<template>
  <van-config-provider
    :theme="theme"
    :theme-vars="themeVars"
    class="app-provider"
  >
    <div class="app-root">
      <router-view v-slot="{ Component }">
        <keep-alive
          :include="cachedViews"
          :max="8"
        >
          <component
            :is="Component"
            :key="route.name"
          />
        </keep-alive>
      </router-view>
      <van-tabbar
        v-show="showTabbar"
        v-model="active"
      >
        <van-tabbar-item
          name="ccalendar"
          icon="notes"
          to="/calendar"
        >
          日历
        </van-tabbar-item>
        <van-tabbar-item
          name="statistics"
          icon="chart-trending-o"
          to="/"
          @click="handleTabClick('/statistics')"
        >
          统计
        </van-tabbar-item>
        <van-tabbar-item
          name="balance"
          icon="balance-list"
          :to="messageStore.unreadCount > 0 ? '/balance?tab=message' : '/balance'"
          :badge="messageStore.unreadCount || null"
          @click="handleTabClick('/balance')"
        >
          账单
        </van-tabbar-item>
        <van-tabbar-item
          name="budget"
          icon="bill-o"
          to="/budget"
          @click="handleTabClick('/budget')"
        >
          预算
        </van-tabbar-item>
        <van-tabbar-item
          name="setting"
          icon="setting"
          to="/setting"
        >
          设置
        </van-tabbar-item>
      </van-tabbar>
      <GlobalAddBill
        v-if="isShowAddBill"
        @success="handleAddTransactionSuccess"
      />

      <div
        v-if="needRefresh"
        class="update-toast"
        @click="updateServiceWorker"
      >
        <van-icon
          name="upgrade"
          class="update-icon"
        />
        <span>新版本可用，点击刷新</span>
      </div>

      <!-- 调试信息面板 -->
      <div
        v-if="showDebug"
        class="debug-panel"
      >
        <div class="debug-title">
          底部导航栏调试信息
        </div>
        <div class="debug-section">
          <div class="debug-subtitle">
            视口尺寸
          </div>
          <div class="debug-item">
            窗口高度: {{ debugInfo.windowHeight }}px
          </div>
          <div class="debug-item">
            视口高度: {{ debugInfo.viewportHeight }}px
          </div>
          <div class="debug-item">
            App Root 高度: {{ debugInfo.appRootHeight }}px
          </div>
        </div>
        <div class="debug-section">
          <div class="debug-subtitle">
            TabBar 位置
          </div>
          <div class="debug-item">
            position: {{ debugInfo.tabbarPosition }}
          </div>
          <div class="debug-item">
            bottom (CSS): {{ debugInfo.tabbarBottomStyle }}
          </div>
          <div class="debug-item">
            top (实际): {{ debugInfo.tabbarTop }}px
          </div>
          <div class="debug-item">
            bottom (实际): {{ debugInfo.tabbarBottom }}px
          </div>
        </div>
        <div class="debug-section">
          <div class="debug-subtitle">
            TabBar 尺寸
          </div>
          <div class="debug-item">
            height (实际): {{ debugInfo.tabbarHeight }}px
          </div>
          <div class="debug-item">
            min-height: {{ debugInfo.tabbarMinHeight }}
          </div>
          <div class="debug-item">
            padding-bottom: {{ debugInfo.tabbarPaddingBottom }}
          </div>
          <div class="debug-item">
            box-sizing: {{ debugInfo.tabbarBoxSizing }}
          </div>
          <div class="debug-item">
            安全区域底部: {{ debugInfo.safeAreaBottom }}
          </div>
        </div>
        <button
          class="debug-close"
          @click="showDebug = false"
        >
          关闭
        </button>
      </div>
    </div>
  </van-config-provider>
</template>

<script setup>
import { RouterView, useRoute } from 'vue-router'
import { ref, onMounted, onUnmounted, computed, watch } from 'vue'
import { useMessageStore } from '@/stores/message'
import GlobalAddBill from '@/components/Global/GlobalAddBill.vue'
import { needRefresh, updateServiceWorker } from './registerServiceWorker'
import '@/styles/common.css'

const messageStore = useMessageStore()

// 定义需要缓存的页面组件名称
const cachedViews = ref([
  'CalendarV2', // 日历V2页面
  'CalendarView', // 日历V1页面
  'StatisticsView', // 统计页面
  'StatisticsV2View', // 统计V2页面
  'BalanceView', // 账单页面
  'BudgetView' // 预算页面
])

const updateVh = () => {
  const vh = window.innerHeight
  document.documentElement.style.setProperty('--vh', `${vh}px`)
}

