import React, { useRef, useState } from 'react';
import { useTranslation } from '@/hooks/useI18n.tsx';
import { Trash2, UploadCloud } from 'lucide-react';
import Button from '@/components/ui/Button.tsx';
import Spinner from '@/components/ui/Spinner.tsx';

interface ImageUploadProps {
  value: string | null | undefined;
  onChange: (value: string | null) => void;
  className?: string;
}

const fileToDataUrl = (file: File): Promise<string> => {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = () => resolve(reader.result as string);
    reader.onerror = reject;
    reader.readAsDataURL(file);
  });
};

const ImageUpload: React.FC<ImageUploadProps> = ({ value, onChange, className }) => {
  const { t } = useTranslation();
  const fileInputRef = useRef<HTMLInputElement>(null);
  const [isLoading, setIsLoading] = useState(false);

  const handleFileChange = async (event: React.ChangeEvent<HTMLInputElement>) => {
    const file = event.target.files?.[0];
    if (file) {
      setIsLoading(true);
      try {
        const dataUrl = await fileToDataUrl(file);
        onChange(dataUrl);
      } catch (error) {
        console.error('Error converting file to data URL', error);
        onChange(null);
      } finally {
        setIsLoading(false);
      }
    }
  };

  const handleRemoveImage = () => {
    onChange(null);
    if (fileInputRef.current) {
      fileInputRef.current.value = ''; // Reset file input
    }
  };

  return (
    <div className={className}>
      <div
        className="w-full aspect-[4/3] rounded-lg border-2 border-dashed flex items-center justify-center bg-muted/50 relative overflow-hidden cursor-pointer"
        onClick={() => !isLoading && fileInputRef.current?.click()}
      >
        {isLoading ? (
          <Spinner className="h-8 w-8 text-primary" />
        ) : value ? (
          <img
            src={value}
            alt={t('imageUpload.logoAlt')}
            className="max-h-full max-w-full object-contain"
            loading="eager"
            decoding="sync"
            onError={(e) => {
              (e.target as HTMLImageElement).style.display = 'none';
            }}
          />
        ) : (
          <div className="text-center text-muted-foreground p-4">
            <UploadCloud className="h-10 h-4 mb-2 mx-auto text-current w-10 w-4" />
            <p className="font-medium">{t('imageUpload.dropzoneHint')}</p>
          </div>
        )}
      </div>

      <input
        type="file"
        id="image-upload-input"
        name="image-upload-input"
        ref={fileInputRef}
        onChange={handleFileChange}
        className="hidden"
        accept="image/png, image/jpeg, image/svg+xml"
        disabled={isLoading}
      />

      <div className="flex items-center gap-2 mt-2">
        <Button
          type="button"
          variant="outline"
          className="w-full"
          onClick={() => fileInputRef.current?.click()}
          disabled={isLoading}
        >
          <UploadCloud className="h-4 mr-2 text-current w-4" />
          {value ? t('imageUpload.change') : t('imageUpload.upload')}
        </Button>
        {value && (
          <Button
            type="button"
            variant="ghost"
            size="sm"
            className="text-destructive hover:text-destructive hover:bg-destructive/10 p-2 h-auto shrink-0"
            onClick={handleRemoveImage}
            aria-label={t('imageUpload.remove')}
            disabled={isLoading}
          >
            <Trash2 className="h-4 text-current w-4" />
          </Button>
        )}
      </div>
    </div>
  );
};

export default ImageUpload;