import axios from 'axios'
import { formatDate } from './tools'


class Http {
  constructor() {
    this.config = {}

    this.store = null
  }

  init(config, store) {

    this.config = { timeout: 300000, ...config }
    this.store = store
  }

  baseUrl() {
    return this.config.apiUrl
  }

  ImgSrc(src) {
    return this.baseUrl() + src
  }

  getHttpInstance(config) {

    console.log('getHttpInstance', this.baseUrl())
    let defaultConfig = {
      timeout: this.config.timeout,
      headers: {},
      baseURL: this.baseUrl(),
      responseType: 'json'
      // 移除 transformResponse，使用 axios 默认的 JSON 解析
    }
    let newConfig = Object.assign({}, defaultConfig, config)

    if (this.store && this.store.state.user) {
      newConfig.headers['admin-token'] = this.store.state.user.token
    }

    let instance = axios.create(newConfig)

    instance.interceptors.request.use(
      config => {
        return config
      },
      error => {
        return Promise.reject(error)
      }
    )

    instance.interceptors.response.use(
      response => {
        if (response.status === 200) {
          if (response.data && response.data.code === 0) {
            return response
          } else {
            this.hideLoad()
            let msg = response.data.message
            this.showError(msg)
            return Promise.reject(msg)
          }
        } else {
          this.hideLoad()
          return Promise.reject(response)
        }
      },
      error => {
        this.hideLoad()

        if (error && error.response && error.response.status === 401) {
          if (this.store) {
            this.store.commit('user/setToken', '')
            // 使用 store 中的 router 实例跳转
            if (window.framework && window.framework.router) {
              window.framework.router.push({ path: '/login' })
            }
          }
          return Promise.reject(error)
        }

        let msg = error.message
        if (msg.indexOf('Network Error') > -1) {
          msg = '网络错误，请刷新后重试'
        } else if (msg.indexOf('timeout of') > -1) {
          msg = '请求超时，请稍后后重试'
        }
        this.showError(msg)
        return Promise.reject(error)
      }
    )

    return instance
  }

  showLoad() {
    let loadWarp = document.getElementById('spin-box-one')
    if (loadWarp) {
      loadWarp.style.display = 'block'
    }
  }

  hideLoad() {
    let loadWarp = document.getElementById('spin-box-one')
    if (loadWarp) {
      loadWarp.style.display = 'none'
    }
  }

  showError(msg) {
    // 使用框架存储的 ViewUI 实例
    if (window.framework && window.framework.ViewUI && window.framework.ViewUI.Message) {
      window.framework.ViewUI.Message.error({ content: msg, duration: 3 })
    } else if (window.$Message) {
      window.$Message.error({ content: msg, duration: 3 })
    } else {
      console.error(msg)
    }
  }

  formatParamete(param) {
    param = param || {}

    if (param) {
      for (let key in param) {
        if (param[key] && param[key].getFullYear) {
          param[key] = formatDate(param[key], 'YYYY-MM-DD HH:mm:ss')
        }
      }
    }

    param = JSON.parse(JSON.stringify(param))
    return param
  }

  formatFormDataParam(param) {
    let formData = new FormData()
    Object.keys(param).forEach(key => {
      formData.append(key, param[key])
    })
    return formData
  }

  async get(url, param, config) {
    let instance = this.getHttpInstance()
    param = this.formatParamete(param)
    let promise = new Promise((resolve, reject) => {
      if (!config || !config.hideLoad) {
        this.showLoad()
      }

      instance.get(url, { params: param }).then(async response => {
        this.hideLoad()
        resolve(response.data)
      }).catch(error => {
        reject(error)
      })
    })

    return promise
  }

  async postFormData(url, data) {
    let instance = this.getHttpInstance({
      headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
    })
    let param = this.formatFormDataParam(data)
    let promise = new Promise((resolve, reject) => {
      instance.post(url, param).then(response => {
        this.hideLoad()
        resolve(response.data)
      }).catch(error => {
        reject(error)
      })
    })
    return promise
  }

  async post(url, param, config) {
    let instance = this.getHttpInstance(config)
    param = this.formatParamete(param)

    let promise = new Promise((resolve, reject) => {
      this.showLoad()
      instance.post(url, param).then(response => {
        this.hideLoad()
        resolve(response.data)
      }).catch(error => {
        reject(error)
      })
    })

    return promise
  }

  async fileExport(url, param, filename, is_down = true) {
    let formData = this.formatFormDataParam(param)

    let config = {
      headers: {
        'admin-token': this.store ? this.store.state.user.token : '',
        'Content-Type': 'application/json'
      },
      baseURL: this.baseUrl(),
      url: url,
      responseType: 'blob'
    }

    let res = await axios.post(url, formData, config)
    // 直接下载
    if (is_down) {
      window.framework.uiTool.downloadFile(res.data, filename)
    }

    return res
  }
}

const http = new Http()

export default http