import 'dart:io';

import '../command.dart';
import '../local_state.dart' show joinPath;
import '_shared.dart';

Future<CommandResult> run(CommandContext context, List<String> args) async {
  final rawArgs = args.join(' ').trim();

  if (commonHelpArgs.contains(rawArgs.toLowerCase())) {
    context.writeLine('Usage: /lint\n\nRun the project linter.');
    return const CommandResult();
  }

  final pubspecFile = File(joinPath(context.workingDirectory, 'pubspec.yaml'));
  final packageJsonFile = File(joinPath(context.workingDirectory, 'package.json'));

  List<String> lintCmd;
  String label;

  if (await pubspecFile.exists()) {
    lintCmd = ['dart', 'analyze'];
    label = 'dart analyze';
  } else if (await packageJsonFile.exists()) {
    lintCmd = ['npm', 'run', 'lint'];
    label = 'npm run lint';
  } else {
    context.writeLine('Could not detect project type. No pubspec.yaml or package.json found.');
    context.writeLine('Run your linter manually.');
    return const CommandResult(exitCode: 1);
  }

  context.writeLine('Running: $label');
  context.writeLine('');

  try {
    final result = await Process.run(
      lintCmd.first,
      lintCmd.sublist(1),
      workingDirectory: context.workingDirectory,
    );

    final out = (result.stdout as String).trim();
    final err = (result.stderr as String).trim();

    if (out.isNotEmpty) context.writeLine(out);
    if (err.isNotEmpty) context.writeError(err);

    if (result.exitCode == 0) {
      context.writeLine('');
      context.writeLine('No issues found.');
    }

    return CommandResult(exitCode: result.exitCode);
  } on ProcessException catch (e) {
    context.writeError('Could not run $label: ${e.message}');
    return const CommandResult(exitCode: 1);
  }
}