/**
 * Soul创业派对 - 代付详情页
 * 改造后：发起人支付，好友领取。支持单页模式引导、登录检测。
 */
const app = getApp()

Page({
  data: {
    statusBarHeight: 44,
    requestSn: '',
    sectionId: '',
    detail: null,
    loading: true,
    paying: false,
    redeeming: false,
    isInitiator: false,
    requesterMsg: '',
    amountDisplay: '0.00',
    isSinglePageMode: false,
    showLoginModal: false,
    agreeProtocol: false,
    // 创建态
    isCreateMode: false,
    giftQuantity: 1,
    unitPrice: 0
  },

  onLoad(options) {
    wx.showShareMenu({ menus: ['shareAppMessage', 'shareTimeline'] })
    this.setData({ statusBarHeight: app.globalData.statusBarHeight || 44 })
    if (options?.ref || options?.referralCode) {
      app.handleReferralCode({ query: { ref: options.ref || options.referralCode } })
    }
    const requestSn = (options.requestSn || '').trim()
    const sectionId = (options.sectionId || '').trim()
    const isSinglePage = (wx.getSystemInfoSync?.()?.mode === 'singlePage') || app.globalData.isSinglePageMode
    this.setData({ requestSn, sectionId, isSinglePageMode: !!isSinglePage })
    if (requestSn || sectionId) {
      this.loadDetail()
    } else {
      wx.showToast({ title: '链接无效', icon: 'none' })
      setTimeout(() => wx.switchTab({ url: '/pages/index/index' }), 1500)
    }
  },

  async loadDetail() {
    const { requestSn, sectionId } = this.data
    this.setData({ loading: true })
    const userId = app.globalData.userInfo?.id || ''
    let url = ''
    if (requestSn) {
      url = `/api/miniprogram/gift-pay/detail?requestSn=${encodeURIComponent(requestSn)}${userId ? '&userId=' + encodeURIComponent(userId) : ''}`
    } else if (sectionId && userId) {
      url = `/api/miniprogram/gift-pay/detail?sectionId=${encodeURIComponent(sectionId)}&userId=${encodeURIComponent(userId)}`
    } else if (sectionId) {
      this.setData({ loading: false })
      wx.showToast({ title: '请先登录', icon: 'none' })
      return
    } else {
      this.setData({ loading: false })
      return
    }
    try {
      const res = await app.request(url)
      if (res && res.success) {
        const isCreateMode = res.mode === 'create' || res.action === 'create'
        const isInitiator = res.isInitiator === true
        let requesterMsg = ''
        let amountDisplay = '0.00'
        if (isCreateMode) {
          requesterMsg = '输入发放数量，支付后分享给好友免费领取'
          amountDisplay = (res.unitPrice != null ? Number(res.unitPrice) * (this.data.giftQuantity || 1) : 0).toFixed(2)
        } else {
          requesterMsg = isInitiator
            ? (res.action === 'pay' ? '支付后分享给好友，好友打开即可免费领取。' : '分享给好友，好友打开即可免费领取。')
            : res.initiatorMsg || `" 请帮我代付「${res.sectionTitle || res.description || '该商品'}」，非常感谢！ "`
          amountDisplay = (res.amount != null && res.amount !== '') ? Number(res.amount).toFixed(2) : '0.00'
        }
        this.setData({
          detail: res,
          loading: false,
          isInitiator,
          isCreateMode,
          requesterMsg,
          amountDisplay,
          unitPrice: res.unitPrice != null ? res.unitPrice : 0
        })
        if (isCreateMode) this._updateAmountDisplay()
      } else {
        this.setData({ loading: false })
        wx.showToast({ title: res?.error || '加载失败', icon: 'none' })
      }
    } catch (e) {
      this.setData({ loading: false })
      wx.showToast({ title: '加载失败', icon: 'none' })
    }
  },

  onGiftQuantityInput(e) {
    const raw = (e.detail.value || '').trim()
    const v = parseInt(raw, 10)
    this.setData({ giftQuantity: isNaN(v) ? (raw === '' ? '' : this.data.giftQuantity) : v })
    this._updateAmountDisplay()
  },
  _updateAmountDisplay() {
    const { unitPrice, giftQuantity } = this.data
    const q = Math.max(0, parseInt(giftQuantity, 10) || 0)
    const amount = (unitPrice || 0) * q
    this.setData({ amountDisplay: amount.toFixed(2) })
  },

