'use client'

import { useState, useEffect, useCallback } from 'react'
import { useRouter, useParams } from 'next/navigation'
import { useToast } from '@/components/ui/Toast'
import { ArrowLeft, Play, Pause, AlertTriangle, Shield, Radio, Loader2 } from 'lucide-react'
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/Card'
import { Button } from '@/components/ui/Button'
import { SuccessTag, WarningTag, ErrorTag } from '@/components/ui/Tag'
import { Modal, ConfirmModal } from '@/components/ui/Modal'
import { ReviewSteps, getAgencyReviewSteps } from '@/components/ui/ReviewSteps'
import { api } from '@/lib/api'
import { USE_MOCK } from '@/contexts/AuthContext'
import { useSSE } from '@/contexts/SSEContext'
import type { TaskResponse, AIReviewResult } from '@/types/task'

// ==================== Mock 数据 ====================
const mockTask: TaskResponse = {
  id: 'task-001',
  name: '夏日护肤推广',
  sequence: 1,
  stage: 'script_agency_review',
  project: { id: 'proj-001', name: 'XX品牌618推广', brand_name: 'XX护肤品牌' },
  agency: { id: 'ag-001', name: '优创代理' },
  creator: { id: 'cr-001', name: '小美护肤' },
  script_ai_score: 85,
  script_ai_result: {
    score: 85,
    violations: [
      {
        type: '违禁词',
        content: '效果最好',
        severity: 'high',
        suggestion: '建议替换为"效果显著"',
        timestamp: 15.5,
        source: 'speech',
      },
      {
        type: '竞品露出',
        content: '疑似竞品Logo',
        severity: 'high',
        suggestion: '需人工确认是否为竞品露出',
        timestamp: 42.0,
        source: 'visual',
      },
    ],
    soft_warnings: [
      { type: '油腻预警', content: '达人表情过于夸张，建议检查', suggestion: '软性风险仅作提示' },
    ],
    summary: '视频整体合规，发现2处硬性问题和1处舆情提示需人工确认',
  },
  video_ai_score: 85,
  video_ai_result: {
    score: 85,
    violations: [
      {
        type: '违禁词',
        content: '效果最好',
        severity: 'high',
        suggestion: '建议替换为"效果显著"',
        timestamp: 15.5,
        source: 'speech',
      },
      {
        type: '竞品露出',
        content: '疑似竞品Logo',
        severity: 'high',
        suggestion: '需人工确认是否为竞品露出',
        timestamp: 42.0,
        source: 'visual',
      },
    ],
    soft_warnings: [
      { type: '油腻预警', content: '达人表情过于夸张，建议检查', suggestion: '软性风险仅作提示' },
    ],
    summary: '视频整体合规，发现2处硬性问题和1处舆情提示需人工确认',
  },
  appeal_count: 0,
  is_appeal: false,
  created_at: '2026-02-03T10:30:00Z',
  updated_at: '2026-02-03T10:35:00Z',
}

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

function getReviewStepStatus(task: TaskResponse): string {
  if (task.stage.includes('agency_review')) return 'agent_reviewing'
  if (task.stage.includes('brand_review')) return 'brand_reviewing'
  if (task.stage === 'completed') return 'completed'
  return 'agent_reviewing'
}

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

// ==================== 子组件 ====================

function ReviewProgressBar({ taskStatus }: { taskStatus: string }) {
  const steps = getAgencyReviewSteps(taskStatus)
  const currentStep = steps.find(s => s.status === 'current')

  return (
    <Card className="mb-6">
      <CardContent className="py-4">
        <div className="flex items-center justify-between mb-3">
          <span className="text-sm font-medium text-text-primary">审核流程</span>
          <span className="text-sm text-accent-indigo font-medium">
            当前：{currentStep?.label || '代理商审核'}
          </span>
        </div>
        <ReviewSteps steps={steps} />
      </CardContent>
    </Card>
  )
}

function RiskLevelTag({ level }: { level: string }) {
  if (level === 'high') return <ErrorTag>高风险</ErrorTag>
  if (level === 'medium') return <WarningTag>中风险</WarningTag>
  return <SuccessTag>低风险</SuccessTag>
}

