const store = require('../../utils/store.js');
const api = require('../../utils/api.js');
const { toastErr } = require('../../utils/ui.js');

// key 要和后端 service.UserThemes 一致，色值只在 profile-head 的 wxss 里
const THEMES = [
  { key: 'warm', label: '暖橙' },
  { key: 'mint', label: '薄荷' },
  { key: 'sky', label: '天青' },
  { key: 'violet', label: '藕紫' },
  { key: 'ink', label: '墨灰' },
];

Page({
  data: {
    themes: THEMES,
    form: { bio: '', bg_url: '', bg_file_id: '', theme: 'warm', show_pets: true },
    bioLen: 0,
    preview: null,
    saving: false,
  },
  onLoad() {
    store
      .ready()
      .then(() => this.loadCard())
      .catch((e) => toastErr(e));
  },
  loadCard() {
    const uid = (store.getUser() || {}).id;
    if (!uid) return;
    api
      .userCard(uid)
      .then((card) => {
        this.setData({
          form: {
            bio: card.bio || '',
            bg_url: card.bg_url || '',
            bg_file_id: '', // 没重新上传就不带这个字段，避免把已有头图覆盖成空
            theme: card.theme || 'warm',
            show_pets: card.show_pets !== false,
          },
          bioLen: (card.bio || '').length,
        });
        this._card = card;
        this.syncPreview();
      })
      .catch((e) => toastErr(e));
  },
  // 预览喂给 profile-head 的就是一份改过的 card，组件那边不用知道自己在被预览
  syncPreview() {
    const f = this.data.form;
    this.setData({
      preview: Object.assign({}, this._card || {}, {
        bio: f.bio,
        bg_url: f.bg_url,
        theme: f.theme,
        show_pets: f.show_pets,
      }),
    });
  },
  pickBg() {
    wx.chooseMedia({
      count: 1,
      mediaType: ['image'],
      sizeType: ['compressed'],
      success: (res) => {
        const path = res.tempFiles[0].tempFilePath;
        // 先用本地路径顶上，别让用户对着转圈等上传
        this.setData({ 'form.bg_url': path });
        this.syncPreview();
        wx.showLoading({ title: '上传中…' });
        api
          .uploadFile(path)
          .then((file) => {
            wx.hideLoading();
            this.setData({ 'form.bg_file_id': file.id, 'form.bg_url': file.url });
            this.syncPreview();
          })
          .catch((e) => {
            wx.hideLoading();
            this.setData({ 'form.bg_url': (this._card && this._card.bg_url) || '' });
            this.syncPreview();
            toastErr(e, '上传失败');
          });
      },
    });
  },
  clearBg() {
    // 空字符串是「清掉头图」的显式信号，和「没传」不是一回事
    this.setData({ 'form.bg_url': '', 'form.bg_file_id': '' });
    this.syncPreview();
  },
  pickTheme(e) {
    this.setData({ 'form.theme': e.currentTarget.dataset.key });
    this.syncPreview();
  },
  onBio(e) {
    this.setData({ 'form.bio': e.detail.value, bioLen: e.detail.value.length });
    this.syncPreview();
  },
  onShowPets(e) {
    this.setData({ 'form.show_pets': e.detail.value });
    this.syncPreview();
  },
  save() {
    if (this.data.saving) return;
    const f = this.data.form;
    const body = { bio: f.bio, theme: f.theme, show_pets: f.show_pets };
    // 只有真的动过头图才带 bg_file_id：新上传带新 id，点了「恢复默认渐变」带空串，
    // 两者都没有就不传，让后端保持原样
    const had = (this._card && this._card.bg_url) || '';
    if (f.bg_file_id) body.bg_file_id = f.bg_file_id;
    else if (had && !f.bg_url) body.bg_file_id = '';

    this.setData({ saving: true });
    api
      .updateDecoration(body)
      .then((user) => {
        this.setData({ saving: false });
        store.setUser(user); // 返回的就是改完的 user，别再多请求一次
        wx.showToast({ title: '已保存', icon: 'success' });
        setTimeout(() => wx.navigateBack(), 600);
      })
      .catch((e) => {
        this.setData({ saving: false });
        toastErr(e, '保存失败');
      });
  },
});