/**
 * 个人介绍页 U11（Phase 04 P04-T26）
 *
 * 重构要点（遵循 AGENTS.md 不变量）：
 *   - 数据：profileService.getProfile + userStore.updateProfile（第 9 条）
 *   - 字数限制：BUSINESS_LIMITS.MIN_INTRO_LENGTH / MAX_INTRO_LENGTH（第 12 条，不硬编码）
 *   - 审核规则提示：禁止手机号/微信号/二维码/广告等（功能清单 §4.6）
 *   - 草稿恢复：onLoad 读 ONBOARDING_DRAFT.intro，保存前写回
 *   - 下一步：跳 profile-preference
 */
const { userStore, appStore } = require('../../stores');
const { profileService } = require('../../services');
const { ROUTE, STORAGE_KEYS, BUSINESS_LIMITS } = require('../../constants');

Page({
  data: {
    statusBarHeight: 20,
    navBarHeight: 44,
    loading: false,
    saving: false,
    selfIntro: '',
    minLen: BUSINESS_LIMITS.MIN_INTRO_LENGTH,
    maxLen: BUSINESS_LIMITS.MAX_INTRO_LENGTH,
    currentLen: 0,
    guidelines: [
      '可以介绍工作、性格、兴趣、生活状态',
      '以及你期待怎样的感情',
      '禁止填写手机号、微信号、二维码',
      '禁止广告、色情低俗、投资引流内容',
    ],
  },

  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();
      const d = this._readDraft();
      const selfIntro = d.selfIntro || (profile && profile.selfIntro) || '';
      this.setData({
        selfIntro,
        currentLen: selfIntro.length,
        loading: false,
      });
    } catch (err) {
      this.setData({ loading: false });
    }
  },

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

  _applyDraft() {
    const d = this._readDraft();
    if (!d || Object.keys(d).length === 0) return;
    const selfIntro = d.selfIntro || '';
    this.setData({ selfIntro, currentLen: selfIntro.length });
  },

  _writeDraft() {
    try {
      const draft = wx.getStorageSync(STORAGE_KEYS.ONBOARDING_DRAFT) || {};
      draft.intro = { selfIntro: this.data.selfIntro };
      draft.currentStep = 'intro';
      wx.setStorageSync(STORAGE_KEYS.ONBOARDING_DRAFT, draft);
    } catch (e) { /* ignore */ }
  },

  // ============ 交互 ============
  onIntroInput(e) {
    const value = e.detail.value || '';
    this.setData({ selfIntro: value, currentLen: value.length });
  },

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

  async onNext() {
    if (this.data.saving) return;
    const { selfIntro, minLen, maxLen } = this.data;
    if (selfIntro.length < minLen) {
      return appStore.toast(`至少填写 ${minLen} 字`);
    }
    if (selfIntro.length > maxLen) {
      return appStore.toast(`最多填写 ${maxLen} 字`);
    }

    this.setData({ saving: true });
    this._writeDraft();
    try {
      await userStore.updateProfile({ selfIntro });
      this.setData({ saving: false });
      wx.navigateTo({ url: ROUTE.ONBOARDING.PROFILE_PREFERENCE });
    } catch (err) {
      this.setData({ saving: false });
      appStore.toastError(err, '保存失败');
    }
  },
});