/**
 * 兴趣与生活方式页 U09（Phase 04 P04-T24）
 *
 * 重构要点（遵循 AGENTS.md 不变量）：
 *   - 数据：profileService.getProfile + userStore.updateProfile（第 9 条）
 *   - 数量限制：BUSINESS_LIMITS.MAX_INTEREST_TAGS（第 12 条，不硬编码）
 *   - 草稿恢复：onLoad 读 ONBOARDING_DRAFT.interests，保存前写回
 *   - 下一步：跳 profile-intent
 */
const { userStore, appStore } = require('../../stores');
const { profileService } = require('../../services');
const { ROUTE, STORAGE_KEYS, BUSINESS_LIMITS } = require('../../constants');

const INTEREST_OPTIONS = [
  { code: 'travel', name: '旅行' },
  { code: 'reading', name: '阅读' },
  { code: 'sports', name: '运动' },
  { code: 'fitness', name: '健身' },
  { code: 'photography', name: '摄影' },
  { code: 'movie', name: '电影' },
  { code: 'music', name: '音乐' },
  { code: 'food', name: '美食' },
  { code: 'cooking', name: '烹饪' },
  { code: 'outdoor', name: '户外' },
  { code: 'pets', name: '宠物' },
  { code: 'games', name: '游戏' },
  { code: 'culture', name: '传统文化' },
  { code: 'charity', name: '公益活动' },
  { code: 'other', name: '其他' },
];

const LIFESTYLE_OPTIONS = [
  { code: 'quiet', name: '喜欢安静' },
  { code: 'social', name: '喜欢社交' },
  { code: 'outdoor', name: '喜欢户外' },
  { code: 'homebody', name: '居家型' },
  { code: 'regular_work', name: '工作规律' },
  { code: 'frequent_travel', name: '经常出差' },
  { code: 'family_oriented', name: '注重家庭' },
  { code: 'other', name: '其他' },
];

Page({
  data: {
    statusBarHeight: 20,
    navBarHeight: 44,
    loading: false,
    saving: false,
    interests: INTEREST_OPTIONS.map((o) => ({ ...o, selected: false })),
    lifestyles: LIFESTYLE_OPTIONS.map((o) => ({ ...o, selected: false })),
    maxTags: BUSINESS_LIMITS.MAX_INTEREST_TAGS,
    selectedInterestsCount: 0,
  },

  onLoad() {
    this._initSystemInfo();
    this._applyDraft();
    this.loadProfile();
  },

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

  async loadProfile() {
    this.setData({ loading: true });
    try {
      const profile = await profileService.getProfile();
      this._mergeProfile(profile);
    } catch (err) { /* 首次填写 */ } finally {
      this.setData({ loading: false });
    }
  },

  _mergeProfile(profile) {
    if (!profile) return;
    const d = this._readDraft();
    const savedInterests = d.interests || profile.interests || [];
    const savedLifestyles = d.lifestyles || profile.lifestyles || [];
    const interests = this.data.interests.map((o) => ({
      ...o,
      selected: savedInterests.includes(o.code),
    }));
    const lifestyles = this.data.lifestyles.map((o) => ({
      ...o,
      selected: savedLifestyles.includes(o.code),
    }));
    this.setData({
      interests,
      lifestyles,
      selectedInterestsCount: interests.filter((o) => o.selected).length,
    });
  },

  // ============ 草稿 ============
  _readDraft() {
    try {
      const draft = wx.getStorageSync(STORAGE_KEYS.ONBOARDING_DRAFT) || {};
      return draft.interests || {};
    } catch (e) {
      return {};
    }
  },

  _applyDraft() {
    const d = this._readDraft();
    if (!d || Object.keys(d).length === 0) return;
    const savedInterests = d.interests || [];
    const savedLifestyles = d.lifestyles || [];
    const interests = this.data.interests.map((o) => ({
      ...o,
      selected: savedInterests.includes(o.code),
    }));
    const lifestyles = this.data.lifestyles.map((o) => ({
      ...o,
      selected: savedLifestyles.includes(o.code),
    }));
    this.setData({
      interests,
      lifestyles,
      selectedInterestsCount: interests.filter((o) => o.selected).length,
    });
  },

  _writeDraft() {
    try {
      const draft = wx.getStorageSync(STORAGE_KEYS.ONBOARDING_DRAFT) || {};
      draft.interests = {
        interests: this.data.interests.filter((o) => o.selected).map((o) => o.code),
        lifestyles: this.data.lifestyles.filter((o) => o.selected).map((o) => o.code),
      };
      draft.currentStep = 'interests';
      wx.setStorageSync(STORAGE_KEYS.ONBOARDING_DRAFT, draft);
    } catch (e) { /* ignore */ }
  },

  // ============ 交互 ============
  onInterestTap(e) {
    const code = e.currentTarget.dataset.code;
    const interests = this.data.interests.map((o) => {
      if (o.code !== code) return o;
      // 取消选中直接切换；选中需检查上限
      if (!o.selected && this.data.selectedInterestsCount >= this.data.maxTags) {
        appStore.toast(`最多选择 ${this.data.maxTags} 个兴趣`);
        return o;
      }
      return { ...o, selected: !o.selected };
    });
    this.setData({
      interests,
      selectedInterestsCount: interests.filter((o) => o.selected).length,
    });
  },

  onLifestyleTap(e) {
    const code = e.currentTarget.dataset.code;
    const lifestyles = this.data.lifestyles.map((o) => {
      if (o.code !== code) return o;
      return { ...o, selected: !o.selected };
    });
    this.setData({ lifestyles });
  },

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

  async onNext() {
    if (this.data.saving) return;
    this.setData({ saving: true });
    this._writeDraft();
    try {
      await userStore.updateProfile({
        interests: this.data.interests.filter((o) => o.selected).map((o) => o.code),
        lifestyles: this.data.lifestyles.filter((o) => o.selected).map((o) => o.code),
      });
      this.setData({ saving: false });
      wx.navigateTo({ url: ROUTE.ONBOARDING.PROFILE_INTENT });
    } catch (err) {
      this.setData({ saving: false });
      appStore.toastError(err, '保存失败');
    }
  },
});