'use client'

import { useEffect, useState, useRef, useCallback } from 'react'
import { useSession } from 'next-auth/react'
import { useRouter, useParams } from 'next/navigation'
import Image from 'next/image'
import { format } from 'date-fns'
import Header from '@/components/Header'
import VideoPlayerModal from '@/components/VideoPlayerModal'
import SkuList from '@/components/SkuList'
import SkuEditModal from '@/components/SkuEditModal'
import ToastBubble from '@/components/ToastBubble'
import { useToast } from '@/hooks/useToast'
import AudioVisualizer from '@/components/AudioVisualizer'

interface Material {
  id: string
  userId: string
  previewUrl: string
  productModel: string
  categoryName: string
  sceneName: string
  platformName?: string // 平台分类
  productCategoryName?: string // 品类分类
  materialType: string
  authorName: string
  zipFileName: string
  zipFileSize: string | number
  downloadCount: number
  likeCount: number
  displayImages: string[] // PSD展示图片URLs
  createdAt: string
  videoSourceUrl?: string | null // 原始视频URL
  videoPreview540Url?: string | null // 720p预览视频URL（字段名保持540Url以兼容数据库）
  videoPreviewClipUrl?: string | null // 视频片段URL（10秒，无音频）
  videoCoverUrl?: string | null // 视频封面URL
  videoDuration?: number | null // 视频时长（秒）
  videoProcessingStatus?: string | null // 视频处理状态
  isLiked?: boolean // 是否已点赞
  isFavorited?: boolean // 是否已收藏
  skus?: Array<{
    id: string
    skuName: string
    filePath: string
    fileSize: string
    sortOrder: number
  }>
}

export default function SharePage() {
  const { data: session, status } = useSession()
  const router = useRouter()
  const params = useParams()
  const materialId = params?.id as string

  const [material, setMaterial] = useState<Material | null>(null)
  const [loading, setLoading] = useState(true)
  const [downloading, setDownloading] = useState(false)
  const [downloadProgress, setDownloadProgress] = useState(0)
  const [showBackToTop, setShowBackToTop] = useState(false)
  const [showVideoModal, setShowVideoModal] = useState(false)
  const [videoSrc, setVideoSrc] = useState<string | null>(null)
  const [showSkuEditModal, setShowSkuEditModal] = useState(false)
  const { toast, showToast } = useToast() // 统一的Toast提示
  // 音频播放状态
  const audioRef = useRef<HTMLAudioElement | null>(null)
  const [playingAudio, setPlayingAudio] = useState(false)
  const [audioProgress, setAudioProgress] = useState(0) // 0-100

  useEffect(() => {
    // 分享页面允许未登录访问
    if (status !== 'loading') {
      fetchMaterial()
    }
  }, [status, materialId])

  useEffect(() => {
    // 监听滚动，控制返回顶部按钮显示
    const handleScroll = () => {
      setShowBackToTop(window.scrollY > 400)
    }
    window.addEventListener('scroll', handleScroll)
    return () => window.removeEventListener('scroll', handleScroll)
  }, [])

  const fetchMaterial = async () => {
    try {
      const response = await fetch(`/api/materials/share?id=${materialId}`)
      if (response.ok) {
        const data = await response.json()
        setMaterial(data)
        
        // 如果是标准模型类型，获取SKU列表
        if (data.materialType === '标准模型') {
          const skuResponse = await fetch(`/api/materials/${materialId}/skus`)
          if (skuResponse.ok) {
            const skuData = await skuResponse.json()
            setMaterial(prev => prev ? { ...prev, skus: skuData.skus } : null)
          }
        }
      } else {
        showToast('素材不存在或已被删除', { variant: 'error' })
        router.push('/')
      }
    } catch (error) {
      console.error('Error fetching material:', error)
      showToast('加载失败', { variant: 'error' })
      router.push('/')
    } finally {
      setLoading(false)
    }
  }

  const formatFileSize = (bytes: string | number): string => {
    const size = typeof bytes === 'string' ? parseInt(bytes) : bytes
    if (size === 0) return '未知'
    const units = ['B', 'KB', 'MB', 'GB']
    const i = Math.floor(Math.log(size) / Math.log(1024))
    return `${(size / Math.pow(1024, i)).toFixed(2)} ${units[i]}`
  }

  const scrollToTop = () => {
    window.scrollTo({ top: 0, behavior: 'smooth' })
  }

