using FluentAssertions;
using Microsoft.Extensions.Logging;
using Moq;
using NUnit.Framework;
using Strata.ContinuousImprovement.Biz.Configuration;
using Strata.ContinuousImprovement.Biz.DbContexts;
using Strata.ContinuousImprovement.Biz.FiscalMonths;
using Strata.ContinuousImprovement.JazzEntityFrameworkStub;
using Strata.SqlTools.Configuration.Common.AsyncFactory;
using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace Strata.ContinuousImprovement.Biz.Test.Unit.Configuration
{
    [TestFixture, Category("Unit")]
    public class ConfigurationServiceTest
    {

        private Mock<IConfigurationService> _configurationServiceMock;
        private Mock<IAsyncDbContextFactory<JazzDbContext>> _dbContextFactoryMock;
        private Mock<IJazzDbContext> _jazzDbContextMock;
        private Mock<IFiscalMonthResolver> _fiscalMonthResolverMock;

        [SetUp]
        public void TestSetUp()
        {
            _configurationServiceMock = new Mock<IConfigurationService>();
            _dbContextFactoryMock = new Mock<IAsyncDbContextFactory<JazzDbContext>>();
            _jazzDbContextMock = new Mock<IJazzDbContext>();
            _fiscalMonthResolverMock = new Mock<IFiscalMonthResolver>();
        }

        [TestCaseSource(typeof(JazzEntityFrameworkFactory), nameof(JazzEntityFrameworkFactory.GetFrameworksWithCancellation))]
        public async Task TestGetDefaultConfigurationMock(JazzEntityFrameworkFactory framework, CancellationToken cancellationToken)
        {
            // arrange
            await framework.CreateDbContextAsync(CancellationToken.None);
            var dfltConfiguration = framework.Configurations.OrderBy(c => c.DisplayOrder).First();
            _configurationServiceMock
                .Setup(vos => vos
                    .GetDefaultConfigurationAsync(It.IsAny<CancellationToken>()))
                .ReturnsAsync(dfltConfiguration);
            var logger = Mock.Of<ILogger<ConfigurationService>>();
            var _configurationService = new ConfigurationService(framework, null, null, logger, _fiscalMonthResolverMock.Object);
            try
            {
                // act
                var taskResult = await _configurationService.GetDefaultConfigurationAsync(cancellationToken);

                // assert
                if (taskResult == null)
                {
                    framework.JazzDbContext.Should().BeNull();
                    return;
                }
                taskResult.Should().BeOfType<Biz.Configuration.Configuration>();
                taskResult.Name.Should().Be(dfltConfiguration.Name);
                taskResult.DisplayOrder.Should().Be(dfltConfiguration.DisplayOrder);
            }
            catch (OperationCanceledException)
            {
                cancellationToken.Should().NotBe(CancellationToken.None);
            }
            catch (Exception)
            {
                // Intentionally left empty
            }
        }

        [TestCaseSource(typeof(JazzEntityFrameworkFactory), nameof(JazzEntityFrameworkFactory.GetFrameworksWithCancellation))]
        public async Task TestGetDefaultConfiguration(JazzEntityFrameworkFactory jazzEntityFrameworkFactory, CancellationToken cancellationToken)
        {
            try
            {
                // arrange
                var logger = Mock.Of<ILogger<ConfigurationService>>();
                await jazzEntityFrameworkFactory.CreateDbContextAsync(CancellationToken.None);
                var configurationService = new ConfigurationService(jazzEntityFrameworkFactory, null, null, logger, _fiscalMonthResolverMock.Object);

                // act
                var taskResult = await configurationService.GetDefaultConfigurationAsync(cancellationToken);

                // assert
                if (string.IsNullOrEmpty(jazzEntityFrameworkFactory.TestName))
                {
                    taskResult.Should().BeNull();
                }
                else
                {
                    taskResult.Should().NotBeNull()
                        .And.BeOfType<Biz.Configuration.Configuration>();
                    taskResult.QVIOpportunityBreakdownName.Should().NotBeNullOrEmpty();
                    taskResult.QVIOpportunityBreakdownNamePlural.Should().NotBeNullOrEmpty();
                    taskResult.QVIOpportunityBreakdownEnum.Should()
                        .Be((int)taskResult.QVIOpportunityBreakdown);
                }
            }
            catch (AggregateException ae)
            {
                ae.Should().NotBeOfType<AggregateException>();
            }
            catch (InvalidOperationException ioe)
            {
                ioe.Should().NotBeOfType<InvalidOperationException>();
            }
            catch (OperationCanceledException)
            {
                cancellationToken.Should().NotBe(CancellationToken.None);
            }
            catch (Exception)
            {
                // Intentionally left blank
            }
        }

        [TearDown]
        public void TestTearDown()
        {
            // Method intentionally left empty.
        }
    }
}