/**
 * Soul创业派对 - 用户旅程规则引擎
 * 在关键页面自动检查用户状态，引导完善信息
 * 
 * 规则逻辑：
 * 1. 注册后 → 引导填写头像和昵称
 * 2. 浏览付费章节 → 引导绑定手机号
 * 3. 完成匹配 → 引导填写 MBTI / 行业等
 * 4. 购买全书 → 引导填写完整信息（进 VIP 群）
 * 5. 累计浏览 5 章 → 引导分享推广
 */

const app = getApp()

const RULE_COOLDOWN_KEY = 'rule_engine_cooldown'
const COOLDOWN_MS = 60 * 1000

function isInCooldown(ruleId) {
  try {
    const map = wx.getStorageSync(RULE_COOLDOWN_KEY) || {}
    const ts = map[ruleId]
    if (!ts) return false
    return Date.now() - ts < COOLDOWN_MS
  } catch { return false }
}

function setCooldown(ruleId) {
  try {
    const map = wx.getStorageSync(RULE_COOLDOWN_KEY) || {}
    map[ruleId] = Date.now()
    wx.setStorageSync(RULE_COOLDOWN_KEY, map)
  } catch {}
}

function getUserInfo() {
  return app.globalData.userInfo || {}
}

function checkRule_FillAvatar() {
  const user = getUserInfo()
  if (!user.id) return null
  const avatar = user.avatar || user.avatarUrl || ''
  const nickname = user.nickname || ''
  if (avatar && !avatar.includes('default') && nickname && nickname !== '微信用户' && !nickname.startsWith('微信用户')) {
    return null
  }
  if (isInCooldown('fill_avatar')) return null
  setCooldown('fill_avatar')
  return {
    ruleId: 'fill_avatar',
    title: '完善个人信息',
    message: '设置头像和昵称，让其他创业者更容易认识你',
    action: 'navigate',
    target: '/pages/profile-edit/profile-edit'
  }
}

function checkRule_BindPhone() {
  const user = getUserInfo()
  if (!user.id) return null
  if (user.phone) return null
  if (isInCooldown('bind_phone')) return null
  setCooldown('bind_phone')
  return {
    ruleId: 'bind_phone',
    title: '绑定手机号',
    message: '绑定手机号解锁更多功能，保障账户安全',
    action: 'bind_phone',
    target: null
  }
}

function checkRule_FillProfile() {
  const user = getUserInfo()
  if (!user.id) return null
  if (user.mbti && user.industry) return null
  if (isInCooldown('fill_profile')) return null
  setCooldown('fill_profile')
  return {
    ruleId: 'fill_profile',
    title: '完善创业档案',
    message: '填写 MBTI 和行业信息，帮你精准匹配创业伙伴',
    action: 'navigate',
    target: '/pages/profile-edit/profile-edit'
  }
}

function checkRule_ShareAfter5Chapters() {
  const user = getUserInfo()
  if (!user.id) return null
  const readCount = app.globalData.readCount || 0
  if (readCount < 5) return null
  if (isInCooldown('share_after_5')) return null
  setCooldown('share_after_5')
  return {
    ruleId: 'share_after_5',
    title: '邀请好友一起看',
    message: '你已阅读 ' + readCount + ' 个章节，分享给好友可获得分销收益',
    action: 'navigate',
    target: '/pages/referral/referral'
  }
}

/**
 * 在指定场景下检查规则
 * @param {string} scene - 场景：after_login, before_read, after_match, after_pay, page_show
 * @returns {object|null} - 触发的规则，null 表示无需触发
 */
function checkRules(scene) {
  const user = getUserInfo()
  if (!user.id) return null

  switch (scene) {
    case 'after_login':
      return checkRule_FillAvatar()
    case 'before_read':
      return checkRule_BindPhone() || checkRule_FillAvatar()
    case 'after_match':
      return checkRule_FillProfile()
    case 'after_pay':
      return checkRule_FillProfile()
    case 'page_show':
      return checkRule_FillAvatar() || checkRule_ShareAfter5Chapters()
    default:
      return null
  }
}

/**
 * 执行规则动作
 * @param {object} rule - checkRules 返回的规则对象
 * @param {object} pageInstance - 页面实例（用于绑定手机号等操作）
 */
function executeRule(rule, pageInstance) {
  if (!rule) return
  
  wx.showModal({
    title: rule.title,
    content: rule.message,
    confirmText: '去完善',
    cancelText: '稍后再说',
    success: (res) => {
      if (res.confirm) {
        if (rule.action === 'navigate' && rule.target) {
          wx.navigateTo({ url: rule.target })
        } else if (rule.action === 'bind_phone' && pageInstance) {
          if (typeof pageInstance.showPhoneBinding === 'function') {
            pageInstance.showPhoneBinding()
          }
        }
      }
      _trackRuleAction(rule.ruleId, res.confirm ? 'confirm' : 'cancel')
    }
  })
}

function _trackRuleAction(ruleId, action) {
  const userId = getUserInfo().id
  if (!userId) return
  app.request('/api/miniprogram/track', {
    method: 'POST',
    data: { userId, action: 'rule_trigger', target: ruleId, extraData: { result: action } },
    silent: true
  }).catch(() => {})
}

/**
 * 在页面 onShow 中调用的便捷方法
 * @param {string} scene
 * @param {object} pageInstance
 */
function checkAndExecute(scene, pageInstance) {
  const rule = checkRules(scene)
  if (rule) {
    setTimeout(() => executeRule(rule, pageInstance), 800)
  }
}

module.exports = { checkRules, executeRule, checkAndExecute }