"use client"
import React, { useEffect } from 'react'

interface ScreenshotGalleryProps {
  screenshots: string[]
  symbol: string
  timeframes: string[]
  enlargedImage: string | null
  onImageClick: (src: string) => void
  onClose: () => void
}

export default function ScreenshotGallery({ 
  screenshots, 
  symbol, 
  timeframes, 
  enlargedImage, 
  onImageClick, 
  onClose 
}: ScreenshotGalleryProps) {
  // Handle ESC key to close enlarged image
  useEffect(() => {
    const handleKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape' && enlargedImage) {
        onClose()
      }
    }

    if (enlargedImage) {
      document.addEventListener('keydown', handleKeyDown)
      return () => document.removeEventListener('keydown', handleKeyDown)
    }
  }, [enlargedImage, onClose])

  if (screenshots.length === 0) return null

  // Utility function to convert timeframe to sortable number
  const timeframeToMinutes = (timeframe: string): number => {
    const tf = timeframe.toLowerCase()
    if (tf.includes('5m') || tf === '5') return 5
    if (tf.includes('15m') || tf === '15') return 15
    if (tf.includes('30m') || tf === '30') return 30
    if (tf.includes('1h') || tf === '60') return 60
    if (tf.includes('2h') || tf === '120') return 120
    if (tf.includes('4h') || tf === '240') return 240
    if (tf.includes('1d') || tf === 'D') return 1440
    if (tf.includes('1w') || tf === 'W') return 10080
    if (tf.includes('1M') || tf === 'M') return 43200
    // Default fallback
    return parseInt(tf) || 999
  }

  // Extract timeframe from filename
  const extractTimeframeFromFilename = (filename: string) => {
    // First try to match the pattern _timeframe_
    const match = filename.match(/_(\d+|D|W|M)_/)
    if (match) {
      const tf = match[1]
      if (tf === 'D') return '1d'
      if (tf === 'W') return '1w'
      if (tf === 'M') return '1M'
      if (tf === '5') return '5m'
      if (tf === '15') return '15m'
      if (tf === '30') return '30m'
      if (tf === '60') return '1h'
      if (tf === '120') return '2h'
      if (tf === '240') return '4h'
      return `${tf}m`
    }
    
    // Try to match timeframe patterns anywhere in the filename
    const timeframePatterns = [
      { pattern: /5m|_5_/i, value: '5m' },
      { pattern: /15m|_15_/i, value: '15m' },
      { pattern: /30m|_30_/i, value: '30m' },
      { pattern: /1h|60m|_60_/i, value: '1h' },
      { pattern: /2h|120m|_120_/i, value: '2h' },
      { pattern: /4h|240m|_240_/i, value: '4h' },
      { pattern: /1d|daily|_D_/i, value: '1d' },
      { pattern: /1w|weekly|_W_/i, value: '1w' },
      { pattern: /1M|monthly|_M_/i, value: '1M' }
    ]
    
    for (const { pattern, value } of timeframePatterns) {
      if (pattern.test(filename)) {
        return value
      }
    }
    
    return 'Unknown'
  }

  // Helper function to detect layout from filename
  const detectLayout = (filename: string) => {
    if (filename.includes('_ai_')) return 'AI'
    if (filename.includes('_diy_') || filename.includes('_Diy module_')) return 'DIY'
    return 'Default'
  }

  // Create screenshot data with layout and timeframe information
  const screenshotData = screenshots.map((screenshot, index) => {
    const screenshotUrl = typeof screenshot === 'string' 
      ? screenshot 
      : (screenshot as any)?.url || String(screenshot)
    const filename = screenshotUrl.split('/').pop() || ''
    
    // Extract timeframe from filename first, then use timeframes array as fallback
    const extractedTimeframe = extractTimeframeFromFilename(filename)
    const timeframe = extractedTimeframe !== 'Unknown' 
      ? extractedTimeframe 
      : (timeframes[index] || extractedTimeframe)
    
    const layout = detectLayout(filename)
    
    return {
      screenshot,
      screenshotUrl,
      filename,
      timeframe,
      layout,
      index,
      sortOrder: timeframeToMinutes(timeframe)
    }
  })

  // Group screenshots by layout
  const aiScreenshots = screenshotData
    .filter(item => item.layout === 'AI')
    .sort((a, b) => a.sortOrder - b.sortOrder)
  
  const diyScreenshots = screenshotData
    .filter(item => item.layout === 'DIY')
    .sort((a, b) => a.sortOrder - b.sortOrder)
  
  const defaultScreenshots = screenshotData
    .filter(item => item.layout === 'Default')
    .sort((a, b) => a.sortOrder - b.sortOrder)

  // Helper function to format screenshot URL
  const formatScreenshotUrl = (screenshot: string | any) => {
    // Handle both string URLs and screenshot objects
    const screenshotUrl = typeof screenshot === 'string' ? screenshot : screenshot.url || screenshot
    // Extract just the filename from the full path
    const filename = screenshotUrl.split('/').pop() || screenshotUrl
    // Use the new API route with query parameter
    return `/api/image?file=${filename}`
  }

  // Helper function to render a screenshot row
  const renderScreenshotRow = (screenshots: any[], title: string, icon: string, bgGradient: string) => {
    if (screenshots.length === 0) return null
    
    return (
      <div className="mb-6">
        <div className="flex items-center justify-between mb-3">
          <h5 className={`text-sm font-bold text-white flex items-center bg-gradient-to-r ${bgGradient} px-3 py-1 rounded-lg`}>
            <span className="mr-2">{icon}</span>
            {title}
          </h5>
          <div className="text-xs text-gray-400">
            {screenshots.length} screenshot{screenshots.length !== 1 ? 's' : ''}
          </div>
        </div>
        
