<template>
  <div class="space-y-4">
    <!-- 提供商表格 -->
    <Card variant="default" class="overflow-hidden">
      <!-- 标题和操作栏 -->
      <div class="px-6 py-3.5 border-b border-border/50">
        <div class="flex items-center justify-between gap-4">
          <!-- 左侧：标题 -->
          <h3 class="text-base font-semibold text-foreground">提供商管理</h3>

          <!-- 右侧：操作区 -->
          <div class="flex items-center gap-2">
            <!-- 搜索框 -->
            <div class="relative">
              <Search class="absolute left-2.5 top-1/2 -translate-y-1/2 h-3.5 w-3.5 text-muted-foreground/70 z-10 pointer-events-none" />
              <Input
                id="provider-search"
                v-model="searchQuery"
                type="text"
                placeholder="搜索提供商..."
                class="w-44 pl-8 pr-3 h-8 text-sm bg-muted/30 border-border/50 focus:border-primary/50 transition-colors"
              />
            </div>

            <div class="h-4 w-px bg-border" />

            <!-- 调度策略 -->
            <button
              class="group inline-flex items-center gap-1.5 px-2.5 h-8 rounded-md border border-border/50 bg-muted/20 hover:bg-muted/40 hover:border-primary/40 transition-all duration-200 text-xs"
              @click="openPriorityDialog"
              title="点击调整调度策略"
            >
              <span class="text-muted-foreground/80">调度:</span>
              <span class="font-medium text-foreground/90">{{ priorityModeConfig.label }}</span>
              <ChevronDown class="w-3 h-3 text-muted-foreground/70 group-hover:text-foreground transition-colors" />
            </button>

            <div class="h-4 w-px bg-border" />

            <!-- 操作按钮 -->
            <Button
              variant="ghost"
              size="icon"
              class="h-8 w-8"
              @click="openAddProviderDialog"
              title="新增提供商"
            >
              <Plus class="w-3.5 h-3.5" />
            </Button>
            <RefreshButton :loading="loading" @click="loadProviders" />
          </div>
        </div>
      </div>

      <!-- 加载状态 -->
      <div v-if="loading" class="flex items-center justify-center py-12">
        <div class="animate-spin rounded-full h-8 w-8 border-b-2 border-primary"></div>
      </div>

      <!-- 空状态 -->
      <div v-else-if="filteredProviders.length === 0" class="flex flex-col items-center justify-center py-16 text-center">
        <div class="text-muted-foreground mb-2">
          <template v-if="searchQuery">
            未找到匹配 "{{ searchQuery }}" 的提供商
          </template>
          <template v-else>
            暂无提供商，点击右上角添加
          </template>
        </div>
        <Button v-if="searchQuery" variant="outline" size="sm" @click="searchQuery = ''">
          清除搜索
        </Button>
      </div>

