<template>
  <div class="agent-marketplace">
    <div class="page-header">
      <div class="header-content">
        <div class="header-text">
          <h1>{{ t('Agent Marketplace') }}</h1>
          <p>{{ t('Browse and install agents from Jingrow Agent Marketplace') }}</p>
        </div>
      </div>
    </div>

    <div class="content">
      <div class="search-container">
        <div class="search-bar">
          <n-input
            v-model:value="searchQuery"
            :placeholder="t('Search agents...')"
            clearable
            size="large"
            @keyup.enter="loadAgents"
            class="search-input"
          >
            <template #prefix>
              <n-icon><Icon icon="tabler:search" /></n-icon>
            </template>
          </n-input>
          <n-button type="primary" size="large" @click="loadAgents" class="search-button">
            <template #icon>
              <n-icon><Icon icon="tabler:search" /></n-icon>
            </template>
            {{ t('Search') }}
          </n-button>
        </div>
      </div>

      <div class="agents-section" v-if="!loading && agents.length > 0">
        <!-- 排序控件 -->
        <div class="agents-header">
          <div class="agents-title">
          </div>
          <div class="sort-controls">
            <n-select
              v-model:value="sortBy"
              :options="sortOptions"
              :placeholder="t('Sort by')"
              style="width: 150px"
              @update:value="loadAgents"
            />
          </div>
        </div>
        
        <div class="agents-grid">
          <div v-for="agent in agents" :key="agent.name" class="agent-card">
            <!-- 智能体图标 -->
            <div class="agent-icon" @click="viewAgentDetail(agent)">
              <Icon 
                v-if="agent.icon" 
                :icon="agent.icon" 
                :width="48" 
                :height="48"
                :style="{ color: agent.color || '#6b7280' }"
              />
              <div v-else class="agent-icon-placeholder">
                <n-icon size="48"><Icon icon="hugeicons:robotic" /></n-icon>
              </div>
            </div>
            
            <!-- 智能体信息 -->
            <div class="agent-content">
              <div class="agent-header">
                <div class="agent-title-section">
                  <h3 @click="viewAgentDetail(agent)" class="clickable-title">{{ agent.title || agent.agent_name || agent.name }}</h3>
                  <div class="agent-name" v-if="agent.agent_name">
                    {{ agent.agent_name }}
                  </div>
                </div>
              </div>
              
              <div class="agent-description" v-if="agent.description">
                {{ truncateText(agent.description, 80) }}
              </div>
            </div>

            <div class="agent-actions">
              <n-button type="default" @click="viewAgentDetail(agent)">
                {{ t('View Details') }}
              </n-button>
              <n-button 
                v-if="isAgentInstalled(agent.agent_name || agent.name)"
                type="warning" 
                @click="installAgent(agent)"
              >
                {{ t('Installed') }}
              </n-button>
              <n-button 
                v-else
                type="primary" 
                @click="installAgent(agent)"
              >
                {{ t('Install') }}
              </n-button>
            </div>
          </div>
        </div>
        
        <!-- 分页 -->
        <div class="pagination-container">
          <n-pagination 
            v-model:page="page" 
            :page-count="pageCount" 
            size="large"
            show-size-picker
            :page-sizes="[20, 50, 100]"
            :page-size="pageSize"
            @update:page="loadAgents"
            @update:page-size="handlePageSizeChange"
          />
        </div>
      </div>

      <div v-if="loading" class="loading">
        <n-spin size="large">
          <template #description>{{ t('Loading agents...') }}</template>
        </n-spin>
      </div>

      <div v-if="!loading && agents.length === 0" class="empty">
        <n-empty :description="t('No agents found')">
          <template #icon>
            <n-icon><Icon icon="hugeicons:robotic" /></n-icon>
          </template>
        </n-empty>
      </div>
    </div>
    
    <!-- 安装进度弹窗 -->
    <InstallProgressModal
      v-model="showProgressModal"
      :progress="installProgress"
      :message="installMessage"
      :status="installStatus"
      :installing="installing"
      :title="t('Installing Agent')"
    />
  </div>
</template>

<script setup lang="ts">
import { ref, onMounted, computed, watch } from 'vue'
import { useRouter } from 'vue-router'
import { NInput, NButton, NIcon, NSpin, NEmpty, NSelect, NPagination, useMessage, useDialog } from 'naive-ui'
import { Icon } from '@iconify/vue'
import axios from 'axios'
import { t } from '@/shared/i18n'
import InstallProgressModal from './InstallProgressModal.vue'

const message = useMessage()
const dialog = useDialog()
const router = useRouter()

const searchQuery = ref('')
const loading = ref(false)
const agents = ref<any[]>([])
const total = ref(0)
const page = ref(1)
const pageSize = ref(parseInt(localStorage.getItem('itemsPerPage') || '20'))
const sortBy = ref('creation desc')

