<template>
  <div class="common-card budget-card" @click="$emit('click')">
    <div class="budget-content-wrapper">
      <Transition :name="transitionName">
        <div :key="budget.period" class="budget-inner-card">
          <div class="card-header">
            <div class="budget-info">
              <h3 class="card-title">{{ budget.name }}</h3>
              <slot name="tag">
                <van-tag 
                  :type="budget.type ===  BudgetPeriodType.Year ? 'warning' : 'primary'"
                  plain
                  class="status-tag"
                >
                  {{ budget.type ===  BudgetPeriodType.Year ? '年度' : '月度' }}
                </van-tag>
              </slot>
            </div>
            <div class="header-actions">
              <slot name="actions">
                <van-button 
                  v-if="budget.description"
                  :icon="showDescription ? 'info' : 'info-o'" 
                  size="mini" 
                  :type="showDescription ? 'primary' : 'default'"
                  plain 
                  round
                  style="margin-right: 4px;"
                  @click.stop="showDescription = !showDescription" 
                />
                <van-button 
                  v-if="budget.category !== 2"
                  :icon="budget.isStopped ? 'play' : 'pause'" 
                  size="mini" 
                  plain 
                  round
                  @click.stop="$emit('toggle-stop', budget)" 
                />
              </slot>
            </div>
          </div>
          
          <div class="budget-body">
            <div class="amount-info">
              <slot name="amount-info"></slot>
            </div>

            <div class="progress-section">
              <slot name="progress-info">
                <span class="period-type">{{ periodLabel }}{{ budget.category === 0 ? '使用' : '达成' }}</span>
                <van-progress 
                  :percentage="Math.min(percentage, 100)" 
                  stroke-width="8"
                  :color="progressColor"
                  :show-pivot="false"
                />
                <span class="percent" :class="percentClass">{{ percentage }}%</span>
              </slot>
            </div>
            <div class="progress-section time-progress">
              <span class="period-type">时间进度</span>
              <van-progress 
                :percentage="timePercentage" 
                stroke-width="4"
                color="#969799"
                :show-pivot="false"
              />
              <span class="percent">{{ timePercentage }}%</span>
            </div>

            <van-collapse-transition>
              <div v-if="budget.description && showDescription" class="budget-description">
                <div class="description-content" v-html="budget.description"></div>
              </div>
            </van-collapse-transition>
          </div>

          <div class="card-footer">
            <div class="period-navigation" @click.stop>
              <van-button 
                icon="arrow-left" 
                class="nav-icon"
                plain 
                size="small"
                style="width: 50px;"
                @click="handleSwitch(-1)" 
              />
              <span class="period-text">{{ budget.period }}</span>
              <van-button 
                icon="arrow" 
                class="nav-icon"
                plain 
                size="small"
                style="width: 50px;"
                :disabled="isNextDisabled"
                @click="handleSwitch(1)"
              />
            </div>
          </div>
        </div>
      </Transition>
    </div>
  </div>
</template>

<script setup>
import { computed, ref } from 'vue'
import { BudgetPeriodType } from '@/constants/enums'

const props = defineProps({
  budget: {
    type: Object,
    required: true
  },
  progressColor: {
    type: String,
    default: '#1989fa'
  },
  percentClass: {
    type: [String, Object],
    default: ''
  },
  periodLabel: {
    type: String,
    default: ''
  }
})

const emit = defineEmits(['toggle-stop', 'switch-period', 'click'])

const transitionName = ref('slide-left')
const showDescription = ref(false)

const isNextDisabled = computed(() => {
  if (!props.budget.periodEnd) return false
  return new Date(props.budget.periodEnd) > new Date()
})

const handleSwitch = (direction) => {
  transitionName.value = direction > 0 ? 'slide-left' : 'slide-right'
  emit('switch-period', direction)
}

const percentage = computed(() => {
  if (!props.budget.limit) return 0
  return Math.round((props.budget.current / props.budget.limit) * 100)
})

const timePercentage = computed(() => {
  if (!props.budget.periodStart || !props.budget.periodEnd) return 0
  const start = new Date(props.budget.periodStart).getTime()
  const end = new Date(props.budget.periodEnd).getTime()
  const now = new Date().getTime()
  
  if (now <= start) return 0
  if (now >= end) return 100
  
  return Math.round(((now - start) / (end - start)) * 100)
})
</script>

<style scoped>
.budget-card {
  margin-left: 0;
  margin-right: 0;
  margin-bottom: 0;
  padding-bottom: 8px;
  overflow: hidden;
  position: relative;
}