function ReviewSkeleton() {
  return (
    <div className="space-y-4 animate-pulse">
      <div className="flex items-center gap-4">
        <div className="w-10 h-10 bg-bg-elevated rounded-full" />
        <div className="space-y-2">
          <div className="h-6 w-48 bg-bg-elevated rounded" />
          <div className="h-4 w-64 bg-bg-elevated rounded" />
        </div>
      </div>
      <div className="h-16 bg-bg-elevated rounded-xl" />
      <div className="grid grid-cols-1 lg:grid-cols-5 gap-6">
        <div className="lg:col-span-3 space-y-4">
          <div className="h-64 bg-bg-elevated rounded-xl" />
          <div className="h-20 bg-bg-elevated rounded-xl" />
        </div>
        <div className="lg:col-span-2 space-y-4">
          <div className="h-48 bg-bg-elevated rounded-xl" />
          <div className="h-32 bg-bg-elevated rounded-xl" />
        </div>
      </div>
    </div>
  )
}

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

export default function ReviewPage() {
  const router = useRouter()
  const params = useParams()
  const toast = useToast()
  const taskId = params.id as string
  const { subscribe } = useSSE()

  const [task, setTask] = useState<TaskResponse | null>(null)
  const [loading, setLoading] = useState(true)
  const [submitting, setSubmitting] = useState(false)
  const [isPlaying, setIsPlaying] = useState(false)
  const [showApproveModal, setShowApproveModal] = useState(false)
  const [showRejectModal, setShowRejectModal] = useState(false)
  const [showForcePassModal, setShowForcePassModal] = useState(false)
  const [rejectReason, setRejectReason] = useState('')
  const [forcePassReason, setForcePassReason] = useState('')
  const [saveAsException, setSaveAsException] = useState(false)
  const [checkedViolations, setCheckedViolations] = useState<Record<string, boolean>>({})

  const loadTask = useCallback(async () => {
    if (USE_MOCK) {
      setTask(mockTask)
      setLoading(false)
      return
    }

    try {
      const data = await api.getTask(taskId)
      setTask(data)
    } catch (err) {
      console.error('Failed to load task:', err)
      toast.error('加载任务失败')
    } finally {
      setLoading(false)
    }
  }, [taskId, toast])

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

  useEffect(() => {
    const unsub1 = subscribe('task_updated', (data: any) => {
      if (data?.task_id === taskId) loadTask()
    })
    const unsub2 = subscribe('review_completed', (data: any) => {
      if (data?.task_id === taskId) loadTask()
    })
    return () => { unsub1(); unsub2() }
  }, [subscribe, taskId, loadTask])

  if (loading || !task) return <ReviewSkeleton />

  // Determine if this is script or video review
  const isVideoReview = task.stage.includes('video')
  const aiResult: AIReviewResult | null | undefined = isVideoReview ? task.video_ai_result : task.script_ai_result
  const aiScore = isVideoReview ? task.video_ai_score : task.script_ai_score

  const violations = aiResult?.violations || []
  const softWarnings = aiResult?.soft_warnings || []
  const aiSummary = aiResult?.summary || '暂无 AI 分析总结'

  const handleApprove = async () => {
    setSubmitting(true)
    try {
      if (!USE_MOCK) {
        if (isVideoReview) {
          await api.reviewVideo(taskId, { action: 'pass' })
        } else {
          await api.reviewScript(taskId, { action: 'pass' })
        }
      }
      toast.success('审核已通过')
      setShowApproveModal(false)
      router.push('/agency/review')
    } catch (err) {
      console.error('Failed to approve:', err)
      toast.error('操作失败，请重试')
    } finally {
      setSubmitting(false)
    }
  }

  const handleReject = async () => {
    if (!rejectReason.trim()) {
      toast.error('请填写驳回原因')
      return
    }
    setSubmitting(true)
    try {
      if (!USE_MOCK) {
        if (isVideoReview) {
          await api.reviewVideo(taskId, { action: 'reject', comment: rejectReason })
        } else {
          await api.reviewScript(taskId, { action: 'reject', comment: rejectReason })
        }
      }
      toast.success('已驳回')
      setShowRejectModal(false)
      router.push('/agency/review')
    } catch (err) {
      console.error('Failed to reject:', err)
      toast.error('操作失败，请重试')
    } finally {
      setSubmitting(false)
    }
  }

