// Copyright (c) 2013, 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:io';

import 'package:args/args.dart';
import 'package:logging/logging.dart';

import '../lib/docgen.dart';

/**
 * Analyzes Dart files and generates a representation of included libraries, 
 * classes, and members. 
 */
void main() {
  logger.onRecord.listen((record) => print(record.message));
  var results = _initArgParser().parse(new Options().arguments);
  
  docgen(results.rest, 
      packageRoot: results['package-root'], 
      outputToYaml: !results['json'],  
      includePrivate: results['include-private'], 
      includeSdk: results['parse-sdk'] || results['include-sdk'], 
      parseSdk: results['parse-sdk'],
      append: results['append'] && new Directory('docs').existsSync(),
      introduction: results['parse-sdk'] ? 
          'sdk-introduction.md' : results['introduction']);
}

/**
 * Creates parser for docgen command line arguments. 
 */
ArgParser _initArgParser() {
  var parser = new ArgParser();
  parser.addFlag('help', abbr: 'h', 
      help: 'Prints help and usage information.', 
      negatable: false, 
      callback: (help) {
        if (help) {
          logger.info(parser.getUsage());
          logger.info(USAGE);
          exit(0);
        }
      });
  parser.addFlag('verbose', abbr: 'v', 
      help: 'Output more logging information.', negatable: false, 
      callback: (verbose) {
        if (verbose) Logger.root.level = Level.FINEST;
      });
  parser.addFlag('json', abbr: 'j', 
      help: 'Outputs to JSON. Files are outputted to YAML by default. ' 
        'If --append is used, it takes the file-format of the previous '
        'run stated in library_list.json ignoring the flag.', 
      negatable: true);
  parser.addFlag('include-private', 
      help: 'Flag to include private declarations.', negatable: false);
  parser.addFlag('include-sdk', 
      help: 'Flag to parse SDK Library files.', negatable: false);
  parser.addFlag('parse-sdk', 
      help: 'Parses the SDK libraries only.', 
      defaultsTo: false, negatable: false);
  parser.addOption('package-root', 
      help: 'Sets the package root of the library being analyzed.');
  parser.addFlag('append', 
      help: 'Append to the docs folder, library_list.json and index.txt', 
      defaultsTo: false, negatable: false);
  parser.addOption('introduction', 
      help: 'Adds the provided markdown text file as the introduction' 
        ' for the outputted documentation.', defaultsTo: '');
  
  return parser;
}