using FluentAssertions;
using Moq;
using NUnit.Framework;
using Strata.ContinuousImprovement.Biz.FiscalMonths;
using Strata.ContinuousImprovement.Biz.Generics;
using System;
using System.Collections.Generic;
using System.Linq;
using config = Strata.ContinuousImprovement.Biz.Configuration;

namespace Strata.ContinuousImprovement.Biz.Test.Unit.Configuration
{

    [TestFixture, Category("Unit")]
    public class ConfigurationTest
    {
        private IEnumerable<OpportunityTypes> excludedOpportTypes = new List<OpportunityTypes>()
        {
            OpportunityTypes.Blank,
            OpportunityTypes.Network
        };
        private IEnumerable<OpportunityTypes> OpportTypes { get; set; }

        [OneTimeSetUp]
        public void OneTimeSetup()
        {
            OpportTypes = Enum.GetValues(typeof(OpportunityTypes))
                .Cast<OpportunityTypes>()
                .Where(x => !excludedOpportTypes.Contains(x));
        }

        [TestCaseSource(nameof(ConfigTestCases))]
        public void TestConfiguration(string rollup, string ids, int breakdown,
            IEnumerable<int> configuredIds, string name, string plural)
        {
            var config = new config.Configuration
            {
                DepartmentRollupGlobalId = rollup,
                EntityIdsCSV = string.IsNullOrEmpty(rollup) ? "" : ids,
                CustomEntityIdsCSV = string.IsNullOrEmpty(rollup) ? ids : "",
                QVIOpportunityBreakdown = (Biz.Configuration.Configuration.QVIOpportunityBreakdowns)breakdown
            };
            config.ConfiguredEntityIds.Should().AllBeEquivalentTo(configuredIds);
            config.QVIOpportunityBreakdownEnum.Should().Be(breakdown);
            config.QVIOpportunityBreakdownName.Should().Be(name);
            config.QVIOpportunityBreakdownNamePlural.Should().Be(plural);
            config.ServiceLineDimensionGuid.Should().BeEmpty();
        }

        [TestCaseSource(nameof(StartEndDateTestCases))]
        public void TestGetBaselineStartDate(DateTime expectedStartDate, DateTime endDate)
        {
            var configuration = GetConfigurationByDate(endDate);
            var opportunityTypeIds = Enum.GetValues<OpportunityTypes>().Cast<byte>().ToList();
            foreach (var opType in OpportTypes.Where(t => opportunityTypeIds.Contains((byte)t)))
            {
                var actualStartDate = configuration.GetBaselineStartDate(opType);
                actualStartDate.Should().Be(expectedStartDate);
            }
        }

        [TestCaseSource(nameof(StartEndDateTestCases))]
        public void TestGetLastFiscalYearStartDate(DateTime expectedStartDate, DateTime endDate)
        {
            var configuration = GetConfigurationByDate(endDate, true);

            var actualStartDate = configuration.GetLastFiscalYearStartDate();
            expectedStartDate = expectedStartDate.AddYears(-1);
            actualStartDate.Should().Be(expectedStartDate);
        }

        [TestCaseSource(nameof(StartEndDateTestCases))]
        public void TestGetFiscalYearStartDate(DateTime expectedStartDate, DateTime endDate)
        {
            var configuration = GetConfigurationByDate(endDate, true);

            var actualStartDate = configuration.GetFiscalYearStartDate();
            actualStartDate.Should().Be(expectedStartDate);
        }

        [TestCaseSource(nameof(TrackingCurrentMonthEndDateTestCases))]
        public void TestTrackingCurrentMonthEndDate(
            OpportunityTypes opportunityType,
            DateTime trackingCurrentMonth,
            DateTime expectedEndDate)
        {
            var configuration = GetConfigurationWithTrackingMonth(trackingCurrentMonth, opportunityType);

            var actualEndDate = configuration.TrackingCurrentMonthEndDate(opportunityType);

            actualEndDate.Should().Be(expectedEndDate);
            actualEndDate.Hour.Should().Be(0);
            actualEndDate.Minute.Should().Be(0);
            actualEndDate.Second.Should().Be(0);
        }

        [TestCaseSource(nameof(TrackingCurrentMonthEndDateTestCases))]
        public void TestGetTrackingCurrentMonthEndDate(
            OpportunityTypes opportunityType,
            DateTime trackingCurrentMonth,
            DateTime expectedEndDate)
        {
            var configuration = GetConfigurationWithTrackingMonth(trackingCurrentMonth, opportunityType);

            var actualEndDate = configuration.GetTrackingCurrentMonthEndDate(opportunityType);

