'use client'

import { useState, useEffect, useCallback } from 'react'
import Link from 'next/link'
import { useToast } from '@/components/ui/Toast'
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/Card'
import { Button } from '@/components/ui/Button'
import { SuccessTag, PendingTag, WarningTag, ErrorTag } from '@/components/ui/Tag'
import {
  FileText,
  Video,
  Search,
  Clock,
  Eye,
  File,
  Download,
  MessageSquareWarning,
  Loader2
} from 'lucide-react'
import { Modal } from '@/components/ui/Modal'
import { getPlatformInfo } from '@/lib/platforms'
import { api } from '@/lib/api'
import { USE_MOCK } from '@/contexts/AuthContext'
import { useSSE } from '@/contexts/SSEContext'
import type { TaskResponse } from '@/types/task'

function platformLabel(id?: string | null): string {
  if (!id) return ''
  return getPlatformInfo(id)?.name || id
}

// ==================== Mock 数据 ====================
const mockScriptTasks: TaskResponse[] = [
  {
    id: 'script-001', name: '夏日护肤推广脚本', sequence: 1,
    stage: 'script_agency_review',
    project: { id: 'proj-001', name: 'XX品牌618推广', brand_name: 'XX品牌' },
    agency: { id: 'ag-001', name: '优创代理' },
    creator: { id: 'cr-001', name: '小美护肤' },
    script_file_name: '夏日护肤推广_脚本v2.docx',
    script_ai_score: 88,
    script_ai_result: { score: 88, violations: [], soft_warnings: [] },
    appeal_count: 0, is_appeal: false,
    created_at: '2026-02-06T14:30:00Z', updated_at: '2026-02-06T14:30:00Z',
  },
  {
    id: 'script-002', name: '新品口红试色脚本', sequence: 2,
    stage: 'script_agency_review',
    project: { id: 'proj-001', name: 'XX品牌618推广', brand_name: 'XX品牌' },
    agency: { id: 'ag-001', name: '优创代理' },
    creator: { id: 'cr-002', name: '美妆Lisa' },
    script_file_name: '口红试色_脚本v1.docx',
    script_ai_score: 72,
    script_ai_result: { score: 72, violations: [{ type: '违禁词', content: '最好', severity: 'medium', suggestion: '替换' }], soft_warnings: [] },
    appeal_count: 1, is_appeal: true, appeal_reason: '已修改违规用词，请求重新审核',
    created_at: '2026-02-06T12:15:00Z', updated_at: '2026-02-06T12:15:00Z',
  },
  {
    id: 'script-003', name: '健身器材推荐脚本', sequence: 3,
    stage: 'script_agency_review',
    project: { id: 'proj-002', name: 'XX运动品牌', brand_name: 'XX运动' },
    agency: { id: 'ag-001', name: '优创代理' },
    creator: { id: 'cr-003', name: '健身教练王' },
    script_file_name: '健身器材_推荐脚本.pdf',
    script_ai_score: 95,
    script_ai_result: { score: 95, violations: [], soft_warnings: [] },
    appeal_count: 0, is_appeal: false,
    created_at: '2026-02-06T10:00:00Z', updated_at: '2026-02-06T10:00:00Z',
  },
]

