// Copyright (c) 2023, 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.

/// List the packages in pkg/ as well information about their
/// analysis_options.yaml configuration.
library;

import 'dart:io';

void main(List<String> args) {
  const indent = 29;

  var dirs = Directory('pkg').listSync().whereType<Directory>().toList();
  dirs.sort((a, b) => a.path.compareTo(b.path));

  for (var dir in dirs) {
    var pubspec = File('${dir.path}/pubspec.yaml');
    if (!pubspec.existsSync()) continue;

    var sloc = _calcLines(dir) / 1024.0;
    var slocDesc = '(${sloc.toStringAsFixed(1).padLeft(6)}k lines)';
    var options = File('${dir.path}/analysis_options.yaml');
    var name = dir.path.split('/').last;

    var type = 'default';
    if (options.existsSync()) {
      type = '** custom **';
      var optionsContent = options.readAsStringSync();
      if (optionsContent.contains('package:lints/core.yaml')) {
        type = 'core';
      } else if (optionsContent.contains('package:lints/recommended.yaml')) {
        type = 'recommended';
      } else if (optionsContent
          .contains('package:dart_flutter_team_lints/analysis_options.yaml')) {
        type = 'dart_flutter_team_lints';
      }
    }
    print('${name.padRight(indent)}: ${type.padRight(23)} $slocDesc');
  }
}

int _calcLines(Directory dir) {
  var result = 0;

  for (var entity in dir.listSync()) {
    if (entity.name.startsWith('.')) continue;

    if (entity is Directory) {
      result += _calcLines(entity);
    } else {
      if (entity is File && entity.name.endsWith('.dart')) {
        result += entity
            .readAsLinesSync()
            .where((line) => line.trim().isNotEmpty)
            .length;
      }
    }
  }

  return result;
}

extension FileSystemEntityExtension on FileSystemEntity {
  String get name => path.split('/').last;
}