import request from '@/utils/request.js'
import API from '@/api/config.js'
import { getUA } from '@/utils/util.js'
import { getUser } from '@/utils/auth.js'

let lastReportKey = ''
let lastReportAt = 0

function stringifyQuery(query = {}) {
  return Object.keys(query)
    .filter(key => query[key] !== undefined && query[key] !== null && query[key] !== '')
    .map(key => `${encodeURIComponent(key)}=${encodeURIComponent(query[key])}`)
    .join('&')
}

function getCurrentPageInfo() {
  const pages = getCurrentPages()
  const page = pages[pages.length - 1]
  if (!page) return null

  const route = page.route || ''
  const query = page.options || {}
  const queryString = stringifyQuery(query)
  const path = route ? `/${route}` : '/'
  const url = queryString ? `${path}?${queryString}` : path

  return {
    route,
    path,
    url
  }
}

export function reportPagePv(extra = {}) {
  const page = getCurrentPageInfo()
  if (!page) return

  const now = Date.now()
  const key = extra.key ? `${page.url}::${extra.key}` : page.url
  if (key === lastReportKey && now - lastReportAt < 800) return
  lastReportKey = key
  lastReportAt = now

  const user = getUser() || {}
  const referrer = uni.getStorageSync('pvcv_last_url') || ''
  uni.setStorageSync('pvcv_last_url', page.url)

  request({
    url: API.INTERFACE_PVCV_ADD,
    method: 'POST',
    params: {
      source: uni.getStorageSync('source') || '',
      referrer,
      url: page.url,
      path: page.path,
      page_key: page.route,
      user_id: user.user_id || 0,
      user_agent: getUA(),
      ...extra
    }
  }).catch(() => {
    // 统计失败不能影响页面主流程
  })
}

export function reportCv(key, extra = {}) {
  if (!key) return
  reportPagePv({
    ...extra,
    key
  })
}