const mockVideoTasks: TaskResponse[] = [
  {
    id: 'video-001', name: '夏日护肤推广', sequence: 1,
    stage: 'video_agency_review',
    project: { id: 'proj-001', name: 'XX品牌618推广', brand_name: 'XX品牌' },
    agency: { id: 'ag-001', name: '优创代理' },
    creator: { id: 'cr-001', name: '小美护肤' },
    video_file_name: '夏日护肤_成片v2.mp4',
    video_duration: 135, video_ai_score: 85,
    video_ai_result: { score: 85, violations: [], soft_warnings: [] },
    appeal_count: 0, is_appeal: false,
    created_at: '2026-02-06T15:00:00Z', updated_at: '2026-02-06T15:00:00Z',
  },
  {
    id: 'video-002', name: '新品口红试色', sequence: 2,
    stage: 'video_agency_review',
    project: { id: 'proj-001', name: 'XX品牌618推广', brand_name: 'XX品牌' },
    agency: { id: 'ag-001', name: '优创代理' },
    creator: { id: 'cr-002', name: '美妆Lisa' },
    video_file_name: '口红试色_终版.mp4',
    video_duration: 222, video_ai_score: 68,
    video_ai_result: { score: 68, violations: [{ type: '竞品', content: '疑似竞品', severity: 'high', suggestion: '确认' }], soft_warnings: [] },
    appeal_count: 1, is_appeal: true, appeal_reason: '已按要求重新剪辑，删除了争议片段',
    created_at: '2026-02-06T13:45:00Z', updated_at: '2026-02-06T13:45:00Z',
  },
  {
    id: 'video-003', name: '美妆新品体验', sequence: 3,
    stage: 'video_agency_review',
    project: { id: 'proj-001', name: 'XX品牌618推广', brand_name: 'XX品牌' },
    agency: { id: 'ag-001', name: '优创代理' },
    creator: { id: 'cr-003', name: '达人C' },
    video_file_name: '美妆体验_v3.mp4',
    video_duration: 260, video_ai_score: 58,
    video_ai_result: { score: 58, violations: [{ type: '违禁词', content: '最好', severity: 'high', suggestion: '替换' }], soft_warnings: [] },
    appeal_count: 0, is_appeal: false,
    created_at: '2026-02-06T11:30:00Z', updated_at: '2026-02-06T11:30:00Z',
  },
]

// ==================== 工具函数 ====================

function getRiskLevel(task: TaskResponse, type: 'script' | 'video'): 'low' | 'medium' | 'high' {
  const score = type === 'script' ? task.script_ai_score : task.video_ai_score
  if (score == null) return 'low'
  if (score >= 85) return 'low'
  if (score >= 70) return 'medium'
  return 'high'
}

const riskLevelConfig = {
  low: { label: 'AI通过', color: 'bg-accent-green', textColor: 'text-accent-green' },
  medium: { label: '风险:中', color: 'bg-accent-amber', textColor: 'text-accent-amber' },
  high: { label: '风险:高', color: 'bg-accent-coral', textColor: 'text-accent-coral' },
}

function formatDuration(seconds: number): string {
  const mins = Math.floor(seconds / 60)
  const secs = Math.floor(seconds % 60)
  return `${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`
}

function ScoreTag({ score }: { score: number }) {
  if (score >= 85) return <SuccessTag>{score}分</SuccessTag>
  if (score >= 70) return <WarningTag>{score}分</WarningTag>
  return <ErrorTag>{score}分</ErrorTag>
}

// ==================== 卡片组件 ====================

function ScriptTaskCard({ task, onPreview, toast }: { task: TaskResponse; onPreview: (task: TaskResponse) => void; toast: ReturnType<typeof useToast> }) {
  const riskLevel = getRiskLevel(task, 'script')
  const riskConfig = riskLevelConfig[riskLevel]

  const handleDownload = (e: React.MouseEvent) => {
    e.stopPropagation()
    toast.info(`下载文件: ${task.script_file_name || '脚本文件'}`)
  }

  const handlePreview = (e: React.MouseEvent) => {
    e.stopPropagation()
    onPreview(task)
  }

  return (
    <div className="rounded-xl bg-bg-elevated overflow-hidden">
      {/* 顶部条 */}
      <div className="px-4 py-1.5 bg-accent-indigo/10 border-b border-accent-indigo/20 flex items-center gap-1.5">
        <span className="text-xs font-medium text-accent-indigo">{task.project.brand_name || ''}</span>
        {task.project.platform && (
          <span className="text-xs text-text-tertiary">· {platformLabel(task.project.platform)}</span>
        )}
        {task.is_appeal && (
          <span className="ml-auto flex items-center gap-1 px-2 py-0.5 text-xs bg-accent-amber/30 text-accent-amber rounded-full font-medium">
            <MessageSquareWarning size={12} />
            申诉
          </span>
        )}
      </div>
      <div className="p-4">
        <div className="flex items-center justify-between mb-3">
          <div className="flex items-center gap-2 min-w-0">
            <div className={`w-2 h-2 rounded-full flex-shrink-0 ${riskConfig.color}`} />
            <span className="font-medium text-text-primary truncate">{task.project.name} · {task.name}</span>
          </div>
          <span className={`text-xs flex-shrink-0 ${riskConfig.textColor}`}>{riskConfig.label}</span>
        </div>
        <p className="text-xs text-text-secondary mb-3">达人：{task.creator.name}</p>