      <!-- 桌面端表格 -->
      <div v-else class="overflow-x-auto">
        <Table>
          <TableHeader>
            <TableRow class="border-b border-border/40 hover:bg-transparent">
              <TableHead class="w-[150px] h-11 font-medium text-foreground/80">提供商信息</TableHead>
              <TableHead class="w-[100px] h-11 font-medium text-foreground/80">计费类型</TableHead>
              <TableHead class="w-[120px] h-11 font-medium text-foreground/80">官网</TableHead>
              <TableHead class="w-[120px] h-11 font-medium text-foreground/80 text-center">资源统计</TableHead>
              <TableHead class="w-[240px] h-11 font-medium text-foreground/80">端点健康</TableHead>
              <TableHead class="w-[140px] h-11 font-medium text-foreground/80">配额/限流</TableHead>
              <TableHead class="w-[80px] h-11 font-medium text-foreground/80 text-center">状态</TableHead>
              <TableHead class="w-[120px] h-11 font-medium text-foreground/80 text-center">操作</TableHead>
            </TableRow>
          </TableHeader>
          <TableBody>
            <TableRow
              v-for="provider in paginatedProviders"
              :key="provider.id"
              class="border-b border-border/30 hover:bg-muted/20 transition-colors cursor-pointer"
              @mousedown="handleMouseDown"
              @click="handleRowClick($event, provider.id)"
            >
              <TableCell class="py-3.5">
                <div class="flex flex-col gap-0.5">
                  <span class="text-sm font-medium text-foreground">{{ provider.display_name }}</span>
                  <span class="text-xs text-muted-foreground/70 font-mono">{{ provider.name }}</span>
                </div>
              </TableCell>
              <TableCell class="py-3.5">
                <Badge variant="outline" class="text-xs font-normal border-border/50">
                  {{ formatBillingType(provider.billing_type || 'pay_as_you_go') }}
                </Badge>
              </TableCell>
              <TableCell class="py-3.5">
                <a
                  v-if="provider.website"
                  :href="provider.website"
                  target="_blank"
                  rel="noopener noreferrer"
                  class="text-xs text-primary/80 hover:text-primary hover:underline truncate block max-w-[100px]"
                  @click.stop
                  :title="provider.website"
                >
                  {{ formatWebsiteDisplay(provider.website) }}
                </a>
                <span v-else class="text-xs text-muted-foreground/50">-</span>
              </TableCell>
              <TableCell class="py-3.5 text-center">
                <div class="space-y-0.5 text-xs">
                  <div class="flex items-center justify-center gap-1.5">
                    <span class="text-muted-foreground/70">端点:</span>
                    <span class="font-medium text-foreground/90">{{ provider.active_endpoints }}</span>
                    <span class="text-muted-foreground/50">/{{ provider.total_endpoints }}</span>
                  </div>
                  <div class="flex items-center justify-center gap-1.5">
                    <span class="text-muted-foreground/70">密钥:</span>
                    <span class="font-medium text-foreground/90">{{ provider.active_keys }}</span>
                    <span class="text-muted-foreground/50">/{{ provider.total_keys }}</span>
                  </div>
                  <div class="flex items-center justify-center gap-1.5">
                    <span class="text-muted-foreground/70">模型:</span>
                    <span class="font-medium text-foreground/90">{{ provider.active_models }}</span>
                    <span class="text-muted-foreground/50">/{{ provider.total_models }}</span>
                  </div>
                </div>
              </TableCell>
              <TableCell class="py-3.5 align-middle">
                <div
                  v-if="provider.endpoint_health_details && provider.endpoint_health_details.length > 0"
                  class="flex flex-wrap gap-1.5 max-w-[280px]"
                >
                  <span
                    v-for="endpoint in sortEndpoints(provider.endpoint_health_details)"
                    :key="endpoint.api_format"
                    class="inline-flex items-center gap-1 px-2 py-0.5 rounded-md border text-[10px] font-medium tracking-wide uppercase leading-none"
                    :class="getEndpointTagClass(endpoint, provider)"
                    :title="getEndpointTooltip(endpoint, provider)"
                  >
                    <span
                      class="w-1.5 h-1.5 rounded-full"
                      :class="getEndpointDotColor(endpoint, provider)"
                    ></span>
                    {{ endpoint.api_format }}
                  </span>
                </div>
                <span v-else class="text-xs text-muted-foreground/50">暂无端点</span>
              </TableCell>
              <TableCell class="py-3.5">
                <div class="space-y-0.5 text-xs">
                  <div v-if="provider.billing_type === 'monthly_quota'" class="text-muted-foreground/70">
                    配额: <span class="font-semibold" :class="getQuotaUsedColorClass(provider)">${{ (provider.monthly_used_usd ?? 0).toFixed(2) }}</span> / <span class="font-medium">${{ (provider.monthly_quota_usd ?? 0).toFixed(2) }}</span>
                  </div>
                  <div v-if="rpmUsage(provider)" class="flex items-center gap-1">
                    <span class="text-muted-foreground/70">RPM:</span>
                    <span class="font-medium text-foreground/80">{{ rpmUsage(provider) }}</span>
                  </div>
                  <div v-if="provider.billing_type !== 'monthly_quota' && !rpmUsage(provider)" class="text-muted-foreground/50">
                    无限制
                  </div>
                </div>
              </TableCell>
              <TableCell class="py-3.5 text-center">
                <Badge :variant="provider.is_active ? 'success' : 'secondary'" class="text-xs">
                  {{ provider.is_active ? '活跃' : '已停用' }}
                </Badge>
              </TableCell>
              <TableCell class="py-3.5" @click.stop>
                <div class="flex items-center justify-center gap-0.5">
                  <Button
                    variant="ghost"
                    size="icon"
                    class="h-7 w-7 text-muted-foreground/70 hover:text-foreground"
                    @click="openProviderDrawer(provider.id)"
                    title="查看详情"
                  >
                    <Eye class="h-3.5 w-3.5" />
                  </Button>
                  <Button
                    variant="ghost"
                    size="icon"
                    class="h-7 w-7 text-muted-foreground/70 hover:text-foreground"
                    @click="openEditProviderDialog(provider)"
                    title="编辑提供商"
                  >
                    <Edit class="h-3.5 w-3.5" />
                  </Button>
                  <Button
                    variant="ghost"
                    size="icon"
                    class="h-7 w-7 text-muted-foreground/70 hover:text-foreground"
                    @click="toggleProviderStatus(provider)"
                    :title="provider.is_active ? '停用提供商' : '启用提供商'"
                  >
                    <Power class="h-3.5 w-3.5" />
                  </Button>
                  <Button
                    variant="ghost"
                    size="icon"
                    class="h-7 w-7 text-muted-foreground/70 hover:text-destructive"
                    @click="handleDeleteProvider(provider)"
                    title="删除提供商"
                  >
                    <Trash2 class="h-3.5 w-3.5" />
                  </Button>
                </div>
              </TableCell>
            </TableRow>
          </TableBody>
        </Table>
      </div>