  const handleForcePass = async () => {
    if (!forcePassReason.trim()) {
      toast.error('请填写强制通过原因')
      return
    }
    setSubmitting(true)
    try {
      if (!USE_MOCK) {
        if (isVideoReview) {
          await api.reviewVideo(taskId, { action: 'force_pass', comment: forcePassReason })
        } else {
          await api.reviewScript(taskId, { action: 'force_pass', comment: forcePassReason })
        }
      }
      toast.success('已强制通过')
      setShowForcePassModal(false)
      router.push('/agency/review')
    } catch (err) {
      console.error('Failed to force pass:', err)
      toast.error('操作失败，请重试')
    } finally {
      setSubmitting(false)
    }
  }

  // 时间线标记
  const timelineMarkers = [
    ...violations.filter(v => v.timestamp != null).map(v => ({ time: v.timestamp!, type: 'hard' as const })),
  ].sort((a, b) => a.time - b.time)

  const maxTime = Math.max(120, ...timelineMarkers.map(m => m.time + 10))

  return (
    <div className="space-y-4">
      {/* 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.name}</h1>
          <p className="text-sm text-text-secondary">
            {task.creator.name} · {task.project.brand_name || task.project.name} · {isVideoReview ? '视频审核' : '脚本审核'}
          </p>
        </div>
        {task.is_appeal && (
          <span className="px-3 py-1 bg-accent-amber/20 text-accent-amber rounded-full text-sm font-medium">
            申诉重审
          </span>
        )}
      </div>

      {/* 申诉理由 */}
      {task.is_appeal && task.appeal_reason && (
        <Card className="border-accent-amber/30 bg-accent-amber/5">
          <CardContent className="py-3">
            <p className="text-sm text-accent-amber font-medium mb-1">申诉理由</p>
            <p className="text-sm text-text-secondary">{task.appeal_reason}</p>
          </CardContent>
        </Card>
      )}

      {/* 审核流程进度条 */}
      <ReviewProgressBar taskStatus={getReviewStepStatus(task)} />

      <div className="grid grid-cols-1 lg:grid-cols-5 gap-6">
        {/* 左侧：视频/脚本播放器 (3/5) */}
        <div className="lg:col-span-3 space-y-4">
          <Card>
            <CardContent className="p-0">
              {isVideoReview ? (
                <div className="aspect-video bg-gray-900 rounded-t-lg flex items-center justify-center relative">
                  <button
                    type="button"
                    className="w-16 h-16 bg-white/20 rounded-full flex items-center justify-center hover:bg-white/30 transition-colors"
                    onClick={() => setIsPlaying(!isPlaying)}
                  >
                    {isPlaying ? <Pause size={32} className="text-white" /> : <Play size={32} className="text-white ml-1" />}
                  </button>
                </div>
              ) : (
                <div className="aspect-[4/3] bg-bg-elevated rounded-t-lg flex items-center justify-center">
                  <div className="text-center">
                    <p className="text-text-secondary">脚本预览区域</p>
                    <p className="text-sm text-text-tertiary mt-1">{task.script_file_name || '脚本文件'}</p>
                  </div>
                </div>
              )}

              {/* 智能进度条（仅视频且有时间标记时显示） */}
              {isVideoReview && timelineMarkers.length > 0 && (
                <div className="p-4 border-t border-border-subtle">
                  <div className="text-sm font-medium text-text-primary mb-3">智能进度条（点击跳转）</div>
                  <div className="relative h-3 bg-bg-elevated rounded-full">
                    {timelineMarkers.map((marker, idx) => (
                      <button
                        key={idx}
                        type="button"
                        className={`absolute top-1/2 -translate-y-1/2 w-4 h-4 rounded-full border-2 border-bg-card shadow-md cursor-pointer transition-transform hover:scale-125 ${
                          marker.type === 'hard' ? 'bg-accent-coral' : 'bg-orange-500'
                        }`}
                        style={{ left: `${(marker.time / maxTime) * 100}%` }}
                        title={`${formatTimestamp(marker.time)} - 硬性问题`}
                      />
                    ))}
                  </div>
                  <div className="flex justify-between text-xs text-text-tertiary mt-1">
                    <span>0:00</span>
                    <span>{formatTimestamp(maxTime)}</span>
                  </div>
                  <div className="flex gap-4 mt-3 text-xs text-text-secondary">
                    <span className="flex items-center gap-1">
                      <span className="w-3 h-3 bg-accent-coral rounded-full" />
                      硬性问题
                    </span>
                    <span className="flex items-center gap-1">
                      <span className="w-3 h-3 bg-orange-500 rounded-full" />
                      舆情提示
                    </span>
                    <span className="flex items-center gap-1">
                      <span className="w-3 h-3 bg-accent-green rounded-full" />
                      卖点覆盖
                    </span>
                  </div>
                </div>
              )}
            </CardContent>
          </Card>