        {task.is_appeal && task.appeal_reason && (
          <div className="mb-3 p-2.5 rounded-lg bg-accent-amber/10 border border-accent-amber/30">
            <p className="text-xs text-accent-amber font-medium mb-1">申诉理由</p>
            <p className="text-sm text-text-secondary">{task.appeal_reason}</p>
          </div>
        )}

        <div className="flex items-center gap-3 p-3 rounded-lg bg-bg-page mb-3">
          <div className="w-10 h-10 rounded-lg bg-accent-indigo/15 flex items-center justify-center">
            <File size={20} className="text-accent-indigo" />
          </div>
          <div className="flex-1 min-w-0">
            <p className="text-sm font-medium text-text-primary truncate">{task.script_file_name || '脚本文件'}</p>
          </div>
          <button type="button" onClick={handlePreview} className="p-2 rounded-lg hover:bg-bg-elevated transition-colors" title="预览文件">
            <Eye size={18} className="text-text-secondary" />
          </button>
          <button type="button" onClick={handleDownload} className="p-2 rounded-lg hover:bg-bg-elevated transition-colors" title="下载文件">
            <Download size={18} className="text-text-secondary" />
          </button>
        </div>

        <div className="flex items-center justify-between">
          <span className="text-xs text-text-tertiary flex items-center gap-1">
            <Clock size={12} />
            {new Date(task.created_at).toLocaleString('zh-CN', { month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' })}
          </span>
          <Link href={`/agency/review/script/${task.id}`}>
            <Button size="sm" className={`${
              riskLevel === 'high' ? 'bg-accent-coral hover:bg-accent-coral/80' :
              riskLevel === 'medium' ? 'bg-accent-amber hover:bg-accent-amber/80' :
              'bg-accent-green hover:bg-accent-green/80'
            } text-white`}>
              {task.is_appeal ? '审核申诉' : '审核'}
            </Button>
          </Link>
        </div>
      </div>
    </div>
  )
}

function VideoTaskCard({ task, onPreview, toast }: { task: TaskResponse; onPreview: (task: TaskResponse) => void; toast: ReturnType<typeof useToast> }) {
  const riskLevel = getRiskLevel(task, 'video')
  const riskConfig = riskLevelConfig[riskLevel]

  const handleDownload = (e: React.MouseEvent) => {
    e.stopPropagation()
    toast.info(`下载文件: ${task.video_file_name || '视频文件'}`)
  }

  const handlePreview = (e: React.MouseEvent) => {
    e.stopPropagation()
    onPreview(task)
  }

  return (
    <div className="rounded-xl bg-bg-elevated overflow-hidden">
      <div className="px-4 py-1.5 bg-purple-500/10 border-b border-purple-500/20 flex items-center gap-1.5">
        <span className="text-xs font-medium text-purple-400">{task.project.brand_name || ''}</span>
        {task.project.platform && (
          <span className="text-xs text-text-tertiary">· {platformLabel(task.project.platform)}</span>
        )}
        {task.is_appeal && (
          <span className="ml-auto flex items-center gap-1 px-2 py-0.5 text-xs bg-accent-amber/30 text-accent-amber rounded-full font-medium">
            <MessageSquareWarning size={12} />
            申诉
          </span>
        )}
      </div>
      <div className="p-4">
        <div className="flex items-center justify-between mb-3">
          <div className="flex items-center gap-2 min-w-0">
            <div className={`w-2 h-2 rounded-full flex-shrink-0 ${riskConfig.color}`} />
            <span className="font-medium text-text-primary truncate">{task.project.name} · {task.name}</span>
          </div>
          <span className={`text-xs flex-shrink-0 ${riskConfig.textColor}`}>{riskConfig.label}</span>
        </div>
        <p className="text-xs text-text-secondary mb-3">达人：{task.creator.name}</p>

