// Copyright (c) 2018, 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' show File, Platform;

import 'package:analysis_server_client/protocol.dart';
import 'package:path/path.dart' as path;

/// Read pubspec.yaml and return the version in that file.
String get pubspecVersion {
  String dir = path.dirname(Platform.script.toFilePath());
  File pubspec = new File(path.join(dir, '..', 'pubspec.yaml'));

  List<String> lines = pubspec.readAsLinesSync();
  if (lines[0] != 'name: dartfix') {
    throw 'Expected dartfix pubspec in: ${pubspec.path}';
  }
  String version;
  if (lines[1].startsWith('version:')) {
    version = lines[1].substring(8).trim();
  }
  if (version == null || version.isEmpty) {
    throw 'Failed to find dartfix pubspec version in ${pubspec.path}';
  }
  return version;
}

int compareSuggestions(DartFixSuggestion s1, DartFixSuggestion s2) {
  int result = s1.description.compareTo(s2.description);
  if (result != 0) {
    return result;
  }
  return (s2.location?.offset ?? 0) - (s1.location?.offset ?? 0);
}

/// Return the analysis_server executable by proceeding upward
/// until finding the Dart SDK repository root then returning
/// the analysis_server executable within the repository.
/// Return `null` if it cannot be found.
String findServerPath() {
  String pathname = Platform.script.toFilePath();
  while (true) {
    String parent = path.dirname(pathname);
    if (parent.length >= pathname.length) {
      return null;
    }
    String serverPath =
        path.join(parent, 'pkg', 'analysis_server', 'bin', 'server.dart');
    if (new File(serverPath).existsSync()) {
      return serverPath;
    }
    pathname = parent;
  }
}

bool shouldShowError(AnalysisError error) {
  // Only show diagnostics that will affect the fixes.
  return error.type.name != 'HINT' &&
      error.type.name != 'LINT' &&
      error.type.name != 'TODO' &&
      // TODO(danrubel): Rather than checking the error.code with
      // specific strings, add something to the error indicating that
      // it will be automatically fixed by edit.dartfix.
      error.code != 'wrong_number_of_type_arguments_constructor';
}

String toSentenceFragment(String message) {
  return message.endsWith('.')
      ? message.substring(0, message.length - 1)
      : message;
}