/**
 * Soul创业派对 - 用户旅程规则引擎
 * 从后端 /api/miniprogram/user-rules 读取启用的规则，按场景触发引导
 * 稳定版兼容：readCount 用 getReadCount()，hasPurchasedFull 用 hasFullBook，完善头像跳 avatar-nickname
 *
 * trigger → scene 映射：
 *   注册           → after_login
 *   点击收费章节   → before_read
 *   完成匹配       → after_match
 *   完成付款       → after_pay
 *   累计浏览5章节  → page_show
 *   加入派对房     → before_join_party
 *   绑定微信       → after_bindwechat
 *   收益满50元     → earnings_check
 *   手动触发       → manual
 *   浏览导师页     → browse_mentor
 */

const app = getApp()

const RULE_COOLDOWN_KEY = 'rule_engine_cooldown'
const COOLDOWN_MS = 60 * 1000
let _cachedRules = null
let _cacheTs = 0
const CACHE_TTL = 5 * 60 * 1000

const TRIGGER_SCENE_MAP = {
  '注册': 'after_login',
  '点击收费章节': 'before_read',
  '完成匹配': 'after_match',
  '完成付款': 'after_pay',
  '累计浏览5章节': 'page_show',
  '加入派对房': 'before_join_party',
  '绑定微信': 'after_bindwechat',
  '收益满50元': 'earnings_check',
  '手动触发': 'manual',
  '浏览导师页': 'browse_mentor',
}

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 (e) {
    console.warn('[RuleEngine] 读取冷却状态失败:', e)
    return false
  }
}

function setCooldown(ruleId) {
  try {
    const map = wx.getStorageSync(RULE_COOLDOWN_KEY) || {}
    map[ruleId] = Date.now()
    wx.setStorageSync(RULE_COOLDOWN_KEY, map)
  } catch (e) {
    console.warn('[RuleEngine] 写入冷却状态失败:', e)
  }
}

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

async function loadRules() {
  if (_cachedRules && Date.now() - _cacheTs < CACHE_TTL) return _cachedRules
  try {
    const res = await app.request({ url: '/api/miniprogram/user-rules', method: 'GET', silent: true })
    if (res && res.success && res.rules) {
      _cachedRules = res.rules
      _cacheTs = Date.now()
      return _cachedRules
    }
  } catch (e) {
    console.warn('[RuleEngine] 加载规则失败，继续使用缓存:', e)
  }
  return _cachedRules || []
}

function isRuleEnabled(rules, triggerName) {
  return rules.some(r => r.trigger === triggerName)
}

function getRuleInfo(rules, triggerName) {
  return rules.find(r => r.trigger === triggerName)
}

// 稳定版：跳转 avatar-nickname（与 _ensureProfileCompletedAfterLogin 一致）
function checkRule_FillAvatar(rules) {
  if (!isRuleEnabled(rules, '注册')) return null
  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')
  const info = getRuleInfo(rules, '注册')
  return {
    ruleId: 'fill_avatar',
    title: info?.title || '完善个人信息',
    message: info?.description || '设置头像和昵称，让其他创业者更容易认识你',
    action: 'navigate',
    target: '/pages/avatar-nickname/avatar-nickname'
  }
}

function checkRule_BindPhone(rules) {
  if (!isRuleEnabled(rules, '点击收费章节')) return null
  const user = getUserInfo()
  if (!user.id) return null
  if (user.phone) return null
  if (isInCooldown('bind_phone')) return null
  setCooldown('bind_phone')
  const info = getRuleInfo(rules, '点击收费章节')
  return {
    ruleId: 'bind_phone',
    title: info?.title || '绑定手机号',
    message: info?.description || '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(rules) {
  if (!isRuleEnabled(rules, '完成匹配')) return null
  const user = getUserInfo()
  if (!user.id) return null
  if (user.mbti && user.industry) return null
  if (isInCooldown('fill_profile')) return null
  setCooldown('fill_profile')
  const info = getRuleInfo(rules, '完成匹配')
  return {
    ruleId: 'fill_profile',
    title: info?.title || '完善创业档案',
    message: info?.description || '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'
  }
}