        {task.is_appeal && task.appeal_reason && (
          <div className="mb-3 p-2.5 rounded-lg bg-accent-amber/10 border border-accent-amber/30">
            <p className="text-xs text-accent-amber font-medium mb-1">申诉理由</p>
            <p className="text-sm text-text-secondary">{task.appeal_reason}</p>
          </div>
        )}

        <div className="flex items-center gap-3 p-3 rounded-lg bg-bg-page mb-3">
          <div className="w-10 h-10 rounded-lg bg-purple-500/15 flex items-center justify-center">
            <Video size={20} className="text-purple-400" />
          </div>
          <div className="flex-1 min-w-0">
            <p className="text-sm font-medium text-text-primary truncate">{task.video_file_name || '视频文件'}</p>
            {task.video_duration && (
              <p className="text-xs text-text-tertiary">{formatDuration(task.video_duration)}</p>
            )}
          </div>
          <button type="button" onClick={handlePreview} className="p-2 rounded-lg hover:bg-bg-elevated transition-colors" title="预览视频">
            <Eye size={18} className="text-text-secondary" />
          </button>
          <button type="button" onClick={handleDownload} className="p-2 rounded-lg hover:bg-bg-elevated transition-colors" title="下载文件">
            <Download size={18} className="text-text-secondary" />
          </button>
        </div>

        <div className="flex items-center justify-between">
          <span className="text-xs text-text-tertiary flex items-center gap-1">
            <Clock size={12} />
            {new Date(task.created_at).toLocaleString('zh-CN', { month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' })}
          </span>
          <Link href={`/agency/review/video/${task.id}`}>
            <Button size="sm" className={`${
              riskLevel === 'high' ? 'bg-accent-coral hover:bg-accent-coral/80' :
              riskLevel === 'medium' ? 'bg-accent-amber hover:bg-accent-amber/80' :
              'bg-accent-green hover:bg-accent-green/80'
            } text-white`}>
              {task.is_appeal ? '审核申诉' : '审核'}
            </Button>
          </Link>
        </div>
      </div>
    </div>
  )
}

// ==================== 骨架屏 ====================

function ReviewListSkeleton() {
  return (
    <div className="space-y-6 animate-pulse">
      <div className="flex items-center justify-between">
        <div className="h-8 w-24 bg-bg-elevated rounded" />
        <div className="flex gap-2">
          <div className="h-8 w-20 bg-bg-elevated rounded" />
          <div className="h-8 w-20 bg-bg-elevated rounded" />
        </div>
      </div>
      <div className="h-10 w-full max-w-md bg-bg-elevated rounded-lg" />
      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
        {[1, 2].map(i => (
          <div key={i} className="space-y-3">
            <div className="h-8 w-32 bg-bg-elevated rounded" />
            {[1, 2, 3].map(j => (
              <div key={j} className="h-40 bg-bg-elevated rounded-xl" />
            ))}
          </div>
        ))}
      </div>
    </div>
  )
}

// ==================== 主页面 ====================

export default function AgencyReviewListPage() {
  const [searchQuery, setSearchQuery] = useState('')
  const [activeTab, setActiveTab] = useState<'all' | 'script' | 'video'>('all')
  const [previewTask, setPreviewTask] = useState<TaskResponse | null>(null)
  const [previewType, setPreviewType] = useState<'script' | 'video'>('script')
  const [scriptTasks, setScriptTasks] = useState<TaskResponse[]>([])
  const [videoTasks, setVideoTasks] = useState<TaskResponse[]>([])
  const [loading, setLoading] = useState(true)
  const toast = useToast()
  const { subscribe } = useSSE()

  const loadData = useCallback(async () => {
    if (USE_MOCK) {
      setScriptTasks(mockScriptTasks)
      setVideoTasks(mockVideoTasks)
      setLoading(false)
      return
    }

    try {
      const [scriptData, videoData] = await Promise.all([
        api.listTasks(1, 50, 'script_agency_review'),
        api.listTasks(1, 50, 'video_agency_review'),
      ])
      setScriptTasks(scriptData.items)
      setVideoTasks(videoData.items)
    } catch (err) {
      console.error('Failed to load review tasks:', err)
      toast.error('加载审核任务失败')
    } finally {
      setLoading(false)
    }
  }, [toast])