      <!-- 分页 -->
      <Pagination
        v-if="!loading && filteredProviders.length > 0"
        :current="currentPage"
        :total="filteredProviders.length"
        :page-size="pageSize"
        @update:current="currentPage = $event"
        @update:page-size="pageSize = $event"
      />
    </Card>
  </div>

  <!-- 对话框 -->
  <ProviderFormDialog
    v-model="providerDialogOpen"
    :provider="providerToEdit"
    @provider-created="handleProviderAdded"
    @provider-updated="handleProviderUpdated"
  />

  <PriorityManagementDialog
    v-model="priorityDialogOpen"
    :providers="providers"
    @saved="handlePrioritySaved"
  />

  <ProviderDetailDrawer
    :open="providerDrawerOpen"
    :provider-id="selectedProviderId"
    @update:open="providerDrawerOpen = $event"
    @edit="openEditProviderDialog"
    @toggle-status="toggleProviderStatus"
    @refresh="loadProviders"
  />
</template>

<script setup lang="ts">
import { ref, computed, onMounted, watch } from 'vue'
import {
  Plus,
  Search,
  Edit,
  Eye,
  Trash2,
  ChevronDown,
  Power
} from 'lucide-vue-next'
import Button from '@/components/ui/button.vue'
import Badge from '@/components/ui/badge.vue'
import Card from '@/components/ui/card.vue'
import Input from '@/components/ui/input.vue'
import Table from '@/components/ui/table.vue'
import TableHeader from '@/components/ui/table-header.vue'
import TableBody from '@/components/ui/table-body.vue'
import TableRow from '@/components/ui/table-row.vue'
import TableHead from '@/components/ui/table-head.vue'
import TableCell from '@/components/ui/table-cell.vue'
import Pagination from '@/components/ui/pagination.vue'
import RefreshButton from '@/components/ui/refresh-button.vue'
import { ProviderFormDialog, PriorityManagementDialog } from '@/features/providers/components'
import ProviderDetailDrawer from '@/features/providers/components/ProviderDetailDrawer.vue'
import { useToast } from '@/composables/useToast'
import { useConfirm } from '@/composables/useConfirm'
import { useRowClick } from '@/composables/useRowClick'
import {
  getProvidersSummary,
  deleteProvider,
  updateProvider,
  type ProviderWithEndpointsSummary
} from '@/api/endpoints'
import { adminApi } from '@/api/admin'
import { formatBillingType } from '@/utils/format'

const { error: showError, success: showSuccess } = useToast()
const { confirmDanger } = useConfirm()