          {/* AI 分析总结 */}
          <Card>
            <CardContent className="py-4">
              <div className="flex items-center justify-between mb-2">
                <span className="font-medium text-text-primary">AI 分析总结</span>
                {aiScore != null && (
                  <span className={`text-xl font-bold ${aiScore >= 80 ? 'text-accent-green' : aiScore >= 60 ? 'text-yellow-400' : 'text-accent-coral'}`}>
                    {aiScore}分
                  </span>
                )}
              </div>
              <p className="text-text-secondary text-sm">{aiSummary}</p>
            </CardContent>
          </Card>
        </div>

        {/* 右侧：AI 检查单 (2/5) */}
        <div className="lg:col-span-2 space-y-4">
          {/* 硬性合规 */}
          <Card>
            <CardHeader className="pb-2">
              <CardTitle className="flex items-center gap-2 text-base">
                <Shield size={16} className="text-red-500" />
                硬性合规 ({violations.length})
              </CardTitle>
            </CardHeader>
            <CardContent className="space-y-3">
              {violations.length > 0 ? violations.map((v, idx) => {
                const key = `v-${idx}`
                return (
                  <div key={key} className={`p-3 rounded-lg border ${checkedViolations[key] ? 'bg-bg-elevated border-border-subtle' : 'bg-accent-coral/10 border-accent-coral/30'}`}>
                    <div className="flex items-start gap-2">
                      <input
                        type="checkbox"
                        checked={checkedViolations[key] || false}
                        onChange={() => setCheckedViolations((prev) => ({ ...prev, [key]: !prev[key] }))}
                        className="mt-1 accent-accent-indigo"
                      />
                      <div className="flex-1">
                        <div className="flex items-center gap-2 mb-1">
                          <ErrorTag>{v.type}</ErrorTag>
                          {v.timestamp != null && (
                            <span className="text-xs text-text-tertiary">{formatTimestamp(v.timestamp)}</span>
                          )}
                        </div>
                        <p className="text-sm font-medium text-text-primary">「{v.content}」</p>
                        <p className="text-xs text-accent-indigo mt-1">{v.suggestion}</p>
                      </div>
                    </div>
                  </div>
                )
              }) : (
                <div className="text-center py-4 text-text-tertiary text-sm">无硬性违规</div>
              )}
            </CardContent>
          </Card>

          {/* 舆情雷达 */}
          {softWarnings.length > 0 && (
            <Card>
              <CardHeader className="pb-2">
                <CardTitle className="flex items-center gap-2 text-base">
                  <Radio size={16} className="text-orange-500" />
                  舆情雷达（仅提示）
                </CardTitle>
              </CardHeader>
              <CardContent className="space-y-2">
                {softWarnings.map((w, idx) => (
                  <div key={idx} className="p-3 bg-orange-500/10 rounded-lg border border-orange-500/30">
                    <div className="flex items-center gap-2 mb-1">
                      <WarningTag>{w.type}</WarningTag>
                    </div>
                    <p className="text-sm text-orange-400">{w.content}</p>
                    <p className="text-xs text-text-tertiary mt-1">软性风险仅作提示，不强制拦截</p>
                  </div>
                ))}
              </CardContent>
            </Card>
          )}
        </div>
      </div>