  useEffect(() => {
    loadData()
  }, [loadData])

  useEffect(() => {
    const unsub1 = subscribe('task_updated', () => loadData())
    const unsub2 = subscribe('new_task', () => loadData())
    return () => { unsub1(); unsub2() }
  }, [subscribe, loadData])

  if (loading) return <ReviewListSkeleton />

  const filteredScripts = scriptTasks.filter(task =>
    task.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
    task.creator.name.toLowerCase().includes(searchQuery.toLowerCase())
  )

  const filteredVideos = videoTasks.filter(task =>
    task.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
    task.creator.name.toLowerCase().includes(searchQuery.toLowerCase())
  )

  const appealScriptCount = scriptTasks.filter(t => t.is_appeal).length
  const appealVideoCount = videoTasks.filter(t => t.is_appeal).length

  const handleScriptPreview = (task: TaskResponse) => {
    setPreviewTask(task)
    setPreviewType('script')
  }

  const handleVideoPreview = (task: TaskResponse) => {
    setPreviewTask(task)
    setPreviewType('video')
  }

  return (
    <div className="space-y-6 min-h-0">
      {/* 页面标题 */}
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-bold text-text-primary">审核台</h1>
          <p className="text-sm text-text-secondary mt-1">审核达人提交的脚本和视频</p>
        </div>
        <div className="flex items-center gap-2 text-sm">
          <span className="text-text-secondary">待审核：</span>
          <span className="px-2 py-1 bg-accent-indigo/20 text-accent-indigo rounded font-medium">
            {scriptTasks.length} 脚本
          </span>
          <span className="px-2 py-1 bg-purple-500/20 text-purple-400 rounded font-medium">
            {videoTasks.length} 视频
          </span>
          {(appealScriptCount + appealVideoCount) > 0 && (
            <span className="px-2 py-1 bg-accent-amber/20 text-accent-amber rounded font-medium flex items-center gap-1">
              <MessageSquareWarning size={14} />
              {appealScriptCount + appealVideoCount} 申诉
            </span>
          )}
        </div>
      </div>

      {/* 搜索和筛选 */}
      <div className="flex items-center gap-4">
        <div className="relative flex-1 max-w-md">
          <Search size={18} className="absolute left-3 top-1/2 -translate-y-1/2 text-text-tertiary" />
          <input
            type="text"
            placeholder="搜索任务名称或达人..."
            value={searchQuery}
            onChange={(e) => setSearchQuery(e.target.value)}
            className="w-full pl-10 pr-4 py-2 border border-border-subtle rounded-lg bg-bg-elevated text-text-primary focus:outline-none focus:ring-2 focus:ring-accent-indigo"
          />
        </div>
        <div className="flex items-center gap-1 p-1 bg-bg-elevated rounded-lg">
          <button
            type="button"
            onClick={() => setActiveTab('all')}
            className={`px-4 py-2 rounded-md text-sm font-medium transition-colors ${
              activeTab === 'all' ? 'bg-bg-card text-text-primary shadow-sm' : 'text-text-secondary hover:text-text-primary'
            }`}
          >
            全部
          </button>
          <button
            type="button"
            onClick={() => setActiveTab('script')}
            className={`px-4 py-2 rounded-md text-sm font-medium transition-colors ${
              activeTab === 'script' ? 'bg-bg-card text-text-primary shadow-sm' : 'text-text-secondary hover:text-text-primary'
            }`}
          >
            脚本
          </button>
          <button
            type="button"
            onClick={() => setActiveTab('video')}
            className={`px-4 py-2 rounded-md text-sm font-medium transition-colors ${
              activeTab === 'video' ? 'bg-bg-card text-text-primary shadow-sm' : 'text-text-secondary hover:text-text-primary'
            }`}
          >
            视频
          </button>
        </div>
      </div>

