const { post } = require("../../utils/api");
const { getModule } = require("../../utils/modules");
const { hasManagePermission } = require("../../utils/permissions");
const { ensureModuleOpen, getActiveClassId, showError } = require("../../utils/page-helpers");

const FORM_DEFAULTS = {
  announcements: { title: "", content: "", is_pinned: false },
  votes: { title: "", description: "", options_text: "", vote_type: "single", is_anonymous: false },
  schedule: { title: "", type: "course", start_time: "", location: "", description: "" },
  fund: { type: "expense", amount: "", category: "", description: "", record_date: "" }
};

Page({
  data: {
    moduleKey: "",
    title: "新增",
    form: {},
    isAnnouncements: false,
    isVotes: false,
    isSchedule: false,
    isFund: false,
    scheduleTypes: ["course", "deadline", "activity"],
    fundTypes: ["income", "expense"],
    loading: false
  },

  onLoad(options) {
    const moduleKey = options.module || "";
    const module = getModule(moduleKey);
    const classId = getActiveClassId();
    const user = getApp().globalData.user;
    if (!module || !ensureModuleOpen(moduleKey) || !hasManagePermission(user, classId, moduleKey)) {
      wx.redirectTo({
        url: `/pages/module-unavailable/index?title=${encodeURIComponent(module?.title || "功能")}`
      });
      return;
    }
    this.setData({
      moduleKey,
      title: `新增${module.title}`,
      form: Object.assign({}, FORM_DEFAULTS[moduleKey] || {}),
      isAnnouncements: moduleKey === "announcements",
      isVotes: moduleKey === "votes",
      isSchedule: moduleKey === "schedule",
      isFund: moduleKey === "fund"
    });
    wx.setNavigationBarTitle({ title: `新增${module.title}` });
  },

  onInput(event) {
    const field = event.currentTarget.dataset.field;
    this.setData({ [`form.${field}`]: event.detail.value });
  },

  onSwitch(event) {
    const field = event.currentTarget.dataset.field;
    this.setData({ [`form.${field}`]: event.detail.value });
  },

  onPicker(event) {
    const field = event.currentTarget.dataset.field;
    const value = event.currentTarget.dataset.values.split(",")[Number(event.detail.value)];
    this.setData({ [`form.${field}`]: value });
  },

  async submit() {
    const classId = getActiveClassId();
    const moduleKey = this.data.moduleKey;
    const form = this.data.form;
    this.setData({ loading: true });
    try {
      if (moduleKey === "announcements") {
        await post(`/api/announcements/?class_id=${classId}`, {
          title: form.title,
          content: form.content || null,
          is_pinned: Boolean(form.is_pinned)
        });
      }
      if (moduleKey === "votes") {
        const options = String(form.options_text || "")
          .split("\n")
          .map((item) => item.trim())
          .filter(Boolean);
        await post(`/api/votes/?class_id=${classId}`, {
          title: form.title,
          description: form.description || null,
          vote_type: form.vote_type || "single",
          is_anonymous: Boolean(form.is_anonymous),
          max_choices: form.vote_type === "multiple" ? Math.max(2, options.length) : 1,
          options
        });
      }
      if (moduleKey === "schedule") {
        await post(`/api/schedule/?class_id=${classId}`, {
          title: form.title,
          type: form.type,
          start_time: form.start_time,
          location: form.location || null,
          description: form.description || null
        });
      }
      if (moduleKey === "fund") {
        await post(`/api/fund/?class_id=${classId}`, {
          type: form.type,
          amount: Number(form.amount),
          category: form.category,
          description: form.description || null,
          record_date: form.record_date
        });
      }
      wx.showToast({ title: "已保存", icon: "success" });
      setTimeout(() => wx.navigateBack(), 500);
    } catch (error) {
      showError(error, "保存失败");
    } finally {
      this.setData({ loading: false });
    }
  }
});