/**
 * 头像与照片页 U08（Phase 04 P04-T23）
 *
 * 重构要点（遵循 AGENTS.md 不变量 + Phase 04 验收条件）：
 *   - 数据：profileService.getPhotos（每次从服务端获取，不在本地缓存图片 URL —— 验收"图片URL非永久公开"）
 *   - 上传：profileService.requestUploadToken + wx.uploadFile（EXIF 由服务端清理，前端不处理）
 *   - 删除：profileService.deletePhoto
 *   - 主头像：profileService.setMainPhoto（第一张或用户指定）
 *   - 数量限制：BUSINESS_LIMITS.MAX_PROFILE_PHOTOS（第 12 条，不硬编码）
 *   - 敏感数据：本页不涉及身份证/手机号（第 8 条）
 *   - 下一步条件：至少 1 张主头像
 */
const { appStore } = require('../../stores');
const { profileService } = require('../../services');
const { ROUTE, BUSINESS_LIMITS } = require('../../constants');

Page({
  data: {
    statusBarHeight: 20,
    navBarHeight: 44,
    loading: false,
    saving: false,
    avatarPhotos: [],
    lifestylePhotos: [],
    maxLifestyle: BUSINESS_LIMITS.MAX_PROFILE_PHOTOS - 1,
    // 页面说明
    guidelines: [
      '请使用本人近期真实照片',
      '禁止网图、二维码、广告、联系方式图片',
      '建议真人生活照，避免过度美颜',
    ],
  },

  onLoad() {
    this._initSystemInfo();
    this._applyPhotoLimit();
    this.loadPhotos();
  },

  onShow() {
    // 服务端配置（appStore.businessConfig）可能在冷启动后才拉取完成，onShow 再取一次
    this._applyPhotoLimit();
  },

  /**
   * 照片上限读运行时配置（服务端下发，经 appStore.businessConfig 覆盖本地默认），
   * 前端不写死 6（PROFILE-001）。生活照槽位 = 总上限 - 1（头像占 1 张）。
   */
  _applyPhotoLimit() {
    const maxTotal = (appStore.state.businessConfig && appStore.state.businessConfig.MAX_PROFILE_PHOTOS)
      || BUSINESS_LIMITS.MAX_PROFILE_PHOTOS;
    this.setData({ maxLifestyle: Math.max(0, maxTotal - 1) });
  },

  _initSystemInfo() {
    try {
      const sysInfo = wx.getSystemInfoSync();
      this.setData({
        statusBarHeight: sysInfo.statusBarHeight || 20,
        navBarHeight: 44,
      });
    } catch (e) { /* 使用默认值 */ }
  },

  async loadPhotos() {
    this.setData({ loading: true });
    try {
      const result = await profileService.getPhotos();
      const photos = (result && result.photos) || [];
      const avatarPhotos = photos.filter((p) => p.photoType === 'avatar');
      const lifestylePhotos = photos.filter((p) => p.photoType === 'lifestyle');
      this.setData({ avatarPhotos, lifestylePhotos, loading: false });
    } catch (err) {
      this.setData({ loading: false });
      appStore.toastError(err, '加载照片失败');
    }
  },

  // ============ 上传 ============
  /** 主头像区添加 */
  onAddAvatar() {
    this._chooseAndUpload('avatar');
  },

  /** 生活照区添加 */
  onAddLifestyle() {
    const remaining = this.data.maxLifestyle - this.data.lifestylePhotos.length;
    if (remaining <= 0) {
      appStore.toast(`最多上传 ${this.data.maxLifestyle + 1} 张照片`);
      return;
    }
    this._chooseAndUpload('lifestyle');
  },

  _chooseAndUpload(photoType) {
    wx.chooseMedia({
      count: 1,
      mediaType: ['image'],
      sourceType: ['album', 'camera'],
      sizeType: ['compressed'],
      success: (res) => {
        const tempFile = res.tempFiles[0];
        if (!tempFile) return;
        this._uploadPhoto(tempFile.tempFilePath, photoType);
      },
      fail: () => { /* 用户取消 */ },
    });
  },

  async _uploadPhoto(filePath, photoType) {
    appStore.showLoading('上传中…');
    try {
      // 1. 获取上传凭证（EXIF 由服务端清理）；带上 photoType 使 fileKey 路径与类型一致
      const fileName = `photo_${Date.now()}.jpg`;
      const tokenRes = await profileService.requestUploadToken({ fileName, contentType: 'image/jpeg', photoType });

      // 2. 上传到对象存储
      await new Promise((resolve, reject) => {
        wx.uploadFile({
          url: tokenRes.uploadUrl,
          filePath,
          name: 'file',
          formData: { 'Content-Type': 'image/jpeg' },
          success: (res) => {
            if (res.statusCode >= 200 && res.statusCode < 300) resolve(res);
            else reject(new Error('上传失败'));
          },
          fail: reject,
        });
      });

      // 3. 直传成功后必须调 confirm 落库，否则对象成孤儿、照片不展示（修复"照片直传不落库"）
      const confirmRes = await profileService.confirmPhoto({ fileKey: tokenRes.fileKey, photoType });

      // 4. 若上传的是头像区，或当前无主头像，则设为主头像（用真实 photoId）
      if (photoType === 'avatar' || this.data.avatarPhotos.length === 0) {
        await profileService.setMainPhoto(confirmRes.photoId);
      }

      appStore.hideLoading();
      appStore.toastSuccess('上传成功');
      this.loadPhotos();
    } catch (err) {
      appStore.hideLoading();
      appStore.toastError(err, '上传失败');
    }
  },

  // ============ 删除 ============
  async onRemoveAvatar(e) {
    const { index } = e.detail;
    const photo = this.data.avatarPhotos[index];
    if (!photo) return;
    this._removePhoto(photo.photoId);
  },

  async onRemoveLifestyle(e) {
    const { index } = e.detail;
    const photo = this.data.lifestylePhotos[index];
    if (!photo) return;
    this._removePhoto(photo.photoId);
  },

  async _removePhoto(photoId) {
    const confirm = await appStore.confirm('确定删除这张照片？', '删除后不可恢复');
    if (!confirm) return;
    appStore.showLoading('删除中…');
    try {
      await profileService.deletePhoto(photoId);
      appStore.hideLoading();
      appStore.toastSuccess('已删除');
      this.loadPhotos();
    } catch (err) {
      appStore.hideLoading();
      appStore.toastError(err, '删除失败');
    }
  },

  // ============ 预览 ============
  onPreviewAvatar(e) {
    const { index } = e.detail;
    const photo = this.data.avatarPhotos[index];
    if (photo) this._preview(photo.url);
  },

  onPreviewLifestyle(e) {
    const { index } = e.detail;
    const photo = this.data.lifestylePhotos[index];
    if (photo) this._preview(photo.url);
  },

  _preview(currentUrl) {
    const urls = [
      ...this.data.avatarPhotos.map((p) => p.url),
      ...this.data.lifestylePhotos.map((p) => p.url),
    ].filter(Boolean);
    if (urls.length === 0) return;
    wx.previewImage({ urls, current: currentUrl });
  },

  // ============ 导航 ============
  onBack() {
    wx.navigateBack();
  },

  onNext() {
    if (this.data.avatarPhotos.length === 0) {
      appStore.toast('请至少上传 1 张主头像');
      return;
    }
    wx.navigateTo({ url: ROUTE.ONBOARDING.PROFILE_INTERESTS });
  },
});