      {/* 任务列表 */}
      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
        {(activeTab === 'all' || activeTab === 'script') && (
          <Card>
            <CardHeader>
              <CardTitle className="flex items-center gap-2">
                <FileText size={18} className="text-accent-indigo" />
                脚本审核
                <span className="ml-auto text-sm font-normal text-accent-indigo">
                  {filteredScripts.length} 条待审核
                </span>
              </CardTitle>
            </CardHeader>
            <CardContent className="space-y-3">
              {filteredScripts.length > 0 ? (
                filteredScripts.map((task) => (
                  <ScriptTaskCard key={task.id} task={task} onPreview={handleScriptPreview} toast={toast} />
                ))
              ) : (
                <div className="text-center py-8 text-text-tertiary">
                  <FileText size={32} className="mx-auto mb-2 opacity-50" />
                  <p>暂无待审脚本</p>
                </div>
              )}
            </CardContent>
          </Card>
        )}

        {(activeTab === 'all' || activeTab === 'video') && (
          <Card>
            <CardHeader>
              <CardTitle className="flex items-center gap-2">
                <Video size={18} className="text-purple-400" />
                视频审核
                <span className="ml-auto text-sm font-normal text-accent-indigo">
                  {filteredVideos.length} 条待审核
                </span>
              </CardTitle>
            </CardHeader>
            <CardContent className="space-y-3">
              {filteredVideos.length > 0 ? (
                filteredVideos.map((task) => (
                  <VideoTaskCard key={task.id} task={task} onPreview={handleVideoPreview} toast={toast} />
                ))
              ) : (
                <div className="text-center py-8 text-text-tertiary">
                  <Video size={32} className="mx-auto mb-2 opacity-50" />
                  <p>暂无待审视频</p>
                </div>
              )}
            </CardContent>
          </Card>
        )}
      </div>

      {/* 预览弹窗 */}
      <Modal
        isOpen={!!previewTask}
        onClose={() => setPreviewTask(null)}
        title={previewType === 'script' ? (previewTask?.script_file_name || '脚本预览') : (previewTask?.video_file_name || '视频预览')}
        size="lg"
      >
        <div className="space-y-4">
          {previewTask?.is_appeal && previewTask?.appeal_reason && (
            <div className="p-3 rounded-lg bg-accent-amber/10 border border-accent-amber/30">
              <p className="text-xs text-accent-amber font-medium mb-1 flex items-center gap-1">
                <MessageSquareWarning size={12} />
                申诉理由
              </p>
              <p className="text-sm text-text-secondary">{previewTask.appeal_reason}</p>
            </div>
          )}

          {previewType === 'script' ? (
            <div className="aspect-[4/3] bg-bg-elevated rounded-lg flex items-center justify-center">
              <div className="text-center">
                <FileText className="w-12 h-12 mx-auto text-accent-indigo mb-4" />
                <p className="text-text-secondary">脚本预览区域</p>
                <p className="text-xs text-text-tertiary mt-1">实际开发中将嵌入文档预览组件</p>
              </div>
            </div>
          ) : (
            <div className="aspect-video bg-bg-elevated rounded-lg flex items-center justify-center">
              <div className="text-center">
                <Video className="w-12 h-12 mx-auto text-purple-400 mb-4" />
                <p className="text-text-secondary">视频播放区域</p>
                <p className="text-xs text-text-tertiary mt-1">实际开发中将嵌入视频播放器</p>
              </div>
            </div>
          )}

          <div className="flex justify-between items-center">
            <div className="text-sm text-text-secondary">
              <span>{previewType === 'script' ? previewTask?.script_file_name : previewTask?.video_file_name}</span>
              {previewType === 'video' && previewTask?.video_duration && (
                <>
                  <span className="mx-2">·</span>
                  <span>{formatDuration(previewTask.video_duration)}</span>
                </>
              )}
            </div>
            <div className="flex gap-2">
              <Button variant="secondary" onClick={() => setPreviewTask(null)}>
                关闭
              </Button>
              <Button onClick={() => toast.info(`下载文件: ${previewType === 'script' ? previewTask?.script_file_name : previewTask?.video_file_name}`)}>
                <Download size={16} />
                下载
              </Button>
            </div>
          </div>
        </div>
      </Modal>
    </div>
  )
}