// Copyright 2014 The Flutter 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 'package:flutter_goldens/flutter_goldens.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:platform/platform.dart';

enum _Comparator { post, pre, skip, local }

_Comparator _testRecommendations({
  bool hasFlutterRoot = false,
  bool hasLuci = false,
  bool hasCirrus = false,
  bool hasGold = false,
  bool hasTryJob = false,
  String branch = 'main',
  String os = 'macos',
}) {
  final Platform platform = FakePlatform(
    environment: <String, String>{
      if (hasFlutterRoot)
        'FLUTTER_ROOT': '/flutter',
      if (hasLuci)
        'SWARMING_TASK_ID': '8675309',
      if (hasCirrus)
        'CIRRUS_CI': 'true',
      if (hasCirrus)
        'CIRRUS_PR': '',
      if (hasCirrus)
        'CIRRUS_BRANCH': branch,
      if (hasGold)
        'GOLDCTL': 'goldctl',
      if (hasGold && hasCirrus)
        'GOLD_SERVICE_ACCOUNT': 'service account...',
      if (hasTryJob)
        'GOLD_TRYJOB': 'git/ref/12345/head',
      'GIT_BRANCH': branch,
    },
    operatingSystem: os,
  );
  if (FlutterPostSubmitFileComparator.isAvailableForEnvironment(platform)) {
    return _Comparator.post;
  }
  if (FlutterPreSubmitFileComparator.isAvailableForEnvironment(platform)) {
    return _Comparator.pre;
  }
  if (FlutterSkippingFileComparator.isAvailableForEnvironment(platform)) {
    return _Comparator.skip;
  }
  return _Comparator.local;
}

void main() {
  test('Comparator recommendations - main branch', () {
    // If we're running locally (no CI), use a local comparator.
    expect(_testRecommendations(), _Comparator.local);
    expect(_testRecommendations(hasFlutterRoot: true), _Comparator.local);
    expect(_testRecommendations(hasGold: true), _Comparator.local);
    expect(_testRecommendations(hasFlutterRoot: true, hasGold: true), _Comparator.local);

    // If we don't have gold but are on CI, we skip regardless.
    expect(_testRecommendations(hasLuci: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasLuci: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasCirrus: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasCirrus: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasLuci: true, hasCirrus: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasLuci: true, hasCirrus: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasFlutterRoot: true, hasLuci: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasFlutterRoot: true, hasLuci: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasFlutterRoot: true, hasCirrus: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasFlutterRoot: true, hasCirrus: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasFlutterRoot: true, hasLuci: true, hasCirrus: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasFlutterRoot: true, hasLuci: true, hasCirrus: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip

    // On Luci, with Gold, post-submit. Flutter root and Cirrus variables should have no effect.
    expect(_testRecommendations(hasGold: true, hasLuci: true), _Comparator.post);
    expect(_testRecommendations(hasGold: true, hasLuci: true, hasCirrus: true), _Comparator.post);
    expect(_testRecommendations(hasGold: true, hasLuci: true, hasFlutterRoot: true), _Comparator.post);
    expect(_testRecommendations(hasGold: true, hasLuci: true, hasFlutterRoot: true, hasCirrus: true), _Comparator.post);

    // On Luci, with Gold, pre-submit. Flutter root and Cirrus variables should have no effect.
    expect(_testRecommendations(hasGold: true, hasLuci: true, hasTryJob: true), _Comparator.pre);
    expect(_testRecommendations(hasGold: true, hasLuci: true, hasCirrus: true, hasTryJob: true), _Comparator.pre);
    expect(_testRecommendations(hasGold: true, hasLuci: true, hasFlutterRoot: true, hasTryJob: true), _Comparator.pre);
    expect(_testRecommendations(hasGold: true, hasLuci: true, hasFlutterRoot: true, hasCirrus: true, hasTryJob: true), _Comparator.pre);

    // On Cirrus (with Gold and not on Luci), we skip regardless.
    expect(_testRecommendations(hasCirrus: true, hasGold: true, hasFlutterRoot: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(hasCirrus: true, hasGold: true, hasFlutterRoot: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
  });

  test('Comparator recommendations - release branch', () {
    // If we're running locally (no CI), use a local comparator.
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0'), _Comparator.local);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasFlutterRoot: true), _Comparator.local);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasGold: true), _Comparator.local);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasFlutterRoot: true, hasGold: true), _Comparator.local);