// 稳定版兼容：readCount 用 getReadCount()
function checkRule_ShareAfter5Chapters(rules) {
  if (!isRuleEnabled(rules, '累计浏览5章节')) return null
  const user = getUserInfo()
  if (!user.id) return null
  const readCount = (typeof app.getReadCount === 'function' ? app.getReadCount() : (app.globalData.readCount || 0))
  if (readCount < 5) return null
  if (isInCooldown('share_after_5')) return null
  setCooldown('share_after_5')
  const info = getRuleInfo(rules, '累计浏览5章节')
  return {
    ruleId: 'share_after_5',
    title: info?.title || '邀请好友一起看',
    message: info?.description || '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'
  }
}

// 稳定版兼容：hasPurchasedFull 用 hasFullBook
function checkRule_FillVipInfo(rules) {
  if (!isRuleEnabled(rules, '完成付款')) return null
  const user = getUserInfo()
  if (!user.id) return null
  if (!(app.globalData.hasFullBook || app.globalData.hasPurchasedFull)) return null
  if (user.wechatId && user.address) return null
  if (isInCooldown('fill_vip_info')) return null
  setCooldown('fill_vip_info')
  const info = getRuleInfo(rules, '完成付款')
  return {
    ruleId: 'fill_vip_info',
    title: info?.title || '填写完整信息',
    message: info?.description || '购买全书后，需填写完整信息以进入 VIP 群',
    action: 'navigate',
    target: '/pages/profile-edit/profile-edit'
  }
}

function checkRule_JoinParty(rules) {
  if (!isRuleEnabled(rules, '加入派对房')) return null
  const user = getUserInfo()
  if (!user.id) return null
  if (user.projectIntro) return null
  if (isInCooldown('join_party')) return null
  setCooldown('join_party')
  const info = getRuleInfo(rules, '加入派对房')
  return {
    ruleId: 'join_party',
    title: info?.title || '填写项目介绍',
    message: info?.description || '进入派对房前，引导填写项目介绍和核心需求',
    action: 'navigate',
    target: '/pages/profile-edit/profile-edit'
  }
}

function checkRule_BindWechat(rules) {
  if (!isRuleEnabled(rules, '绑定微信')) return null
  const user = getUserInfo()
  if (!user.id) return null
  if (user.wechatId) return null
  if (isInCooldown('bind_wechat')) return null
  setCooldown('bind_wechat')
  const info = getRuleInfo(rules, '绑定微信')
  return {
    ruleId: 'bind_wechat',
    title: info?.title || '绑定微信号',
    message: info?.description || '绑定微信后，引导开启分销功能',
    action: 'navigate',
    target: '/pages/settings/settings'
  }
}

function checkRule_Withdraw(rules) {
  if (!isRuleEnabled(rules, '收益满50元')) return null
  const user = getUserInfo()
  if (!user.id) return null
  const earnings = app.globalData.totalEarnings || 0
  if (earnings < 50) return null
  if (isInCooldown('withdraw_50')) return null
  setCooldown('withdraw_50')
  const info = getRuleInfo(rules, '收益满50元')
  return {
    ruleId: 'withdraw_50',
    title: info?.title || '可以提现了',
    message: info?.description || '累计分销收益超过 50 元，快去申请提现吧',
    action: 'navigate',
    target: '/pages/referral/referral'
  }
}

function checkRulesSync(scene, rules) {
  const user = getUserInfo()
  if (!user.id) return null

  switch (scene) {
    case 'after_login':
      return checkRule_FillAvatar(rules)
    case 'before_read':
      return checkRule_BindPhone(rules) || checkRule_FillAvatar(rules)
    case 'after_match':
      return checkRule_FillProfile(rules) || checkRule_JoinParty(rules)
    case 'after_pay':
      return checkRule_FillVipInfo(rules) || checkRule_FillProfile(rules)
    case 'page_show':
      return checkRule_FillAvatar(rules) || checkRule_ShareAfter5Chapters(rules) || checkRule_BindWechat(rules) || checkRule_Withdraw(rules)
    case 'before_join_party':
      return checkRule_JoinParty(rules)
    default:
      return null
  }
}

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({
    url: '/api/miniprogram/track',
    method: 'POST',
    data: { userId, action: 'rule_trigger', target: ruleId, extraData: { result: action } },
    silent: true
  }).catch(() => {})
}

async function checkAndExecute(scene, pageInstance) {
  const rules = await loadRules()
  const rule = checkRulesSync(scene, rules)
  if (rule) {
    setTimeout(() => executeRule(rule, pageInstance), 800)
  }
}

module.exports = { checkRules: checkRulesSync, executeRule, checkAndExecute, loadRules }