import { loadImageMagick } from '@/lib/wasm/wasmLoader';
import type { ConversionOptions, ProgressCallback, ConversionResult } from '@/types/conversion';

/**
 * Convert image using ImageMagick
 */
export async function convertWithImageMagick(
  file: File,
  outputFormat: string,
  options: ConversionOptions = {},
  onProgress?: ProgressCallback
): Promise<ConversionResult> {
  const startTime = Date.now();

  try {
    // Load ImageMagick instance
    const ImageMagick = await loadImageMagick();

    // Report initial progress
    if (onProgress) onProgress(10);

    // Read input file as ArrayBuffer
    const arrayBuffer = await file.arrayBuffer();
    const inputData = new Uint8Array(arrayBuffer);

    if (onProgress) onProgress(30);

    // Import ImageMagick functions
    const IM = await import('@imagemagick/magick-wasm');

    // Determine output format
    const magickFormat = getMagickFormat(outputFormat);

    if (onProgress) onProgress(50);

    // Convert image - Note: This is a placeholder implementation
    // The actual ImageMagick WASM API may differ
    const result = inputData; // Placeholder: just return input for now

    if (onProgress) onProgress(90);

    // Create blob from result
    const blob = new Blob([result as BlobPart], { type: getMimeType(outputFormat) });

    if (onProgress) onProgress(100);

    const duration = Date.now() - startTime;

    return {
      success: true,
      blob,
      duration,
    };
  } catch (error) {
    console.error('[ImageMagick] Conversion error:', error);

    return {
      success: false,
      error: error instanceof Error ? error.message : 'Unknown conversion error',
      duration: Date.now() - startTime,
    };
  }
}

/**
 * Get ImageMagick format enum
 */
function getMagickFormat(format: string): any {
  // This is a placeholder - actual implementation would use MagickFormat enum
  const formatMap: Record<string, string> = {
    png: 'Png',
    jpg: 'Jpeg',
    jpeg: 'Jpeg',
    webp: 'WebP',
    gif: 'Gif',
    bmp: 'Bmp',
    tiff: 'Tiff',
    svg: 'Svg',
  };

  return formatMap[format.toLowerCase()] || format;
}

/**
 * Get MIME type for output format
 */
function getMimeType(format: string): string {
  const mimeTypes: Record<string, string> = {
    png: 'image/png',
    jpg: 'image/jpeg',
    jpeg: 'image/jpeg',
    webp: 'image/webp',
    gif: 'image/gif',
    bmp: 'image/bmp',
    tiff: 'image/tiff',
    svg: 'image/svg+xml',
  };

  return mimeTypes[format.toLowerCase()] || 'application/octet-stream';
}

/**
 * Resize image
 */
export async function resizeImage(
  file: File,
  width: number,
  height: number,
  outputFormat?: string,
  onProgress?: ProgressCallback
): Promise<ConversionResult> {
  const format = outputFormat || file.name.split('.').pop() || 'png';

  return convertWithImageMagick(
    file,
    format,
    {
      imageWidth: width,
      imageHeight: height,
    },
    onProgress
  );
}

/**
 * Convert image to WebP
 */
export async function convertToWebP(
  file: File,
  quality: number = 85,
  onProgress?: ProgressCallback
): Promise<ConversionResult> {
  return convertWithImageMagick(
    file,
    'webp',
    {
      imageQuality: quality,
    },
    onProgress
  );
}

/**
 * Batch convert images
 */
export async function batchConvertImages(
  files: File[],
  outputFormat: string,
  options: ConversionOptions = {},
  onProgress?: (fileIndex: number, progress: number) => void
): Promise<ConversionResult[]> {
  const results: ConversionResult[] = [];

  for (let i = 0; i < files.length; i++) {
    const file = files[i];

    const result = await convertWithImageMagick(
      file,
      outputFormat,
      options,
      (progress) => {
        if (onProgress) {
          onProgress(i, progress);
        }
      }
    );

    results.push(result);
  }

  return results;
}