import { useState } from 'react';

export default function UploadImageModal({ isOpen, onClose, onUpload, currentImage }) {
  const [uploadMethod, setUploadMethod] = useState('url'); // 'url' or 'file'
  const [imageUrl, setImageUrl] = useState(currentImage || '');
  const [dragActive, setDragActive] = useState(false);
  const [uploading, setUploading] = useState(false);

  const handleSubmit = async (e) => {
    e.preventDefault();
    if (!imageUrl.trim()) return;
    
    setUploading(true);
    try {
      await onUpload(imageUrl);
      onClose();
    } catch (error) {
      console.error('Upload failed:', error);
    } finally {
      setUploading(false);
    }
  };

  const handleDrag = (e) => {
    e.preventDefault();
    e.stopPropagation();
    if (e.type === "dragenter" || e.type === "dragover") {
      setDragActive(true);
    } else if (e.type === "dragleave") {
      setDragActive(false);
    }
  };

  const handleDrop = (e) => {
    e.preventDefault();
    e.stopPropagation();
    setDragActive(false);
    
    if (e.dataTransfer.files && e.dataTransfer.files[0]) {
      handleFileUpload(e.dataTransfer.files[0]);
    }
  };

  const handleFileUpload = (file) => {
    if (file.type.startsWith('image/')) {
      const reader = new FileReader();
      reader.onload = (e) => {
        setImageUrl(e.target.result);
        setUploadMethod('file');
      };
      reader.readAsDataURL(file);
    }
  };

  const handleFileInput = (e) => {
    if (e.target.files && e.target.files[0]) {
      handleFileUpload(e.target.files[0]);
    }
  };

  if (!isOpen) return null;

  return (
    <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50 p-4">
      <div className="bg-white rounded-xl shadow-xl max-w-md w-full max-h-[90vh] overflow-y-auto">
        <div className="p-6">
          <div className="flex items-center justify-between mb-6">
            <h2 className="text-xl font-bold text-gray-900">Upload Hero Image</h2>
            <button
              onClick={onClose}
              className="text-gray-400 hover:text-gray-600 transition-colors"
            >
              <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
              </svg>
            </button>
          </div>

          <form onSubmit={handleSubmit}>
            {/* Upload Method Tabs */}
            <div className="flex space-x-1 mb-6 bg-gray-100 rounded-lg p-1">
              <button
                type="button"
                onClick={() => setUploadMethod('url')}
                className={`flex-1 py-2 px-3 rounded-md text-sm font-medium transition-colors ${
                  uploadMethod === 'url'
                    ? 'bg-white text-gray-900 shadow-sm'
                    : 'text-gray-600 hover:text-gray-900'
                }`}
              >
                Image URL
              </button>
              <button
                type="button"
                onClick={() => setUploadMethod('file')}
                className={`flex-1 py-2 px-3 rounded-md text-sm font-medium transition-colors ${
                  uploadMethod === 'file'
                    ? 'bg-white text-gray-900 shadow-sm'
                    : 'text-gray-600 hover:text-gray-900'
                }`}
              >
                Upload File
              </button>
            </div>

            {uploadMethod === 'url' ? (
              <div className="mb-6">
                <label className="block text-sm font-medium text-gray-700 mb-2">
                  Image URL
                </label>
                <input
                  type="url"
                  value={imageUrl}
                  onChange={(e) => setImageUrl(e.target.value)}
                  placeholder="https://example.com/image.jpg"
                  className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:border-transparent"
                />
              </div>
            ) : (
              <div className="mb-6">
                <label className="block text-sm font-medium text-gray-700 mb-2">
                  Upload Image
                </label>
                <div
                  className={`border-2 border-dashed rounded-lg p-6 text-center transition-colors ${
                    dragActive
                      ? 'border-purple-500 bg-purple-50'
                      : 'border-gray-300 hover:border-gray-400'
                  }`}
                  onDragEnter={handleDrag}
                  onDragLeave={handleDrag}
                  onDragOver={handleDrag}
                  onDrop={handleDrop}
                >
                  <svg className="w-12 h-12 text-gray-400 mx-auto mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M15 13l-3-3m0 0l-3 3m3-3v12" />
                  </svg>
                  <p className="text-gray-600 mb-2">Drag and drop an image here, or</p>
                  <label className="inline-block px-4 py-2 bg-purple-600 text-white rounded-lg hover:bg-purple-700 cursor-pointer transition-colors">
                    Choose File
                    <input
                      type="file"
                      accept="image/*"
                      onChange={handleFileInput}
                      className="hidden"
                    />
                  </label>
                  <p className="text-xs text-gray-500 mt-2">PNG, JPG, GIF up to 10MB</p>
                </div>
              </div>
            )}

            {/* Preview */}
            {imageUrl && (
              <div className="mb-6">
                <label className="block text-sm font-medium text-gray-700 mb-2">
                  Preview
                </label>
                <div className="relative rounded-lg overflow-hidden bg-gray-100">
                  <img
                    src={imageUrl}
                    alt="Preview"
                    className="w-full h-32 object-cover"
                    onError={(e) => {
                      e.target.src = 'https://via.placeholder.com/400x128/f3f4f6/6b7280?text=Invalid+Image';
                    }}
                  />
                </div>
              </div>
            )}

            {/* Actions */}
            <div className="flex space-x-3">
              <button
                type="button"
                onClick={onClose}
                className="flex-1 py-2 px-4 border border-gray-300 rounded-lg text-gray-700 hover:bg-gray-50 transition-colors"
              >
                Cancel
              </button>
              <button
                type="submit"
                disabled={!imageUrl.trim() || uploading}
                className={`flex-1 py-2 px-4 rounded-lg font-medium transition-colors ${
                  !imageUrl.trim() || uploading
                    ? 'bg-gray-300 text-gray-500 cursor-not-allowed'
                    : 'bg-purple-600 text-white hover:bg-purple-700'
                }`}
              >
                {uploading ? 'Uploading...' : 'Upload Image'}
              </button>
            </div>
          </form>
        </div>
      </div>
    </div>
  );
}