    // If we don't have gold but are on CI, we skip regardless.
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasLuci: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasLuci: true, hasTryJob: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasCirrus: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasCirrus: true, hasTryJob: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasLuci: true, hasCirrus: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasLuci: true, hasCirrus: true, hasTryJob: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasFlutterRoot: true, hasLuci: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasFlutterRoot: true, hasLuci: true, hasTryJob: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasFlutterRoot: true, hasCirrus: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasFlutterRoot: true, hasCirrus: true, hasTryJob: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasFlutterRoot: true, hasLuci: true, hasCirrus: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasFlutterRoot: true, hasLuci: true, hasCirrus: true, hasTryJob: true), _Comparator.skip);

    // On Luci, with Gold, post-submit. Flutter root and Cirrus variables should have no effect. Branch should make us skip.
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasGold: true, hasLuci: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasGold: true, hasLuci: true, hasCirrus: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasGold: true, hasLuci: true, hasFlutterRoot: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasGold: true, hasLuci: true, hasFlutterRoot: true, hasCirrus: true), _Comparator.skip);

    // On Luci, with Gold, pre-submit. Flutter root and Cirrus variables should have no effect. Branch should make us skip.
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasGold: true, hasLuci: true, hasTryJob: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasGold: true, hasLuci: true, hasCirrus: true, hasTryJob: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasGold: true, hasLuci: true, hasFlutterRoot: true, hasTryJob: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasGold: true, hasLuci: true, hasFlutterRoot: true, hasCirrus: true, hasTryJob: true), _Comparator.skip);

    // On Cirrus (with Gold and not on Luci), we skip regardless.
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasCirrus: true, hasGold: true, hasFlutterRoot: true), _Comparator.skip);
    expect(_testRecommendations(branch: 'flutter-3.16-candidate.0', hasCirrus: true, hasGold: true, hasFlutterRoot: true, hasTryJob: true), _Comparator.skip);
  });

  test('Comparator recommendations - Linux', () {
    // If we're running locally (no CI), use a local comparator.
    expect(_testRecommendations(os: 'linux'), _Comparator.local);
    expect(_testRecommendations(os: 'linux', hasFlutterRoot: true), _Comparator.local);
    expect(_testRecommendations(os: 'linux', hasGold: true), _Comparator.local);
    expect(_testRecommendations(os: 'linux', hasFlutterRoot: true, hasGold: true), _Comparator.local);

    // If we don't have gold but are on CI, we skip regardless.
    expect(_testRecommendations(os: 'linux', hasLuci: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasLuci: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasCirrus: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasCirrus: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasLuci: true, hasCirrus: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasLuci: true, hasCirrus: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasFlutterRoot: true, hasLuci: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasFlutterRoot: true, hasLuci: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasFlutterRoot: true, hasCirrus: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasFlutterRoot: true, hasCirrus: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasFlutterRoot: true, hasLuci: true, hasCirrus: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasFlutterRoot: true, hasLuci: true, hasCirrus: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip

    // On Luci, with Gold, post-submit. Flutter root and Cirrus variables should have no effect.
    expect(_testRecommendations(os: 'linux', hasGold: true, hasLuci: true), _Comparator.post);
    expect(_testRecommendations(os: 'linux', hasGold: true, hasLuci: true, hasCirrus: true), _Comparator.post);
    expect(_testRecommendations(os: 'linux', hasGold: true, hasLuci: true, hasFlutterRoot: true), _Comparator.post);
    expect(_testRecommendations(os: 'linux', hasGold: true, hasLuci: true, hasFlutterRoot: true, hasCirrus: true), _Comparator.post);

    // On Luci, with Gold, pre-submit. Flutter root and Cirrus variables should have no effect.
    expect(_testRecommendations(os: 'linux', hasGold: true, hasLuci: true, hasTryJob: true), _Comparator.pre);
    expect(_testRecommendations(os: 'linux', hasGold: true, hasLuci: true, hasCirrus: true, hasTryJob: true), _Comparator.pre);
    expect(_testRecommendations(os: 'linux', hasGold: true, hasLuci: true, hasFlutterRoot: true, hasTryJob: true), _Comparator.pre);
    expect(_testRecommendations(os: 'linux', hasGold: true, hasLuci: true, hasFlutterRoot: true, hasCirrus: true, hasTryJob: true), _Comparator.pre);

    // On Cirrus (with Gold and not on Luci), we skip regardless.
    expect(_testRecommendations(os: 'linux', hasCirrus: true, hasGold: true, hasFlutterRoot: true), _Comparator.local); // TODO(ianh): this should be skip
    expect(_testRecommendations(os: 'linux', hasCirrus: true, hasGold: true, hasFlutterRoot: true, hasTryJob: true), _Comparator.local); // TODO(ianh): this should be skip
  });
}