// 安装相关状态
const installing = ref(false)
const installProgress = ref(0)
const installMessage = ref('')
const installStatus = ref<'success' | 'error' | 'info'>('info')
const showProgressModal = ref(false)

// 已安装智能体集合
const installedAgentNames = ref<Set<string>>(new Set())

// 排序选项
const sortOptions = computed(() => [
  { label: t('Latest'), value: 'creation desc' },
  { label: t('Oldest'), value: 'creation asc' },
  { label: t('Name A-Z'), value: 'agent_name asc' },
  { label: t('Name Z-A'), value: 'agent_name desc' },
  { label: t('Most Popular'), value: 'modified desc' }
])

// 计算总页数
const pageCount = computed(() => Math.max(1, Math.ceil(total.value / pageSize.value)))

async function loadAgents() {
  loading.value = true
  try {
    const params = new URLSearchParams({
      page: page.value.toString(),
      page_size: pageSize.value.toString(),
      search: searchQuery.value,
      sort_by: sortBy.value
    })
    
    const response = await axios.get(`/jingrow/agent-marketplace?${params}`)
    const data = response.data
    
    // 如果API返回分页数据
    if (data.items) {
      agents.value = data.items
      total.value = data.total || 0
    } else {
      // 兼容旧API格式
      agents.value = data || []
      total.value = agents.value.length
    }
  } catch (error) {
    console.error('Failed to load agents:', error)
    message.error(t('Failed to load agents'))
    agents.value = []
    total.value = 0
  } finally {
    loading.value = false
  }
}

function handlePageSizeChange(newPageSize: number) {
  pageSize.value = newPageSize
  page.value = 1
  localStorage.setItem('itemsPerPage', newPageSize.toString())
  loadAgents()
}

function viewAgentDetail(agent: any) {
  // 跳转到智能体详情页面，传递返回路径
  router.push({
    path: `/agent-marketplace/${agent.name}`,
    query: { returnTo: '/agent-marketplace' }
  })
}

async function installAgent(agent: any) {
  if (!agent.agent_flow && !agent.agent_name) {
    message.error(t('Agent flow data or name is missing'))
    return
  }
  
  // 先检查智能体是否已存在
  try {
    const agentName = agent.agent_name || agent.name
    if (agentName) {
      const checkResponse = await axios.get(`/jingrow/check-agent/${agentName}`)
      
      if (checkResponse.data.exists) {
        // 显示确认对话框
        dialog.warning({
          title: t('Agent already exists'),
          content: t('Agent "{0}" is already installed, do you want to overwrite?').replace('{0}', agentName),
          positiveText: t('Confirm Overwrite'),
          negativeText: t('Cancel'),
          onPositiveClick: () => {
            performInstall(agent)
          }
        })
        return
      }
    }
  } catch (error) {
    console.error('Check agent exists error:', error)
  }
  
  performInstall(agent)
}

async function performInstall(agent: any) {
  try {
    installing.value = true
    installProgress.value = 0
    installMessage.value = t('Preparing installation...')
    installStatus.value = 'info'
    showProgressModal.value = true
    
    // 如果没有流程数据，先获取详情
    let agentFlow = agent.agent_flow
    let agentName = agent.agent_name || agent.name
    
    if (!agentFlow) {
      installMessage.value = t('Fetching agent details...')
      installProgress.value = 20
      
      try {
        const detailResponse = await axios.get(`/jingrow/agent-marketplace/${agent.name}`)
        const detail = detailResponse.data
        agentFlow = detail.agent_flow
        agentName = detail.agent_name || agentName
      } catch (error) {
        throw new Error(t('Failed to fetch agent details'))
      }
    }
    
    if (!agentFlow) {
      throw new Error(t('Agent flow data is missing'))
    }
    
    installProgress.value = 40
    installMessage.value = t('Installing agent...')
    
