<template>
  <view class="tab-bar">
    <view
      v-for="(tab, index) in tabs"
      :key="tab.path"
      :class="['tab-item', { active: currentIndex === index }]"
      hover-class="tab-item--hover"
      @tap="onTabTap(index)"
    >
      <image
        :src="currentIndex === index ? tab.iconActive : tab.icon"
        mode="aspectFit"
        class="tab-icon"
      />
      <text class="tab-label">{{ tab.label }}</text>
    </view>
  </view>
</template>

<script setup>
import { computed, ref } from 'vue'
import {
  PAGE,
  TAB_ROUTES,
  getCurrentRoutePath,
  getTabIndexByRoute,
  switchToTab
} from '@/common/constants/routes.js'

const props = defineProps({
  /** 当前 Tab 索引，由 Tab 页传入以保证高亮准确 */
  active: {
    type: Number,
    default: -1
  }
})

const tapping = ref(false)

const tabs = [
  {
    path: PAGE.INDEX,
    icon: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/home.png',
    iconActive: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/active/home.png',
    label: '首页'
  },
  {
    path: PAGE.COURSE,
    icon: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/course.png',
    iconActive: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/active/course.png',
    label: '课程'
  },
  {
    path: PAGE.TRAIN,
    icon: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/train.png',
    iconActive: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/active/train.png',
    label: '训练'
  },
  {
    path: PAGE.DISCOVER,
    icon: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/discover.png',
    iconActive: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/active/discover.png',
    label: '发现'
  },
  {
    path: PAGE.MEMBER,
    icon: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/profile.png',
    iconActive: 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/tabBar/active/profile.png',
    label: '我的'
  }
]

const currentIndex = computed(() => {
  if (props.active >= 0) return props.active
  return getTabIndexByRoute(getCurrentRoutePath())
})

function onTabTap(index) {
  if (tapping.value || index === currentIndex.value) return
  tapping.value = true
  switchToTab(TAB_ROUTES[index])
  setTimeout(() => {
    tapping.value = false
  }, 350)
}
</script>

<style lang="scss" scoped>
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120rpx;
  background: #1A4A6F;
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding-bottom: constant(safe-area-inset-bottom);
  padding-bottom: env(safe-area-inset-bottom);
  box-shadow: 0 -4rpx 20rpx rgba(0, 0, 0, 0.06);
  border-radius: 32rpx 32rpx 0 0;
  z-index: 999;
}

.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8rpx;
  padding: 12rpx 24rpx;
}

.tab-icon {
  width: 40rpx;
  height: 40rpx;
}

.tab-label {
  font-size: 22rpx;
  color: #94a3b8;
}

.tab-item.active .tab-label {
  color: #f97316;
  font-weight: 600;
}
</style>
