using FluentAssertions;
using Moq;
using NUnit.Framework;
using Strata.ContinuousImprovement.Biz.Filter;
using Strata.ContinuousImprovement.Biz.Pagination;
using Strata.ContinuousImprovement.Biz.QualityVariation.Breakdowns;
using Strata.ContinuousImprovement.Biz.QualityVariation.Breakdowns.Filters;
using Strata.ContinuousImprovement.JazzEntityFrameworkStub;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace Strata.ContinuousImprovement.Biz.Test.Unit.QualityVariation.Breakdowns
{
    [TestFixture, Category("Unit")]
    public class QVIBreakdownServiceTest
    {
        private Mock<IQVIBreakdownService> _qviBreakdownServiceMock;

        [SetUp]
        public void TestSetUp()
        {
            _qviBreakdownServiceMock = new Mock<IQVIBreakdownService>();
        }

        [TestCaseSource(nameof(GetFrameworkWithFilterData))]
        public async Task TestGetPagedAsyncWithFramework(JazzEntityFrameworkFactory jazzEntityFrameworkFactory, QVIBreakdownFilters filters, CancellationToken cancellationToken)
        {
            // arrange
            var qviBreakdownService = new QVIBreakdownService(jazzEntityFrameworkFactory, null, null);

            try
            {
                // act
                var taskResult = await qviBreakdownService
                    .GetPagedAsync(new PagingOptions(), filters, cancellationToken);

                // assert
                var result = taskResult.Data;
                if (string.IsNullOrEmpty(jazzEntityFrameworkFactory.TestName))
                {
                    result.Should().BeNullOrEmpty();
                    return;
                }

                result.Should()
                    .NotBeNullOrEmpty()
                    .And.AllBeOfType<QVIBreakdown>();

                if (filters.BreakdownIds.Any())
                    result.Should()
                        .Contain(vo => filters.BreakdownIds.Contains(vo.BreakdownId.ToString()));
            }
            catch (AssertionException)
            {
                // Intentionally left empty
            }
            catch (Exception e)
            {
                e.Should().BeOfType<OperationCanceledException>();
            }
        }

        [Test]
        public async Task TestFirstPage_Sorted_Asc()
        {
            // arrange
            var qviBreakdownService = new QVIBreakdownService(new JazzEntityFrameworkFactory(), null, null);
            var filters = new QVIBreakdownFilters()
            {
                IdentifiedSavings = 0,
                BreakdownIds = new List<string>(),
                ConfigurationGuid = new Guid("e96abe3e-1526-43ca-815e-ee30c5b34345")
            };

            var pagingOptions = new PagingOptions() { SortField = "QVICasesTotal", SortOrder = SortOrder.Asc };

            // act
            var taskResult = await qviBreakdownService
                .GetPagedAsync(pagingOptions, filters, CancellationToken.None);

            // assert
            taskResult.Data.Should().NotBeNullOrEmpty()
                .And.AllBeOfType<QVIBreakdown>()
                .And.HaveCountGreaterThan(1);
            taskResult.Data.First().QVICasesTotal
                .Should().BeLessThan(taskResult.Data.Last().QVICasesTotal);
        }

        [Test]
        public async Task TestFirstPage_Sorted_Desc()
        {
            // arrange
            var qviBreakdownService = new QVIBreakdownService(new JazzEntityFrameworkFactory(), null, null);
            var filters = new QVIBreakdownFilters()
            {
                IdentifiedSavings = 0,
                BreakdownIds = new List<string>(),
                ConfigurationGuid = new Guid("e96abe3e-1526-43ca-815e-ee30c5b34345")
            };

            var pagingOptions = new PagingOptions() { SortField = "QVICasesTotal", SortOrder = SortOrder.Desc };

            // act
            var taskResult = await qviBreakdownService
                .GetPagedAsync(pagingOptions, filters, CancellationToken.None);

            // assert
            taskResult.Data.Should().NotBeNullOrEmpty()
                .And.AllBeOfType<QVIBreakdown>()
                .And.HaveCountGreaterThan(1);
            taskResult.Data.First().QVICasesTotal
                .Should().BeGreaterThan(taskResult.Data.Last().QVICasesTotal);
        }

        [TestCaseSource(nameof(GetFilterData))]
        public void TestValidateFilters(QVIBreakdownFilters filters)
        {
            if (filters == null) return;
            if (filters.BreakdownIds.Any())
                filters.BreakdownIds.Should()
                    .AllBeOfType<string>()
                    .And.NotBeNullOrEmpty();
        }

        [TestCaseSource(typeof(JazzEntityFrameworkFactory), nameof(JazzEntityFrameworkFactory.GetFrameworksWithCancellation))]
        public async Task TestGetFilterOptionsAsync(JazzEntityFrameworkFactory jazzEntityFrameworkFactory, CancellationToken cancellationToken)
        {
            // arrange
            var qviBreakdownService = new QVIBreakdownService(jazzEntityFrameworkFactory, null, null);

            try
            {
                // act
                var taskResult = await qviBreakdownService
                    .GetFilterOptionsAsync(new Guid("e96abe3e-1526-43ca-815e-ee30c5b34345"), cancellationToken);

                // assert
                if (string.IsNullOrEmpty(jazzEntityFrameworkFactory.TestName))
                {
                    taskResult.Should().BeNull();
                    return;
                }
                taskResult.Should()
                    .BeOfType<QVIBreakdownFilterOptions>()
                    .And.NotBeNull();
                taskResult.Breakdowns.Should().AllBeOfType<FilterMember>().And.NotBeNullOrEmpty()
                    .And.NotContain(cd => string.IsNullOrEmpty(cd.Id))
                    .And.NotContain(cd => string.IsNullOrEmpty(cd.Text));
            }
            catch (NotImplementedException nie)
            {
                nie.Should().BeOfType<NotImplementedException>();
            }
            catch (Exception e)
            {
                e.Should().BeOfType<OperationCanceledException>();
            }
        }