  // 音频播放控制
  const handleAudioPlay = useCallback(() => {
    if (!material || material.materialType !== '音乐') {
      console.warn('[Share] handleAudioPlay: material is not music type', material?.materialType)
      return
    }

    // 如果正在播放，则暂停
    if (playingAudio) {
      if (audioRef.current) {
        audioRef.current.pause()
      }
      setPlayingAudio(false)
      setAudioProgress(0)
      return
    }

    // 如果音频已经加载，直接播放
    if (audioRef.current && audioRef.current.readyState >= 2) {
      audioRef.current.play().then(() => {
        setPlayingAudio(true)
      }).catch((error) => {
        console.error('[Share] Audio play failed:', error)
        showToast(`播放失败: ${error.message || '未知错误'}`, { variant: 'error' })
      })
      return
    }

    // 停止之前的音频
    if (audioRef.current) {
      audioRef.current.pause()
      audioRef.current = null
    }

    // 创建新的音频元素
    // 如果zipFileName是HTTP URL（老素材），直接使用；否则加上/uploads/前缀（新素材）
    let audioUrl = ''
    if (material.zipFileName) {
      const zipFileName = material.zipFileName
      if (zipFileName.startsWith('http://') || zipFileName.startsWith('https://')) {
        // 老素材：zipFileName是完整的S3 URL
        audioUrl = zipFileName
      } else {
        // 新素材：zipFileName只是文件名，需要加上/uploads/前缀
        audioUrl = `/uploads/${zipFileName}`
      }
    }
    
    console.log('[Share] Audio URL:', audioUrl, 'Material:', { id: material.id, zipFileName: material.zipFileName })
    
    if (!audioUrl) {
      console.error('[Share] No audio URL found for material:', material.id)
      showToast('音频文件不存在', { variant: 'error' })
      return
    }

    const audio = new Audio(audioUrl)
    audio.preload = 'auto' // 预加载音频
    audioRef.current = audio

    // 监听加载错误
    audio.addEventListener('error', (e) => {
      const error = audio.error
      console.error('[Share] Audio error:', {
        code: error?.code,
        message: error?.message,
        audioUrl,
        materialId: material.id
      })
      showToast(`音频加载失败: ${error?.message || '未知错误'}`, { variant: 'error' })
      setPlayingAudio(false)
      setAudioProgress(0)
      audioRef.current = null
    })

    // 监听可以播放（使用canplay事件，有足够数据就开始播放，减少延迟）
    const handleCanPlay = () => {
      console.log('[Share] Audio can play:', audioUrl)
      audio.play().then(() => {
        console.log('[Share] Audio playback started:', audioUrl)
        setPlayingAudio(true)
      }).catch((error) => {
        console.error('[Share] Audio play failed:', error, 'URL:', audioUrl)
        showToast(`播放失败: ${error.message || '未知错误'}`, { variant: 'error' })
        setPlayingAudio(false)
        audioRef.current = null
      })
      audio.removeEventListener('canplay', handleCanPlay)
    }
    audio.addEventListener('canplay', handleCanPlay)
    
    // 如果音频已经可以播放，立即播放
    if (audio.readyState >= 2) {
      handleCanPlay()
    }

    // 监听播放进度
    audio.addEventListener('timeupdate', () => {
      if (audio.duration) {
        setAudioProgress((audio.currentTime / audio.duration) * 100)
      }
    })

    // 监听播放结束
    audio.addEventListener('ended', () => {
      setPlayingAudio(false)
      setAudioProgress(0)
    })

    // 开始加载音频
    audio.load()
  }, [material, playingAudio, showToast])

