'use client'

import { useState, useEffect } from 'react'
import { useRouter, useParams, useSearchParams } from 'next/navigation'
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/Card'
import { Button } from '@/components/ui/Button'
import { SuccessTag, WarningTag, ErrorTag, PendingTag } from '@/components/ui/Tag'
import { ReviewSteps, getReviewSteps } from '@/components/ui/ReviewSteps'
import {
  ArrowLeft,
  Upload,
  FileText,
  CheckCircle,
  XCircle,
  AlertTriangle,
  Clock,
  Loader2,
  RefreshCw,
  Eye,
  MessageSquare
} from 'lucide-react'

// 模拟任务数据
const mockTask = {
  id: 'task-001',
  projectName: 'XX品牌618推广',
  brandName: 'XX护肤品牌',
  deadline: '2026-06-18',
  scriptStatus: 'pending_upload', // pending_upload | ai_reviewing | ai_result | agent_reviewing | agent_rejected | brand_reviewing | brand_passed | brand_rejected
  scriptFile: null as string | null,
  aiResult: null as null | {
    score: number
    violations: Array<{ type: string; content: string; suggestion: string }>
    complianceChecks: Array<{ item: string; passed: boolean; note?: string }>
  },
  agencyReview: null as null | {
    result: 'approved' | 'rejected'
    comment: string
    reviewer: string
    time: string
  },
  brandReview: null as null | {
    result: 'approved' | 'rejected'
    comment: string
    reviewer: string
    time: string
  },
}

// 根据状态获取模拟数据
function getTaskByStatus(status: string) {
  const task = { ...mockTask, scriptStatus: status }

  if (status === 'ai_result' || status === 'agent_reviewing' || status === 'agent_rejected' || status === 'brand_reviewing' || status === 'brand_passed' || status === 'brand_rejected') {
    task.scriptFile = '夏日护肤推广脚本.docx'
    task.aiResult = {
      score: 85,
      violations: [
        { type: '违禁词', content: '神器', suggestion: '建议替换为"好物"或"必备品"' },
      ],
      complianceChecks: [
        { item: '品牌名称正确', passed: true },
        { item: 'SPF标注准确', passed: true },
        { item: '无绝对化用语', passed: false, note: '"超级好用"建议修改' },
      ],
    }
  }

  if (status === 'agent_rejected') {
    task.agencyReview = {
      result: 'rejected',
      comment: '违禁词未修改，请修改后重新提交。',
      reviewer: '张经理',
      time: '2026-02-06 15:30',
    }
  }

  if (status === 'brand_reviewing' || status === 'brand_passed' || status === 'brand_rejected') {
    task.agencyReview = {
      result: 'approved',
      comment: '脚本符合要求，建议通过。',
      reviewer: '张经理',
      time: '2026-02-06 15:30',
    }
  }

  if (status === 'brand_passed') {
    task.brandReview = {
      result: 'approved',
      comment: '脚本通过终审，可以开始拍摄视频。',
      reviewer: '品牌方审核员',
      time: '2026-02-06 18:00',
    }
  }

  if (status === 'brand_rejected') {
    task.brandReview = {
      result: 'rejected',
      comment: '产品卖点覆盖不完整，请补充后重新提交。',
      reviewer: '品牌方审核员',
      time: '2026-02-06 18:00',
    }
  }

  return task
}

function UploadSection({ onUpload }: { onUpload: () => void }) {
  const [file, setFile] = useState<File | null>(null)