// 修复 PWA 模式下键盘收起页面不回弹的问题
const handleFocusOut = () => {
  if (/(iPhone|iPad|iPod|iOS|Android)/i.test(navigator.userAgent)) {
    // 延迟一小段时间执行，确保键盘收起动作已开始
    setTimeout(() => {
      // 强制回到顶部
      window.scrollTo(0, 0)
      // 同时也触发一次高度更新
      updateVh()
    }, 100)
  }
}

onMounted(() => {
  updateVh()
  window.addEventListener('resize', updateVh)
  if (window.visualViewport) {
    window.visualViewport.addEventListener('resize', updateVh)
  }
  // 注册全局失去焦点监听
  document.addEventListener('focusout', handleFocusOut)
})

onUnmounted(() => {
  window.removeEventListener('resize', updateVh)
  if (window.visualViewport) {
    window.visualViewport.removeEventListener('resize', updateVh)
  }
  // 销毁监听
  document.removeEventListener('focusout', handleFocusOut)
})

const route = useRoute()
// 根据路由判断是否显示Tabbar
const showTabbar = computed(() => {
  return (
    route.path === '/' ||
    route.path === '/calendar' ||
    route.path === '/calendar-v2' ||
    route.path === '/message' ||
    route.path === '/setting' ||
    route.path === '/balance' ||
    route.path === '/budget'
  )
})

const active = ref('')
const theme = ref('light')

// Vant UI 主题变量映射
const themeVars = computed(() => {
  const vars = {
    navBarBackground: 'var(--bg-primary)',
    navBarTextColor: 'var(--text-primary)',
    cardBackground: 'var(--bg-secondary)',
    cellBackground: 'var(--bg-secondary)',
    background: 'var(--bg-primary)',
    background2: 'var(--bg-secondary)',
    textColor: 'var(--text-primary)',
    textColor2: 'var(--text-secondary)',
    borderColor: 'var(--bg-tertiary)',
    tabbarBackground: 'var(--bg-primary)'
  }
  return vars
})

// 检测系统深色模式
const updateTheme = () => {
  const isDark = window.matchMedia('(prefers-color-scheme: dark)').matches
  theme.value = isDark ? 'dark' : 'light'
  // 在文档根元素上设置 data-theme 属性，使 CSS 变量生效
  document.documentElement.setAttribute('data-theme', theme.value)
}

// 监听系统主题变化
let mediaQuery
onMounted(() => {
  updateTheme()
  mediaQuery = window.matchMedia('(prefers-color-scheme: dark)')
  mediaQuery.addEventListener('change', updateTheme)
  setActive(route.path)
})

setInterval(() => {
  messageStore.updateUnreadCount()
}, 60 * 1000) // 每60秒更新一次未读消息数

// 监听路由变化调整
watch(
  () => route.path,
  (newPath) => {
    setActive(newPath)

    messageStore.updateUnreadCount()
  }
)

const setActive = (path) => {
  active.value = (() => {
    switch (path) {
      case '/calendar':
      case '/calendar-v2':
        return 'ccalendar'
      case '/balance':
      case '/message':
        return 'balance'
      case '/setting':
        return 'setting'
      case '/budget':
        return 'budget'
      default:
        return 'statistics'
    }
  })()
}

const isShowAddBill = computed(() => {
  return route.path === '/' || route.path === '/balance' || route.path === '/message' || route.path === '/calendar' || route.path === '/calendar-v2'
})

onUnmounted(() => {
  if (mediaQuery) {
    mediaQuery.removeEventListener('change', updateTheme)
  }
})

// 处理tab点击，如果点击当前页面则滚动到顶部
const handleTabClick = (path) => {
  if (route.path === path) {
    window.scrollTo({ top: 0, behavior: 'smooth' })
  }
}

const handleAddTransactionSuccess = () => {
  // 当添加交易成功时，通知当前页面刷新数据
  const event = new Event('transactions-changed')
  window.dispatchEvent(event)
}

// 调试信息
const showDebug = ref(true) // 默认显示调试面板
const debugInfo = ref({
  windowHeight: 0,
  viewportHeight: 0,
  safeAreaBottom: '0',
  tabbarHeight: 0,
  tabbarBottom: 0,
  tabbarTop: 0,
  tabbarPaddingBottom: '0',
  tabbarPosition: '',
  tabbarBottomStyle: '',
  tabbarMinHeight: '',
  tabbarBoxSizing: '',
  appRootHeight: 0
})

// 更新调试信息
const updateDebugInfo = () => {
  debugInfo.value.windowHeight = window.innerHeight
  debugInfo.value.viewportHeight = window.visualViewport?.height || window.innerHeight
  