  // 组件卸载时清理音频
  useEffect(() => {
    return () => {
      if (audioRef.current) {
        audioRef.current.pause()
        audioRef.current = null
      }
    }
  }, [])

  const handleDownload = () => {
    if (!material) return

    setDownloading(true)
    setDownloadProgress(0)

    const xhr = new XMLHttpRequest()

    xhr.addEventListener('progress', (e) => {
      if (e.lengthComputable) {
        const percentComplete = Math.round((e.loaded / e.total) * 100)
        setDownloadProgress(percentComplete)
      }
    })

    xhr.addEventListener('load', () => {
      if (xhr.status === 200) {
        try {
          const blob = new Blob([xhr.response], { type: 'application/zip' })
          
          const contentDisposition = xhr.getResponseHeader('Content-Disposition')
          let filename = 'material.zip'
          if (contentDisposition) {
            const filenameMatch = contentDisposition.match(/filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/)
            if (filenameMatch && filenameMatch[1]) {
              filename = decodeURIComponent(filenameMatch[1].replace(/['"]/g, ''))
            }
          }
          
          const url = window.URL.createObjectURL(blob)
          const a = document.createElement('a')
          a.href = url
          a.download = filename
          document.body.appendChild(a)
          a.click()
          a.remove()
          window.URL.revokeObjectURL(url)
        } catch (error) {
          console.error('下载处理失败:', error)
          showToast('下载失败，请稍后重试', { variant: 'error' })
        }
      } else {
        showToast('下载失败', { variant: 'error' })
      }
      setDownloading(false)
      setDownloadProgress(0)
    })

    xhr.addEventListener('error', () => {
      showToast('下载失败，请稍后重试', { variant: 'error' })
      setDownloading(false)
      setDownloadProgress(0)
    })

    xhr.open('GET', `/api/materials/download?id=${material.id}`)
    xhr.responseType = 'arraybuffer'
    xhr.send()
  }

  if (loading) {
    return (
      <div className="min-h-screen bg-gray-50 dark:bg-gray-900">
        <main className="container mx-auto px-4 py-8">
          <div className="text-center py-16">
            <p className="text-gray-500 dark:text-gray-400 text-lg">加载中...</p>
          </div>
        </main>
      </div>
    )
  }

  if (!material) {
    return (
      <div className="min-h-screen bg-gray-50 dark:bg-gray-900">
        <Header session={session} />
        <main className="container mx-auto px-4 py-8">
          <div className="text-center py-16">
            <p className="text-gray-500 dark:text-gray-400 text-lg">素材不存在</p>
          </div>
        </main>
      </div>
    )
  }

  return (
    <div className="min-h-screen bg-gray-50 dark:bg-gray-900">
      <Header session={session} />
      <main className="container mx-auto px-4 py-8">
        {/* 所有素材类型统一使用左右布局 */}
        <div className="flex gap-8 max-w-7xl mx-auto">
          {/* 左侧：预览图（固定790px宽度） */}
          <div className="flex-shrink-0" style={{ width: '790px' }}>
            <div className="bg-white dark:bg-gray-800 rounded-2xl shadow-lg overflow-hidden">
              {(() => {
                // 判断是否为视频类型
                const isVideoType = material.materialType === '主图视频' || material.materialType === '安装视频' || material.materialType === '种草视频'
                const videoUrl = material.videoPreviewClipUrl || material.videoPreview540Url || material.videoSourceUrl
                const posterUrl = material.videoCoverUrl || material.previewUrl
                