  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
    const selectedFile = e.target.files?.[0]
    if (selectedFile) {
      setFile(selectedFile)
    }
  }

  return (
    <Card>
      <CardHeader>
        <CardTitle className="flex items-center gap-2">
          <Upload size={18} className="text-accent-indigo" />
          上传脚本
        </CardTitle>
      </CardHeader>
      <CardContent className="space-y-4">
        <div className="border-2 border-dashed border-border-subtle rounded-lg p-8 text-center hover:border-accent-indigo/50 transition-colors">
          {file ? (
            <div className="flex items-center justify-center gap-3">
              <FileText size={24} className="text-accent-indigo" />
              <span className="text-text-primary">{file.name}</span>
              <button
                type="button"
                onClick={() => setFile(null)}
                className="p-1 hover:bg-bg-elevated rounded-full"
              >
                <XCircle size={16} className="text-text-tertiary" />
              </button>
            </div>
          ) : (
            <label className="cursor-pointer">
              <Upload size={32} className="mx-auto text-text-tertiary mb-3" />
              <p className="text-text-secondary mb-1">点击或拖拽上传脚本文件</p>
              <p className="text-xs text-text-tertiary">支持 Word、PDF、TXT 格式</p>
              <input
                type="file"
                accept=".doc,.docx,.pdf,.txt"
                onChange={handleFileChange}
                className="hidden"
              />
            </label>
          )}
        </div>
        <Button onClick={onUpload} disabled={!file} fullWidth>
          提交脚本
        </Button>
      </CardContent>
    </Card>
  )
}

function AIReviewingSection() {
  const [progress, setProgress] = useState(0)
  const [logs, setLogs] = useState<string[]>(['开始解析脚本文件...'])

  useEffect(() => {
    const timer = setInterval(() => {
      setProgress(prev => {
        if (prev >= 100) {
          clearInterval(timer)
          return 100
        }
        return prev + 10
      })
    }, 500)

    const logTimer = setTimeout(() => {
      setLogs(prev => [...prev, '正在提取文本内容...'])
    }, 1000)

    const logTimer2 = setTimeout(() => {
      setLogs(prev => [...prev, '正在进行违禁词检测...'])
    }, 2000)

    const logTimer3 = setTimeout(() => {
      setLogs(prev => [...prev, '正在分析卖点覆盖...'])
    }, 3000)

    return () => {
      clearInterval(timer)
      clearTimeout(logTimer)
      clearTimeout(logTimer2)
      clearTimeout(logTimer3)
    }
  }, [])

  return (
    <Card>
      <CardContent className="py-8 text-center">
        <Loader2 size={48} className="mx-auto text-accent-indigo mb-4 animate-spin" />
        <h3 className="text-lg font-medium text-text-primary mb-2">AI 正在审核您的脚本</h3>
        <p className="text-text-secondary mb-4">请稍候，预计需要 1-2 分钟</p>
        <div className="w-full max-w-md mx-auto">
          <div className="h-2 bg-bg-elevated rounded-full overflow-hidden mb-2">
            <div className="h-full bg-accent-indigo transition-all" style={{ width: `${progress}%` }} />
          </div>
          <p className="text-sm text-text-tertiary">{progress}%</p>
        </div>
        <div className="mt-6 p-4 bg-bg-elevated rounded-lg text-left max-w-md mx-auto">
          <p className="text-xs text-text-tertiary mb-2">处理日志</p>
          {logs.map((log, idx) => (
            <p key={idx} className="text-sm text-text-secondary">{log}</p>
          ))}
        </div>
      </CardContent>
    </Card>
  )
}

function AIResultSection({ task }: { task: ReturnType<typeof getTaskByStatus> }) {
  if (!task.aiResult) return null