// 状态
const loading = ref(false)
const providers = ref<ProviderWithEndpointsSummary[]>([])
const providerDialogOpen = ref(false)
const providerToEdit = ref<ProviderWithEndpointsSummary | null>(null)
const priorityDialogOpen = ref(false)
const priorityMode = ref<'provider' | 'global_key'>('provider')
const providerDrawerOpen = ref(false)
const selectedProviderId = ref<string | null>(null)

// 搜索
const searchQuery = ref('')

// 分页
const currentPage = ref(1)
const pageSize = ref(20)

// 优先级模式配置
const priorityModeConfig = computed(() => {
  return {
    label: priorityMode.value === 'global_key' ? '全局 Key 优先' : '提供商优先'
  }
})

// 筛选后的提供商列表
const filteredProviders = computed(() => {
  let result = [...providers.value]

  // 搜索筛选
  if (searchQuery.value.trim()) {
    const query = searchQuery.value.toLowerCase()
    result = result.filter(p =>
      p.display_name.toLowerCase().includes(query) ||
      p.name.toLowerCase().includes(query)
    )
  }

  // 排序
  return result.sort((a, b) => {
    // 1. 优先显示活跃的提供商
    if (a.is_active !== b.is_active) {
      return a.is_active ? -1 : 1
    }
    // 2. 按优先级排序
    if (a.provider_priority !== b.provider_priority) {
      return a.provider_priority - b.provider_priority
    }
    // 3. 按名称排序
    return a.display_name.localeCompare(b.display_name)
  })
})

// 分页
const paginatedProviders = computed(() => {
  const start = (currentPage.value - 1) * pageSize.value
  const end = start + pageSize.value
  return filteredProviders.value.slice(start, end)
})

// 搜索时重置分页
watch(searchQuery, () => {
  currentPage.value = 1
})

// 加载优先级模式
async function loadPriorityMode() {
  try {
    const response = await adminApi.getSystemConfig('provider_priority_mode')
    if (response.value) {
      priorityMode.value = response.value as 'provider' | 'global_key'
    }
  } catch {
    priorityMode.value = 'provider'
  }
}

// 加载提供商列表
async function loadProviders() {
  loading.value = true
  try {
    providers.value = await getProvidersSummary()
  } catch (err: any) {
    showError(err.response?.data?.detail || '加载提供商列表失败', '错误')
  } finally {
    loading.value = false
  }
}


// 格式化官网显示
function formatWebsiteDisplay(url: string): string {
  try {
    const urlObj = new URL(url)
    return urlObj.hostname.replace(/^www\./, '')
  } catch {
    return url
  }
}

// 端点排序
function sortEndpoints(endpoints: any[]) {
  return [...endpoints].sort((a, b) => {
    const order = ['CLAUDE', 'OPENAI', 'CLAUDE_COMPATIBLE', 'OPENAI_COMPATIBLE', 'GEMINI', 'GEMINI_COMPATIBLE']
    return order.indexOf(a.api_format) - order.indexOf(b.api_format)
  })
}

// 判断端点是否可用（有 key）
function isEndpointAvailable(endpoint: any, _provider: ProviderWithEndpointsSummary): boolean {
  // 检查该端点是否有活跃的密钥
  return (endpoint.active_keys ?? 0) > 0
}

// 端点标签样式
function getEndpointTagClass(endpoint: any, provider: ProviderWithEndpointsSummary): string {
  if (!isEndpointAvailable(endpoint, provider)) {
    return 'border-red-300/50 bg-red-50/50 text-red-600/80 dark:border-red-500/30 dark:bg-red-500/10 dark:text-red-400/80'
  }
  return 'border-border/40 bg-muted/20 text-foreground/70'
}

