// 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.

library dart2js.test.message_kind_helper;

import 'package:expect/expect.dart';
import 'dart:async';

import '../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart' show
    Compiler,
    MessageKind;

import 'memory_compiler.dart';

const String ESCAPE_REGEXP = r'[[\]{}()*+?.\\^$|]';

Future<Compiler> check(MessageKind kind, Compiler cachedCompiler) {
  Expect.isNotNull(kind.howToFix);
  Expect.isFalse(kind.examples.isEmpty);

  return Future.forEach(kind.examples, (example) {
    if (example is String) {
      example = {'main.dart': example};
    } else {
      Expect.isTrue(example is Map,
                    "Example must be either a String or a Map.");
      Expect.isTrue(example.containsKey('main.dart'),
                    "Example map must contain a 'main.dart' entry.");
    }
    List<String> messages = <String>[];
    void collect(Uri uri, int begin, int end, String message, kind) {
      if (kind.name == 'verbose info') {
        return;
      }
      messages.add(message);
    }

    Compiler compiler = compilerFor(
        example,
        diagnosticHandler: collect,
        options: ['--analyze-only'],
        cachedCompiler: cachedCompiler);

    return compiler.run(Uri.parse('memory:main.dart')).then((_) {

      Expect.isFalse(messages.isEmpty, 'No messages in """$example"""');

      String expectedText = !kind.hasHowToFix
          ? kind.template : '${kind.template}\n${kind.howToFix}';
      String pattern = expectedText.replaceAllMapped(
          new RegExp(ESCAPE_REGEXP), (m) => '\\${m[0]}');
      pattern = pattern.replaceAll(new RegExp(r'#\\\{[^}]*\\\}'), '.*');

      // TODO(johnniwinther): Extend MessageKind to contain information on
      // where info messages are expected.
      bool messageFound = false;
      for (String message in messages) {
        if (new RegExp('^$pattern\$').hasMatch(message)) {
          messageFound = true;
        }
      }
      Expect.isTrue(messageFound, '"$pattern" does not match any in $messages');
      Expect.isFalse(compiler.hasCrashed);
      cachedCompiler = compiler;
    });
  }).then((_) => cachedCompiler);
}