import { SpecifyError, specifyErrors } from '../../../errors/index.js';
import { DeriveBuiltInParserHandlerFromDefinition } from '../../internals/createBuiltInParserDefinition.js';
import { GenerateBarrelFileParserDefinition } from './definition.js';
import { renderBarrelFile } from './internals/renderBarrelFile.js';

export const generateBarrelFileHandler: DeriveBuiltInParserHandlerFromDefinition<
  GenerateBarrelFileParserDefinition
> = async (_, toolbox, options, outputConfiguration) => {
  let barrelContent: string | null = null;

  toolbox.updateOutput(output => {
    switch (output.type) {
      case 'files': {
        barrelContent = renderBarrelFile(output.files, options ?? {});

        output.files.push({
          path: outputConfiguration.filePath,
          content: {
            type: 'text',
            text: barrelContent,
          },
        });

        break;
      }
      default: {
        throw new SpecifyError({
          errorKey: specifyErrors.PARSERS_ENGINE_INVALID_OUTPUT_TYPE.errorKey,
          publicMessage: `The output type ${output.type} is not supported by the generate-barrel-file parser.`,
        });
      }
    }

    return output;
  });

  return {
    type: 'JSON',
    json: {
      path: outputConfiguration.filePath,
      text: barrelContent,
    },
  };
};