<template>
  <div class="horizontal-broadcast-container" v-if="shouldShowBroadcast">
    <!-- 广播标题区域 -->
    <div class="broadcast-header" v-if="showTitle">
      <i class="iconfont icon-tishishuoming" v-if="showIcon"></i>
      <span class="broadcast-title">{{ $t('home.describeTitle') }}</span>
    </div>
    
    <!-- 横向滚动区域 -->
    <div 
      class="horizontal-scroll-wrapper"
      :class="{ 'is-hovering': isHovering, 'full-width': !showTitle }"
      @mouseenter="stopHorizontalScroll"
      @mouseleave="resumeHorizontalScroll"
      @touchstart="stopHorizontalScroll"
      @touchend="startHorizontalScrollDelayed"
      :title="isHovering ? $t(`backendSystem.broadcastPause`) || '广播已暂停，移开鼠标继续滚动' : $t(`backendSystem.broadcastResume`) || '鼠标悬停可暂停滚动'"
    >
      <div 
        class="horizontal-scroll-content" 
        :style="horizontalScrollStyle"
        ref="horizontalScrollContent"
      >
        <div
          v-for="(item, index) in broadcastListForHorizontal"
          :key="item.id + '-horizontal-' + index"
          class="horizontal-broadcast-item"
          @click="handleItemClick(item)"
        >
          <span class="horizontal-item-content">{{ item.content }}</span>
      
          
          <!-- 动态渲染多个按钮 -->
          <div class="button-group" v-if="item.buttonContent && item.buttonContent.length > 0">
            <span
              v-for="(buttonText, buttonIndex) in item.buttonContent"
              :key="`button-${item.id}-${buttonIndex}`"
              class="view"
              @click.stop="handelJump(item.buttonPath[buttonIndex])"
            >
              {{ buttonText || $t(`home.view`) }}
            </span>
          </div>
          
          <span class="horizontal-item-separator" v-if="index < broadcastListForHorizontal.length - 1">•</span>
          
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { getBroadcast } from '../api/broadcast'

export default {
  name: 'HorizontalBroadcast',
  props: {
    // 广播数据，如果不传则自动获取
    broadcastData: {
      type: Array,
      default: () => []
    },
    // 是否显示标题
    showTitle: {
      type: Boolean,
      default: true
    },
    // 是否显示图标
    showIcon: {
      type: Boolean,
      default: true
    },
    // 自定义标题
    title: {
      type: String,
      default: ''
    },
    // 滚动速度 (px/step)
    scrollSpeed: {
      type: Number,
      default: 1
    },
    // 滚动间隔 (ms)
    scrollInterval: {
      type: Number,
      default: 50
    },
    // 是否自动获取数据
    autoFetch: {
      type: Boolean,
      default: true
    },
    // 获取数据的语言参数
    lang: {
      type: String,
      default: 'zh'
    },
    // 最小显示条数（少于此数不显示组件）
    minItems: {
      type: Number,
      default: 1
    },
    // 组件高度
    height: {
      type: String,
      default: '40px'
    },
    // 是否启用点击事件
    clickable: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      // 内部广播数据
      internalBroadcastList: [],
      // 横向滚动相关
      horizontalScrollTimer: null,
      horizontalDelayTimer: null,
      horizontalScrollOffset: 0,
      isHorizontalScrolling: true,
      // hover状态控制
      isHovering: false,
      wasScrollingBeforeHover: true,
      // 组件状态
      isLoading: false,
      hasError: false,
    }
  },
  computed: {
    // 最终使用的广播数据
    finalBroadcastList() {
      let sourceData = this.broadcastData.length > 0 
        ? this.broadcastData 
        : this.internalBroadcastList;
      

      
      // 统一处理数据格式转换
      const processedData = sourceData.map(item => {
        const processedItem = { ...item };
        

        
        // 处理 buttonContent：如果是字符串则分割为数组
        if (typeof processedItem.buttonContent === 'string' && processedItem.buttonContent.trim()) {
          processedItem.buttonContent = processedItem.buttonContent
            .split(/[,，]\s*/) // 支持中英文逗号，后面可能跟空格
            .map(btn => btn.trim())
            .filter(btn => btn); // 过滤空字符串
        } else if (!Array.isArray(processedItem.buttonContent)) {
          processedItem.buttonContent = [];
        }
        
