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

using FakeItEasy;
using Microsoft.Extensions.Logging;
using Xunit;

namespace Squidex.Infrastructure.Commands
{
    public class LogCommandMiddlewareTests
    {
        private readonly ILogger<LogCommandMiddleware> log = A.Fake<ILogger<LogCommandMiddleware>>();
        private readonly LogCommandMiddleware sut;
        private readonly ICommand command = A.Dummy<ICommand>();
        private readonly ICommandBus commandBus = A.Dummy<ICommandBus>();

        public LogCommandMiddlewareTests()
        {
            A.CallTo(() => log.IsEnabled(A<LogLevel>._))
                .Returns(true);

            sut = new LogCommandMiddleware(log);
        }

        [Fact]
        public async Task Should_log_before_and_after_request()
        {
            var context = new CommandContext(command, commandBus);

            await sut.HandleAsync(context, c =>
            {
                context.Complete(true);

                return Task.CompletedTask;
            });

            A.CallTo(log).Where(x => x.Method.Name == "Log" && x.GetArgument<LogLevel>(0) == LogLevel.Debug)
                .MustHaveHappened();

            A.CallTo(log).Where(x => x.Method.Name == "Log" && x.GetArgument<LogLevel>(0) == LogLevel.Information)
                .MustHaveHappenedTwiceExactly();
        }

        [Fact]
        public async Task Should_log_error_if_command_failed()
        {
            var context = new CommandContext(command, commandBus);

            await Assert.ThrowsAsync<InvalidOperationException>(async () =>
            {
                await sut.HandleAsync(context, c => throw new InvalidOperationException());
            });

            A.CallTo(log).Where(x => x.Method.Name == "Log" && x.GetArgument<LogLevel>(0) == LogLevel.Debug)
                .MustHaveHappened();

            A.CallTo(log).Where(x => x.Method.Name == "Log" && x.GetArgument<LogLevel>(0) == LogLevel.Information)
                .MustHaveHappened();

            A.CallTo(log).Where(x => x.Method.Name == "Log" && x.GetArgument<LogLevel>(0) == LogLevel.Error)
                .MustHaveHappened();
        }

        [Fact]
        public async Task Should_log_if_command_is_not_handled()
        {
            var context = new CommandContext(command, commandBus);

            await sut.HandleAsync(context, c => Task.CompletedTask);

            A.CallTo(log).Where(x => x.Method.Name == "Log" && x.GetArgument<LogLevel>(0) == LogLevel.Debug)
                .MustHaveHappened();

            A.CallTo(log).Where(x => x.Method.Name == "Log" && x.GetArgument<LogLevel>(0) == LogLevel.Information)
                .MustHaveHappenedTwiceExactly();

            A.CallTo(log).Where(x => x.Method.Name == "Log" && x.GetArgument<LogLevel>(0) == LogLevel.Critical)
                .MustHaveHappened();
        }
    }
}