  // 发起人支付（改造后：我帮别人付款）
  async doInitiatorPay() {
    if (this.data.isSinglePageMode) {
      wx.showModal({
        title: '朋友圈单页',
        content: '当前为朋友圈单页，无法支付。请点击底部「前往小程序」进入完整版后再支付。',
        showCancel: false
      })
      return
    }
    const userId = app.globalData.userInfo?.id || ''
    if (!userId) {
      wx.showToast({ title: '请先登录后再支付', icon: 'none' })
      return
    }
    let openId = app.globalData.openId || wx.getStorageSync('openId')
    if (!openId) {
      wx.showLoading({ title: '获取支付凭证...', mask: true })
      openId = await app.getOpenId()
      wx.hideLoading()
    }
    if (!openId) {
      wx.showToast({ title: '请先登录', icon: 'none' })
      return
    }
    let { requestSn, sectionId, detail, giftQuantity, isCreateMode } = this.data
    if (!requestSn && isCreateMode && sectionId) {
      const q = parseInt(giftQuantity, 10)
      if (isNaN(q) || q !== Math.floor(q) || q < 1) {
        wx.showToast({ title: '发放份数须为正整数', icon: 'none' })
        return
      }
      const quantity = q
      wx.showLoading({ title: '创建中...', mask: true })
      try {
        const createRes = await app.request({
          url: '/api/miniprogram/gift-pay/create',
          method: 'POST',
          data: { userId, productType: 'section', productId: sectionId, quantity }
        })
        if (!createRes?.success || !createRes.requestSn) {
          throw new Error(createRes?.error || '创建失败')
        }
        requestSn = createRes.requestSn
        this.setData({ requestSn, isCreateMode: false })
      } catch (e) {
        wx.hideLoading()
        wx.showToast({ title: e.message || e.error || '创建失败', icon: 'none' })
        return
      }
    }
    if (!requestSn) return

    this.setData({ paying: true })
    wx.showLoading({ title: '创建订单中...', mask: true })
    try {
      const res = await app.request({
        url: '/api/miniprogram/gift-pay/initiator-pay',
        method: 'POST',
        data: {
          requestSn,
          openId,
          userId
        }
      })
      wx.hideLoading()
      if (!res || !res.success || !res.data?.payParams) {
        throw new Error(res?.error || '创建订单失败')
      }
      const payParams = res.data.payParams
      const orderSn = res.data.orderSn
      // 与正常章节支付一致：只传 5 个必需参数，不传 appId 等多余字段
      await new Promise((resolve, reject) => {
        wx.requestPayment({
          timeStamp: payParams.timeStamp,
          nonceStr: payParams.nonceStr,
          package: payParams.package,
          signType: payParams.signType || 'RSA',
          paySign: payParams.paySign,
          success: resolve,
          fail: reject
        })
      })
      wx.showToast({ title: '支付成功', icon: 'success' })
      this.setData({ paying: false })
      // 主动同步订单状态（与 read 页一致）
      if (orderSn) {
        try {
          await app.request(`/api/miniprogram/pay?orderSn=${encodeURIComponent(orderSn)}`, { silent: true })
        } catch (e) {
          console.warn('[GiftPay] 主动同步订单失败:', e)
        }
      }
      this.loadDetail()
    } catch (e) {
      this.setData({ paying: false })
      const msg = e.message || e.error || e.errMsg || '支付失败'
      if (e.errMsg && e.errMsg.includes('cancel')) {
        wx.showToast({ title: '已取消支付', icon: 'none' })
      } else {
        wx.showToast({ title: msg, icon: 'none', duration: 2500 })
      }
    }
  },

