED_TO_FETCH = 'Failed to fetch';

export const RetcodeMessage = {
  200: i18n.t('message.200'),
  201: i18n.t('message.201'),
  202: i18n.t('message.202'),
  204: i18n.t('message.204'),
  400: i18n.t('message.400'),
  401: i18n.t('message.401'),
  403: i18n.t('message.403'),
  404: i18n.t('message.404'),
  406: i18n.t('message.406'),
  410: i18n.t('message.410'),
  413: i18n.t('message.413'),
  422: i18n.t('message.422'),
  500: i18n.t('message.500'),
  502: i18n.t('message.502'),
  503: i18n.t('message.503'),
  504: i18n.t('message.504'),
};

export type ResultCode =
  | 200
  | 201
  | 202
  | 204
  | 400
  | 401
  | 403
  | 404
  | 406
  | 410
  | 413
  | 422
  | 500
  | 502
  | 503
  | 504;

// 获取授权token
const getAuthorization = (): string => {
  return localStorage.getItem(Authorization) || '';
};

// 重定向到登录页
const redirectToLogin = (): void => {
  localStorage.removeItem(Authorization);
  window.location.href = '/login';
};

// 转换对象键为snake_case
const convertTheKeysOfTheObjectToSnake = (obj: any): any => {
  if (!obj || typeof obj !== 'object') return obj;

  if (Array.isArray(obj)) {
    return obj.map(convertTheKeysOfTheObjectToSnake);
  }

  const result: any = {};
  Object.keys(obj).forEach(key => {
    const snakeKey = key.replace(/[A-Z]/g, letter => `_${letter.toLowerCase()}`);
    result[snakeKey] = convertTheKeysOfTheObjectToSnake(obj[key]);
  });

  return result;
};

// 创建axios实例
const request: AxiosInstance = axios.create({
  baseURL: import.meta.env.VITE_API_BASE_URL,
  timeout: 300000,
  headers: {
    'Content-Type': 'application/json',
  },
});

// 请求拦截器
request.interceptors.request.use(
  (config: InternalAxiosRequestConfig) => {
    // 转换数据格式 - 跳过FormData对象
    if (config.data && !(config.data instanceof FormData)) {
      config.data = convertTheKeysOfTheObjectToSnake(config.data);
    }
    if (config.params) {
      config.params = convertTheKeysOfTheObjectToSnake(config.params);
    }

    // 对于FormData，删除默认的Content-Type让浏览器自动设置
    if (config.data instanceof FormData) {
      delete config.headers['Content-Type'];
    }

    // 添加授权头
    const authorization = getAuthorization();
    if (authorization && !config.headers?.skipToken) {
      config.headers.Authorization = authorization;
    }

    return config;
  },
  (error) => {
    return Promise.reject(error);
  }
);

// 响应拦截器
request.interceptors.response.use(
  (response: AxiosResponse) => {
    const { status } = response;

    // 处理特定状态码
    if (status === 413 || status === 504) {
      snackbar.error(RetcodeMessage[status as ResultCode]);
    }

    // 处理blob类型响应
    if (response.config.responseType === 'blob') {
      return response;
    }
    console.log('interceptors.response ------ response', response);
    const data: ResponseType = response.data;

    // 处理业务错误码
    if (data?.code === 100) {
      snackbar.error(data?.message);
    } else if (data?.code === 401) {
      notification.error(data?.message);
      redirectToLogin();
    } else if (data?.code !== 0) {
      notification.error(`${i18n.t('message.hint')} : ${data?.code}`, data?.message);
    }

    return response;
  },
  (error) => {
    // 处理网络错误
    if (error.message === FAILED_TO_FETCH || !error.response) {
      notification.error(i18n.t('message.networkAnomaly'), i18n.t('message.networkAnomalyDescription'));
    } else if (error.response) {
      const { status, statusText } = error.response;
      const errorText = RetcodeMessage[status as ResultCode] || statusText;
      notification.error(`${i18n.t('message.requestError')} ${status}`, errorText);
    }

    return Promise.reject(error);
  }
);

export default request;

// 便捷方法
export const get = (url: string, config?: AxiosRequestConfig) => {
  return request.get(url, config);
};

export const post = (url: string, data?: any, config?: AxiosRequestConfig) => {
  return request.post(url, data, config);
};

export const put = (url: string, data?: any, config?: AxiosRequestConfig) => {
  return request.put(url, data, config);
};

export const del = (url: string, config?: AxiosRequestConfig) => {
  return request.delete(url, config);
};