import type {BuildProgressEvent} from '@atlaspack/types-internal';

import path from 'path';

export function getProgressMessage(
  event: BuildProgressEvent,
): string | null | undefined {
  switch (event.phase) {
    case 'transforming':
      return `Building ${path.basename(event.filePath)}...`;

    case 'building': {
      let completeStr = event.completeAssets.toString();
      let totalStr = event.totalAssets.toString();
      let displayComplete = completeStr.padStart(totalStr.length, ' ');
      return `Building ${displayComplete}/${totalStr}...`;
    }

    case 'bundling':
      return 'Bundling...';

    case 'packaging':
      return `Packaging ${event.bundle.displayName}...`;

    case 'optimizing':
      return `Optimizing ${event.bundle.displayName}...`;

    case 'packagingAndOptimizing': {
      return getPackageProgressMessage(
        event.completeBundles,
        event.totalBundles,
      );
    }
  }

  return null;
}

export function getPackageProgressMessage(
  completeBundles: number,
  totalBundles: number,
): string {
  let percent = Math.floor((completeBundles / totalBundles) * 100);
  let completeStr = completeBundles.toString();
  let totalStr = totalBundles.toString();

  let displayBundles = completeStr.padStart(totalStr.length, ' ');

  return `Packaging bundles ${displayBundles}/${totalBundles} (${percent}%)`;
}