// 端点圆点颜色
function getEndpointDotColor(endpoint: any, provider: ProviderWithEndpointsSummary): string {
  if (!isEndpointAvailable(endpoint, provider)) {
    return 'bg-red-400'
  }
  const score = endpoint.health_score
  if (score === undefined || score === null) {
    return 'bg-muted-foreground/40'
  }
  if (score >= 0.8) {
    return 'bg-green-500'
  }
  if (score >= 0.5) {
    return 'bg-amber-500'
  }
  return 'bg-red-500'
}

// 端点提示文本
function getEndpointTooltip(endpoint: any, provider: ProviderWithEndpointsSummary): string {
  if (provider.active_keys === 0) {
    return `${endpoint.api_format}: 无可用密钥`
  }
  const score = endpoint.health_score
  if (score === undefined || score === null) {
    return `${endpoint.api_format}: 暂无健康数据`
  }
  return `${endpoint.api_format}: 健康度 ${(score * 100).toFixed(0)}%`
}

// 配额已用颜色（根据使用比例）
function getQuotaUsedColorClass(provider: ProviderWithEndpointsSummary): string {
  const used = provider.monthly_used_usd ?? 0
  const quota = provider.monthly_quota_usd ?? 0
  if (quota <= 0) return 'text-foreground'
  const ratio = used / quota
  if (ratio >= 0.9) return 'text-red-600 dark:text-red-400'
  if (ratio >= 0.7) return 'text-amber-600 dark:text-amber-400'
  return 'text-foreground'
}

function rpmUsage(provider: ProviderWithEndpointsSummary): string | null {
  const rpmLimit = provider.rpm_limit
  const rpmUsed = provider.rpm_used ?? 0

  if (rpmLimit === null || rpmLimit === undefined) {
    return rpmUsed > 0 ? `${rpmUsed}` : null
  }

  if (rpmLimit === 0) {
    return '已完全禁止'
  }

  return `${rpmUsed} / ${rpmLimit}`
}

// 使用复用的行点击逻辑
const { handleMouseDown, shouldTriggerRowClick } = useRowClick()

// 处理行点击 - 只在非选中文本时打开抽屉
function handleRowClick(event: MouseEvent, providerId: string) {
  if (!shouldTriggerRowClick(event)) return
  openProviderDrawer(providerId)
}

// 打开添加提供商对话框
function openAddProviderDialog() {
  providerToEdit.value = null
  providerDialogOpen.value = true
}

// 打开优先级管理对话框
function openPriorityDialog() {
  priorityDialogOpen.value = true
}

// 打开提供商详情抽屉
function openProviderDrawer(providerId: string) {
  selectedProviderId.value = providerId
  providerDrawerOpen.value = true
}

// 打开编辑提供商对话框
function openEditProviderDialog(provider: ProviderWithEndpointsSummary) {
  providerToEdit.value = provider
  providerDialogOpen.value = true
}

// 处理提供商编辑完成
function handleProviderUpdated() {
  loadProviders()
}

// 优先级保存成功回调
async function handlePrioritySaved() {
  await loadProviders()
  await loadPriorityMode()
}

// 处理提供商添加
function handleProviderAdded() {
  loadProviders()
}

// 删除提供商
async function handleDeleteProvider(provider: ProviderWithEndpointsSummary) {
  const confirmed = await confirmDanger(
    '删除提供商',
    `确定要删除提供商 "${provider.display_name}" 吗？\n\n这将同时删除其所有端点、密钥和配置。此操作不可恢复！`
  )

  if (!confirmed) return

  try {
    await deleteProvider(provider.id)
    showSuccess('提供商已删除')
    loadProviders()
  } catch (err: any) {
    showError(err.response?.data?.detail || '删除提供商失败', '错误')
  }
}

// 切换提供商状态
async function toggleProviderStatus(provider: ProviderWithEndpointsSummary) {
  try {
    await updateProvider(provider.id, { is_active: !provider.is_active })
    provider.is_active = !provider.is_active
    showSuccess(provider.is_active ? '提供商已启用' : '提供商已停用')
  } catch (err: any) {
    showError(err.response?.data?.detail || '操作失败', '错误')
  }
}

onMounted(() => {
  loadProviders()
  loadPriorityMode()
})
</script>
