// Copyright (c) 2017, 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:analysis_server/src/plugin/plugin_locator.dart';
import 'package:analysis_server/src/plugin/plugin_manager.dart';
import 'package:analysis_server/src/plugin/plugin_watcher.dart';
import 'package:analyzer/dart/analysis/context_root.dart';
import 'package:analyzer/src/dart/analysis/driver.dart';
import 'package:analyzer/src/generated/engine.dart' show AnalysisOptionsImpl;
import 'package:analyzer/src/test_utilities/package_config_file_builder.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../../abstract_context.dart';

void main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(PluginWatcherTest);
  });
}

@reflectiveTest
class PluginWatcherTest extends AbstractContextTest {
  TestPluginManager manager;
  PluginWatcher watcher;

  @override
  void setUp() {
    super.setUp();
    manager = TestPluginManager();
    watcher = PluginWatcher(resourceProvider, manager);
  }

  Future<void> test_addedDriver() async {
    newPubspecYamlFile('/foo', 'name: foo');
    newFile(
      join('/foo', PluginLocator.toolsFolderName,
          PluginLocator.defaultPluginFolderName, 'bin', 'plugin.dart'),
    );

    writeTestPackageConfig(
      config: PackageConfigFileBuilder()
        ..add(name: 'foo', rootPath: convertPath('/foo')),
    );

    var driver = driverFor(testPackageRootPath);
    _analysisOptionsImpl(driver).enabledPluginNames = ['foo'];

    expect(manager.addedContextRoots, isEmpty);
    watcher.addedDriver(driver);

    //
    // Test to see whether the listener was configured correctly.
    //
    // Use a file in the package being analyzed.
    //
//    await driver.computeResult('package:pkg1/test1.dart');
//    expect(manager.addedContextRoots, isEmpty);
    //
    // Use a file that imports a package with a plugin.
    //
//    await driver.computeResult('package:pkg2/pk2.dart');

    await _waitForEvents();
    expect(manager.addedContextRoots, hasLength(1));
  }

  Future<void> test_addedDriver_missingPackage() async {
    var driver = driverFor(testPackageRootPath);
    _analysisOptionsImpl(driver).enabledPluginNames = ['noSuchPackage'];

    watcher.addedDriver(driver);
    expect(manager.addedContextRoots, isEmpty);

    await _waitForEvents();
    expect(manager.addedContextRoots, isEmpty);
  }

  void test_creation() {
    expect(watcher.resourceProvider, resourceProvider);
    expect(watcher.manager, manager);
  }

  void test_removedDriver() {
    var driver = driverFor(testPackageRootPath);
    var contextRoot = driver.analysisContext.contextRoot;
    watcher.addedDriver(driver);
    watcher.removedDriver(driver);
    expect(manager.removedContextRoots, equals([contextRoot]));
  }

  AnalysisOptionsImpl _analysisOptionsImpl(AnalysisDriver driver) {
    return driver.analysisOptions as AnalysisOptionsImpl;
  }

  /// Wait until the timer associated with the driver's FileSystemState is
  /// guaranteed to have expired and the list of changed files will have been
  /// delivered.
  Future<void> _waitForEvents() async {
    await Future.delayed(Duration(seconds: 1));
  }
}

class TestPluginManager implements PluginManager {
  List<ContextRoot> addedContextRoots = <ContextRoot>[];

  List<ContextRoot> removedContextRoots = <ContextRoot>[];

  @override
  Future<void> addPluginToContextRoot(
      ContextRoot contextRoot, String path) async {
    addedContextRoots.add(contextRoot);
    return null;
  }

  @override
  dynamic noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);

  @override
  void recordPluginFailure(String hostPackageName, String message) {}

  @override
  void removedContextRoot(ContextRoot contextRoot) {
    removedContextRoots.add(contextRoot);
  }
}