// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:async';

import 'package:path/path.dart' as p;

import '../command.dart';
import '../executable.dart';
import '../log.dart' as log;
import '../utils.dart';

/// Handles the `run` pub command.
class RunCommand extends PubCommand {
  @override
  String get name => 'run';
  @override
  String get description => 'Run an executable from a package.';
  @override
  String get argumentsDescription => '<executable> [arguments...]';
  @override
  String get docUrl => 'https://dart.dev/tools/pub/cmd/pub-run';
  @override
  bool get allowTrailingOptions => false;
  @override
  bool get hidden => deprecated;

  final bool deprecated;
  final bool alwaysUseSubprocess;

  RunCommand({
    this.deprecated = false,
    this.alwaysUseSubprocess = false,
  }) {
    argParser.addFlag('enable-asserts', help: 'Enable assert statements.');
    argParser.addFlag('checked', abbr: 'c', hide: true);
    argParser.addMultiOption(
      'enable-experiment',
      help: 'Runs the executable in a VM with the given experiments enabled.\n'
          '(Will disable snapshotting, resulting in slower startup).',
      valueHelp: 'experiment',
    );
    argParser.addFlag(
      'sound-null-safety',
      help: 'Override the default null safety execution mode.',
      hide: true,
    );
    argParser.addOption('mode', help: 'Deprecated option', hide: true);
    argParser.addOption(
      'directory',
      abbr: 'C',
      help: 'Run this in the directory<dir>.',
      valueHelp: 'dir',
    );
  }

  @override
  Future<void> runProtected() async {
    if (deprecated) {
      await log.errorsOnlyUnlessTerminal(() {
        log.message('Deprecated. Use `dart run` instead.');
      });
    }
    if (argResults.rest.isEmpty) {
      usageException('Must specify an executable to run.');
    }
    if (argResults.wasParsed('sound-null-safety')) {
      dataError('The --(no-)sound-null-safety flag is no longer supported.');
    }

    var package = entrypoint.root.name;
    var executable = argResults.rest[0];
    var args = argResults.rest.skip(1).toList();

    // A command like "foo:bar" runs the "bar" script from the "foo" package.
    // If there is no colon prefix, default to the root package.
    if (executable.contains(':')) {
      var components = split1(executable, ':');
      package = components[0];
      executable = components[1];

      if (p.split(executable).length > 1) {
        usageException(
          'Cannot run an executable in a subdirectory of a dependency.',
        );
      }
    } else if (onlyIdentifierRegExp.hasMatch(executable)) {
      // "pub run foo" means the same thing as "pub run foo:foo" as long as
      // "foo" is a valid Dart identifier (and thus package name).
      package = executable;
    }

    if (argResults.wasParsed('mode')) {
      log.warning('The --mode flag is deprecated and has no effect.');
    }

    final vmArgs = vmArgsFromArgResults(argResults);

    var exitCode = await runExecutable(
      entrypoint,
      Executable.adaptProgramName(package, executable),
      args,
      enableAsserts: argResults['enable-asserts'] || argResults['checked'],
      recompile: (executable) => log.errorsOnlyUnlessTerminal(
        () => entrypoint.precompileExecutable(executable),
      ),
      vmArgs: vmArgs,
      alwaysUseSubprocess: alwaysUseSubprocess,
    );
    overrideExitCode(exitCode);
  }
}