const { getLayout } = require('../../utils/layout');
const { api } = require('../../utils/request');

function formatBytes(bytes) {
  bytes = bytes || 0;
  if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB';
  if (bytes < 1024 * 1024 * 1024) return (bytes / 1024 / 1024).toFixed(1) + ' MB';
  return (bytes / 1024 / 1024 / 1024).toFixed(2) + ' GB';
}

Page({
  onResize: function () { this.setData(getLayout()); },

  data: {
    loading: true,
    error: false,
    usedBytes: 0,
    usedText: '0 MB',
    freeMb: 200,
    freeText: '200 MB',
    percent: 0,
    overQuota: false,
    isVip: false,
    vipExpireText: '',
    plans: [],
    paying: false,
  },

  onLoad: function () { this.setData(getLayout()); },
  onShow: function () { this.loadInfo(); },
  onPullDownRefresh: function () { this.loadInfo().then(function () { wx.stopPullDownRefresh(); }); },

  loadInfo: function () {
    var self = this;
    this.setData({ loading: true, error: false });
    return api.storageInfo().then(function (d) {
      var freeBytes = d.free_bytes || d.freeBytes || 0;
      var usedBytes = d.used_bytes || d.usedBytes || 0;
      var percent = freeBytes > 0 ? Math.min(100, Math.round(usedBytes / freeBytes * 100)) : 0;
      var overQuota = usedBytes > freeBytes;
      var plans = (d.plans || []).map(function (p) {
        var cents = p.price_cents || p.priceCents || 0;
        return {
          key: p.key,
          name: p.name,
          priceText: (cents / 100).toFixed(cents % 100 === 0 ? 0 : 1),
          unit: p.key === 'year' ? '年' : '月',
          productId: p.product_id || p.productId,
        };
      });
      var vipExpireText = '';
      if (d.is_vip || d.isVip) {
        var expire = d.vip_expire_at || d.vipExpireAt ? String(d.vip_expire_at || d.vipExpireAt).slice(0, 10) : '';
        vipExpireText = expire ? ('有效期至 ' + expire) : '已开通无限空间';
      }
      self.setData({
        loading: false,
        usedBytes: usedBytes,
        usedText: formatBytes(usedBytes),
        freeMb: d.free_mb || d.freeMb || 200,
        freeText: formatBytes(freeBytes),
        percent: percent,
        overQuota: overQuota,
        isVip: !!(d.is_vip || d.isVip),
        vipExpireText: vipExpireText,
        plans: plans,
      });
    }).catch(function (e) {
      self.setData({ loading: false, error: true });
      console.error('加载存储信息失败', e);
    });
  },

  buyPlan: function (e) {
    var key = e.currentTarget.dataset.key;
    var self = this;
    if (this.data.paying) return;
    var plan = null;
    for (var i = 0; i < this.data.plans.length; i++) {
      if (this.data.plans[i].key === key) { plan = this.data.plans[i]; break; }
    }
    if (!plan) return;

    wx.showLoading({ title: '下单中...', mask: true });
    this.setData({ paying: true });
    api.storageCreateOrder({ plan_key: key }).then(function (order) {
      wx.hideLoading();
      if (!order || !(order.sign_data || order.signData)) {
        self.setData({ paying: false });
        wx.showToast({ title: '下单失败', icon: 'none' });
        return;
      }
      self.callVirtualPay(order);
    }).catch(function (err) {
      wx.hideLoading();
      self.setData({ paying: false });
      wx.showToast({ title: (err && err.error) || '下单失败', icon: 'none' });
    });
  },

  callVirtualPay: function (order) {
    var self = this;
    if (!wx.requestVirtualPayment) {
      this.setData({ paying: false });
      wx.showModal({
        title: '版本过低',
        content: '请升级微信至最新版本后再试。',
        showCancel: false
      });
      return;
    }
    // wx.requestVirtualPayment 仅接受 signData / paySig / signature / mode 四个参数；
    // offerId、env、productId、goodsPrice 等均已编码在 signData JSON 字符串内，不可再平铺为顶层参数。
    wx.requestVirtualPayment({
      signData: order.sign_data || order.signData,
      paySig: order.pay_sig || order.paySig,
      signature: order.signature,
      mode: order.mode || 'short_series_goods',
      success: function () {
        self.setData({ paying: false });
        wx.showToast({ title: '支付成功', icon: 'success' });
        setTimeout(function () { self.loadInfo(); }, 1200);
      },
      fail: function (err) {
        self.setData({ paying: false });
        var msg = '支付未完成';
        var m = (err && err.errMsg) || '';
        if (m.indexOf('cancel') >= 0) msg = '已取消支付';
        else if (m.indexOf('fail') >= 0) msg = '支付失败，请稍后重试';
        wx.showToast({ title: msg, icon: 'none' });
      }
    });
  },
});