  // 获取安全区域底部值
  const testDiv = document.createElement('div')
  testDiv.style.paddingBottom = 'env(safe-area-inset-bottom, 0px)'
  document.body.appendChild(testDiv)
  const computed = window.getComputedStyle(testDiv)
  debugInfo.value.safeAreaBottom = computed.paddingBottom
  document.body.removeChild(testDiv)
  
  // 获取 TabBar 的实际尺寸和位置
  const tabbar = document.querySelector('.van-tabbar')
  if (tabbar) {
    const rect = tabbar.getBoundingClientRect()
    const styles = window.getComputedStyle(tabbar)
    debugInfo.value.tabbarHeight = rect.height.toFixed(2)
    debugInfo.value.tabbarBottom = rect.bottom.toFixed(2)
    debugInfo.value.tabbarPaddingBottom = styles.paddingBottom
    debugInfo.value.tabbarTop = rect.top.toFixed(2)
    debugInfo.value.tabbarPosition = styles.position
    debugInfo.value.tabbarBottomStyle = styles.bottom
    debugInfo.value.tabbarMinHeight = styles.minHeight
    debugInfo.value.tabbarBoxSizing = styles.boxSizing
  }
  
  // 获取 app-root 的高度
  const appRoot = document.querySelector('.app-root')
  if (appRoot) {
    const rect = appRoot.getBoundingClientRect()
    debugInfo.value.appRootHeight = rect.height.toFixed(2)
  }
}

onMounted(() => {
  // 延迟获取调试信息，确保 DOM 已渲染
  setTimeout(updateDebugInfo, 500)
  // 每秒更新一次调试信息
  const debugInterval = setInterval(updateDebugInfo, 1000)
  
  onUnmounted(() => {
    clearInterval(debugInterval)
  })
})
</script>

<style scoped>
.app-provider {
  /* 使用准确的视口高度 CSS 变量 */
  height: var(--vh, 100vh);
  width: 100%;
  background-color: var(--van-background);
}

.app-root {
  height: 100%;
  width: 100%;
  position: relative;
  padding-top: max(0px, calc(env(safe-area-inset-top, 0px) * 0.75));
  box-sizing: border-box;
  overflow: hidden;
  background-color: var(--van-background);
}

/* TabBar 固定在底部 */
:deep(.van-tabbar) {
  position: fixed !important;
  bottom: 0 !important;
  left: 0;
  right: 0;
  /* 重置所有 padding，然后只添加安全区域 */
  padding: 0 !important;
  padding-bottom: env(safe-area-inset-bottom, 0px) !important;
  height: calc(50px + env(safe-area-inset-bottom, 0px)) !important;
  box-sizing: border-box !important;
  background: var(--bg-primary) !important;
  border-top: 1px solid var(--bg-tertiary);
}

/* 确保 TabBar 项目居中 */
:deep(.van-tabbar-item) {
  padding: 0 !important;
  height: 50px !important;
  color: var(--text-secondary);
}

:deep(.van-tabbar-item--active) {
  color: var(--color-primary);
}

.debug-overlay {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 10px;
  font-size: 12px;
  pointer-events: auto;
}

.update-toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--van-primary-color);
  color: white;
  padding: 10px 20px;
  border-radius: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 2000;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.update-toast:active {
  transform: translateX(-50%) scale(0.95);
}

.update-icon {
  font-size: 18px;
}

/* 调试面板样式 */
.debug-panel {
  position: fixed;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.9);
  color: #fff;
  padding: 12px;
  border-radius: 8px;
  font-size: 10px;
  z-index: 9999;
  min-width: 240px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  font-family: 'Courier New', monospace;
}

.debug-title {
  font-weight: bold;
  margin-bottom: 10px;
  border-bottom: 2px solid rgba(255, 255, 255, 0.5);
  padding-bottom: 6px;
  font-size: 11px;
  color: #4fc3f7;
}

.debug-section {
  margin: 8px 0;
  padding: 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  border-left: 3px solid #4fc3f7;
}

.debug-subtitle {
  font-weight: bold;
  margin-bottom: 4px;
  font-size: 10px;
  color: #81c784;
}

.debug-item {
  margin: 3px 0;
  line-height: 1.5;
  padding-left: 8px;
}

.debug-close {
  margin-top: 10px;
  padding: 6px 12px;
  background: linear-gradient(135deg, #ff4d4f, #ff7875);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 11px;
  width: 100%;
  font-weight: bold;
  box-shadow: 0 2px 4px rgba(255, 77, 79, 0.3);
}

.debug-close:active {
  opacity: 0.8;
  transform: scale(0.98);
}
</style>