        // 处理 buttonPath：如果是字符串则分割为数组
        if (typeof processedItem.buttonPath === 'string' && processedItem.buttonPath.trim()) {
          processedItem.buttonPath = processedItem.buttonPath
            .split(/[,，]\s*/) // 支持中英文逗号，后面可能跟空格
            .map(path => path.trim())
            .filter(path => path); // 过滤空字符串
        } else if (!Array.isArray(processedItem.buttonPath)) {
          processedItem.buttonPath = [];
        }
        
        // 只有当两个数组都有内容时才进行长度校验
        if (processedItem.buttonContent.length > 0 && processedItem.buttonPath.length > 0) {
          // 确保两个数组长度一致，以较短的为准
          const minLength = Math.min(
            processedItem.buttonContent.length, 
            processedItem.buttonPath.length
          );
          
          processedItem.buttonContent = processedItem.buttonContent.slice(0, minLength);
          processedItem.buttonPath = processedItem.buttonPath.slice(0, minLength);
        }
        

        
        return processedItem;
      });
      

      return processedData;
    },
    
    // 是否应该显示广播组件
    shouldShowBroadcast() {
      return this.finalBroadcastList.length >= this.minItems && !this.hasError;
    },
    
    // 横向滚动用的数据（复制数据实现无缝循环）
    broadcastListForHorizontal() {
      const list = this.finalBroadcastList;

      
      if (list.length === 0) return [];
      
      let result;
      if (list.length === 1) {
        // 单条数据时复制多次以实现连续滚动
        result = Array(3).fill().map((_, idx) => ({
          ...list[0],
          id: list[0].id + '-copy-' + idx
        }));
      } else {
        // 多条数据时在末尾添加第一条实现无缝循环
        result = [...list, list[0]];
      }
      

      return result;
    },
    
    // 横向滚动样式
    horizontalScrollStyle() {
      return {
        transform: `translateX(-${this.horizontalScrollOffset}px)`,
        transition: this.isHorizontalScrolling ? 'none' : 'transform 0.3s ease',
      };
    },
  
  },
  watch: {
    // 监听外部数据变化
    broadcastData: {
      handler(newData) {
        if (newData && newData.length > 0) {
          this.resetScroll();
        }
      },
      deep: true,
      immediate: true
    },
    // 监听滚动参数变化
    scrollSpeed(newSpeed) {
      this.horizontalScrollSpeed = newSpeed;
    },
    scrollInterval(newInterval) {
      this.horizontalScrollInterval = newInterval;
      if (this.isHorizontalScrolling) {
        this.restartScroll();
      }
    }
  },
  mounted() {

    
    // 如果没有外部数据且允许自动获取，则获取数据
    if (this.autoFetch && this.broadcastData.length === 0) {
      this.fetchBroadcastData();
    }
    
    // 启动滚动
    this.$nextTick(() => {
      this.startHorizontalScroll();
    });
  },
  methods: {
    /**
     * 获取广播数据
     */
    async fetchBroadcastData() {
      if (this.isLoading) return;
      
      try {
        this.isLoading = true;
        this.hasError = false;
        
        const data = await getBroadcast({ lang: this.lang || (this.$i18n ? this.$i18n.locale : 'zh') });
        
        if (data && data.code === 200 && Array.isArray(data.data)) {
          this.internalBroadcastList = data.data;
          

          
          this.resetScroll();
          this.$emit('data-loaded', data.data);
        } else {
          this.hasError = true;
          this.$emit('error', '获取广播数据失败');
        }
      } catch (error) {
        console.error('获取广播数据失败:', error);
        this.hasError = true;
        this.$emit('error', error);
      } finally {
        this.isLoading = false;
      }
    },

    /**
     * 开始横向滚动
     */
    startHorizontalScroll() {
      // 如果正在hover或数据不足，不启动滚动
      if (this.isHovering || this.finalBroadcastList.length <= 1) return;
      
      if (this.horizontalScrollTimer) {
        clearInterval(this.horizontalScrollTimer);
      }

      this.isHorizontalScrolling = true;
      this.horizontalScrollTimer = setInterval(() => {
        this.horizontalScrollStep();
      }, this.scrollInterval);
    },

    /**
     * 停止横向滚动
     */
    stopHorizontalScroll() {
      this.wasScrollingBeforeHover = this.isHorizontalScrolling;
      this.isHovering = true;
      
      if (this.horizontalScrollTimer) {
        clearInterval(this.horizontalScrollTimer);
        this.horizontalScrollTimer = null;
      }
      this.isHorizontalScrolling = false;
    },

