// pages/article-list/article-list.js
// 文章列表逻辑处理

const app = getApp()
const api = require('../../services/api')

Page({
  data: {
    categoryId: null,
    tagId: null,
    keyword: '',
    articleList: [],
    categoryList: [],
    tagList: [],
    page: 1,
    pageSize: 10,
    hasMore: true,
    loading: false,
    selectedCategory: null,
    selectedTag: null,
    sortBy: 'createTime',
    sortOrder: 'desc'
  },

  onLoad(options) {
    if (options.categoryId) {
      this.setData({ categoryId: options.categoryId })
    }
    if (options.tagId) {
      this.setData({ tagId: options.tagId })
    }
    if (options.keyword) {
      this.setData({ keyword: options.keyword })
    }
    this.loadCategoryList()
    this.loadArticleList()
  },

  onPullDownRefresh() {
    this.setData({ page: 1, articleList: [], hasMore: true })
    this.loadArticleList()
    wx.stopPullDownRefresh()
  },

  onReachBottom() {
    if (this.data.hasMore && !this.data.loading) {
      this.setData({ page: this.data.page + 1 })
      this.loadArticleList()
    }
  },

  // 加载分类列表
  loadCategoryList() {
    api.getCategoryList().then(res => {
      if (res.code === 200) {
        this.setData({ categoryList: res.data || [] })
      }
    })
  },

  // 加载文章列表
  loadArticleList() {
    if (this.data.loading || !this.data.hasMore) return

    this.setData({ loading: true })

    const params = {
      page: this.data.page,
      pageSize: this.data.pageSize,
      sortBy: this.data.sortBy,
      sortOrder: this.data.sortOrder
    }

    if (this.data.categoryId) {
      params.categoryId = this.data.categoryId
    }
    if (this.data.tagId) {
      params.tagId = this.data.tagId
    }
    if (this.data.keyword) {
      params.keyword = this.data.keyword
    }

    api.getArticleList(params).then(res => {
      this.setData({ loading: false })
      if (res.code === 200) {
        const list = res.data.list || []
        this.setData({
          articleList: this.data.page === 1 ? list : this.data.articleList.concat(list),
          hasMore: list.length >= this.data.pageSize
        })
      }
    }).catch(() => {
      this.setData({ loading: false })
    })
  },

  // 跳转到文章详情
  goToDetail(e) {
    const articleId = e.currentTarget.dataset.id
    wx.navigateTo({
      url: `/pages/article-detail/article-detail?id=${articleId}`
    })
  },

  // 选择分类
  onCategoryChange(e) {
    const index = e.detail.value
    const category = this.data.categoryList[index]
    this.setData({
      selectedCategory: category,
      categoryId: category ? category.id : null,
      page: 1,
      articleList: [],
      hasMore: true
    })
    this.loadArticleList()
  },

  // 选择标签
  onTagChange(e) {
    const index = e.detail.value
    const tag = this.data.tagList[index]
    this.setData({
      selectedTag: tag,
      tagId: tag ? tag.id : null,
      page: 1,
      articleList: [],
      hasMore: true
    })
    this.loadArticleList()
  },

  // 排序方式变更
  onSortChange(e) {
    const value = e.detail.value
    const [sortBy, sortOrder] = value.split(':')
    this.setData({
      sortBy,
      sortOrder,
      page: 1,
      articleList: [],
      hasMore: true
    })
    this.loadArticleList()
  },

  // 收藏文章
  onFavorite(e) {
    if (!app.checkLogin()) return

    const articleId = e.currentTarget.dataset.id
    const articleList = this.data.articleList
    const index = articleList.findIndex(item => item.id === articleId)

    if (index === -1) return

    const article = articleList[index]
    const isFavorite = !article.isFavorite

    api.updateFavorite({ articleId, isFavorite }).then(res => {
      if (res.code === 200) {
        article.isFavorite = isFavorite
        article.favoriteCount = isFavorite ? article.favoriteCount + 1 : article.favoriteCount - 1
        this.setData({ [`articleList[${index}]`]: article })
        wx.showToast({
          title: isFavorite ? '收藏成功' : '取消收藏',
          icon: 'success'
        })
      }
    })
  },

  // 分享文章
  onShareAppMessage(e) {
    const article = e.target.dataset.article
    return {
      title: article.title,
      path: `/pages/article-detail/article-detail?id=${article.id}`,
      imageUrl: article.coverImage
    }
  }
})

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 */