import React, { useEffect, useState } from 'react';
import { X, ZoomIn, ZoomOut, Download } from 'lucide-react';

interface ImagePreviewModalProps {
  isOpen: boolean;
  onClose: () => void;
  src: string;
  alt?: string;
}

export default function ImagePreviewModal({ isOpen, onClose, src, alt }: ImagePreviewModalProps) {
  const [scale, setScale] = useState(1);
  const [isDragging, setIsDragging] = useState(false);
  const [position, setPosition] = useState({ x: 0, y: 0 });
  const [startPos, setStartPos] = useState({ x: 0, y: 0 });

  // Reset state when modal opens
  useEffect(() => {
    if (isOpen) {
      document.body.style.overflow = 'hidden';
    } else {
      document.body.style.overflow = 'unset';
    }
    return () => {
      document.body.style.overflow = 'unset';
    };
  }, [isOpen]);

  const handleZoomIn = (e: React.MouseEvent) => {
    e.stopPropagation();
    setScale(prev => Math.min(prev + 0.5, 4));
  };

  const handleZoomOut = (e: React.MouseEvent) => {
    e.stopPropagation();
    setScale(prev => Math.max(prev - 0.5, 1));
    if (scale <= 1.5) {
      setPosition({ x: 0, y: 0 }); // Reset position if zoomed out
    }
  };

  const handleDownload = (e: React.MouseEvent) => {
    e.stopPropagation();
    const link = document.createElement('a');
    link.href = src;
    link.download = alt || 'image-download';
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  };

  // Mouse event handlers for dragging
  const handleMouseDown = (e: React.MouseEvent) => {
    if (scale > 1) {
      setIsDragging(true);
      setStartPos({ x: e.clientX - position.x, y: e.clientY - position.y });
    }
  };

  const handleMouseMove = (e: React.MouseEvent) => {
    if (isDragging && scale > 1) {
      setPosition({
        x: e.clientX - startPos.x,
        y: e.clientY - startPos.y
      });
    }
  };

  const handleMouseUp = () => {
    setIsDragging(false);
  };

  if (!isOpen) return null;

  return (
    <div 
      className="fixed inset-0 z-[200] flex items-center justify-center bg-black/80 backdrop-blur-sm animate-in fade-in duration-200"
      onClick={onClose}
    >
      {/* Toolbar */}
      <div className="absolute top-4 right-4 flex items-center gap-2 z-10" onClick={e => e.stopPropagation()}>
        <button 
          onClick={handleZoomIn}
          className="p-2 text-white/70 hover:text-white bg-black/50 hover:bg-black/70 rounded-full transition-colors"
          title="Zoom In"
        >
          <ZoomIn size={20} />
        </button>
        <button 
          onClick={handleZoomOut}
          className="p-2 text-white/70 hover:text-white bg-black/50 hover:bg-black/70 rounded-full transition-colors"
          title="Zoom Out"
        >
          <ZoomOut size={20} />
        </button>
        <button 
          onClick={handleDownload}
          className="p-2 text-white/70 hover:text-white bg-black/50 hover:bg-black/70 rounded-full transition-colors"
          title="Download"
        >
          <Download size={20} />
        </button>
        <button 
          onClick={onClose}
          className="p-2 text-white/70 hover:text-white bg-black/50 hover:bg-black/70 rounded-full transition-colors ml-2"
          title="Close"
        >
          <X size={24} />
        </button>
      </div>

      {/* Image Container */}
      <div 
        className="relative w-full h-full flex items-center justify-center p-4 overflow-hidden"
        onMouseMove={handleMouseMove}
        onMouseUp={handleMouseUp}
        onMouseLeave={handleMouseUp}
      >
        <img 
          src={src} 
          alt={alt || 'Preview'} 
          className={`max-w-full max-h-full object-contain transition-transform duration-200 ${isDragging ? 'cursor-grabbing' : scale > 1 ? 'cursor-grab' : 'cursor-default'}`}
          style={{ 
            transform: `scale(${scale}) translate(${position.x / scale}px, ${position.y / scale}px)`,
          }}
          onClick={(e) => e.stopPropagation()}
          onMouseDown={handleMouseDown}
          draggable={false}
        />
      </div>
    </div>
  );
}