<template>
  <div class="reply-tree">
    <div
      v-for="reply in replies"
      :key="reply.id"
      class="reply-item"
      :class="{ 'nested-reply': level > 0 }"
      :style="{ marginLeft: level * 24 + 'px' }"
    >
      <div class="reply-header">
        <div class="reply-author">
          <el-avatar :size="Math.max(32 - level * 2, 22)">
            {{ reply.user?.username?.charAt(0) || 'A' }}
          </el-avatar>
          <span class="author-name">{{ reply.user?.username || '匿名' }}</span>
        </div>
        <div class="reply-meta">
          <div class="reply-actions">
            <el-button 
              type="text" 
              :size="level > 0 ? 'small' : 'default'" 
              @click="$emit('reply', reply)"
            >
              回复
            </el-button>
            <template v-if="reply.isAuthor">
              <el-button 
                type="text" 
                :size="level > 0 ? 'small' : 'default'" 
                @click="$emit('edit', reply)"
              >
                编辑
              </el-button>
              <el-button 
                type="text" 
                :size="level > 0 ? 'small' : 'default'" 
                @click="$emit('delete', reply.id)"
              >
                删除
              </el-button>
            </template>
          </div>
        </div>
      </div>
      <div class="reply-content" v-html="reply.content"></div>
      
      <!-- 递归显示子回复 -->
      <ReplyTree
        v-if="reply.replies?.length"
        :replies="reply.replies"
        :level="level + 1"
        @reply="$emit('reply', $event)"
        @edit="$emit('edit', $event)"
        @delete="$emit('delete', $event)"
      />
    </div>
  </div>
</template>

<script>


export default {
  name: 'ReplyTree',
  props: {
    replies: {
      type: Array,
      required: true
    },
    level: {
      type: Number,
      default: 0
    }
  },
  emits: ['reply', 'edit', 'delete'],
  setup() {


    return {}
  }
}
</script>

<style lang="scss" scoped>
.reply-tree {
  .reply-item {
    padding: 12px 0;
    border-bottom: 1px solid #f0f0f0;
    
    &:last-child {
      border-bottom: none;
    }
    
    &.nested-reply {
      border-left: 2px solid #e0e0e0;
      padding-left: 12px;
      margin-top: 8px;
      
      &:hover {
        border-left-color: #3498db;
      }
    }
    
    .reply-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 8px;
      
      .reply-author {
        display: flex;
        align-items: center;
        gap: 8px;
        
        .author-name {
          font-weight: 500;
          color: #2c3e50;
          font-size: 14px;
        }
      }
      
      .reply-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        color: #7f8c8d;
        font-size: 12px;
        
        .reply-actions {
          display: flex;
          gap: 6px;
        }
      }
    }
    
    .reply-content {
      font-size: 14px;
      line-height: 1.6;
      color: #2c3e50;
      margin-bottom: 8px;
    }
  }
}
</style>