using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using AutoMapper;
using Moq;
using NUnit.Framework;
using Strata.Analytics.Biz.DbContexts;
using Strata.Analytics.Biz.Extracts.Models;
using Strata.Analytics.Biz.Extracts.Services;
using Strata.Analytics.Biz.Hangfire;
using Strata.Analytics.Biz.Utils;
using Strata.Analytics.Test.Unit.Biz.TestData;
using Strata.CoreLib.Claims;
using Strata.CoreLib.Claims.Extensions;
using Strata.Testing.Categories;

namespace Strata.Analytics.Test.Unit.Biz.Extracts
{
    [Category(TestCategory.Unit)]
    [Parallelizable(ParallelScope.None)]
    public class ExtractScheduleTests
    {
        private IClaimsPrincipalAccessor _claimsPrincipalAccessor;
        private AnalyticsDbContext _dbContext;
        private IMapper _mapper;
        private IExtractScheduleService _scheduleService;
        private Mock<IRecurringJobService> _recurringJobService;
        private string _userTimeZone;
        private static readonly DateTime Now = DateTime.Now;
        private static readonly DateOnly NowDate = new(Now.Year, Now.Month, Now.Day);
        private static readonly TimeOnly NowTime = new(Now.Hour, Now.Minute);

        [OneTimeSetUp]
        public void OneTimeSetup()
        {
            _claimsPrincipalAccessor = IClaimsPrincipalAccessorMock.GetClaimsPrincipalAccessor(5, true);
            _dbContext = AnalyticsDbContextMock.GetAnalyticsDbContext(_claimsPrincipalAccessor);
            _mapper = AutoMapperMock.GetAutoMapper();
            _recurringJobService = new Mock<IRecurringJobService>();
            _scheduleService = new ExtractScheduleService(_dbContext, _claimsPrincipalAccessor, _mapper, _recurringJobService.Object);
            _dbContext.Extracts.AddRange(ExtractTestData.Extracts());
            _dbContext.ExtractSchedule.AddRange(ExtractTestData.ExtractSchedules());
            _dbContext.SaveChanges();
            _userTimeZone = _claimsPrincipalAccessor.GetTimezone();
        }

        [OneTimeTearDown]
        public async Task OneTimeTearDown()
        {
            await _dbContext.Database.EnsureDeletedAsync();
        }

        
        [Test]
        public async Task CanCreate_And_Add_RecurringJob()
        {
            var now = DateTime.UtcNow;
            // arrange
            var saveInfo = new ExtractScheduleSaveInfo
            {
                ExtractId = 1,
                Enabled = true,
                Repeater = ScheduleRepeaterType.Daily,
                OnDays = "",
                StartDate = NowDate,
                StartTime = NowTime,
                MaxOccurrences = 12
            };

            // act
            var result = await _scheduleService.CreateAsync(saveInfo, CancellationToken.None);

            // assert
            Assert.IsNotNull(result);
            Assert.That(result.ExtractScheduleId, Is.GreaterThan(ExtractTestData.ExtractSchedules().Max(h => h.ExtractScheduleId)));
            Assert.That(result.ExtractId, Is.EqualTo(saveInfo.ExtractId));
            Assert.That(result.Enabled, Is.EqualTo(saveInfo.Enabled));
            Assert.That(result.ToCronString(), Is.EqualTo($"{NowTime.Minute} {NowTime.Hour} * * *"));  // utc to CST conversion
            Assert.That(result.StartDate, Is.EqualTo(saveInfo.StartDate));
            Assert.IsNull(result.EndDate);
            Assert.That(result.CreatedByUserGuid, Is.EqualTo(_claimsPrincipalAccessor.GetCurrentClaimsPrincipal().GetUserGuid()));
            Assert.That(result.UpdatedByUserGuid, Is.EqualTo(_claimsPrincipalAccessor.GetCurrentClaimsPrincipal().GetUserGuid()));
            Assert.IsNotNull(result.CreatedDate);
            Assert.IsNotNull(result.UpdatedDate);

            _recurringJobService.Verify(
                s => s.AddOrUpdateExtractExportJobAsync(It.Is<ExtractExportRequest>(r =>
                    r.ExtractScheduleId == result.ExtractScheduleId && r.ExtractId == result.ExtractId &&
                    r.Cron == result.ToCronString()), It.IsAny<CancellationToken>()), Times.Once);

        }


        [Test]
        public async Task CanGetById()
        {
            // act
            var result = await _scheduleService.GetByIdAsync(1, CancellationToken.None);