                if ((material.materialType === '详情页' || material.materialType === '模特') && material.displayImages && material.displayImages.length > 0) {
                  /* 详情页/模特类型：显示多张展示图 */
                  return (
                    <div className="w-full bg-gray-200 dark:bg-gray-700 flex flex-col items-center">
                      {material.displayImages.map((imageUrl, index) => (
                        <div key={index} className="relative" style={{ maxWidth: '790px', width: '100%' }}>
                          <Image
                            src={imageUrl}
                            alt={`${material.productModel} - 展示图 ${index + 1}`}
                            width={790}
                            height={1500}
                            unoptimized
                            className="w-full h-auto"
                            style={{ display: 'block', maxWidth: '790px' }}
                          />
                        </div>
                      ))}
                    </div>
                  )
                } else if (isVideoType && videoUrl) {
                  /* 视频类型：显示视频预览（可点击播放完整视频） */
                  return (
                    <div 
                      className="relative w-full bg-gray-200 dark:bg-gray-700 cursor-pointer group"
                      onClick={() => {
                        // 优先使用720p预览，其次使用10秒片段，最后使用源视频
                        const playUrl = material.videoPreview540Url || material.videoPreviewClipUrl || material.videoSourceUrl
                        if (playUrl) {
                          setVideoSrc(playUrl)
                          setShowVideoModal(true)
                        }
                      }}
                    >
                      <video
                        src={material.videoPreviewClipUrl || material.videoPreview540Url || undefined}
                        poster={posterUrl || undefined}
                        className="w-full h-auto object-contain"
                        muted
                        loop
                        playsInline
                        preload="metadata"
                      />
                      {/* 播放按钮覆盖层 */}
                      <div className="absolute inset-0 flex items-center justify-center bg-black/0 group-hover:bg-black/20 transition-all">
                        <div className="w-16 h-16 bg-white/90 rounded-full flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity">
                          <svg className="w-8 h-8 text-gray-900 ml-1" fill="currentColor" viewBox="0 0 24 24">
                            <path d="M8 5v14l11-7z" />
                          </svg>
                        </div>
                      </div>
                      {/* 视频时长角标 */}
                      {material.videoDuration && (
                        <div className="absolute bottom-2 right-2 bg-black/70 text-white px-2 py-1 rounded text-xs font-medium">
                          {Math.floor(material.videoDuration / 60)}:{(material.videoDuration % 60).toString().padStart(2, '0')}
                        </div>
                      )}
                    </div>
                  )
                } else if (material.materialType === '音乐') {
                  /* 音频类型：显示音频播放器和可视化 */
                  return (
                    <div className="relative w-full bg-gradient-to-b from-slate-800 to-slate-900 flex flex-col items-center justify-center" style={{ minHeight: '500px' }}>
                      {/* 圆形频谱可视化背景 - 只在播放时显示 */}
                      {playingAudio && (
                        <div className="absolute inset-0 flex items-center justify-center">
                          <AudioVisualizer
                            audioElement={audioRef.current}
                            isPlaying={true}
                            size="lg"
                            coverImage={material.previewUrl || null}
                            showCoverOnPause={true}
                          />
                        </div>
                      )}
                      {/* 播放进度条（底部） - 可点击和拖动 */}
                      {playingAudio && (
                        <div 
                          className="absolute bottom-0 left-0 right-0 h-2 bg-slate-700 z-20 cursor-pointer hover:h-3 transition-all group"
                          onClick={(e) => {
                            e.stopPropagation()
                            if (audioRef.current) {
                              const rect = e.currentTarget.getBoundingClientRect()
                              const percent = (e.clientX - rect.left) / rect.width
                              audioRef.current.currentTime = audioRef.current.duration * percent
                            }
                          }}
                          onMouseDown={(e) => {
                            e.stopPropagation()
                            const handleMouseMove = (moveEvent: MouseEvent) => {
                              if (audioRef.current) {
                                const rect = e.currentTarget.getBoundingClientRect()
                                const percent = Math.max(0, Math.min(1, (moveEvent.clientX - rect.left) / rect.width))
                                audioRef.current.currentTime = audioRef.current.duration * percent
                              }
                            }
                            const handleMouseUp = () => {
                              document.removeEventListener('mousemove', handleMouseMove)
                              document.removeEventListener('mouseup', handleMouseUp)
                            }
                            document.addEventListener('mousemove', handleMouseMove)
                            document.addEventListener('mouseup', handleMouseUp)
                          }}
                        >
                          <div 
                            className="h-full bg-blue-500 transition-all duration-100 relative"
                            style={{ width: `${audioProgress}%` }}
                          >
                            {/* 拖动手柄 */}
                            <div className="absolute right-0 top-1/2 -translate-y-1/2 w-3 h-3 bg-white rounded-full shadow-lg opacity-0 group-hover:opacity-100 transition-opacity" />
                          </div>
                        </div>
                      )}
                      {/* 信息覆盖层 */}
                      <div className="relative z-10 flex flex-col items-center justify-center p-8">
                        {/* 封面图（如果有，且未播放时显示） */}
                        {material.previewUrl && !playingAudio && (
                          <div className="mb-6">
                            <Image
                              src={material.previewUrl}
                              alt={material.productModel}
                              width={400}
                              height={400}
                              unoptimized
                              className="rounded-2xl shadow-xl"
                            />
                          </div>
                        )}
                        {/* 播放/暂停按钮 */}
                        <button
                          type="button"
                          onClick={handleAudioPlay}
                          className={`w-20 h-20 rounded-full backdrop-blur-sm flex items-center justify-center border transition-all ${
                            playingAudio 
                              ? "bg-white/30 border-white/50 hover:bg-white/40" 
                              : "bg-white/20 border-white/30 hover:scale-110 hover:bg-white/30"
                          }`}
                        >
                          {playingAudio ? (
                            <svg className="w-10 h-10 text-white" fill="currentColor" viewBox="0 0 24 24">
                              <path d="M6 4h4v16H6V4zm8 0h4v16h-4V4z" />
                            </svg>
                          ) : (
                            <svg className="w-10 h-10 text-white ml-1" fill="currentColor" viewBox="0 0 24 24">
                              <path d="M8 5v14l11-7z" />
                            </svg>
                          )}
                        </button>
                        {/* 音频名称 */}
                        <p className="text-white text-xl font-medium text-center px-4 mt-6 drop-shadow-lg">{material.productModel}</p>
                      </div>
                    </div>
                  )
                } else {
                  /* 其他类型：显示单张预览图（自适应高度） */
                  return (
                    <div className="w-full bg-gray-200 dark:bg-gray-700 flex items-center justify-center">
                      <Image
                        src={material.previewUrl}
                        alt={material.productModel}
                        width={790}
                        height={1000}
                        unoptimized
                        className="w-full h-auto object-contain"
                        style={{ display: 'block', maxWidth: '790px' }}
                      />
                    </div>
                  )
                }
              })()}
            </div>

