// Copyright 2015 The Chromium Authors. 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 'dart:convert';
import 'dart:io' as io;

import 'package:args/command_runner.dart';
import 'package:flutter_tools/src/base/file_system.dart';
import 'package:flutter_tools/src/base/io.dart';
import 'package:flutter_tools/src/cache.dart';
import 'package:flutter_tools/src/commands/create.dart';
import 'package:flutter_tools/src/dart/sdk.dart';
import 'package:test/test.dart';

import '../src/common.dart';
import '../src/context.dart';

void main() {
  group('create', () {
    Directory temp;
    Directory projectDir;

    setUpAll(() {
      Cache.disableLocking();
    });

    setUp(() {
      temp = fs.systemTempDirectory.createTempSync('flutter_tools');
      projectDir = temp.childDirectory('flutter_project');
    });

    tearDown(() {
      temp.deleteSync(recursive: true);
    });

    // Verify that we create a project that is well-formed.
    testUsingContext('project', () async {
      return _createAndAnalyzeProject(
        projectDir,
        <String>[],
        <String>[
          'android/app/src/main/java/com/yourcompany/flutterproject/MainActivity.java',
          'ios/Runner/AppDelegate.h',
          'ios/Runner/AppDelegate.m',
          'ios/Runner/main.m',
          'lib/main.dart',
          'test/widget_test.dart'
        ],
      );
    });

    testUsingContext('kotlin/swift project', () async {
      return _createAndAnalyzeProject(
        projectDir,
        <String>['--android-language', 'kotlin', '-i', 'swift'],
        <String>[
          'android/app/src/main/kotlin/com/yourcompany/flutterproject/MainActivity.kt',
          'ios/Runner/AppDelegate.swift',
          'ios/Runner/Runner-Bridging-Header.h',
          'lib/main.dart',
        ],
        unexpectedPaths: <String>[
          'android/app/src/main/java/com/yourcompany/flutterproject/MainActivity.java',
          'ios/Runner/AppDelegate.h',
          'ios/Runner/AppDelegate.m',
          'ios/Runner/main.m',
        ],
      );
    });

    testUsingContext('package project', () async {
      return _createAndAnalyzeProject(
        projectDir,
        <String>['--template=package'],
        <String>[
          'lib/flutter_project.dart',
          'test/flutter_project_test.dart',
        ],
        unexpectedPaths: <String>[
          'android/app/src/main/java/com/yourcompany/flutterproject/MainActivity.java',
          'android/src/main/java/com/yourcompany/flutterproject/FlutterProjectPlugin.java',
          'ios/Classes/FlutterProjectPlugin.h',
          'ios/Classes/FlutterProjectPlugin.m',
          'ios/Runner/AppDelegate.h',
          'ios/Runner/AppDelegate.m',
          'ios/Runner/main.m',
          'lib/main.dart',
          'example/android/app/src/main/java/com/yourcompany/flutterprojectexample/MainActivity.java',
          'example/ios/Runner/AppDelegate.h',
          'example/ios/Runner/AppDelegate.m',
          'example/ios/Runner/main.m',
          'example/lib/main.dart',
          'test/widget_test.dart',
        ],
      );
    });

    testUsingContext('plugin project', () async {
      return _createAndAnalyzeProject(
        projectDir,
        <String>['--template=plugin'],
        <String>[
          'android/src/main/java/com/yourcompany/flutterproject/FlutterProjectPlugin.java',
          'ios/Classes/FlutterProjectPlugin.h',
          'ios/Classes/FlutterProjectPlugin.m',
          'lib/flutter_project.dart',
          'example/android/app/src/main/java/com/yourcompany/flutterprojectexample/MainActivity.java',
          'example/ios/Runner/AppDelegate.h',
          'example/ios/Runner/AppDelegate.m',
          'example/ios/Runner/main.m',
          'example/lib/main.dart',
        ],
        plugin: true,
      );
    });

    testUsingContext('plugin project (legacy)', () async {
      return _createAndAnalyzeProject(
        projectDir,
        <String>['--plugin'],
        <String>[
          'android/src/main/java/com/yourcompany/flutterproject/FlutterProjectPlugin.java',
          'ios/Classes/FlutterProjectPlugin.h',
          'ios/Classes/FlutterProjectPlugin.m',
          'lib/flutter_project.dart',
          'example/android/app/src/main/java/com/yourcompany/flutterprojectexample/MainActivity.java',
          'example/ios/Runner/AppDelegate.h',
          'example/ios/Runner/AppDelegate.m',
          'example/ios/Runner/main.m',
          'example/lib/main.dart',
        ],
        plugin: true,
      );
    });