    // 如果 agent_flow 是字符串，尝试解析为 JSON
    if (typeof agentFlow === 'string') {
      try {
        agentFlow = JSON.parse(agentFlow)
      } catch (e) {
        // 如果解析失败，保持原样
      }
    }
    
    const response = await axios.post('/jingrow/install-agent', {
      agent_name: agentName,
      agent_flow: agentFlow
    }, {
      headers: {
        'Content-Type': 'application/json'
      }
    })
    
    // 更新进度到安装完成
    installProgress.value = 100
    
    if (response.data.success) {
      // 所有步骤完成后才显示成功
      installing.value = false
      installStatus.value = 'success'
      installMessage.value = t('Agent installed successfully!')
      message.success(t('Agent installed successfully'))
      
      // 刷新已安装智能体列表
      loadInstalledAgents()
      
      setTimeout(() => {
        showProgressModal.value = false
      }, 2000)
    } else {
      throw new Error(response.data.error || t('Installation failed'))
    }
    } catch (error: any) {
    console.error('Install agent error:', error)
    installing.value = false
    installStatus.value = 'error'
    installMessage.value = error.response?.data?.detail || error.message || t('Installation failed')
    message.error(error.response?.data?.detail || t('Installation failed'))
    
    setTimeout(() => {
      showProgressModal.value = false
    }, 3000)
  }
}

function truncateText(text: string, maxLength: number): string {
  if (!text) return ''
  if (text.length <= maxLength) return text
  return text.substring(0, maxLength) + '...'
}

// 加载已安装智能体列表
async function loadInstalledAgents() {
  try {
    const response = await axios.get('/jingrow/installed-agent-names')
    if (response.data.success) {
      const agents = response.data.agents || []
      installedAgentNames.value = new Set(agents.map((a: string) => a.toLowerCase()))
    }
  } catch (error) {
    console.error('Load installed agents error:', error)
  }
}

// 检查智能体是否已安装
function isAgentInstalled(agentName: string): boolean {
  if (!agentName) return false
  return installedAgentNames.value.has(agentName.toLowerCase())
}

onMounted(() => {
  loadAgents()
  loadInstalledAgents()
  
  // 监听全局事件
  window.addEventListener('installedAgentsUpdated', () => {
    loadInstalledAgents()
  })
})

// 监听排序变化（搜索改为手动触发）
watch([sortBy], () => {
  page.value = 1 // 重置到第一页
  loadAgents()
}, { deep: true })

// 监听分页变化
watch([page], () => {
  loadAgents()
})

// 监听每页数量变化（从系统设置）
watch(() => localStorage.getItem('itemsPerPage'), (newValue) => {
  if (newValue) {
    pageSize.value = parseInt(newValue)
    page.value = 1 // 重置到第一页
    loadAgents()
  }
})
</script>

<style scoped>
.agent-marketplace {
  padding: 24px;
}

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

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.header-text h1 {
  margin: 0 0 8px 0;
  font-size: 28px;
  font-weight: 700;
  color: #1a1a1a;
}

.header-text p {
  margin: 0;
  color: #666;
  font-size: 16px;
}

.search-container {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.agents-section {
  margin-bottom: 32px;
}

.agents-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.sort-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pagination-container {
  display: flex;
  justify-content: center;
  margin-top: 32px;
  padding: 20px 0;
}

.search-bar {
  display: flex;
  gap: 16px;
  align-items: center;
  max-width: 600px;
  width: 100%;
  padding: 20px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 20px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.search-input {
  flex: 1;
  min-width: 0;
}

.search-input .n-input {
  border-radius: 12px;
  border: 1px solid #d1d5db;
  transition: all 0.2s ease;
}

.search-input .n-input:focus-within {
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-button {
  border-radius: 12px;
  font-weight: 600;
  padding: 0 24px;
  transition: all 0.2s ease;
}

.search-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.agents-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.agent-card {
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  background: white;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.agent-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  border-color: #d1d5db;
}

.agent-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 120px;
  background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
  cursor: pointer;
  padding: 20px;
}

.agent-icon-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: #9ca3af;
}

.agent-content {
  padding: 20px;
}

.agent-header {
  margin-bottom: 12px;
}

.agent-title-section {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.agent-title-section h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: #1f2937;
  line-height: 1.2;
  flex: 1;
  min-width: 0;
}

.clickable-title {
  cursor: pointer;
  transition: color 0.2s ease;
}

.clickable-title:hover {
  color: #10b981;
}

.agent-name {
  color: #6b7280;
  font-size: 11px;
  font-weight: 500;
  font-family: 'SF Mono', 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  background: #f3f4f6;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  padding: 4px 10px;
  display: inline-block;
  white-space: nowrap;
}

.agent-description {
  color: #6b7280;
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 12px;
}

.agent-actions {
  padding: 0 20px 20px;
  display: flex;
  gap: 12px;
}

.agent-actions .n-button {
  flex: 1;
}

.loading, .empty {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 300px;
}

@media (max-width: 768px) {
  .agents-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}
</style>

