// ==========================================================================
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex UG (haftungsbeschraenkt)
//  All rights reserved. Licensed under the MIT license.
// ==========================================================================

using System.Reactive.Linq;
using FakeItEasy;
using GraphQL;
using Squidex.Domain.Apps.Core.Contents;
using Squidex.Domain.Apps.Core.Rules.EnrichedEvents;
using Squidex.Domain.Apps.Core.Subscriptions;
using Squidex.Infrastructure;
using Squidex.Shared;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Contents.GraphQL
{
    public class GraphQLSubscriptionTests : GraphQLTestBase
    {
        [Fact]
        public async Task Should_subscribe_to_assets()
        {
            var id = DomainId.NewGuid();

            var query = CreateQuery(@"
                subscription {
                  assetChanges {
                    id,
                    fileName,
                    fileSize
                  }
                }");

            var stream =
                Observable.Return<object>(
                    new EnrichedAssetEvent
                    {
                        Id = id,
                        FileName = "image.png",
                        FileSize = 1024
                    });

            A.CallTo(() => subscriptionService.Subscribe<object>(A<AssetSubscription>._))
                .Returns(stream);

            var permission = PermissionIds.ForApp(PermissionIds.AppAssetsRead, TestApp.Default.Name);

            var actual = await ExecuteAsync(new ExecutionOptions { Query = query }, permission.Id);

            var expected = new
            {
                data = new
                {
                    assetChanges = new
                    {
                        id,
                        fileName = "image.png",
                        fileSize = 1024
                    }
                }
            };

            AssertResult(expected, actual);
        }

        [Fact]
        public async Task Should_return_error_if_user_has_no_permissions_for_assets()
        {
            var query = CreateQuery(@"
                subscription {
                  assetChanges {
                    id,
                    fileName,
                    fileSize
                  }
                }");

            var actual = await ExecuteAsync(new ExecutionOptions { Query = query });

            var expected = new
            {
                errors = new[]
                {
                    new
                    {
                        message = "You do not have the necessary permission.",
                        locations = new[]
                        {
                            new
                            {
                                line = 3,
                                column = 19
                            }
                        },
                        path = new[]
                        {
                            "assetChanges"
                        }
                    }
                },
                data = (object?)null
            };

            AssertResult(expected, actual);
        }

        [Fact]
        public async Task Should_subscribe_to_contents()
        {
            var id = DomainId.NewGuid();

            var query = CreateQuery(@"
                subscription {
                  contentChanges {
                    id,
                    data
                  }
                }");

            var stream =
                Observable.Return<object>(
                    new EnrichedContentEvent
                    {
                        Id = id,
                        Data = new ContentData()
                            .AddField("field",
                                new ContentFieldData()
                                    .AddInvariant(42))
                    });

            A.CallTo(() => subscriptionService.Subscribe<object>(A<ContentSubscription>._))
                .Returns(stream);

            var permission = PermissionIds.ForApp(PermissionIds.AppContentsRead, TestApp.Default.Name, "random-schema");

            var actual = await ExecuteAsync(new ExecutionOptions { Query = query }, permission.Id);

            var expected = new
            {
                data = new
                {
                    contentChanges = new
                    {
                        id,
                        data = new
                        {
                            field = new
                            {
                                iv = 42
                            }
                        }
                    }
                }
            };

            AssertResult(expected, actual);
        }

        [Fact]
        public async Task Should_return_error_if_user_has_no_permissions_for_contents()
        {
            var query = CreateQuery(@"
                subscription {
                  contentChanges {
                    id,
                    data
                  }
                }");

            var actual = await ExecuteAsync(new ExecutionOptions { Query = query });

            var expected = new
            {
                errors = new[]
                {
                    new
                    {
                        message = "You do not have the necessary permission.",
                        locations = new[]
                        {
                            new
                            {
                                line = 3,
                                column = 19
                            }
                        },
                        path = new[]
                        {
                            "contentChanges"
                        }
                    }
                },
                data = (object?)null
            };

            AssertResult(expected, actual);
        }
    }
}