    testUsingContext('kotlin/swift plugin project', () async {
      return _createAndAnalyzeProject(
        projectDir,
        <String>['--template=plugin', '-a', 'kotlin', '--ios-language', 'swift'],
        <String>[
          'android/src/main/kotlin/com/yourcompany/flutterproject/FlutterProjectPlugin.kt',
          'ios/Classes/FlutterProjectPlugin.h',
          'ios/Classes/FlutterProjectPlugin.m',
          'ios/Classes/SwiftFlutterProjectPlugin.swift',
          'lib/flutter_project.dart',
          'example/android/app/src/main/kotlin/com/yourcompany/flutterprojectexample/MainActivity.kt',
          'example/ios/Runner/AppDelegate.swift',
          'example/ios/Runner/Runner-Bridging-Header.h',
          'example/lib/main.dart',
        ],
        unexpectedPaths: <String>[
          'android/src/main/java/com/yourcompany/flutterproject/FlutterProjectPlugin.java',
          'example/android/app/src/main/java/com/yourcompany/flutterprojectexample/MainActivity.java',
          'example/ios/Runner/AppDelegate.h',
          'example/ios/Runner/AppDelegate.m',
          'example/ios/Runner/main.m',
        ],
        plugin: true,
      );
    });

    testUsingContext('plugin project with custom org', () async {
      return _createAndAnalyzeProject(
          projectDir,
          <String>['--template=plugin', '--org', 'com.bar.foo'],
          <String>[
            'android/src/main/java/com/bar/foo/flutterproject/FlutterProjectPlugin.java',
            'example/android/app/src/main/java/com/bar/foo/flutterprojectexample/MainActivity.java',
          ],
          unexpectedPaths: <String>[
            'android/src/main/java/com/yourcompany/flutterproject/FlutterProjectPlugin.java',
            'example/android/app/src/main/java/com/yourcompany/flutterprojectexample/MainActivity.java',
          ],
          plugin: true,
      );
    });

    testUsingContext('project with-driver-test', () async {
      return _createAndAnalyzeProject(
        projectDir,
        <String>['--with-driver-test'],
        <String>['lib/main.dart'],
      );
    });

    // Verify content and formatting
    testUsingContext('content', () async {
      Cache.flutterRoot = '../..';

      final CreateCommand command = new CreateCommand();
      final CommandRunner<Null> runner = createTestCommandRunner(command);

      await runner.run(<String>['create', '--no-pub', '--org', 'com.foo.bar', projectDir.path]);

      void expectExists(String relPath) {
        expect(fs.isFileSync('${projectDir.path}/$relPath'), true);
      }

      expectExists('lib/main.dart');
      for (FileSystemEntity file in projectDir.listSync(recursive: true)) {
        if (file is File && file.path.endsWith('.dart')) {
          final String original = file.readAsStringSync();

          final Process process = await Process.start(
            sdkBinaryName('dartfmt'),
            <String>[file.path],
            workingDirectory: projectDir.path,
          );
          final String formatted = await process.stdout.transform(UTF8.decoder).join();

          expect(original, formatted, reason: file.path);
        }
      }

      // TODO(pq): enable when sky_shell is available
      if (!io.Platform.isWindows) {
        // Verify that the sample widget test runs cleanly.
        final List<String> args = <String>[
          fs.path.absolute(fs.path.join('bin', 'flutter_tools.dart')),
          'test',
          '--no-color',
          fs.path.join(projectDir.path, 'test', 'widget_test.dart'),
        ];

        final ProcessResult result = await Process.run(
          fs.path.join(dartSdkPath, 'bin', 'dart'),
          args,
          workingDirectory: projectDir.path,
        );
        expect(result.exitCode, 0);
      }

