import * as ImageManipulator from 'expo-image-manipulator';

/**
 * Optimize image for avatar upload
 * - Resize to max 400x400
 * - Compress to JPEG with 80% quality
 * - Returns optimized URI
 */
export async function optimizeAvatarImage(uri: string): Promise<string> {
  try {
    const result = await ImageManipulator.manipulateAsync(
      uri,
      [
        { resize: { width: 400, height: 400 } },
      ],
      {
        compress: 0.8,
        format: ImageManipulator.SaveFormat.JPEG,
      }
    );

    return result.uri;
  } catch (error) {
    // Return original if optimization fails
    return uri;
  }
}

/**
 * Optimize image for general upload with custom size
 */
export async function optimizeImage(
  uri: string,
  maxSize: number = 800,
  quality: number = 0.8
): Promise<string> {
  try {
    const result = await ImageManipulator.manipulateAsync(
      uri,
      [
        { resize: { width: maxSize, height: maxSize } },
      ],
      {
        compress: quality,
        format: ImageManipulator.SaveFormat.JPEG,
      }
    );

    return result.uri;
  } catch (error) {
    return uri;
  }
}

/**
 * Add cache-busting query parameter to image URL
 * Prevents browsers and React Native Image from caching old versions
 *
 * @param uri - Image URI (can be http, https, or file://)
 * @param timestamp - Optional timestamp (defaults to current time)
 * @returns URI with cache-busting parameter
 */
export function bustImageCache(uri: string | null | undefined, timestamp?: number): string | null {
  if (!uri || uri.trim() === '') {
    return null;
  }

  // Don't add cache buster to local file URIs (file://)
  if (uri.startsWith('file://')) {
    return uri;
  }

  // Don't add cache buster to data URIs
  if (uri.startsWith('data:')) {
    return uri;
  }

  // Don't add cache buster to placeholder images
  if (uri.includes('placeholder')) {
    return uri;
  }

  const cacheBuster = timestamp || Date.now();
  const separator = uri.includes('?') ? '&' : '?';
  return `${uri}${separator}t=${cacheBuster}`;
}