<template>
  <div class="search-results">
    <!-- 搜索头部 -->
    <div class="search-header">
      <div class="search-info">
        <h1 class="search-title">
          <Icon icon="tabler:search" class="title-icon" />
          {{ t('Search Results') }}
        </h1>
        <p class="search-subtitle" v-if="query">
          {{ t('Search keyword') }}: "{{ query }}"
        </p>
        <p class="search-subtitle" v-if="!loading && results.length > 0">
          {{ t('Found') }} {{ results.length }} {{ t('relevant results') }}
        </p>
      </div>
    </div>

    <!-- 加载状态 -->
    <div v-if="loading" class="loading-container">
      <n-spin size="large">
        <div class="loading-text">{{ t('Searching...') }}</div>
      </n-spin>
    </div>

    <!-- 搜索结果 -->
    <div v-else-if="results.length > 0" class="results-container">
      <div class="results-grid">
        <div
          v-for="result in results"
          :key="result.id"
          class="result-card"
          @click="handleResultClick(result)"
        >
          <div class="result-header">
            <div class="result-meta">
              <span class="result-type">{{ result.payload.pagetype }}</span>
              <span class="result-score">{{ t('Similarity') }}: {{ Math.round(result.score * 100) }}%</span>
            </div>
            <div class="result-title">
              {{ result.payload.title || result.payload.name }}
            </div>
          </div>
          
          <div class="result-content">
            <p class="result-summary" v-if="result.payload.content">
              {{ truncateText(result.payload.content, 200) }}
            </p>
            <div class="result-tags" v-if="result.payload.category">
              <n-tag size="small" type="info">{{ result.payload.category }}</n-tag>
            </div>
          </div>
          
          <div class="result-footer">
            <span class="result-date" v-if="result.payload.modified">
              {{ formatDate(result.payload.modified) }}
            </span>
            <Icon icon="tabler:arrow-right" class="result-arrow" />
          </div>
        </div>
      </div>
    </div>

    <!-- 无结果状态 -->
    <div v-else-if="!loading && query" class="empty-state">
      <div class="empty-icon">
        <Icon icon="tabler:search-off" />
      </div>
      <h3 class="empty-title">{{ t('No relevant results found') }}</h3>
      <p class="empty-description">
        {{ t('Try using different keywords or check spelling') }}
      </p>
    </div>

    <!-- 初始状态 -->
    <div v-else class="initial-state">
      <div class="initial-icon">
        <Icon icon="tabler:search" />
      </div>
      <h3 class="initial-title">{{ t('Start searching') }}</h3>
      <p class="initial-description">
        {{ t('Enter keywords in the search box above to start searching') }}
      </p>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, watch } from 'vue'
import { useRoute, useRouter } from 'vue-router'
import { NSpin, NTag, useMessage } from 'naive-ui'
import { Icon } from '@iconify/vue'
import { searchText } from '../shared/api/embedding'
import { t, locale } from '../shared/i18n'

const route = useRoute()
const router = useRouter()
const message = useMessage()

// 响应式数据
const query = ref('')
const results = ref<Array<{
  id: string
  score: number
  payload: Record<string, any>
}>>([])
const loading = ref(false)

// 执行搜索
const performSearch = async (searchQuery: string) => {
  if (!searchQuery.trim()) {
    results.value = []
    return
  }

  loading.value = true
  try {
    const response = await searchText(searchQuery, 'knowledge_base', 20, 0.5)
    
    if (response.success && response.data) {
      results.value = response.data
    } else {
      message.error(response.message || t('Search failed'))
      results.value = []
    }
  } catch (error: any) {
    console.error('搜索错误:', error)
    message.error(t('An error occurred during search'))
    results.value = []
  } finally {
    loading.value = false
  }
}

// 监听路由变化
watch(() => route.query.q, (newQuery) => {
  if (newQuery && typeof newQuery === 'string') {
    query.value = newQuery
    performSearch(newQuery)
  }
}, { immediate: true })

// 处理结果点击
const handleResultClick = (result: any) => {
  const { pagetype, name } = result.payload
  if (pagetype && name) {
    router.push(`/app/${pagetype}/${name}`)
  }
}

// 文本截断
const truncateText = (text: string, maxLength: number): string => {
  if (!text) return ''
  if (text.length <= maxLength) return text
  return text.substring(0, maxLength) + '...'
}

// 日期格式化
const formatDate = (dateString: string): string => {
  try {
    const date = new Date(dateString)
    if (locale.value === 'zh-CN') {
      // 中文格式：2025-10-08
      return date.toISOString().split('T')[0]
    } else {
      // 英文格式：Oct 8, 2025
      return date.toLocaleDateString('en-US', {
        year: 'numeric',
        month: 'short',
        day: 'numeric'
      })
    }
  } catch {
    return dateString
  }
}
</script>

<style scoped>
.search-results {
  padding: 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.search-header {
  margin-bottom: 32px;
}

.search-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 28px;
  font-weight: 600;
  color: #1f2937;
  margin: 0 0 8px 0;
}

.title-icon {
  color: #3b82f6;
}

.search-subtitle {
  color: #6b7280;
  font-size: 16px;
  margin: 0;
}

.loading-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

.loading-text {
  margin-top: 16px;
  color: #6b7280;
  font-size: 16px;
}

.results-container {
  margin-top: 24px;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 24px;
}

.result-card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 24px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.result-card:hover {
  border-color: #3b82f6;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
  transform: translateY(-2px);
}

.result-header {
  margin-bottom: 16px;
}

.result-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.result-type {
  background: #f3f4f6;
  color: #374151;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
}

.result-score {
  color: #10b981;
  font-size: 12px;
  font-weight: 500;
}

.result-title {
  font-size: 18px;
  font-weight: 600;
  color: #1f2937;
  line-height: 1.4;
  margin: 0;
}

.result-content {
  margin-bottom: 16px;
}

.result-summary {
  color: #6b7280;
  font-size: 14px;
  line-height: 1.6;
  margin: 0 0 12px 0;
}

.result-tags {
  display: flex;
  gap: 8px;
}

.result-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.result-date {
  color: #9ca3af;
  font-size: 12px;
}

.result-arrow {
  color: #d1d5db;
  transition: color 0.2s ease;
}

.result-card:hover .result-arrow {
  color: #3b82f6;
}

.empty-state,
.initial-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  text-align: center;
}

.empty-icon,
.initial-icon {
  font-size: 64px;
  color: #d1d5db;
  margin-bottom: 24px;
}

.empty-title,
.initial-title {
  font-size: 24px;
  font-weight: 600;
  color: #374151;
  margin: 0 0 12px 0;
}

.empty-description,
.initial-description {
  color: #6b7280;
  font-size: 16px;
  margin: 0;
  max-width: 400px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .search-results {
    padding: 16px;
  }
  
  .results-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .result-card {
    padding: 16px;
  }
  
  .search-title {
    font-size: 24px;
  }
}
</style>
