// Copyright 2021 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:cocoon_service/src/model/ci_yaml/ci_yaml.dart';
import 'package:cocoon_service/src/model/proto/internal/scheduler.pb.dart';
import 'package:cocoon_service/src/service/config.dart';

import 'package:test/test.dart';
import 'package:yaml/yaml.dart';

void main() {
  group('scheduler config', () {
    test('constructs graph with one target', () {
      final YamlMap? singleTargetConfig = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
    builder: builderA
    properties:
      test: abc
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(singleTargetConfig);
      final SchedulerConfig schedulerConfig = CiYaml(
        slug: Config.flutterSlug,
        branch: Config.defaultBranch(Config.flutterSlug),
        config: unCheckedSchedulerConfig,
      ).config;
      expect(schedulerConfig.enabledBranches, <String>['master']);
      expect(schedulerConfig.targets.length, 1);
      final Target target = schedulerConfig.targets.first;
      expect(target.bringup, false);
      expect(target.name, 'A');
      expect(target.properties, <String, String>{
        'test': 'abc',
      });
      expect(target.scheduler, SchedulerSystem.cocoon);
      expect(target.testbed, 'linux-vm');
      expect(target.timeout, 30);
    });

    test('throws exception when non-existent scheduler is given', () {
      final YamlMap? targetWithNonexistentScheduler = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
    scheduler: dashatar
      ''') as YamlMap?;
      expect(
        () {
          final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()
            ..mergeFromProto3Json(targetWithNonexistentScheduler);
          CiYaml(
            slug: Config.flutterSlug,
            branch: Config.defaultBranch(Config.flutterSlug),
            config: unCheckedSchedulerConfig,
          ).config;
        },
        throwsA(isA<FormatException>()),
      );
    });

    test('constructs graph with dependency chain', () {
      final YamlMap? dependentTargetConfig = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
  - name: B
    dependencies:
      - A
    properties:
      dependencies: >-
        [
          {"dependency": "android_sdk", "version": "version:31v8"},
          {"dependency": "certs", "version": "version:9563bb"},
          {"dependency": "chrome_and_driver", "version": "version:96.2"},
          {"dependency": "open_jdk", "version": "11"}
        ]
  - name: C
    dependencies:
      - B
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(dependentTargetConfig);
      final SchedulerConfig schedulerConfig = CiYaml(
        slug: Config.flutterSlug,
        branch: Config.defaultBranch(Config.flutterSlug),
        config: unCheckedSchedulerConfig,
      ).config;
      expect(schedulerConfig.targets.length, 3);
      final Target a = schedulerConfig.targets.first;
      final Target b = schedulerConfig.targets[1];
      final Target c = schedulerConfig.targets[2];
      expect(a.name, 'A');
      expect(b.name, 'B');
      expect(b.dependencies, <String>['A']);
      expect(c.name, 'C');
      expect(c.dependencies, <String>['B']);
    });

    test('constructs graph with parent with two dependents', () {
      final YamlMap? twoDependentTargetConfig = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
  - name: B1
    dependencies:
      - A
  - name: B2
    dependencies:
      - A
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(twoDependentTargetConfig);
      final SchedulerConfig schedulerConfig = CiYaml(
        slug: Config.flutterSlug,
        branch: Config.defaultBranch(Config.flutterSlug),
        config: unCheckedSchedulerConfig,
      ).config;
      expect(schedulerConfig.targets.length, 3);
      final Target a = schedulerConfig.targets.first;
      final Target b1 = schedulerConfig.targets[1];
      final Target b2 = schedulerConfig.targets[2];
      expect(a.name, 'A');
      expect(b1.name, 'B1');
      expect(b1.dependencies, <String>['A']);
      expect(b2.name, 'B2');
      expect(b2.dependencies, <String>['A']);
    });

    test('fails when there are cyclic targets', () {
      final YamlMap? configWithCycle = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
    dependencies:
      - B
  - name: B
    dependencies:
      - A
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(configWithCycle);
      expect(
        () => CiYaml(
          slug: Config.flutterSlug,
          branch: Config.defaultBranch(Config.flutterSlug),
          config: unCheckedSchedulerConfig,
        ).config,
        throwsA(
          isA<FormatException>().having(
            (FormatException e) => e.toString(),
            'message',
            contains('ERROR: A depends on B which does not exist'),
          ),
        ),
      );
    });