      {/* 底部决策栏 */}
      <Card className="sticky bottom-4 shadow-lg">
        <CardContent className="py-4">
          <div className="flex items-center justify-between">
            <div className="text-sm text-text-secondary">
              已检查 {Object.values(checkedViolations).filter(Boolean).length}/{violations.length} 个问题
            </div>
            <div className="flex gap-3">
              <Button variant="danger" onClick={() => setShowRejectModal(true)} disabled={submitting}>
                驳回
              </Button>
              <Button variant="secondary" onClick={() => setShowForcePassModal(true)} disabled={submitting}>
                强制通过
              </Button>
              <Button variant="success" onClick={() => setShowApproveModal(true)} disabled={submitting}>
                {submitting ? <Loader2 size={16} className="animate-spin" /> : null}
                通过
              </Button>
            </div>
          </div>
        </CardContent>
      </Card>

      {/* 通过确认弹窗 */}
      <ConfirmModal
        isOpen={showApproveModal}
        onClose={() => setShowApproveModal(false)}
        onConfirm={handleApprove}
        title="确认通过"
        message={`确定要通过此${isVideoReview ? '视频' : '脚本'}的审核吗？通过后达人将收到通知。`}
        confirmText="确认通过"
      />

      {/* 驳回弹窗 */}
      <Modal isOpen={showRejectModal} onClose={() => setShowRejectModal(false)} title="驳回审核">
        <div className="space-y-4">
          <p className="text-text-secondary text-sm">请填写驳回原因，已勾选的问题将自动打包发送给达人。</p>
          <div className="p-3 bg-bg-elevated rounded-lg">
            <p className="text-sm font-medium text-text-primary mb-2">
              已选问题 ({Object.values(checkedViolations).filter(Boolean).length})
            </p>
            {violations.filter((_, idx) => checkedViolations[`v-${idx}`]).map((v, idx) => (
              <div key={idx} className="text-sm text-text-secondary">- {v.type}: {v.content}</div>
            ))}
            {Object.values(checkedViolations).filter(Boolean).length === 0 && (
              <div className="text-sm text-text-tertiary">未选择任何问题</div>
            )}
          </div>
          <div>
            <label className="block text-sm font-medium text-text-primary mb-1">补充说明</label>
            <textarea
              className="w-full h-24 p-3 border border-border-subtle rounded-lg resize-none bg-bg-elevated text-text-primary focus:outline-none focus:ring-2 focus:ring-accent-indigo"
              placeholder="请详细说明驳回原因..."
              value={rejectReason}
              onChange={(e) => setRejectReason(e.target.value)}
            />
          </div>
          <div className="flex gap-3 justify-end">
            <Button variant="ghost" onClick={() => setShowRejectModal(false)} disabled={submitting}>取消</Button>
            <Button variant="danger" onClick={handleReject} disabled={submitting}>
              {submitting && <Loader2 size={16} className="animate-spin" />}
              确认驳回
            </Button>
          </div>
        </div>
      </Modal>

      {/* 强制通过弹窗 */}
      <Modal isOpen={showForcePassModal} onClose={() => setShowForcePassModal(false)} title="强制通过">
        <div className="space-y-4">
          <div className="p-3 bg-yellow-500/10 rounded-lg border border-yellow-500/30">
            <p className="text-sm text-yellow-400">
              <AlertTriangle size={14} className="inline mr-1" />
              强制通过将跳过所有问题检测，操作将被记录
            </p>
          </div>
          <div>
            <label className="block text-sm font-medium text-text-primary mb-1">放行原因（必填）</label>
            <textarea
              className="w-full h-24 p-3 border border-border-subtle rounded-lg resize-none bg-bg-elevated text-text-primary focus:outline-none focus:ring-2 focus:ring-accent-indigo"
              placeholder="例如：达人玩的新梗，品牌方认可"
              value={forcePassReason}
              onChange={(e) => setForcePassReason(e.target.value)}
            />
          </div>
          <label className="flex items-center gap-2 cursor-pointer">
            <input
              type="checkbox"
              checked={saveAsException}
              onChange={(e) => setSaveAsException(e.target.checked)}
              className="rounded accent-accent-indigo"
            />
            <span className="text-sm text-text-secondary">保存为特例（需品牌方确认后生效）</span>
          </label>
          <div className="flex gap-3 justify-end">
            <Button variant="ghost" onClick={() => setShowForcePassModal(false)} disabled={submitting}>取消</Button>
            <Button onClick={handleForcePass} disabled={submitting}>
              {submitting && <Loader2 size={16} className="animate-spin" />}
              确认强制通过
            </Button>
          </div>
        </div>
      </Modal>
    </div>
  )
}