.budget-content-wrapper {
  position: relative;
  width: 100%;
}

.budget-inner-card {
  width: 100%;
}

/* 切换动画 */
.slide-left-enter-active,
.slide-left-leave-active,
.slide-right-enter-active,
.slide-right-leave-active {
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-left-enter-from {
  transform: translateX(100%);
  opacity: 0;
}
.slide-left-leave-to {
  transform: translateX(-100%);
  opacity: 0;
}

.slide-right-enter-from {
  transform: translateX(-100%);
  opacity: 0;
}
.slide-right-leave-to {
  transform: translateX(100%);
  opacity: 0;
}

.slide-left-leave-active,
.slide-right-leave-active {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
}

.budget-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.header-actions {
  display: flex;
  gap: 8px;
}

.amount-info {
  display: flex;
  justify-content: space-between;
  margin: 12px 0;
  text-align: center;
}

:deep(.info-item) .label {
  font-size: 12px;
  color: #969799;
  margin-bottom: 2px;
}

:deep(.info-item) .value {
  font-size: 15px;
  font-weight: 600;
}

:deep(.value.expense) {
  color: #ee0a24;
}

:deep(.value.income) {
  color: #07c160;
}

.progress-section {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 13px;
  color: #646566;
}

.progress-section :deep(.van-progress) {
  flex: 1;
}

.period-type {
  white-space: nowrap;
  width: 65px;
}

.percent {
  white-space: nowrap;
  width: 35px;
  text-align: right;
}

.percent.warning {
  color: #ff976a;
  font-weight: bold;
}

.percent.income {
  color: #07c160;
  font-weight: bold;
}

.time-progress {
  margin-top: -8px;
  opacity: 0.8;
}

.time-progress .period-type,
.time-progress .percent {
  font-size: 11px;
}

.budget-description {
  margin-top: 8px;
  background-color: #f7f8fa;
  border-radius: 4px;
  padding: 8px;
}

.description-content {
  font-size: 11px;
  color: #646566;
  line-height: 1.4;
}

.description-content :deep(h3) {
  margin: 12px 0 6px;
  font-size: 13px;
  color: #323233;
  border-left: 3px solid #1989fa;
  padding-left: 8px;
}

.description-content :deep(table) {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0;
  background: #fff;
  border-radius: 4px;
  overflow: hidden;
}

.description-content :deep(th),
.description-content :deep(td) {
  text-align: left;
  padding: 6px 4px;
  border-bottom: 1px solid #f2f3f5;
}

.description-content :deep(th) {
  background-color: #f7f8fa;
  color: #969799;
  font-weight: normal;
  font-size: 10px;
}

.description-content :deep(p) {
  margin: 4px 0;
}

.description-content :deep(.income-value) {
  color: #07c160;
}

.description-content :deep(.expense-value) {
  color: #ee0a24;
}

.description-content :deep(.highlight) {
  background-color: #fffbe6;
  color: #ed6a0c;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: bold;
  border: 1px solid #ffe58f;
}

@media (prefers-color-scheme: dark) {
  .description-content :deep(h3) {
    color: #f5f5f5;
  }
  .description-content :deep(table) {
    background: #1a1a1a;
  }
  .description-content :deep(th) {
    background-color: #242424;
  }
  .description-content :deep(td) {
    border-bottom-color: #2c2c2c;
  }
  .description-content :deep(.highlight) {
    background-color: #3e371a;
    color: #ff976a;
    border-color: #594a1a;
  }
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #969799;
  padding: 12px 12px 0;
  padding-top: 8px;
  border-top: 1px solid #ebedf0;
}

.period-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.period-text {
  font-size: 14px;
  font-weight: 500;
  color: #323233;
}

.nav-icon {
  padding: 4px;
  font-size: 12px;
  color: #1989fa;
}

@media (prefers-color-scheme: dark) {
  .card-footer {
    border-top-color: #2c2c2c;
  }
  .period-text {
    color: #f5f5f5;
  }
  .budget-description {
    background-color: #2c2c2c;
  }
  .description-content {
    color: #969799;
  }
}
</style>