            {/* 标准模型类型：显示SKU列表 */}
            {material.materialType === '标准模型' && (
              <div className="mt-8">
                <SkuList
                  materialId={materialId}
                  canEdit={!!(session?.user && ((session.user as any)?.id === material.userId || (session.user as any)?.role === 'ADMIN'))}
                  onEditClick={() => setShowSkuEditModal(true)}
                />
              </div>
            )}
          </div>

          {/* 右侧：素材信息（固定） */}
          <div className="w-80 flex-shrink-0">
            <div className="sticky top-24 bg-white dark:bg-gray-800 rounded-2xl shadow-lg p-8 space-y-6">
              {/* 标题和标签 - 统一间距 */}
              <div>
                <h1 className="text-2xl font-bold text-gray-900 dark:text-white mb-4">
                  {material.productModel}
                </h1>
                <div className="flex flex-wrap gap-2">
                  <span className="inline-flex items-center px-3 py-1 bg-blue-100 dark:bg-blue-900/30 text-blue-700 dark:text-blue-300 rounded-full text-sm font-medium">
                    {material.categoryName}
                  </span>
                  <span className="inline-flex items-center px-3 py-1 bg-green-100 dark:bg-green-900/30 text-green-700 dark:text-green-300 rounded-full text-sm font-medium">
                    {material.sceneName}
                  </span>
                  {material.materialType && (
                    <span className="inline-flex items-center px-3 py-1 bg-purple-100 dark:bg-purple-900/30 text-purple-700 dark:text-purple-300 rounded-full text-sm font-medium">
                      {material.materialType}
                    </span>
                  )}
                </div>
              </div>

