<script setup>
  import { ref, reactive, onMounted, onBeforeUnmount } from 'vue'
  //i18n
  import { useI18n } from 'vue-i18n'
  const {t} =useI18n()  
  const props = defineProps({
    options:Object,
    loading: Boolean,
  })
  
  const emit = defineEmits(['leave'])
  
  const moveX = ref(0)
  
  const loaded = ref(false)
  const isDragging = ref(false)
  const isVerifying = ref(false)
  const maxMoveX = ref(0)
  const bgImage = ref(null)
  
  const verifyStatus = reactive({
    show: false,
    type: '',
    message: ''
  })
  
  const dragState = reactive({
    startX: 0,
    oldMoveX: 0
  })
  
  const onImageLoad = () => {
    if (!bgImage.value?.complete) return
    
    const img = bgImage.value
    const scale = img.width / img.naturalWidth
    const blockSize = Math.round(50 * scale)
    maxMoveX.value = img.width - blockSize
    loaded.value = true
  }
  
  const onImageError = () => {
    console.error('Image failed to load')
    maxMoveX.value = 270
    loaded.value = true
  }
  
  // 拖动处理
  const startDrag = (e) => {
    isDragging.value = true
    dragState.startX = e.touches?.[0].clientX ?? e.clientX
    dragState.oldMoveX = moveX.value
  }
  
  const onDrag = (e) => {
    if (!isDragging.value) return
    
    const clientX = e.touches?.[0].clientX ?? e.clientX
    let newMoveX = dragState.oldMoveX + (clientX - dragState.startX)
    
    moveX.value = Math.max(0, Math.min(newMoveX, maxMoveX.value))
  }
  
  const endDrag = async () => {
    if (!isDragging.value) return
    
    isDragging.value = false
    isVerifying.value = true
    
    try {
      emit('leave', moveX.value, (success) => {
        showVerifyResult(success)
      })
    } catch (error) {
      showVerifyResult(false)
    }
  }
  
  // 验证结果展示
  const showVerifyResult = (success) => {
    verifyStatus.show = true
    verifyStatus.type = success ? 'success' : 'error'
    verifyStatus.message = success ? t('components.form.verifySuccess') : t('components.form.verifyFailed')
    isVerifying.value = false
    setTimeout(() => {
      verifyStatus.show = false
      verifyStatus.message = ''
      moveX.value = 0
    }, 1500)
  }
  
  // 事件监听
  onMounted(() => {
    window.addEventListener('mousemove', onDrag)
    window.addEventListener('mouseup', endDrag)
    window.addEventListener('touchmove', onDrag)
    window.addEventListener('touchend', endDrag)
  })
  
  onBeforeUnmount(() => {
    window.removeEventListener('mousemove', onDrag)
    window.removeEventListener('mouseup', endDrag)
    window.removeEventListener('touchmove', onDrag)
    window.removeEventListener('touchend', endDrag)
  })
  </script>
  <template>
    <div class="m-auto bg-white p-15px rd-10px touch-none select-none">
      <div class="relative w-full overflow-hidden bg-#f8f8f8 rd-10px"   :style="{ width: `${options?.canvasWidth}px`, height: `${options?.canvasHeight}px` }">
        <!-- 加载状态 -->
        <div v-if="loading" class="absolute inset-0 flex flex-col items-center justify-center bg-#f8f8f8">
          <div class="fancy-loader">
            <div class="fancy-loader-bar"></div>
            <div class="fancy-loader-bar"></div>
            <div class="fancy-loader-bar"></div>
            <div class="fancy-loader-bar"></div>
          </div>
        </div>
        
        <!-- 背景图 -->
        <img
          v-else
          :src="options?.canvasSrc"
          class="pointer-events-none w-full h-full"
          ref="bgImage"
          @load="onImageLoad"
          @error="onImageError"
        >

        <!-- 滑块 -->
        <img 
          :src="options?.blockSrc"
          class="absolute cursor-pointer will-change-transform transform-gpu"
          v-if="!loading"
          :class="{ 'transition-all duration-300 ease-out': !isDragging }"
          :style="{
            top: `${options?.blockY}px`,
            left: `${moveX}px`,
            visibility: loaded ? 'visible' : 'hidden',
            width: `${options?.blockWidth}px`, height: `${options?.blockHeight}px`
          }"
        >
        <transition name="fade-slide">
          <div 
            v-if="verifyStatus.show" 
            class="absolute left-0 bottom-0 w-full h-25px leading-25px text-center text-14px text-white"
            :class="verifyStatus.type === 'success' ? 'bg-#52c41a' : 'bg-#ff4d4f'"
          >
            {{ verifyStatus.message }}
          </div>
        </transition>
      </div>
      
      <!-- 滑动条 -->
      <div class="relative mt-15px h-40px">
        <div class="relative h-40px bg-#f5f5f5 rd-20px">
          <div 
            class="absolute h-full bg-#91d5ff rd-20px"
            :class="{ 'transition-all duration-300 ease-out': !isDragging }"
            :style="{ width: `${moveX}px` }"
          ></div>
          <div 
            class="absolute top-0 w-40px h-40px bg-white rd-full shadow-[0_2px_6px_rgba(0,0,0,0.15)] cursor-pointer will-change-transform"
            :class="{ 'transition-all duration-300 ease-out': !isDragging }"
            :style="{ left: `${moveX}px` }"
            @mousedown.prevent="startDrag"
            @touchstart.prevent="startDrag"
          >
            <div 
              class="absolute top-50% left-50% translate--50% w-20px h-20px bg-#1890ff rd-full"
              :class="{ 'animate-loading': isVerifying }"
            ></div>
          </div>
        </div>
      </div>
    </div>
  </template>
  <style>
  @keyframes loading {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
  }
  
  .animate-loading {
    animation: loading 1s linear infinite;
  }
  
  /* 添加过渡动画样式 */
  .fade-slide-enter-active,
  .fade-slide-leave-active {
    transition: all 0.3s ease;
  }
  
  .fade-slide-enter-from,
  .fade-slide-leave-to {
    transform: translateY(100%);
    opacity: 0;
  }
  
  /* 加载动画样式 */
  .fancy-loader {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    width: 60px;
    height: 40px;
  }
  
  .fancy-loader-bar {
    width: 6px;
    height: 15px;
    margin: 0 3px;
    background-color: #1890ff;
    border-radius: 3px;
    animation: fancy-loading 1s ease-in-out infinite;
  }
  
  .fancy-loader-bar:nth-child(1) {
    animation-delay: 0s;
  }
  
  .fancy-loader-bar:nth-child(2) {
    animation-delay: 0.2s;
  }
  
  .fancy-loader-bar:nth-child(3) {
    animation-delay: 0.4s;
  }
  
  .fancy-loader-bar:nth-child(4) {
    animation-delay: 0.6s;
  }
  
  @keyframes fancy-loading {
    0% {
      transform: scaleY(0.5);
      opacity: 0.5;
    }
    50% {
      transform: scaleY(1.2);
      opacity: 1;
    }
    100% {
      transform: scaleY(0.5);
      opacity: 0.5;
    }
  }
  
  /* 保留原有的spin动画，用于其他地方 */
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  </style>