      // Generated Xcode settings
      final String xcodeConfigPath = fs.path.join('ios', 'Flutter', 'Generated.xcconfig');
      expectExists(xcodeConfigPath);
      final File xcodeConfigFile = fs.file(fs.path.join(projectDir.path, xcodeConfigPath));
      final String xcodeConfig = xcodeConfigFile.readAsStringSync();
      expect(xcodeConfig, contains('FLUTTER_ROOT='));
      expect(xcodeConfig, contains('FLUTTER_APPLICATION_PATH='));
      expect(xcodeConfig, contains('FLUTTER_FRAMEWORK_DIR='));
      // App identification
      final String xcodeProjectPath = fs.path.join('ios', 'Runner.xcodeproj', 'project.pbxproj');
      expectExists(xcodeProjectPath);
      final File xcodeProjectFile = fs.file(fs.path.join(projectDir.path, xcodeProjectPath));
      final String xcodeProject = xcodeProjectFile.readAsStringSync();
      expect(xcodeProject, contains('PRODUCT_BUNDLE_IDENTIFIER = com.foo.bar.flutterProject'));
    });

    // Verify that we can regenerate over an existing project.
    testUsingContext('can re-gen over existing project', () async {
      Cache.flutterRoot = '../..';

      final CreateCommand command = new CreateCommand();
      final CommandRunner<Null> runner = createTestCommandRunner(command);

      await runner.run(<String>['create', '--no-pub', projectDir.path]);

      await runner.run(<String>['create', '--no-pub', projectDir.path]);
    });

    // Verify that we help the user correct an option ordering issue
    testUsingContext('produces sensible error message', () async {
      Cache.flutterRoot = '../..';

      final CreateCommand command = new CreateCommand();
      final CommandRunner<Null> runner = createTestCommandRunner(command);

      expect(
        runner.run(<String>['create', projectDir.path, '--pub']),
        throwsToolExit(exitCode: 2, message: 'Try moving --pub'),
      );
    });

    // Verify that we fail with an error code when the file exists.
    testUsingContext('fails when file exists', () async {
      Cache.flutterRoot = '../..';
      final CreateCommand command = new CreateCommand();
      final CommandRunner<Null> runner = createTestCommandRunner(command);
      final File existingFile = fs.file("${projectDir.path.toString()}/bad");
      if (!existingFile.existsSync())
        existingFile.createSync(recursive: true);
      expect(
        runner.run(<String>['create', existingFile.path]),
        throwsToolExit(message: 'file exists'),
      );
    });

    testUsingContext('fails when invalid package name', () async {
      Cache.flutterRoot = '../..';
      final CreateCommand command = new CreateCommand();
      final CommandRunner<Null> runner = createTestCommandRunner(command);
      expect(
        runner.run(<String>['create', fs.path.join(projectDir.path, 'invalidName')]),
        throwsToolExit(message: '"invalidName" is not a valid Dart package name.'),
      );
    });
  });
}

Future<Null> _createAndAnalyzeProject(
    Directory dir, List<String> createArgs, List<String> expectedPaths,
    { List<String> unexpectedPaths = const <String>[], bool plugin = false }) async {
  Cache.flutterRoot = '../..';
  final CreateCommand command = new CreateCommand();
  final CommandRunner<Null> runner = createTestCommandRunner(command);
  final List<String> args = <String>['create'];
  args.addAll(createArgs);
  args.add(dir.path);
  await runner.run(args);

  for (String path in expectedPaths) {
    expect(fs.file(fs.path.join(dir.path, path)).existsSync(), true, reason: '$path does not exist');
  }
  for (String path in unexpectedPaths) {
    expect(fs.file(fs.path.join(dir.path, path)).existsSync(), false, reason: '$path exists');
  }

  if (plugin) {
    _analyze(dir.path, target: fs.path.join(dir.path, 'lib', 'flutter_project.dart'));
    _analyze(fs.path.join(dir.path, 'example'));
  } else {
    _analyze(dir.path);
  }
}

void _analyze(String workingDir, {String target}) {
  final String flutterToolsPath = fs.path.absolute(fs.path.join(
    'bin',
    'flutter_tools.dart',
  ));

  final List<String> args = <String>[flutterToolsPath, 'analyze'];
  if (target != null)
    args.add(target);

  final ProcessResult exec = Process.runSync(
    '$dartSdkPath/bin/dart',
    args,
    workingDirectory: workingDir,
  );
  if (exec.exitCode != 0) {
    print(exec.stdout);
    print(exec.stderr);
  }
  expect(exec.exitCode, 0);
}