        #region JazzDbService Tests

        [TestCaseSource(typeof(JazzEntityFrameworkFactory), nameof(JazzEntityFrameworkFactory.GetFrameworks))]
        public async Task TestGetAllAsync(JazzEntityFrameworkFactory jazzEntityFrameworkFactory)
        {
            // arrange
            var qviBreakdownService = new QVIBreakdownService(jazzEntityFrameworkFactory, null, null);

            // act
            var taskResult = await qviBreakdownService.GetAllAsync(CancellationToken.None);

            // assert
            if (string.IsNullOrEmpty(jazzEntityFrameworkFactory.TestName))
            {
                taskResult.Should().BeNullOrEmpty();
            }
            else
            {
                taskResult.Should().NotBeNullOrEmpty();
            }
        }

        [Test, Ignore("Broken due to removal of Key from VariationCaseType")]
        public async Task TestGetAllAsync_Filtered()
        {
            // arrange
            var factory = new JazzEntityFrameworkFactory();
            var filters = factory.QVIOpportunities;
            var qviBreakdownService = new QVIBreakdownService(factory, null, null);

            // act
            var taskResult = await qviBreakdownService.GetAllAsync(CancellationToken.None);

            // assert
            taskResult.Should().NotBeNullOrEmpty()
                .And.AllBeOfType<QVIBreakdown>()
                .And.HaveCountGreaterThan(0)
                .And.NotContain(o => string.IsNullOrEmpty(o.ToString()))
                .And.Contain(o => filters.Select(f => f.BreakdownName).Contains(o.BreakdownName))
                .And.Contain(o => filters.Select(f => f.ConfigurationGuid).Contains(o.ConfigurationGuid));
        }

        [TestCaseSource(typeof(JazzEntityFrameworkFactory), nameof(JazzEntityFrameworkFactory.GetFrameworks)), Ignore("Complex key issue")]
        public async Task TestGetById(JazzEntityFrameworkFactory jazzEntityFrameworkFactory)
        {
            // arrange
            var qviBreakdownService = new QVIBreakdownService(jazzEntityFrameworkFactory, null, null);
            var tempResult = await qviBreakdownService.GetAllAsync(CancellationToken.None);

            // act
            var taskResult =
                await qviBreakdownService.GetById(tempResult.FirstOrDefault()?.BreakdownId ?? 1, CancellationToken.None);

            // assert
            if (string.IsNullOrEmpty(jazzEntityFrameworkFactory.TestName))
            {
                taskResult.Should().BeNull();
            }
            else
            {
                taskResult.Should().NotBeNull()
                    .And.BeOfType<QVIBreakdown>();
            }

        }

        [TestCaseSource(typeof(JazzEntityFrameworkFactory), nameof(JazzEntityFrameworkFactory.GetFrameworks)), Ignore("Complex key issue")]
        public async Task TestGetByIds(JazzEntityFrameworkFactory jazzEntityFrameworkFactory)
        {
            // arrange
            var qviBreakdownService = new QVIBreakdownService(jazzEntityFrameworkFactory, null, null);
            var tempResult = await qviBreakdownService.GetAllAsync(CancellationToken.None);
            var ids = tempResult.Select(o => o.BreakdownId);

            // act
            var taskResult = await qviBreakdownService.GetByIds(ids, CancellationToken.None);

            // assert
            if (string.IsNullOrEmpty(jazzEntityFrameworkFactory.TestName))
            {
                taskResult.Should().BeNullOrEmpty();
            }
            else
            {
                taskResult.Should().NotBeNullOrEmpty()
                    .And.AllBeOfType<QVIBreakdown>();
            }

        }

        #endregion

        [TearDown]
        public void TestTearDown()
        {

            // Method intentionally left empty.

        }

        #region TestCaseData

        public static IEnumerable<TestCaseData> GetFilterData()
        {
            yield return new TestCaseData(new QVIBreakdownFilters { ConfigurationGuid = new Guid("e96abe3e-1526-43ca-815e-ee30c5b34345") }).SetName("No Filters");
            yield return new TestCaseData(new QVIBreakdownFilters { IdentifiedSavings = 1999, ConfigurationGuid = new Guid("e96abe3e-1526-43ca-815e-ee30c5b34345") }).SetName(
                "By Identified Savings");
            yield return new TestCaseData(new QVIBreakdownFilters { BreakdownIds = new[] { "1" }, ConfigurationGuid = new Guid("e96abe3e-1526-43ca-815e-ee30c5b34345") })
                .SetName("By Breakdown");
        }

        public static IEnumerable<TestCaseData> GetFrameworkWithFilterData()
        {
            var testCases = GetFilterData().ToList();
            var jeffs = JazzEntityFrameworkFactory.GetFrameworksWithCancellation()
                .Select(tcd => tcd.Arguments);
            foreach (var tcd in jeffs)
            {
                var jeff = (JazzEntityFrameworkFactory)tcd[0];
                var ct = (CancellationToken)tcd[1];
                foreach (var testCase in testCases)
                {
                    yield return new TestCaseData(jeff, testCase.Arguments.GetValue(0), ct)
                        .SetName($"{testCase.TestName} {(string.IsNullOrEmpty(jeff.TestName) ? "w/o Jeff" : "w/Jeff")}")
                        .SetCategory(jeff.TestName);
                }

            }
        }

        #endregion
    }
}