/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.dev/license
 */
import {
  absoluteFrom,
  AbsoluteFsPath,
  FileSystem,
  PathSegment,
} from '@angular/compiler-cli/private/localize';

import {Diagnostics} from '../../diagnostics';
import {OutputPathFn} from '../output_path';
import {TranslationBundle, TranslationHandler} from '../translator';

/**
 * Translate an asset file by simply copying it to the appropriate translation output paths.
 */
export class AssetTranslationHandler implements TranslationHandler {
  constructor(private fs: FileSystem) {}

  canTranslate(_relativeFilePath: PathSegment | AbsoluteFsPath, _contents: Uint8Array): boolean {
    return true;
  }

  translate(
    diagnostics: Diagnostics,
    _sourceRoot: AbsoluteFsPath,
    relativeFilePath: PathSegment | AbsoluteFsPath,
    contents: Uint8Array,
    outputPathFn: OutputPathFn,
    translations: TranslationBundle[],
    sourceLocale?: string,
  ): void {
    for (const translation of translations) {
      this.writeAssetFile(
        diagnostics,
        outputPathFn,
        translation.locale,
        relativeFilePath,
        contents,
      );
    }
    if (sourceLocale !== undefined) {
      this.writeAssetFile(diagnostics, outputPathFn, sourceLocale, relativeFilePath, contents);
    }
  }

  private writeAssetFile(
    diagnostics: Diagnostics,
    outputPathFn: OutputPathFn,
    locale: string,
    relativeFilePath: PathSegment | AbsoluteFsPath,
    contents: Uint8Array,
  ): void {
    try {
      const outputPath = absoluteFrom(outputPathFn(locale, relativeFilePath));
      this.fs.ensureDir(this.fs.dirname(outputPath));
      this.fs.writeFile(outputPath, contents);
    } catch (e) {
      diagnostics.error((e as Error).message);
    }
  }
}