            actualEndDate.Should().Be(expectedEndDate.AddDays(-1));
        }

        #region Configuration Test Cases

        private static IEnumerable<TestCaseData> ConfigTestCases()
        {
            yield return new TestCaseData("Rollup", "1,2,3,4", 4,
                    new[] { 1, 2, 3, 4 }, "Breakdown", "Breakdowns")
                .SetName("Default With Rollup");
            yield return new TestCaseData("", "1,2,3,4", 4,
                    new[] { 1, 2, 3, 4 }, "Breakdown", "Breakdowns")
                .SetName("Default w/o Rollup");
            yield return new TestCaseData("Rollup", "1,2,3,4",
                    (int)config.Configuration.QVIOpportunityBreakdowns.Entity,
                    new[] { 1, 2, 3, 4 }, "Entity", "Entities")
                .SetName("Entity With Rollup");
            yield return new TestCaseData("", "1,2,3,4",
                    (int)config.Configuration.QVIOpportunityBreakdowns.Entity,
                    new[] { 1, 2, 3, 4 }, "Entity", "Entities")
                .SetName("Entity w/o Rollup");
            yield return new TestCaseData("Rollup", "1,2,3,4",
                    (int)config.Configuration.QVIOpportunityBreakdowns.ServiceLine,
                    new[] { 1, 2, 3, 4 }, "Service Line", "Service Lines")
                .SetName("Service Line With Rollup");
            yield return new TestCaseData("", "1,2,3,4",
                    (int)config.Configuration.QVIOpportunityBreakdowns.ServiceLine,
                    new[] { 1, 2, 3, 4 }, "Service Line", "Service Lines")
                .SetName("Service Line w/o Rollup");
            yield return new TestCaseData("Rollup", "1,2,3,4",
                    (int)config.Configuration.QVIOpportunityBreakdowns.PhysicianSpecialty,
                    new[] { 1, 2, 3, 4 }, "Physician Specialty", "Physician Specialties")
                .SetName("Physician Specialty With Rollup");
            yield return new TestCaseData("", "1,2,3,4",
                    (int)config.Configuration.QVIOpportunityBreakdowns.PhysicianSpecialty,
                    new[] { 1, 2, 3, 4 }, "Physician Specialty", "Physician Specialties")
                .SetName("Physician Specialty w/o Rollup");
        }

        private static IEnumerable<TestCaseData> StartEndDateTestCases()
        {
            yield return new TestCaseData(new DateTime(2023, 3, 1), new DateTime(2024, 2, 29));
            yield return new TestCaseData(new DateTime(2024, 3, 1), new DateTime(2025, 2, 28));
        }

        private static IEnumerable<TestCaseData> TrackingCurrentMonthEndDateTestCases()
        {
            yield return new TestCaseData(
                OpportunityTypes.ChargeCode,
                new DateTime(2024, 3, 15),
                new DateTime(2024, 4, 1))
                .SetName("ChargeCode - March 2024");

            yield return new TestCaseData(
                OpportunityTypes.QualityVariation,
                new DateTime(2024, 6, 20),
                new DateTime(2024, 7, 1))
                .SetName("QualityVariation - June 2024");

            yield return new TestCaseData(
                OpportunityTypes.Variation,
                new DateTime(2024, 12, 5),
                new DateTime(2025, 1, 1))
                .SetName("Variation - December 2024");

            yield return new TestCaseData(
                OpportunityTypes.OrgDefined,
                new DateTime(2024, 2, 10),
                new DateTime(2024, 3, 1))
                .SetName("OrgDefined - February 2024");

            yield return new TestCaseData(
                OpportunityTypes.Exploration,
                new DateTime(2024, 1, 31),
                new DateTime(2024, 2, 1))
                .SetName("Exploration - January 2024");

            yield return new TestCaseData(
                OpportunityTypes.ChargeCode,
                new DateTime(2024, 2, 29),
                new DateTime(2024, 3, 1))
                .SetName("ChargeCode - Leap Year February");
        }

        #endregion

        #region Utils

        private static config.Configuration GetConfigurationByDate(DateTime date, bool isFiscalMonthResolver = false)
        {
            var configuration = new config.Configuration
            {
                FiscalYearID = (short)date.Year,
                OrgDefinedEndDate = date,
                VariationEndDate = date,
                QualityVariationEndDate = date
            };

            if (isFiscalMonthResolver)
            {
                var lastFiscalMonth = new FiscalMonth
                {
                    FiscalMonthId = (byte)date.Month
                };
                var fmr = Mock.Of<IFiscalMonthResolver>();
                Mock.Get(fmr)
                    .Setup(s => s.LastFiscalMonth())
                    .Returns(() => lastFiscalMonth);
                configuration.FiscalMonthResolver = fmr;
            }
            return configuration;
        }

        private static config.Configuration GetConfigurationWithTrackingMonth(
            DateTime trackingCurrentMonth,
            OpportunityTypes opportunityType)
        {
            var configuration = new config.Configuration();

            switch (opportunityType)
            {
                case OpportunityTypes.ChargeCode:
                    configuration.OrgDefinedTrackingCurrentMonth = trackingCurrentMonth;
                    break;
                case OpportunityTypes.QualityVariation:
                    configuration.QualityVariationTrackingCurrentMonth = trackingCurrentMonth;
                    break;
                default:
                    configuration.VariationTrackingCurrentMonth = trackingCurrentMonth;
                    break;
            }

            return configuration;
        }

        #endregion
    }
}