              {/* 素材信息 - 统一字体和间距 */}
              <div className="space-y-4">
                <div>
                  <p className="text-sm text-gray-500 dark:text-gray-400 mb-1">作者</p>
                  <p className="text-base font-medium text-gray-900 dark:text-white">{material.authorName}</p>
                </div>
                <div>
                  <p className="text-sm text-gray-500 dark:text-gray-400 mb-1">文件大小</p>
                  <p className="text-base font-medium text-blue-600 dark:text-blue-400">{formatFileSize(material.zipFileSize)}</p>
                </div>
                <div className="grid grid-cols-2 gap-4">
                  <div>
                    <p className="text-sm text-gray-500 dark:text-gray-400 mb-1">下载次数</p>
                    <p className="text-base font-medium text-gray-900 dark:text-white">{material.downloadCount}</p>
                  </div>
                  <div>
                    <p className="text-sm text-gray-500 dark:text-gray-400 mb-1">点赞数</p>
                    <p className="text-base font-medium text-gray-900 dark:text-white">{material.likeCount}</p>
                  </div>
                </div>
                <div>
                  <p className="text-sm text-gray-500 dark:text-gray-400 mb-1">文件名</p>
                  <p className="text-sm text-gray-700 dark:text-gray-300 break-all">{material.zipFileName}</p>
                </div>
                <div>
                  <p className="text-sm text-gray-500 dark:text-gray-400 mb-1">上传时间</p>
                  <p className="text-sm text-gray-700 dark:text-gray-300">
                    {format(new Date(material.createdAt), 'yyyy-MM-dd HH:mm')}
                  </p>
                </div>
              </div>

              {/* 操作按钮 - 统一样式 */}
              <div className="space-y-3 pt-2">
                <button
                  onClick={handleDownload}
                  disabled={downloading}
                  className="w-full btn-primary py-3 text-base font-medium relative overflow-hidden disabled:opacity-75"
                >
                  {downloading ? (
                    <>
                      <div
                        className="absolute left-0 top-0 bottom-0 bg-blue-600 transition-all duration-300"
                        style={{ width: `${downloadProgress}%` }}
                      />
                      <span className="relative z-10 flex items-center justify-center gap-2">
                        <svg className="w-5 h-5 animate-spin" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
                        </svg>
                        下载中 {downloadProgress}%
                      </span>
                    </>
                  ) : (
                    <span className="flex items-center justify-center gap-2 whitespace-nowrap">
                      <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" />
                      </svg>
                      立即下载
                    </span>
                  )}
                </button>


                <button
                  onClick={() => router.back()}
                  className="w-full py-3 bg-gray-100 dark:bg-gray-700 text-gray-700 dark:text-gray-300 rounded-xl text-base font-medium hover:bg-gray-200 dark:hover:bg-gray-600 transition-colors"
                >
                  返回上一页
                </button>
              </div>
            </div>
          </div>
        </div>
      </main>

      {/* 返回顶部按钮 */}
      {showBackToTop && (
        <button
          onClick={scrollToTop}
          className="fixed bottom-8 right-8 w-12 h-12 bg-blue-600 hover:bg-blue-700 text-white rounded-full shadow-lg flex items-center justify-center transition-all z-50"
          title="返回顶部"
        >
          <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 10l7-7m0 0l7 7m-7-7v18" />
          </svg>
        </button>
      )}

      {/* Video Player Modal */}
      {showVideoModal && videoSrc && (
        <VideoPlayerModal
          videoSrc={videoSrc}
          onClose={() => {
            setShowVideoModal(false)
            setVideoSrc(null)
          }}
        />
      )}

      {/* SKU编辑模态框 */}
      {showSkuEditModal && material && (
        <SkuEditModal
          materialId={materialId}
          isOpen={showSkuEditModal}
          onClose={() => {
            setShowSkuEditModal(false)
          }}
          onSaved={() => {
            setShowSkuEditModal(false)
            // 重新获取SKU列表
            if (material.materialType === '标准模型') {
              fetch(`/api/materials/${materialId}/skus`)
                .then(res => res.json())
                .then(data => {
                  setMaterial(prev => prev ? { ...prev, skus: data.skus } : null)
                })
                .catch(console.error)
            }
          }}
        />
      )}

      {/* 统一的Toast提示 */}
      {toast && toast.show && (
        <ToastBubble message={toast.message} variant={toast.variant} />
      )}
    </div>
  )
}