            // assert
            Assert.IsNotNull(result);
        }


        [Test]
        public async Task CanUpdate()
        {
            // arrange
            var scheduleId = _dbContext.ExtractSchedule.First(s => s.MaxOccurrences.HasValue).ExtractId;

            var schedule = await _scheduleService.GetByIdAsync(scheduleId, CancellationToken.None);

            var saveInfo = new ExtractScheduleSaveInfo();
            _mapper.Map(schedule, saveInfo);

            saveInfo.EndDate = NowDate.AddYears(1);
            saveInfo.MaxOccurrences = null;
            saveInfo.Repeater = ScheduleRepeaterType.Monthly;
            saveInfo.OnDays = "";
            _dbContext.ChangeTracker.Clear();
            
            // act
            var result = await _scheduleService.UpdateAsync(schedule.ExtractId, saveInfo, CancellationToken.None);

            // assert
            Assert.IsNotNull(result);
            Assert.That(result.ExtractId, Is.EqualTo(schedule.ExtractId));
            Assert.That(result.EndDate, Is.EqualTo(saveInfo.EndDate));
            Assert.IsNull(result.MaxOccurrences);
            Assert.That(result.ToCronString(), Is.EqualTo($"{schedule.StartTime.Minute} {schedule.StartTime.Hour} {schedule.StartDate.Day} * *"));
            Assert.That(result.CreatedByUserGuid, Is.EqualTo(schedule.CreatedByUserGuid));
            Assert.That(result.UpdatedByUserGuid, Is.EqualTo(_claimsPrincipalAccessor.GetCurrentClaimsPrincipal().GetUserGuid()));
            Assert.That(result.CreatedDate, Is.EqualTo(schedule.CreatedDate));
            Assert.That(result.UpdatedDate, Is.EqualTo(DateTimeOffset.UtcNow).Within(500).Milliseconds); // this could fail in debug
        }

        [Test]
        public async Task CanGetAll_FilterNotEnabled()
        {
            // arrange
            var now = DateTime.UtcNow;
            // arrange
            var saveInfo = new ExtractScheduleSaveInfo
            {
                ExtractId = 1,
                Enabled = false,
                Repeater = ScheduleRepeaterType.Daily,
                OnDays = "",
                StartDate = NowDate,
                StartTime = NowTime,
                MaxOccurrences = 12
            };

            var disabledSchedule = await _scheduleService.CreateAsync(saveInfo, CancellationToken.None);

            // act
            var result = (await _scheduleService.GetAllAsync(CancellationToken.None)).ToList();

            // assert
            Assert.IsNotNull(result);
            Assert.That(result.Count, Is.GreaterThan(0));
            Assert.IsFalse(result.Select(s => s.ExtractScheduleId).Contains(disabledSchedule.ExtractScheduleId));
            Assert.IsTrue(result.TrueForAll(s => s.Enabled));
        }


        [Test]
        public async Task Disabling_Removes_RecurringJob()
        {
            // arrange
            var scheduleId = _dbContext.ExtractSchedule.Last(s => s.Enabled).ExtractId;

            var schedule = await _scheduleService.GetByIdAsync(scheduleId, CancellationToken.None);

            var saveInfo = new ExtractScheduleSaveInfo();
            _mapper.Map(schedule, saveInfo);

            saveInfo.Enabled = false;
            _dbContext.ChangeTracker.Clear();

            // act
            await _scheduleService.UpdateAsync(schedule.ExtractId, saveInfo, CancellationToken.None);

            // assert

            _recurringJobService.Verify(
                s => s.RemoveExtractExportJobAsync(It.IsAny<int>(), It.Is<int>(r => r == schedule.ExtractScheduleId),
                    It.IsAny<CancellationToken>()), Times.Once);

        }

        [Test]
        public async Task HittingMaxOccurrenceLimit_Removes_RecurringJob()
        {
            var now = DateTime.UtcNow;
            // arrange
            var saveInfo = new ExtractScheduleSaveInfo
            {
                ExtractId = 1,
                Enabled = true,
                Repeater = ScheduleRepeaterType.Daily,
                OnDays = "",
                StartDate = NowDate.AddDays(-7), // starting 7 days ago
                StartTime = NowTime,
                MaxOccurrences = 6 // run a total of 6 times
            };

            var schedule = await _scheduleService.CreateAsync(saveInfo, CancellationToken.None);
            _dbContext.ChangeTracker.Clear();

            // act
            var result = await _scheduleService.UpdateLastOccurrence(schedule.ExtractScheduleId, DateTimeOffset.UtcNow,
                _userTimeZone, CancellationToken.None);

            // assert
            Assert.That(result.Enabled, Is.EqualTo(false));