  return (
    <Card>
      <CardHeader>
        <CardTitle className="flex items-center justify-between">
          <span className="flex items-center gap-2">
            <CheckCircle size={18} className="text-accent-green" />
            AI 审核结果
          </span>
          <span className={`text-xl font-bold ${task.aiResult.score >= 85 ? 'text-accent-green' : task.aiResult.score >= 70 ? 'text-yellow-400' : 'text-accent-coral'}`}>
            {task.aiResult.score}分
          </span>
        </CardTitle>
      </CardHeader>
      <CardContent className="space-y-4">
        {/* 违规检测 */}
        {task.aiResult.violations.length > 0 && (
          <div>
            <h4 className="text-sm font-medium text-text-primary mb-2 flex items-center gap-2">
              <AlertTriangle size={14} className="text-orange-500" />
              违规检测 ({task.aiResult.violations.length})
            </h4>
            {task.aiResult.violations.map((v, idx) => (
              <div key={idx} className="p-3 bg-orange-500/10 rounded-lg border border-orange-500/30 mb-2">
                <div className="flex items-center gap-2 mb-1">
                  <WarningTag>{v.type}</WarningTag>
                </div>
                <p className="text-sm text-text-primary">「{v.content}」</p>
                <p className="text-xs text-accent-indigo mt-1">{v.suggestion}</p>
              </div>
            ))}
          </div>
        )}

        {/* 合规检查 */}
        <div>
          <h4 className="text-sm font-medium text-text-primary mb-2">合规检查</h4>
          <div className="space-y-2">
            {task.aiResult.complianceChecks.map((check, idx) => (
              <div key={idx} className="flex items-start gap-2 p-2 rounded-lg bg-bg-elevated">
                {check.passed ? (
                  <CheckCircle size={16} className="text-accent-green flex-shrink-0 mt-0.5" />
                ) : (
                  <XCircle size={16} className="text-accent-coral flex-shrink-0 mt-0.5" />
                )}
                <div className="flex-1">
                  <span className="text-sm text-text-primary">{check.item}</span>
                  {check.note && <p className="text-xs text-text-tertiary mt-0.5">{check.note}</p>}
                </div>
              </div>
            ))}
          </div>
        </div>
      </CardContent>
    </Card>
  )
}

function ReviewFeedbackSection({ review, type }: { review: NonNullable<typeof mockTask.agencyReview>; type: 'agency' | 'brand' }) {
  const isApproved = review.result === 'approved'
  const title = type === 'agency' ? '代理商审核意见' : '品牌方终审意见'

  return (
    <Card className={isApproved ? 'border-accent-green/30' : 'border-accent-coral/30'}>
      <CardHeader>
        <CardTitle className="flex items-center gap-2">
          {isApproved ? (
            <CheckCircle size={18} className="text-accent-green" />
          ) : (
            <XCircle size={18} className="text-accent-coral" />
          )}
          {title}
        </CardTitle>
      </CardHeader>
      <CardContent>
        <div className="flex items-center gap-2 mb-2">
          <span className="font-medium text-text-primary">{review.reviewer}</span>
          {isApproved ? <SuccessTag>通过</SuccessTag> : <ErrorTag>驳回</ErrorTag>}
        </div>
        <p className="text-text-secondary">{review.comment}</p>
        <p className="text-xs text-text-tertiary mt-2">{review.time}</p>
      </CardContent>
    </Card>
  )
}

function WaitingSection({ message }: { message: string }) {
  return (
    <Card>
      <CardContent className="py-8 text-center">
        <Clock size={48} className="mx-auto text-accent-indigo mb-4" />
        <h3 className="text-lg font-medium text-text-primary mb-2">{message}</h3>
        <p className="text-text-secondary">请耐心等待，审核结果将通过消息通知您</p>
      </CardContent>
    </Card>
  )
}

function SuccessSection({ onContinue }: { onContinue: () => void }) {
  return (
    <Card className="border-accent-green/30">
      <CardContent className="py-8 text-center">
        <CheckCircle size={48} className="mx-auto text-accent-green mb-4" />
        <h3 className="text-lg font-medium text-text-primary mb-2">脚本审核通过！</h3>
        <p className="text-text-secondary mb-6">您可以开始拍摄视频了</p>
        <Button onClick={onContinue}>
          上传视频
        </Button>
      </CardContent>
    </Card>
  )
}

export default function CreatorScriptPage() {
  const router = useRouter()
  const params = useParams()
  const searchParams = useSearchParams()
  const status = searchParams.get('status') || 'pending_upload'

  const [task, setTask] = useState(getTaskByStatus(status))

