import config from '../config.js'

const BASE_URL = config.API_BASE_URL
var _dedupMap = {}
var DEDUP_WINDOW_MS = 3000

function _makeDedupKey(method, url, body) {
  var bodyStr = ''
  try { bodyStr = JSON.stringify(body || {}) } catch (e) { bodyStr = '' }
  return method + '|' + url + '|' + bodyStr
}

function _tryDedup(method, fullUrl, body) {
  var key = _makeDedupKey(method, fullUrl, body)
  var cached = _dedupMap[key]
  if (cached && Date.now() - cached.ts < DEDUP_WINDOW_MS) {
    return cached.promise
  }
  return null
}

function _registerDedup(method, fullUrl, body, promise) {
  var key = _makeDedupKey(method, fullUrl, body)
  _dedupMap[key] = { promise: promise, ts: Date.now() }
  var _cleanup = function() {
    setTimeout(function() {
      if (_dedupMap[key] && _dedupMap[key].promise === promise) {
        delete _dedupMap[key]
      }
    }, DEDUP_WINDOW_MS)
  }
  promise.then(_cleanup, _cleanup)
}

function _clearDedup() {
  _dedupMap = {}
}
export { _clearDedup as clearApiDedup }

function request(url, method = 'POST', data = {}, options = {}) {
  var fullUrl = BASE_URL + url
  const token = uni.getStorageSync('token')
  var key = _makeDedupKey(method, fullUrl, data)
  if (!options._skipDedup) {
    var cached = _tryDedup(method, fullUrl, data)
    if (cached) {
      return cached
    }
  }

  var _promise = new Promise((resolve, reject) => {
    uni.request({
      url: fullUrl,
      method: method,
      data: data,
      header: {
        'Content-Type': 'application/json',
        'Authorization': token ? 'Bearer ' + token : ''
      },
      success: function(res) {
        if (res.statusCode === 401) {
          uni.login({
            provider: 'weixin',
            success: function(loginRes) {
              if (loginRes && loginRes.code) {
                silentLogin(loginRes.code).then(function(sr) {
                  if (sr && sr.data && sr.data.token) {
                    uni.setStorageSync('token', sr.data.token)
                    uni.setStorageSync('openid', sr.data.openid)
                    resolve(sr.data)
                  } else {
                    uni.showToast({ title: '登录已过期，请重新进入', icon: 'none' })
                    reject(res.data)
                  }
                })
              }
            }
          })
          return
        }
        if (res.data && res.data.code === 200) {
          resolve(res.data)
        } else {
          var msg = res.data && res.data.message ? res.data.message : '请求失败'
          uni.showToast({ title: msg, icon: 'none' })
          reject(res.data)
        }
      },
      fail: function(err) {
        console.error('[API] 网络错误 ' + method + ' ' + fullUrl, err)
        uni.showToast({ title: '网络请求失败', icon: 'none' })
        reject(err)
      }
    })
  })

  if (!options._skipDedup) {
    _registerDedup(method, fullUrl, data, _promise)
  }

  return _promise
}

// ===== 认证 =====
export const silentLogin = (code, options) => {
  return request('/api/auth/silent-login', 'POST', { code }, options || {})
}

export const wechatLogin = (code, userInfo) => {
  return request('/api/auth/wechat-login', 'POST', { code, nickname: userInfo.nickname, avatar: userInfo.avatar })
}

export const getUserInfo = () => {
  return request('/api/user/info', 'POST', {})
}

// ===== 减脂专题 API =====
// 体重
export const getWeightList = (memberId, startDate, endDate) => {
  var data = {}
  if (memberId) data.memberId = memberId
  if (startDate) data.startDate = startDate
  if (endDate) data.endDate = endDate
  return request('/api/fatloss/weight/list', 'POST', data)
}

export const createWeightRecord = (data) => {
  return request('/api/fatloss/weight/create', 'POST', data)
}

export const updateWeightRecord = (data) => {
  return request('/api/fatloss/weight/update', 'POST', data)
}

export const deleteWeightRecord = (id) => {
  return request('/api/fatloss/weight/delete', 'POST', { id: id })
}

// 饮食
export const getDietList = (memberId, startDate, endDate) => {
  var data = {}
  if (memberId) data.memberId = memberId
  if (startDate) data.startDate = startDate
  if (endDate) data.endDate = endDate
  return request('/api/fatloss/diet/list', 'POST', data)
}

export const createDietRecord = (data) => {
  return request('/api/fatloss/diet/create', 'POST', data)
}

export const deleteDietRecord = (id) => {
  return request('/api/fatloss/diet/delete', 'POST', { id: id })
}

export const getCaloriesSummary = (date) => {
  var data = {}
  if (date) data.date = date
  return request('/api/fatloss/diet/calories-summary', 'POST', data)
}

// 运动
export const getExerciseList = (memberId, startDate, endDate) => {
  var data = {}
  if (memberId) data.memberId = memberId
  if (startDate) data.startDate = startDate
  if (endDate) data.endDate = endDate
  return request('/api/fatloss/exercise/list', 'POST', data)
}

export const createExerciseRecord = (data) => {
  return request('/api/fatloss/exercise/create', 'POST', data)
}

export const deleteExerciseRecord = (id) => {
  return request('/api/fatloss/exercise/delete', 'POST', { id: id })
}

// 目标
export const getActiveGoal = () => {
  return request('/api/fatloss/goal/active', 'POST', {})
}

export const createGoal = (data) => {
  return request('/api/fatloss/goal/create', 'POST', data)
}

export const updateGoal = (data) => {
  return request('/api/fatloss/goal/update', 'POST', data)
}

export const completeGoal = (id) => {
  return request('/api/fatloss/goal/complete', 'POST', { id: id })
}

export const abandonGoal = (id) => {
  return request('/api/fatloss/goal/abandon', 'POST', { id: id })
}

// ===== AI 教练（走主系统 AiGateway） =====
export const aiCoachSend = (data) => {
  return request('/api/ai/health-coach/send', 'POST', data)
}