using System;
using Microsoft.AspNetCore.Http;
using Moq;
using NUnit.Framework;
using Umbraco.Cms.Core.DependencyInjection;
using Umbraco.Cms.Core.Events;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Core.Models.PublishedContent;
using Umbraco.Cms.Core.Notifications;
using Umbraco.Cms.Core.Services;
using Umbraco.Cms.Core.Sync;
using Umbraco.Cms.Core.Web;
using Umbraco.Cms.Infrastructure.DependencyInjection;
using Umbraco.Cms.Tests.Common;
using Umbraco.Cms.Tests.Common.Testing;
using Umbraco.Cms.Tests.Integration.Testing;
using Umbraco.Cms.Tests.Integration.Umbraco.Infrastructure.Scoping;
using Umbraco.Extensions;

namespace Umbraco.Tests.Scoping
{
    [TestFixture]
    [UmbracoTest(Database = UmbracoTestOptions.Database.NewSchemaPerTest)]
    public class ScopedNuCacheTests : UmbracoIntegrationTest
    {
        private IContentService ContentService => GetRequiredService<IContentService>();
        private Mock<IHttpContextAccessor> MockHttpContextAccessor { get; set; } = CreateMockHttpContextAccessor();
        private IUmbracoContextFactory UmbracoContextFactory => GetRequiredService<IUmbracoContextFactory>();
        private IContentTypeService ContentTypeService => GetRequiredService<IContentTypeService>();
        private IVariationContextAccessor VariationContextAccessor => GetRequiredService<IVariationContextAccessor>();

        protected override void CustomTestSetup(IUmbracoBuilder builder)
        {
            NotificationHandler.PublishedContent = notification => { };
            builder.Services.AddUnique<IServerMessenger, ScopedRepositoryTests.LocalServerMessenger>();
            builder.AddCoreNotifications();
            builder.AddNotificationHandler<ContentPublishedNotification, NotificationHandler>();
            builder.Services.AddUnique<IUmbracoContextAccessor, TestUmbracoContextAccessor>();
            builder.Services.AddUnique<IHttpContextAccessor>(MockHttpContextAccessor.Object);
            builder.AddNuCache();
        }

        public class NotificationHandler : INotificationHandler<ContentPublishedNotification>
        {
            public void Handle(ContentPublishedNotification notification) => PublishedContent?.Invoke(notification);

            public static Action<ContentPublishedNotification> PublishedContent { get; set; }
        }

        private static Mock<IHttpContextAccessor> CreateMockHttpContextAccessor()
        {
            var mockHttpContextAccessor = new Mock<IHttpContextAccessor>();
            var httpContext = new DefaultHttpContext();
            httpContext.Request.Scheme = "http";
            httpContext.Request.Host = new HostString("localhost");

            mockHttpContextAccessor.SetupGet(x => x.HttpContext).Returns(httpContext);
            return mockHttpContextAccessor;
        }

        [TestCase(true)]
        [TestCase(false)]
        public void TestScope(bool complete)
        {
            var umbracoContext = UmbracoContextFactory.EnsureUmbracoContext().UmbracoContext;

            // create document type, document
            var contentType = new ContentType(ShortStringHelper, -1) { Alias = "CustomDocument", Name = "Custom Document" };
            ContentTypeService.Save(contentType);
            var item = new Content("name", -1, contentType);

            using (var scope = ScopeProvider.CreateScope())
            {
                ContentService.SaveAndPublish(item);
                scope.Complete();
            }

            // event handler
            var evented = 0;
            NotificationHandler.PublishedContent = notification =>
            {
                evented++;

                var e = umbracoContext.Content.GetById(item.Id);

                // during events, due to LiveSnapshot, we see the changes
                Assert.IsNotNull(e);
                Assert.AreEqual("changed", e.Name(VariationContextAccessor));
            };

            // been created
            var x = umbracoContext.Content.GetById(item.Id);
            Assert.IsNotNull(x);
            Assert.AreEqual("name", x.Name(VariationContextAccessor));

            using (var scope = ScopeProvider.CreateScope())
            {
                item.Name = "changed";
                ContentService.SaveAndPublish(item);

                if (complete)
                {
                    scope.Complete();
                }
            }

            // only 1 event occuring because we are publishing twice for the same event for
            // the same object and the scope deduplicates the events (uses the latest)
            Assert.AreEqual(complete ? 1 : 0, evented);

            // after the scope,
            // if completed, we see the changes
            // else changes have been rolled back
            x = umbracoContext.Content.GetById(item.Id);
            Assert.IsNotNull(x);
            Assert.AreEqual(complete ? "changed" : "name", x.Name(VariationContextAccessor));
        }
    }
}