    /**
     * 鼠标移开时恢复滚动
     */
    resumeHorizontalScroll() {
      this.isHovering = false;
      
      if (this.wasScrollingBeforeHover && this.finalBroadcastList.length > 1) {
        setTimeout(() => {
          if (!this.isHovering) {
            this.startHorizontalScroll();
          }
        }, 100);
      }
    },
    handelJump(url) {
        const lang = this.$i18n.locale;
        
        /**
         * 处理单个路径跳转
         * @param {string} path - 路径
         */
        const handleSinglePath = (path) => {
            if (!path || typeof path !== 'string') {
                console.warn('无效的路径:', path);
                return;
            }
            
            // 清理路径
            const cleanPath = path.trim();
            if (!cleanPath) {
                console.warn('路径为空');
                return;
            }
            
            let targetPath;
            
            // 如果是主页路径
            if (cleanPath === '/' || cleanPath === '') {
                targetPath = `/${lang}/`;
            } else {
                // 其他路径：去掉开头的斜杠（如果有的话）
                const pathWithoutSlash = cleanPath.startsWith('/') ? cleanPath.substring(1) : cleanPath;
                targetPath = `/${lang}/${pathWithoutSlash}`;
            }
            
            console.log('跳转路径:', targetPath);
            
            try {
                // 在当前页面跳转
                this.$router.push(targetPath);
            } catch (error) {
                console.error('路由跳转失败:', error);
                // 如果路由跳转失败，尝试直接跳转
                window.location.href = targetPath;
            }
        };

        // 处理传入的路径
        if (url) {
            handleSinglePath(url);
        } else {
            console.warn('未提供跳转路径');
        }
    },

    /**
     * 延迟启动横向滚动（移动端触摸后）
     */
    startHorizontalScrollDelayed() {
      if (this.horizontalDelayTimer) {
        clearTimeout(this.horizontalDelayTimer);
      }
      this.horizontalDelayTimer = setTimeout(() => {
        this.resumeHorizontalScroll();
      }, 1000);
    },

    /**
     * 横向滚动步进
     */
    horizontalScrollStep() {
      if (!this.$refs.horizontalScrollContent) return;

      const contentElement = this.$refs.horizontalScrollContent;
      const contentWidth = contentElement.scrollWidth;
      
      // 计算单个循环的宽度
      const singleCycleWidth = contentWidth / this.broadcastListForHorizontal.length * this.finalBroadcastList.length;
      
      this.horizontalScrollOffset += this.scrollSpeed;
      
      // 当滚动超过单个循环宽度时，重置到开始位置实现无缝循环
      if (this.horizontalScrollOffset >= singleCycleWidth) {
        this.horizontalScrollOffset = 0;
      }
    },

    /**
     * 重置滚动
     */
    resetScroll() {
      this.horizontalScrollOffset = 0;
      this.$nextTick(() => {
        if (this.finalBroadcastList.length > 1) {
          this.startHorizontalScroll();
        }
      });
    },

    /**
     * 重启滚动
     */
    restartScroll() {
      this.stopHorizontalScroll();
      this.$nextTick(() => {
        this.startHorizontalScroll();
      });
    },

    /**
     * 广播项点击事件
     */
    handleItemClick(item) {
      if (this.clickable) {
        this.$emit('item-click', item);
      }
    },

    /**
     * 手动刷新数据
     */
    refresh() {
      if (this.autoFetch) {
        this.fetchBroadcastData();
      } else {
        this.resetScroll();
      }
    },

    /**
     * 暂停/继续滚动
     */
    togglePause() {
      if (this.isHorizontalScrolling) {
        this.stopHorizontalScroll();
      } else {
        this.resumeHorizontalScroll();
      }
    },

    /**
     * 获取组件状态
     */
    getStatus() {
      return {
        isScrolling: this.isHorizontalScrolling,
        isHovering: this.isHovering,
        currentOffset: this.horizontalScrollOffset,
        dataCount: this.finalBroadcastList.length,
        isLoading: this.isLoading,
        hasError: this.hasError
      };
    }
  },
  beforeDestroy() {
    // 清理定时器
    if (this.horizontalScrollTimer) {
      clearInterval(this.horizontalScrollTimer);
    }
    if (this.horizontalDelayTimer) {
      clearTimeout(this.horizontalDelayTimer);
    }
    
    // 重置状态
    this.isHovering = false;
    this.isHorizontalScrolling = false;
  }
}
</script>

