/**
 * Generates an imgproxy URL for a given source image and options.
 *
 * Documentation: https://docs.imgproxy.net/usage/processing
 */

interface ImgproxyOptions {
  width?: number;
  height?: number;
  resizing_type?: 'fit' | 'fill' | 'fill-down' | 'force' | 'auto';
  gravity?: string;
  enlarge?: boolean;
  extension?: string;
}

export function getImgproxyUrl(src: string, options: ImgproxyOptions = {}): string {
  // Use local proxy path which is rewritten in next.config.mjs
  const baseUrl = '/_img';

  // Handle local paths or relative URLs
  let absoluteSrc = src;
  if (src.startsWith('/')) {
    const baseUrlForSrc =
      process.env.NEXT_PUBLIC_BASE_URL ||
      (typeof window !== 'undefined' ? window.location.origin : 'https://klz-cables.com');
    if (baseUrlForSrc) {
      absoluteSrc = `${baseUrlForSrc.replace(/\/$/, '')}${src}`;
    }
  }

  // Development mapping: Map local domains to internal Docker hostnames
  // so imgproxy can fetch images without SSL issues or external routing
  if (process.env.NODE_ENV === 'development') {
    if (absoluteSrc.includes('klz.localhost')) {
      absoluteSrc = absoluteSrc.replace(/^https?:\/\/klz\.localhost/, 'http://klz-app:3000');
    } else if (absoluteSrc.includes('cms.klz.localhost')) {
      absoluteSrc = absoluteSrc.replace(/^https?:\/\/cms\.klz\.localhost/, 'http://klz-cms:8055');
    }
    // Also handle direct container names if needed
  }

  const { width = 0, height = 0, enlarge = false, extension = '' } = options;

  let quality = 80;
  if (extension) quality = 90;

  // Re-map imgproxy URL to our new parameter structure
  // e.g. /process?url=...&w=...&h=...&q=...&format=...
  const queryParams = new URLSearchParams({
    url: absoluteSrc,
  });

  if (width > 0) queryParams.set('w', width.toString());
  if (height > 0) queryParams.set('h', height.toString());
  if (extension) queryParams.set('format', extension.replace('.', ''));
  if (quality) queryParams.set('q', quality.toString());

  return `${baseUrl}/process?${queryParams.toString()}`;
}