            _recurringJobService.Verify(
                s => s.RemoveExtractExportJobAsync(It.IsAny<int>(), It.Is<int>(r => r == schedule.ExtractScheduleId),
                    It.IsAny<CancellationToken>()), Times.Once);

        }
        
        [Test]
        public async Task HittingEndDateLimit_Removes_RecurringJob()
        {
            var now = DateTime.UtcNow;
            // arrange
            var saveInfo = new ExtractScheduleSaveInfo
            {
                ExtractId = 1,
                Enabled = true,
                Repeater = ScheduleRepeaterType.Daily,
                OnDays = "",
                StartDate = NowDate.AddDays(-7), // starting 7 days ago
                StartTime = NowTime,
                EndDate = NowDate // run until today
            };

            var schedule = await _scheduleService.CreateAsync(saveInfo, CancellationToken.None);
            _dbContext.ChangeTracker.Clear();

            // act
            var result = await _scheduleService.UpdateLastOccurrence(schedule.ExtractScheduleId, DateTimeOffset.UtcNow,
                _userTimeZone, CancellationToken.None);

            // assert
            Assert.That(result.Enabled, Is.EqualTo(false));

            _recurringJobService.Verify(
                s => s.RemoveExtractExportJobAsync(It.IsAny<int>(), It.Is<int>(r => r == schedule.ExtractScheduleId),
                    It.IsAny<CancellationToken>()), Times.Once);

        }

        [Test]
        public async Task CanDelete_And_Remove_RecurringJob()
        {
            var now = DateTime.UtcNow;
            // arrange
            var saveInfo = new ExtractScheduleSaveInfo
            {
                ExtractId = 1,
                Enabled = true,
                Repeater = ScheduleRepeaterType.Daily,
                OnDays = "",
                StartDate = NowDate.AddDays(-7), // starting 7 days ago
                StartTime = NowTime,
            };

            var schedule = await _scheduleService.CreateAsync(saveInfo, CancellationToken.None);
            _dbContext.ChangeTracker.Clear();

            // act
            await _scheduleService.DeleteAsync(schedule.ExtractScheduleId, CancellationToken.None);

            // assert
            var result = await _scheduleService.ContainsAsync(schedule.ExtractScheduleId, CancellationToken.None);

            Assert.That(result, Is.EqualTo(false));

            _recurringJobService.Verify(
                s => s.RemoveExtractExportJobAsync(It.IsAny<int>(), It.Is<int>(r => r == schedule.ExtractScheduleId),
                    It.IsAny<CancellationToken>()), Times.Once);

        }

        [Test]
        public void CanGetDailyCronFromSchedule()
        {
            // arrange
            var schedule = new ExtractSchedule
            {
                Repeater = ScheduleRepeaterType.Daily,
                OnDays = "",
                StartDate = new DateOnly(2023, 01, 01),
                StartTime = new TimeOnly(15, 30, 00)
            };

            // assert

            Assert.That(schedule.ToCronString(), Is.EqualTo("30 15 * * *"));
        }


        [Test]
        public void CanGetWeekdayCronFromSchedule()
        {
            // arrange
            var schedule = new ExtractSchedule
            {
                Repeater = ScheduleRepeaterType.Weekdays,
                StartDate = new DateOnly(2023, 01, 01),
                StartTime = new TimeOnly(15, 30, 00)
            };

            // assert

            Assert.That(schedule.ToCronString(), Is.EqualTo("30 15 * * MON-FRI"));
        }

        [TestCase("MON,WED,FRI")]
        [TestCase("SUN,SAT")]
        [TestCase("SUN,THU")]
        public void CanGetWeeklyCronFromSchedule(string onDays)
        {
            // arrange
            var schedule = new ExtractSchedule
            {
                Repeater = ScheduleRepeaterType.Weekly,
                OnDays = onDays,
                StartDate = new DateOnly(2023, 01, 01),
                StartTime = new TimeOnly(15, 30, 00)
            };

            // assert

            Assert.That(schedule.ToCronString(),
                onDays == string.Empty
                    ? Is.EqualTo("30 15 * * *")
                    : Is.EqualTo($"30 15 * * {onDays}"));
        }

        [Test]
        public void CanGetMonthlyCronFromSchedule()
        {
            // arrange
            var schedule = new ExtractSchedule
            {
                Repeater = ScheduleRepeaterType.Monthly,
                OnDays = "",
                StartDate = new DateOnly(2023, 01, 01),
                StartTime = new TimeOnly(15, 30, 00)
            };

            // assert

            Assert.That(schedule.ToCronString(), Is.EqualTo("30 15 1 * *"));
        }
    }
}