const { getApiBaseUrl } = require('./constants')

function isPublicRequest(url) {
  return url === '/auth/wx-login' || url === '/auth/public-config'
}

function normalizeError(message, detail) {
  const error = new Error(message)
  error.detail = detail
  return error
}

function getFieldLabel(field) {
  const labels = {
    nickname: '昵称',
    real_name: '真实姓名',
    gender: '性别',
    birth_year: '出生年份',
    city: '所在城市',
    height: '身高',
    education: '学历',
    job_industry: '行业',
    job_company: '公司',
    income_range: '收入范围',
    personality_tags: '性格标签',
    hobbies: '兴趣爱好',
    wechat_id: '微信号',
    phone: '手机号',
    prefer_city: '期望城市',
    self_intro: '个人介绍',
  }
  return labels[field] || field
}

function normalizeFieldErrorMessage(item) {
  const fieldLabel = getFieldLabel(item.field)
  const message = item.message || '参数不合法'

  if (message.includes('at most') && message.includes('characters')) {
    const matched = message.match(/at most\s+(\d+)\s+characters/i)
    if (matched) {
      return `${fieldLabel}不能超过${matched[1]}个字符`
    }
  }

  if (message.includes('must be') && message.includes('list')) {
    return `${fieldLabel}必须是数组`
  }

  if (message.includes('array') || message.includes('list')) {
    return `${fieldLabel}必须是数组`
  }

  if (message.includes('string')) {
    return `${fieldLabel}格式不正确`
  }

  return `${fieldLabel}${message}`
}

function executeRequest(options, resolve, reject) {
  const app = getApp()
  const token = wx.getStorageSync('token')

  wx.request({
    url: `${getApiBaseUrl()}${options.url}`,
    method: options.method || 'GET',
    data: options.data || {},
    timeout: options.timeout || 10000,
    header: {
      'Content-Type': 'application/json',
      Authorization: token ? `Bearer ${token}` : ''
    },
    success(res) {
      if (res.statusCode === 401) {
        wx.removeStorageSync('token')
        wx.removeStorageSync('refresh_token')
        if (app && typeof app.ensureLogin === 'function' && !options._retry && !isPublicRequest(options.url)) {
          app.ensureLogin()
            .then(() => request({ ...options, _retry: true }).then(resolve).catch(reject))
            .catch((err) => {
              wx.showToast({ title: '登录已过期', icon: 'none' })
              reject(err || normalizeError('登录已过期'))
            })
          return
        }
        wx.showToast({ title: '登录已过期', icon: 'none' })
        reject(normalizeError('登录已过期'))
        return
      }
      if (!res.data || res.data.code !== 0) {
        const detail = res.data || {}
        const fieldErrors = detail?.data?.field_errors || []
        const fieldErrorMessage = fieldErrors.length > 0
          ? fieldErrors.map((item) => normalizeFieldErrorMessage(item)).join('；')
          : ''
        const message = fieldErrorMessage || detail.message || detail.detail || '请求失败'
        wx.showToast({ title: message.slice(0, 60), icon: 'none' })
        reject(normalizeError(message, detail))
        return
      }
      resolve(res.data.data)
    },
    fail(err) {
      const message = err && err.errMsg && err.errMsg.includes('url not in domain list')
        ? '域名未配置，请到后台系统设置修改'
        : '网络异常，请重试'
      wx.showToast({ title: message, icon: 'none' })
      reject(normalizeError(message, err))
    }
  })
}

function request(options) {
  return new Promise((resolve, reject) => {
    const app = getApp()
    if (!isPublicRequest(options.url) && app && typeof app.ensureLogin === 'function' && !wx.getStorageSync('token')) {
      app.ensureLogin()
        .then(() => executeRequest(options, resolve, reject))
        .catch((err) => reject(err))
      return
    }

    executeRequest(options, resolve, reject)
  })
}

module.exports = request