<template>
  <view class="page-container login-page">
    <!-- 顶部品牌区 -->
    <view class="brand-area">
      <view class="brand-glow"></view>
      <view class="brand-icon">
        <text class="brand-emoji">🍻</text>
      </view>
      <text class="brand-name">喝酒了么</text>
      <text class="brand-slogan">让每一杯酒都有迹可循</text>
    </view>

    <!-- 登录区域 -->
    <view class="login-area">
      <!-- 理性饮酒须知 -->
      <view v-if="showNotice" class="notice-card card">
        <view class="notice-header">
          <text class="notice-icon">📋</text>
          <text class="notice-title">理性饮酒须知</text>
        </view>
        <view class="notice-content">
          <text class="notice-item">• 过量饮酒有害健康，请理性记录</text>
          <text class="notice-item">• 本应用不鼓励未成年人使用</text>
          <text class="notice-item">• 不涉及任何酒类销售与推荐</text>
          <text class="notice-item">• 您的数据仅用于个人记录</text>
        </view>
        <button class="btn-primary notice-btn" @click="acceptNotice">我已了解</button>
      </view>

      <!-- 主登录按钮 -->
      <view v-else class="login-actions">
        <button class="btn-cta login-btn" @click="handleLogin">
          <text class="login-btn-icon">📱</text>
          <text class="login-btn-text">微信一键登录</text>
        </button>

        <view class="login-divider">
          <view class="login-divider-line"></view>
          <text class="login-divider-text">或</text>
          <view class="login-divider-line"></view>
        </view>

        <button class="btn-secondary" @click="handleGuest">
          先看看再说
        </button>
      </view>
    </view>

    <!-- 饮酒偏好(登录后显示) -->
    <view v-if="showPreferences" class="pref-overlay">
      <view class="pref-card card-elevated">
        <view class="pref-header">
          <text class="text-h2">你的饮酒偏好</text>
          <text class="text-caption">可跳过，稍后在设置中修改</text>
        </view>

        <view class="pref-section">
          <text class="pref-label">常喝的酒类</text>
          <view class="pref-tags">
            <view
              v-for="cat in drinkCategories"
              :key="cat.id"
              class="tag"
              :class="{ 'tag-active': selectedCategories.includes(cat.id) }"
              @click="toggleCategory(cat.id)"
            >
              <text>{{ cat.emoji }} {{ cat.name }}</text>
            </view>
          </view>
        </view>

        <view class="pref-section">
          <text class="pref-label">饮酒频率</text>
          <view class="pref-options">
            <view
              v-for="freq in frequencies"
              :key="freq.id"
              class="freq-option"
              :class="{ 'freq-active': selectedFrequency === freq.id }"
              @click="selectedFrequency = freq.id"
            >
              <text>{{ freq.name }}</text>
            </view>
          </view>
        </view>

        <view class="pref-actions">
          <button class="btn-text" @click="skipPreferences">跳过</button>
          <button class="btn-primary" @click="savePreferences">保存并进入</button>
        </view>
      </view>
    </view>

    <!-- 底部协议 -->
    <view class="agreement">
      <text class="text-tiny">登录即代表同意</text>
      <text class="text-tiny text-amber">《用户协议》</text>
      <text class="text-tiny">和</text>
      <text class="text-tiny text-amber">《隐私政策》</text>
    </view>
  </view>
</template>

<script>
import { DRINK_CATEGORIES } from '../../common/constants'

export default {
  data() {
    return {
      showNotice: true,
      showPreferences: false,
      drinkCategories: DRINK_CATEGORIES,
      selectedCategories: [],
      selectedFrequency: '',
      frequencies: [
        { id: 'daily', name: '几乎每天' },
        { id: 'often', name: '经常喝' },
        { id: 'sometimes', name: '偶尔喝' },
        { id: 'rarely', name: '很少喝' }
      ]
    }
  },
  methods: {
    acceptNotice() {
      this.showNotice = false
    },
    handleLogin() {
      // Mock登录，直接显示偏好设置
      this.showPreferences = true
    },
    handleGuest() {
      uni.setStorageSync('is_logged_in', 'true')
      uni.setStorageSync('is_first_launch', 'false')
      uni.reLaunch({ url: '/pages/index/index' })
    },
    toggleCategory(id) {
      const idx = this.selectedCategories.indexOf(id)
      if (idx > -1) {
        this.selectedCategories.splice(idx, 1)
      } else {
        this.selectedCategories.push(id)
      }
    },
    skipPreferences() {
      this.finishLogin()
    },
    savePreferences() {
      const user = JSON.parse(uni.getStorageSync('user_info') || '{}')
      user.preferences = {
        favoriteCategories: this.selectedCategories,
        frequency: this.selectedFrequency
      }
      uni.setStorageSync('user_info', JSON.stringify(user))
      this.finishLogin()
    },
    finishLogin() {
      uni.setStorageSync('is_logged_in', 'true')
      uni.setStorageSync('is_first_launch', 'false')
      uni.reLaunch({ url: '/pages/index/index' })
    }
  }
}
</script>

