// pages/promoter/index/index.js
import { fetchPromoterInfo, fetchPromoterOrders, fetchPromoterQrcode } from '../../../services/promoter/fetchPromoter';
import { fetchConfig } from '../../../services/home/home';
import { withPromoter } from '../../../utils/promoter';

const PAGE_SIZE = 10;

Page({
  data: {
    // 推广概览：enabled 是否开启分佣、soft_ratio_percent 软件订单佣金比例(%)、
    // demand_ratio_percent 需求订单佣金比例(%)、invite_count 推广用户数、
    // order_count 推广订单数、settled_amount 累计已结算佣金(元)、pending_count 待结算订单数
    overview: {},
    overviewStatus: 'loading', // 概览加载状态 loading=加载中 success=成功 failed=失败
    overviewError: '', // 概览加载失败原因
    list: [], // 推广订单列表
    page: 1, // 下一次请求的页码
    hasMore: true, // 是否还有更多数据
    isEmpty: false, // 列表是否为空
    loadMoreStatus: 0, // 加载状态 0=空闲 1=加载中 2=没有更多 3=失败
    showQrcode: false, // 是否展示推广码弹窗
    qrcode: '', // 推广小程序码 data URL
    qrcodeLoading: false, // 推广码生成中
    saving: false, // 保存推广码中
    shareImage: '', // 分享卡片预览图（后台配置 site.promotion_share_image），为空时微信默认截取当前页
  },

  onLoad() {
    this.loadOverview();
    this.loadList(true);
    this.loadShareImage();
  },

  async loadShareImage() {
    try {
      const res = await fetchConfig();
      if (res.code === 1 && res.data?.promotion_share_image) {
        this.setData({ shareImage: res.data.promotion_share_image });
      }
    } catch (err) {
      console.error('loadShareImage failed:', err);
    }
  },

  async onPullDownRefresh() {
    await Promise.all([this.loadOverview(), this.loadList(true)]);
    wx.stopPullDownRefresh();
  },

  onReachBottom() {
    if (this.data.hasMore && this.data.loadMoreStatus !== 1) {
      this.loadList();
    }
  },

  onShareAppMessage() {
    const share = {
      title: '代码邦 - 软件商城与定制开发平台',
      path: withPromoter('/pages/home/home'),
    };
    if (this.data.shareImage) {
      share.imageUrl = this.data.shareImage;
    }
    return share;
  },

  async loadOverview() {
    try {
      const res = await fetchPromoterInfo();
      if (res.code !== 1) {
        this.setData({ overviewStatus: 'failed', overviewError: res.msg || '推广信息加载失败' });
        return;
      }
      this.setData({ overview: res.data, overviewStatus: 'success', overviewError: '' });
    } catch (err) {
      console.error('fetchPromoterInfo failed:', err);
      this.setData({ overviewStatus: 'failed', overviewError: '网络异常，请下拉刷新重试' });
    }
  },

  async loadList(fresh = false) {
    const page = fresh ? 1 : this.data.page;
    this.setData({ loadMoreStatus: 1 });
    try {
      const res = await fetchPromoterOrders({ page, pageSize: PAGE_SIZE });
      if (res.code !== 1) {
        this.setData({ loadMoreStatus: 3 });
        return;
      }
      const { data = [], current_page: currentPage, last_page: lastPage } = res.data;
      const list = fresh ? data : this.data.list.concat(data);
      const hasMore = currentPage < lastPage;
      this.setData({
        list,
        page: currentPage + 1,
        hasMore,
        isEmpty: list.length === 0,
        loadMoreStatus: hasMore ? 0 : 2,
      });
    } catch (err) {
      console.error('fetchPromoterOrders failed:', err);
      this.setData({ loadMoreStatus: 3 });
    }
  },

  onRetryLoad() {
    this.loadList();
  },

  async onShowQrcode() {
    this.setData({ showQrcode: true });
    if (this.data.qrcode || this.data.qrcodeLoading) {
      return;
    }
    this.setData({ qrcodeLoading: true });
    try {
      const res = await fetchPromoterQrcode({ envVersion: wx.$api.envVersion });
      if (res.code !== 1) {
        wx.showToast({ title: res.msg || '推广码生成失败', icon: 'none' });
        return;
      }
      this.setData({ qrcode: res.data.qrcode });
    } catch (err) {
      console.error('fetchPromoterQrcode failed:', err);
      wx.showToast({ title: '网络异常，请重试', icon: 'none' });
    } finally {
      this.setData({ qrcodeLoading: false });
    }
  },

  onQrcodeVisibleChange(e) {
    this.setData({ showQrcode: e.detail.visible });
  },

  onCloseQrcode() {
    this.setData({ showQrcode: false });
  },

  /** 保存推广码到相册：data URL 需先写入本地文件 */
  async onSaveQrcode() {
    const { qrcode, saving } = this.data;
    if (!qrcode || saving) {
      return;
    }
    this.setData({ saving: true });
    try {
      const [meta, base64] = qrcode.split(',');
      const ext = meta.indexOf('png') > -1 ? 'png' : 'jpg';
      const filePath = `${wx.env.USER_DATA_PATH}/promoter_qrcode.${ext}`;
      wx.getFileSystemManager().writeFileSync(filePath, base64, 'base64');
      await this.saveImage(filePath);
      wx.showToast({ title: '已保存到相册', icon: 'success' });
    } catch (err) {
      console.error('saveQrcode failed:', err);
      if (err && err.errMsg && err.errMsg.indexOf('auth') > -1) {
        this.guideAlbumSetting();
      } else if (!(err && err.errMsg && err.errMsg.indexOf('cancel') > -1)) {
        wx.showToast({ title: '保存失败，请重试', icon: 'none' });
      }
    } finally {
      this.setData({ saving: false });
    }
  },

  saveImage(filePath) {
    return new Promise((resolve, reject) => {
      wx.saveImageToPhotosAlbum({ filePath, success: resolve, fail: reject });
    });
  },

  guideAlbumSetting() {
    wx.showModal({
      title: '提示',
      content: '需要授权保存到相册，是否前往设置开启？',
      success: (res) => {
        if (res.confirm) {
          wx.openSetting();
        }
      },
    });
  },
});