  // 模拟状态切换
  const simulateUpload = () => {
    setTask(getTaskByStatus('ai_reviewing'))
    setTimeout(() => {
      setTask(getTaskByStatus('ai_result'))
    }, 4000)
  }

  const handleResubmit = () => {
    setTask(getTaskByStatus('pending_upload'))
  }

  const handleContinueToVideo = () => {
    router.push(`/creator/task/${params.id}/video`)
  }

  const getStatusDisplay = () => {
    switch (task.scriptStatus) {
      case 'pending_upload': return '待上传脚本'
      case 'ai_reviewing': return 'AI 审核中'
      case 'ai_result': return 'AI 审核完成'
      case 'agent_reviewing': return '代理商审核中'
      case 'agent_rejected': return '代理商驳回'
      case 'brand_reviewing': return '品牌方终审中'
      case 'brand_passed': return '审核通过'
      case 'brand_rejected': return '品牌方驳回'
      default: return '未知状态'
    }
  }

  return (
    <div className="space-y-6 max-w-2xl mx-auto">
      {/* 顶部导航 */}
      <div className="flex items-center gap-4">
        <button type="button" onClick={() => router.back()} className="p-2 hover:bg-bg-elevated rounded-full">
          <ArrowLeft size={20} className="text-text-primary" />
        </button>
        <div className="flex-1">
          <h1 className="text-xl font-bold text-text-primary">{task.projectName}</h1>
          <p className="text-sm text-text-secondary">脚本阶段 · {getStatusDisplay()}</p>
        </div>
      </div>

      {/* 审核流程进度条 */}
      <Card>
        <CardContent className="py-4">
          <ReviewSteps steps={getReviewSteps(task.scriptStatus)} />
        </CardContent>
      </Card>

      {/* 根据状态显示不同内容 */}
      {task.scriptStatus === 'pending_upload' && (
        <UploadSection onUpload={simulateUpload} />
      )}

      {task.scriptStatus === 'ai_reviewing' && (
        <AIReviewingSection />
      )}

      {task.scriptStatus === 'ai_result' && (
        <>
          <AIResultSection task={task} />
          <WaitingSection message="等待代理商审核" />
        </>
      )}

      {task.scriptStatus === 'agent_reviewing' && (
        <>
          <AIResultSection task={task} />
          <WaitingSection message="等待代理商审核" />
        </>
      )}

      {task.scriptStatus === 'agent_rejected' && task.agencyReview && (
        <>
          <ReviewFeedbackSection review={task.agencyReview} type="agency" />
          <AIResultSection task={task} />
          <div className="flex gap-3">
            <Button variant="secondary" onClick={handleResubmit} fullWidth>
              <RefreshCw size={16} />
              重新上传
            </Button>
          </div>
        </>
      )}

      {task.scriptStatus === 'brand_reviewing' && task.agencyReview && (
        <>
          <ReviewFeedbackSection review={task.agencyReview} type="agency" />
          <AIResultSection task={task} />
          <WaitingSection message="等待品牌方终审" />
        </>
      )}

      {task.scriptStatus === 'brand_passed' && task.agencyReview && task.brandReview && (
        <>
          <SuccessSection onContinue={handleContinueToVideo} />
          <ReviewFeedbackSection review={task.brandReview} type="brand" />
          <ReviewFeedbackSection review={task.agencyReview} type="agency" />
          <AIResultSection task={task} />
        </>
      )}

      {task.scriptStatus === 'brand_rejected' && task.agencyReview && task.brandReview && (
        <>
          <ReviewFeedbackSection review={task.brandReview} type="brand" />
          <ReviewFeedbackSection review={task.agencyReview} type="agency" />
          <AIResultSection task={task} />
          <div className="flex gap-3">
            <Button variant="secondary" onClick={handleResubmit} fullWidth>
              <RefreshCw size={16} />
              重新上传
            </Button>
          </div>
        </>
      )}
    </div>
  )
}