// pages/detail/detail.js
const contentApi = require('../../api/content');
const chapterApi = require('../../api/chapter');
const bookshelfApi = require('../../api/bookshelf');
const userUtil = require('../../utils/user');

Page({
  data: {
    contentId: null,
    content: null,
    chapters: [],
    loading: true,
    contentType: null,
    inBookshelf: false,
    showChapterList: false
  },

  onLoad(options) {
    const contentId = parseInt(options.id);
    if (!contentId) {
      wx.showToast({
        title: '参数错误',
        icon: 'none'
      });
      setTimeout(() => {
        wx.navigateBack();
      }, 1500);
      return;
    }

    this.setData({ contentId });
    this.loadContentDetail();
  },

  // 加载内容详情
  async loadContentDetail() {
    try {
      const content = await contentApi.getContentDetail(this.data.contentId);
      this.setData({
        content,
        contentType: content.contentType
      });
      wx.setNavigationBarTitle({
        title: content.title
      });

      // 增加浏览量
      try {
        const viewData = await contentApi.increaseViewCount(this.data.contentId);
        if (viewData && typeof viewData.viewCount === 'number') {
          this.setData({
            'content.viewCount': viewData.viewCount
          });
        }
      } catch (error) {
        console.error('更新浏览量失败:', error);
      }
      
      // 加载详情后，再加载章节和检查书架状态
      this.loadChapters();
      this.checkBookshelfStatus();
    } catch (error) {
      wx.showToast({
        title: error || '加载失败',
        icon: 'none'
      });
    } finally {
      this.setData({ loading: false });
    }
  },

  // 加载章节列表
  async loadChapters() {
    try {
      let chapters = [];
      if (this.data.contentType === 1) {
        // 电子书章节
        chapters = await chapterApi.getBookChapterList(this.data.contentId);
      } else if (this.data.contentType === 2) {
        // 听书章节
        chapters = await chapterApi.getAudioChapterList(this.data.contentId);
      }
      this.setData({ chapters });
    } catch (error) {
      console.error('加载章节失败:', error);
      this.setData({ chapters: [] });
    }
  },

  // 检查书架状态
  async checkBookshelfStatus() {
    if (!userUtil.isLogin()) return;
    
    try {
      const userInfo = userUtil.getUserInfo();
      const isIn = await bookshelfApi.checkInBookshelf(userInfo.userId, this.data.contentId);
      this.setData({ inBookshelf: isIn });
    } catch (error) {
      console.error('检查书架状态失败:', error);
    }
  },

  // 加入/移出书架
  async toggleBookshelf() {
    if (!userUtil.isLogin()) {
      wx.showToast({
        title: '请先登录',
        icon: 'none'
      });
      setTimeout(() => {
        wx.reLaunch({
          url: '/pages/login/login'
        });
      }, 1500);
      return;
    }

    try {
      const userInfo = userUtil.getUserInfo();
      const { contentId, inBookshelf } = this.data;
      
      if (inBookshelf) {
        // 移出书架
        await bookshelfApi.removeFromBookshelf(userInfo.userId, contentId);
        this.setData({ inBookshelf: false });
        wx.showToast({
          title: '已移出书架',
          icon: 'success'
        });
      } else {
        // 加入书架
        await bookshelfApi.addToBookshelf(userInfo.userId, contentId);
        this.setData({ inBookshelf: true });
        wx.showToast({
          title: '已加入书架',
          icon: 'success'
        });
      }
    } catch (error) {
      wx.showToast({
        title: error || '操作失败',
        icon: 'none'
      });
    }
  },

  // 开始阅读/听书
  startRead() {
    if (!userUtil.isLogin()) {
      wx.showToast({
        title: '请先登录',
        icon: 'none'
      });
      setTimeout(() => {
        wx.reLaunch({
          url: '/pages/login/login'
        });
      }, 1500);
      return;
    }

    const { contentType, contentId } = this.data;
    
    if (contentType === 1) {
      // 电子书
      if (this.data.chapters.length === 0) {
        wx.showToast({
          title: '暂无章节',
          icon: 'none'
        });
        return;
      }
      // 跳转到阅读页，默认第一章
      const firstChapter = this.data.chapters[0];
      wx.navigateTo({
        url: `/pages/read/read?contentId=${contentId}&chapterId=${firstChapter.chapterId}`
      });
    } else if (contentType === 2) {
      // 听书
      if (this.data.chapters.length === 0) {
        wx.showToast({
          title: '暂无章节',
          icon: 'none'
        });
        return;
      }
      // 跳转到听书页，默认第一章
      const firstChapter = this.data.chapters[0];
      wx.navigateTo({
        url: `/pages/audio/audio?contentId=${contentId}&audioId=${firstChapter.audioId}`
      });
    }
  },

  // 显示/隐藏章节列表
  toggleChapterList() {
    this.setData({
      showChapterList: !this.data.showChapterList
    });
  },

  // 选择章节
  selectChapter(e) {
    const index = e.currentTarget.dataset.index;
    const chapter = this.data.chapters[index];
    const { contentType, contentId } = this.data;
    
    this.setData({ showChapterList: false });
    
    if (contentType === 1) {
      wx.navigateTo({
        url: `/pages/read/read?contentId=${contentId}&chapterId=${chapter.chapterId}`
      });
    } else if (contentType === 2) {
      wx.navigateTo({
        url: `/pages/audio/audio?contentId=${contentId}&audioId=${chapter.audioId}`
      });
    }
  },

  // 封面加载错误
  onCoverError(e) {
    console.error('封面加载失败:', e);
  }
});