    test('fails when there are duplicate targets', () {
      final YamlMap? configWithDuplicateTargets = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
  - name: A
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()
        ..mergeFromProto3Json(configWithDuplicateTargets);
      expect(
        () => CiYaml(
          slug: Config.flutterSlug,
          branch: Config.defaultBranch(Config.flutterSlug),
          config: unCheckedSchedulerConfig,
        ).config,
        throwsA(
          isA<FormatException>().having(
            (FormatException e) => e.toString(),
            'message',
            contains('ERROR: A already exists in graph'),
          ),
        ),
      );
    });

    test('fails when there are multiple dependencies', () {
      final YamlMap? configWithMultipleDependencies = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
  - name: B
  - name: C
    dependencies:
      - A
      - B
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()
        ..mergeFromProto3Json(configWithMultipleDependencies);
      expect(
        () => CiYaml(
          slug: Config.flutterSlug,
          branch: Config.defaultBranch(Config.flutterSlug),
          config: unCheckedSchedulerConfig,
        ).config,
        throwsA(
          isA<FormatException>().having(
            (FormatException e) => e.toString(),
            'message',
            contains('ERROR: C has multiple dependencies which is not supported. Use only one dependency'),
          ),
        ),
      );
    });

    test('fails when dependency does not exist', () {
      final YamlMap? configWithMissingTarget = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
    dependencies:
      - B
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(configWithMissingTarget);
      expect(
        () => CiYaml(
          slug: Config.flutterSlug,
          branch: Config.defaultBranch(Config.flutterSlug),
          config: unCheckedSchedulerConfig,
        ).config,
        throwsA(
          isA<FormatException>().having(
            (FormatException e) => e.toString(),
            'message',
            contains('ERROR: A depends on B which does not exist'),
          ),
        ),
      );
    });
  });

  group('validate scheduler config and compared with tip of tree targets', () {
    late CiYaml? totConfig;

    setUp(() {
      final YamlMap? totYaml = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(totYaml);
      totConfig = CiYaml(
        slug: Config.flutterSlug,
        branch: Config.defaultBranch(Config.flutterSlug),
        config: unCheckedSchedulerConfig,
      );
    });

    test('succeed when no new builders compared with tip of tree builders', () {
      final YamlMap? currentYaml = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(currentYaml);
      expect(
        () => CiYaml(
          slug: Config.flutterSlug,
          branch: Config.defaultBranch(Config.flutterSlug),
          config: unCheckedSchedulerConfig,
          totConfig: totConfig,
        ),
        returnsNormally,
      );
    });

    test('succeed when new builder is marked with bringup:true ', () {
      final YamlMap? currentYaml = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
  - name: B
    bringup: true
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(currentYaml);
      expect(
        () => CiYaml(
          slug: Config.flutterSlug,
          branch: Config.defaultBranch(Config.flutterSlug),
          config: unCheckedSchedulerConfig,
          totConfig: totConfig,
        ),
        returnsNormally,
      );
    });

    test('fails when new builder is missing bringup:true ', () {
      final YamlMap? currentYaml = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
  - name: B
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(currentYaml);
      expect(
        () => CiYaml(
          slug: Config.flutterSlug,
          branch: Config.defaultBranch(Config.flutterSlug),
          config: unCheckedSchedulerConfig,
          totConfig: totConfig,
        ),
        throwsA(
          isA<FormatException>().having(
            (FormatException e) => e.toString(),
            'message',
            contains('ERROR: B is a new builder added. it needs to be marked bringup: true'),
          ),
        ),
      );
    });

    test('fails when new builder has bringup set to false ', () {
      final YamlMap? currentYaml = loadYaml('''
enabled_branches:
  - master
targets:
  - name: A
  - name: B
    bringup: false
      ''') as YamlMap?;
      final SchedulerConfig unCheckedSchedulerConfig = SchedulerConfig()..mergeFromProto3Json(currentYaml);
      expect(
        () => CiYaml(
          slug: Config.flutterSlug,
          branch: Config.defaultBranch(Config.flutterSlug),
          config: unCheckedSchedulerConfig,
          totConfig: totConfig,
        ),
        throwsA(
          isA<FormatException>().having(
            (FormatException e) => e.toString(),
            'message',
            contains('ERROR: B is a new builder added. it needs to be marked bringup: true'),
          ),
        ),
      );
    });
  });
}