        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-3">
          {screenshots.map((item, displayIndex) => {
            const imageUrl = formatScreenshotUrl(item.screenshot)
            
            return (
              <div 
                key={displayIndex}
                className="group relative bg-gray-800/30 rounded-lg overflow-hidden border border-gray-700 hover:border-purple-500/50 transition-all cursor-pointer transform hover:scale-[1.02]"
                onClick={() => onImageClick(imageUrl)}
              >
                {/* Preview Image */}
                <div className="aspect-video bg-gray-800 flex items-center justify-center relative">
                  <img
                    src={imageUrl}
                    alt={`${symbol} - ${item.timeframe} chart (${item.layout} Layout)`}
                    className="w-full h-full object-cover"
                    onError={(e: any) => {
                      const target = e.target as HTMLImageElement
                      target.style.display = 'none'
                      const fallback = target.nextElementSibling as HTMLElement
                      if (fallback) fallback.classList.remove('hidden')
                    }}
                  />
                  <div className="hidden absolute inset-0 flex items-center justify-center text-gray-400">
                    <div className="text-center">
                      <div className="text-3xl mb-2">📊</div>
                      <div className="text-sm">Chart Preview</div>
                      <div className="text-xs text-gray-500">{item.filename}</div>
                    </div>
                  </div>
                  
                  {/* Overlay */}
                  <div className="absolute inset-0 bg-black/0 group-hover:bg-black/20 transition-all flex items-center justify-center">
                    <div className="opacity-0 group-hover:opacity-100 transition-opacity">
                      <div className="w-12 h-12 bg-purple-500/80 rounded-full flex items-center justify-center">
                        <span className="text-white text-xl">🔍</span>
                      </div>
                    </div>
                  </div>
                </div>

                {/* Image Info */}
                <div className="p-3">
                  <div className="flex items-center justify-between">
                    <div>
                      <div className="text-sm font-medium text-white">{symbol}</div>
                      <div className="text-xs text-purple-300">{item.timeframe} Timeframe</div>
                    </div>
                    <div className="text-xs text-gray-400">
                      Click to view
                    </div>
                  </div>
                </div>
              </div>
            )
          })}
        </div>
      </div>
    )
  }

  return (
    <>
      {/* Gallery Grid */}
      <div className="mt-6 p-4 bg-gradient-to-br from-purple-500/10 to-indigo-500/10 border border-purple-500/30 rounded-lg">
        <div className="flex items-center justify-between mb-4">
          <h4 className="text-lg font-bold text-white flex items-center">
            <span className="w-6 h-6 bg-gradient-to-br from-purple-400 to-purple-600 rounded-lg flex items-center justify-center mr-2 text-sm">
              📸
            </span>
            Chart Screenshots
          </h4>
          <div className="text-xs text-gray-400">
            {screenshotData.length} captured • Click to enlarge
          </div>
        </div>

        {/* AI Layout Row */}
        {renderScreenshotRow(
          aiScreenshots, 
          'AI Layout - RSI, EMAs, MACD', 
          '🤖', 
          'from-blue-500/30 to-cyan-500/30'
        )}

        {/* DIY Layout Row */}
        {renderScreenshotRow(
          diyScreenshots, 
          'DIY Module Layout - Stochastic RSI, VWAP, OBV', 
          '🔧', 
          'from-orange-500/30 to-yellow-500/30'
        )}

        {/* Default Layout Row (if any) */}
        {renderScreenshotRow(
          defaultScreenshots, 
          'Default Layout', 
          '📊', 
          'from-purple-500/30 to-indigo-500/30'
        )}

        {/* No Screenshots Message */}
        {screenshotData.length === 0 && (
          <div className="text-center py-8 text-gray-400">
            <div className="text-3xl mb-2">📊</div>
            <div className="text-sm">No screenshots available</div>
          </div>
        )}
      </div>

      {/* Enlarged Image Modal */}
      {enlargedImage && (
        <div 
          className="fixed inset-0 bg-black/80 backdrop-blur-sm flex items-center justify-center p-4 z-50"
          onClick={onClose}
        >
          <div className="relative max-w-6xl max-h-[90vh] w-full" onClick={(e: any) => e.stopPropagation()}>
            {/* Close Button */}
            <button
              onClick={onClose}
              className="absolute top-4 right-4 w-10 h-10 bg-black/50 hover:bg-black/70 rounded-full flex items-center justify-center text-white z-10 transition-colors"
            >
              ✕
            </button>

            {/* Image */}
            <img
              src={enlargedImage}
              alt="Enlarged chart"
              className="w-full h-full object-contain rounded-lg border border-gray-600"
              onError={(e: any) => {
                console.error('Failed to load enlarged image:', enlargedImage)
                const target = e.target as HTMLImageElement
                target.alt = 'Failed to load image'
              }}
            />

            {/* Image Info Overlay */}
            <div className="absolute bottom-4 left-4 right-4 bg-black/70 backdrop-blur-sm rounded-lg p-4">
              <div className="flex items-center justify-between">
                <div>
                  <div className="text-white font-medium">{symbol} Chart Analysis</div>
                  <div className="text-gray-300 text-sm">AI analyzed screenshot • High resolution view</div>
                </div>
                <div className="text-xs text-gray-400">
                  ESC to close • Click outside to close
                </div>
              </div>
            </div>
          </div>
        </div>
      )}
    </>
  )
}