<style scoped lang="scss">
/* 横向滚动广播容器 */
.horizontal-broadcast-container {
  width: 100%;
  background: #fff;
 
//   box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  padding: 0px 20px !important;
  position: relative;
  z-index: 100;
 
  background: #E7DFF3;
}

/* 广播标题区域 */
.broadcast-header {
  display: flex;
  align-items: center;
  margin-right: 15px;
  flex-shrink: 0;
  
  i {
    color: #5721e4;
    font-size: 18px;
    margin-right: 8px;
  }
  
  .broadcast-title {
    color: #5721e4;
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
  }
}

/* 横向滚动包装器 */
.horizontal-scroll-wrapper {
  flex: 1;
  overflow: hidden;
  position: relative;
  height: v-bind(height);
//   background: #f8f9fa;
  border-radius: 8px;
//   border: 1px solid #e9ecef;
  cursor: pointer;
  display: flex;
  align-items: center;
  
  &.full-width {
    margin-right: 0;
  }
}

/* 横向滚动内容 */
.horizontal-scroll-content {
  display: flex;
  align-items: center;
  height: 100%;
  white-space: nowrap;
  will-change: transform;
}

/* 横向广播项 */
.horizontal-broadcast-item {
  display: inline-flex;
  align-items: center;
  height: 100%;
  margin-right: 30px;
  flex-shrink: 0;
  font-size: 0.85rem;
  
  .horizontal-item-content {
    color: #333;
    font-size: 14px;
    line-height: 1.4;
    padding: 0 15px;
    white-space: nowrap;
    transition: color 0.3s ease;
    
    // &:hover {
    //   color: #5721e4;
    // }
  }
  
  /* 按钮组样式 */
  .button-group {
    display: inline-flex;
    align-items: center;
    // margin-left: 10px;
    gap: 0px; /* 按钮之间的间距 */
  }
  
  .horizontal-item-separator {
    color: #ccc;
    margin: 0 15px;
    font-size: 12px;
  }
}

/* 滚动暂停时的视觉反馈 */
.horizontal-scroll-wrapper:hover,
.horizontal-scroll-wrapper.is-hovering {
//   background: linear-gradient(135deg, #f0f3ff, #e8f2ff);
  border-color: #5721e4;
//   box-shadow: 0 2px 8px rgba(87, 33, 228, 0.15);
  transition: all 0.3s ease;
}

/* hover状态下的内容样式 */
.horizontal-scroll-wrapper.is-hovering .horizontal-item-content {
//   color: #5721e4;
  font-weight: 500;
  transition: all 0.3s ease;
}

/* 暂停指示器圆点 */
.horizontal-scroll-wrapper.is-hovering::before {
  content: '';
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: #5721e4;
  border-radius: 50%;
  animation: pausePulse 1.5s ease-in-out infinite;
  z-index: 1;
}
.view{
    color: #5721e4;
    // font-size: 0.85rem;
    // margin-left: 5px;
    cursor: pointer;
    padding: 2px 8px;
    border-radius: 4px;
    transition: all 0.3s ease;
    white-space: nowrap;
    border: 1px solid transparent;
    
    &:hover {
      background-color: #5721e4;
      color: #fff;
      border-color: #5721e4;
      transform: translateY(-1px);
    }
    
    &:active {
      transform: translateY(0);
    }
}

@keyframes pausePulse {
  0%, 100% {
    opacity: 0.6;
    transform: translateY(-50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translateY(-50%) scale(1.2);
  }
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
  .horizontal-broadcast-container {
    padding: 8px 15px;
    
    .broadcast-header {
      margin-right: 10px;
      
      i {
        font-size: 16px;
        margin-right: 5px;
      }
      
      .broadcast-title {
        font-size: 12px;
      }
    }
  }
  
  .horizontal-broadcast-item {
    margin-right: 20px;
    
    .horizontal-item-content {
      font-size: 13px;
      padding: 0 10px;
    }
    
    /* 移动端按钮组样式 */
    .button-group {
      margin-left: 5px;
      gap: 5px;
      
      .view {
        font-size: 12px;
        padding: 1px 6px;
        margin-left: 0;
      }
    }
    
    .horizontal-item-separator {
      margin: 0 10px;
    }
  }
  
  .horizontal-scroll-wrapper.is-hovering::before {
    right: 5px;
    width: 4px;
    height: 4px;
  }
}

/* 美化滚动条 */
.horizontal-scroll-wrapper::-webkit-scrollbar {
  display: none;
}
</style> 