  // 好友领取（改造后：免费获得章节）
  async doRedeem() {
    if (this.data.isSinglePageMode) {
      wx.showModal({
        title: '朋友圈单页',
        content: '当前为朋友圈单页，无法登录领取。请点击底部「前往小程序」进入完整版后再领取。',
        showCancel: false
      })
      return
    }
    const userId = app.globalData.userInfo?.id
    if (!userId) {
      this.setData({ showLoginModal: true, agreeProtocol: false })
      return
    }
    await this._doRedeem()
  },

  async _doRedeem() {
    const { requestSn } = this.data
    const userId = app.globalData.userInfo?.id
    if (!requestSn || !userId) return

    this.setData({ redeeming: true })
    wx.showLoading({ title: '领取中...', mask: true })
    try {
      const res = await app.request({
        url: '/api/miniprogram/gift-pay/redeem',
        method: 'POST',
        data: { requestSn, userId }
      })
      wx.hideLoading()
      this.setData({ redeeming: false })
      if (res && res.success) {
        wx.showToast({ title: '领取成功', icon: 'success' })
        const mid = res.sectionMid || res.sectionId
        const q = mid ? `mid=${mid}` : `id=${res.sectionId || ''}`
        setTimeout(() => {
          wx.navigateTo({ url: `/pages/read/read?${q}` })
        }, 800)
      } else {
        wx.showToast({ title: res?.error || '领取失败', icon: 'none' })
      }
    } catch (e) {
      this.setData({ redeeming: false })
      wx.hideLoading()
      wx.showToast({ title: e.message || e.error || '领取失败', icon: 'none' })
    }
  },

  closeLoginModal() {
    this.setData({ showLoginModal: false })
  },
  toggleAgree() {
    this.setData({ agreeProtocol: !this.data.agreeProtocol })
  },
  async handleWechatLogin() {
    if (!this.data.agreeProtocol) {
      wx.showToast({ title: '请先阅读并同意用户协议和隐私政策', icon: 'none' })
      return
    }
    try {
      const result = await app.login()
      if (!result) return
      this.setData({ showLoginModal: false, agreeProtocol: false })
      await this._doRedeem()
    } catch (e) {
      wx.showToast({ title: '登录失败', icon: 'none' })
    }
  },
  async handlePhoneLogin(e) {
    if (!e.detail.code) return this.handleWechatLogin()
    try {
      const result = await app.loginWithPhone(e.detail.code)
      if (!result) return
      this.setData({ showLoginModal: false })
      await this._doRedeem()
    } catch (e) {
      wx.showToast({ title: '登录失败', icon: 'none' })
    }
  },

  stopPropagation() {},
  openUserProtocol() {
    wx.navigateTo({ url: '/pages/agreement/agreement' })
  },
  openPrivacy() {
    wx.navigateTo({ url: '/pages/privacy/privacy' })
  },

  goBack() {
    app.goBackOrToHome()
  },

  goToInitiatorProfile() {
    const { detail } = this.data
    if (!detail?.initiatorUserId) return
    wx.navigateTo({ url: `/pages/member-detail/member-detail?id=${detail.initiatorUserId}` })
  },

  goToArticle() {
    const { detail } = this.data
    if (!detail || detail.productType !== 'section' || !detail.productId) return
    const mid = detail.productMid
    const q = mid ? `mid=${mid}` : `id=${detail.productId}`
    wx.navigateTo({ url: `/pages/read/read?${q}` })
  },

  onShareAppMessage() {
    const { requestSn } = this.data
    const ref = app.getMyReferralCode?.() || app.globalData.userInfo?.referralCode || ''
    let path = '/pages/gift-pay/detail'
    const params = []
    if (requestSn) params.push(`requestSn=${encodeURIComponent(requestSn)}`)
    if (ref) params.push(`ref=${encodeURIComponent(ref)}`)
    if (params.length) path += '?' + params.join('&')
    return {
      title: '好友送你一篇好文 - Soul创业派对',
      path
    }
  },

  onShareTimeline() {
    const { requestSn } = this.data
    const ref = app.getMyReferralCode?.() || app.globalData.userInfo?.referralCode || ''
    const params = []
    if (requestSn) params.push(`requestSn=${encodeURIComponent(requestSn)}`)
    if (ref) params.push(`ref=${encodeURIComponent(ref)}`)
    return {
      title: '好友送你一篇好文 - Soul创业派对',
      query: params.length ? params.join('&') : ''
    }
  }
})