const { postForm, uploadFile } = require("../../utils/api");
const { getActiveClassId, showError } = require("../../utils/page-helpers");

Page({
  data: {
    title: "",
    content: "",
    images: [],
    loading: false
  },

  onLoad() {
    wx.setNavigationBarTitle({ title: "发布动态" });
  },

  onTitleInput(event) {
    this.setData({ title: event.detail.value });
  },

  onContentInput(event) {
    this.setData({ content: event.detail.value });
  },

  chooseImages() {
    wx.chooseMedia({
      count: 9 - this.data.images.length,
      mediaType: ["image"],
      sourceType: ["album", "camera"],
      success: (res) => {
        const paths = (res.tempFiles || []).map((item) => item.tempFilePath);
        this.setData({ images: [...this.data.images, ...paths].slice(0, 9) });
      }
    });
  },

  removeImage(event) {
    const index = Number(event.currentTarget.dataset.index);
    this.setData({
      images: this.data.images.filter((_, itemIndex) => itemIndex !== index)
    });
  },

  async submit() {
    const title = this.data.title.trim();
    const content = this.data.content.trim();
    if (!title) {
      wx.showToast({ title: "请输入标题", icon: "none" });
      return;
    }
    this.setData({ loading: true });
    try {
      const classId = getActiveClassId();
      const created = await postForm("/api/timeline/", {
        title,
        content,
        class_id: String(classId || "")
      });
      for (let index = 0; index < this.data.images.length; index += 1) {
        await uploadFile(`/api/timeline/${created.id}/images`, this.data.images[index]);
      }
      wx.showToast({ title: "已发布", icon: "success" });
      const pages = getCurrentPages();
      const previousPage = pages[pages.length - 2];
      if (previousPage?.setData) {
        previousPage.setData({ needsRefresh: true });
      }
      setTimeout(() => wx.navigateBack(), 500);
    } catch (error) {
      showError(error, "发布失败");
    } finally {
      this.setData({ loading: false });
    }
  }
});