const store = require('../../utils/store.js');
const api = require('../../utils/api.js');

const GENDERS = ['男孩', '女孩', '不确定'];

function ageFromBirthday(bdayStr) {
  if (!bdayStr) return '';
  const b = new Date(bdayStr);
  const now = new Date();
  let months = (now.getFullYear() - b.getFullYear()) * 12 + (now.getMonth() - b.getMonth());
  if (months < 0) months = 0;
  return months < 24 ? months + '个月' : Math.floor(months / 12) + '岁';
}

Page({
  data: {
    step: 0,
    petType: '猫猫',
    petEmoji: '🐱',
    petName: '',
    birthday: '',
    genderIdx: 0,
    weight: '',
    stage: '幼年期',
    goals: [
      { label: '不知道每天该做什么', on: true },
      { label: '疫苗驱虫怕忘记', on: true },
      { label: '想记录体重和健康', on: false },
      { label: '担心生病不会判断', on: false },
      { label: '想控制养宠开销', on: false },
      { label: '想生成成长报告', on: false },
    ],
    submitting: false,
  },
  onLoad() {
    // 已有宠物则直接进首页
    store
      .ready()
      .then(() => {
        if (store.getPets().length > 0) {
          wx.switchTab({ url: '/pages/home/home' });
        }
      })
      .catch(() => {});
  },
  nextStep() {
    this.setData({ step: Math.min(this.data.step + 1, 5) });
  },
  choosePet(e) {
    const { type, emoji } = e.currentTarget.dataset;
    this.setData({ petType: type, petEmoji: emoji });
  },
  onName(e) { this.setData({ petName: e.detail.value }); },
  onWeight(e) { this.setData({ weight: e.detail.value }); },
  onBirthday(e) { this.setData({ birthday: e.detail.value }); },
  selectGender(e) { this.setData({ genderIdx: Number(e.currentTarget.dataset.index) }); },
  // 先随便看看：不建数据，直接进首页浏览（无宠物时首页显示空态）
  skipBrowse() { wx.switchTab({ url: '/pages/home/home' }); },
  savePetNext() {
    if (!(this.data.petName || '').trim()) {
      wx.showToast({ title: '给它起个名字吧', icon: 'none' });
      return;
    }
    this.nextStep();
  },
  chooseStage(e) {
    this.setData({ stage: e.currentTarget.dataset.stage });
  },
  toggleGoal(e) {
    const i = e.currentTarget.dataset.index;
    this.setData({ [`goals[${i}].on`]: !this.data.goals[i].on });
  },
  async submit() {
    if (this.data.submitting) return;
    this.setData({ submitting: true });
    wx.showLoading({ title: '生成计划中...' });
    const body = {
      name: (this.data.petName || '').trim(),
      emoji: this.data.petEmoji,
      type: this.data.petType,
      gender: GENDERS[this.data.genderIdx],
      birthday: this.data.birthday,
      weight: this.data.weight,
      stage: this.data.stage,
      age: ageFromBirthday(this.data.birthday),
      goals: this.data.goals.filter((g) => g.on).map((g) => g.label),
    };
    try {
      await store.ready();
      await api.onboarding(body);
      await store.loadPets();
      wx.hideLoading();
      wx.switchTab({ url: '/pages/home/home' });
    } catch (e) {
      wx.hideLoading();
      wx.showToast({ title: e.message || '创建失败', icon: 'none' });
      this.setData({ submitting: false });
    }
  },
  finishOnboard() { this.submit(); },
});