<style lang="scss" scoped>
.login-page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: $sp-xl;
}

.brand-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding-top: 120rpx;
}

.brand-glow {
  position: absolute;
  width: 400rpx;
  height: 400rpx;
  background: radial-gradient(circle, rgba(232,168,56,0.15) 0%, transparent 70%);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%);
  filter: blur(30rpx);
}

.brand-icon {
  width: 200rpx;
  height: 200rpx;
  background: $bg-card;
  border-radius: $radius-xl;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: $shadow-md;
  margin-bottom: $sp-xl;
  position: relative;
  z-index: 2;
}

.brand-emoji {
  font-size: 96rpx;
}

.brand-name {
  font-size: $fs-hero;
  font-weight: $fw-black;
  color: $text-primary;
  letter-spacing: -4rpx;
  margin-bottom: $sp-sm;
}

.brand-slogan {
  font-size: $fs-md;
  color: $text-secondary;
}

.login-area {
  padding-bottom: $sp-3xl;
}

/* 理性饮酒须知 */
.notice-card {
  padding: $sp-xl;
}

.notice-header {
  display: flex;
  align-items: center;
  gap: $sp-sm;
  margin-bottom: $sp-lg;
}

.notice-icon {
  font-size: $fs-xl;
}

.notice-title {
  font-size: $fs-lg;
  font-weight: $fw-bold;
}

.notice-content {
  margin-bottom: $sp-lg;
}

.notice-item {
  display: block;
  font-size: $fs-sm;
  color: $text-secondary;
  line-height: $lh-loose;
}

.notice-btn {
  width: 100%;
}

/* 登录按钮 */
.login-actions {
  display: flex;
  flex-direction: column;
  gap: $sp-lg;
}

.login-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: $sp-sm;
}

.login-btn-icon {
  font-size: $fs-xl;
}

.login-btn-text {
  font-size: $fs-xl;
  font-weight: $fw-bold;
}

.login-divider {
  display: flex;
  align-items: center;
  gap: $sp-md;
}

.login-divider-line {
  flex: 1;
  height: 2rpx;
  background: rgba(255,255,255,0.06);
}

.login-divider-text {
  font-size: $fs-sm;
  color: $text-tertiary;
}

/* 偏好设置弹层 */
.pref-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: flex-end;
  z-index: 100;
  padding: $sp-lg;
}

.pref-card {
  width: 100%;
  padding: $sp-xl;
  border-radius: $radius-xl $radius-xl 0 0;
}

.pref-header {
  margin-bottom: $sp-xl;

  .text-h2 {
    display: block;
    margin-bottom: $sp-xs;
  }
}

.pref-section {
  margin-bottom: $sp-xl;
}

.pref-label {
  display: block;
  font-size: $fs-sm;
  font-weight: $fw-medium;
  color: $text-secondary;
  margin-bottom: $sp-md;
}

.pref-tags {
  display: flex;
  flex-wrap: wrap;
  gap: $sp-sm;
}

.pref-options {
  display: flex;
  gap: $sp-sm;
}

.freq-option {
  flex: 1;
  text-align: center;
  padding: $sp-md $sp-sm;
  border-radius: $radius-md;
  background: $bg-card;
  font-size: $fs-sm;
  color: $text-secondary;
  border: 2rpx solid transparent;
  transition: all $duration-fast $ease-out;

  &.freq-active {
    background: $amber-glow;
    color: $amber;
    border-color: rgba(232,168,56,0.3);
  }
}

.pref-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: $sp-lg;

  .btn-primary {
    flex: 1;
  }
}

/* 底部协议 */
.agreement {
  display: flex;
  justify-content: center;
  gap: $sp-xs;
  padding: $sp-lg 0;
}
</style>
