using System;
using System.Net.Http;
using LCU.API.Collections.RepoApi.Exceptions;
using LCU.API.Collections.RepoApi.Services;
using LCU.Shared.Collections.RepoApiLib.Models;
using LCU.Shared.Collections.RepoApiLib.Repositories;
using Moq;
using Xunit;

namespace LCU.API.Collections.RepoApiTests.Services
{
    public class RefundStatusServiceTest
    {
        private IRefundStatusService _refundStatusService;
        private Mock<IRefundStatusRepository> _refundStatusRepository;
        private Mock<IUnitOfWork> _unitOfWork;
        private Mock<IRepoAccountService> _repoAccountService;
        private Mock<IEmailer> _emailer;

        public RefundStatusServiceTest()
        {
            _refundStatusRepository = new Mock<IRefundStatusRepository>();
            _unitOfWork = new Mock<IUnitOfWork>();
            _repoAccountService = new Mock<IRepoAccountService>();
            _emailer = new Mock<IEmailer>();
            _refundStatusService = new RefundStatusService(
                _refundStatusRepository.Object,
                _unitOfWork.Object,
                _repoAccountService.Object,
                _emailer.Object);
        }

        [Fact]
        public async void GetAsync_Ok()
        {
            // Arrange
            _refundStatusRepository.Setup(repo => repo.FindByRepoIdAsync(It.IsAny<int>())).ReturnsAsync(
                new RefundStatus());

            // Act
            var result = await _refundStatusService.GetAsync(1);

            // Assert
            Assert.NotNull(result);
        }

        [Fact]
        public async void GetAsync_Throws_NFE_When_RefundStatusRepository_Throws_Exception()
        {
            // Arrange
            _refundStatusRepository.Setup(repo => repo.FindByRepoIdAsync(It.IsAny<int>())).ThrowsAsync(
                new Exception());

            // Act / Assert
            try
            {
                var result = await _refundStatusService.GetAsync(1);
                Assert.True(false, "An Exception in the RefundStatusRepository should have triggered an Exception upward. No Exception triggered.");
            }
            catch (NotFoundException) { }
            catch (Exception)
            {
                Assert.True(false, "A NotFoundException should be thrown when any Exception occurs in RefundStatusRepository. Another Exception was thrown instead.");
            }
        }

        [Fact]
        public async void GetAsync_Throws_NFE_When_RefundStatusRepository_Returns_Null()
        {
            // Arrange
            _refundStatusRepository.Setup(repo => repo.FindByRepoIdAsync(It.IsAny<int>())).ReturnsAsync((RefundStatus) null);

            // Act / Assert
            try
            {
                var result = await _refundStatusService.GetAsync(1);
                Assert.True(false, "An Exception should have been thrown when the RefundStatusRepository returns a null value. No Exception triggered.");
            }
            catch (NotFoundException) { }
            catch (Exception)
            {
                Assert.True(false, "A NotFoundException should be thrown when the RefundStatusRepository returns a null value. Another Exception was thrown instead.");
            }
        }

        [Fact]
        public async void SaveASync_Ok()
        {
            // Arrange
            _refundStatusRepository.Setup(repo => repo.AddAsync(It.IsAny<RefundStatus>())).ReturnsAsync(
                new RefundStatus());

            // Act
            var result = await _refundStatusService.SaveAsync(new RefundStatus()
            {
                RepoId = 123
            });

            // Assert
            Assert.NotNull(result);
        }

        [Fact]
        public async void SaveAsynhc_Throws_Exception_When_RepoAccountService_Throws_Exception()
        {
            // Arrange
            _repoAccountService.Setup(service => service.Get(It.IsAny<int>())).ThrowsAsync(
                new Exception());

            // Act / Assert
            try
            {
                var result = await _refundStatusService.SaveAsync(new RefundStatus() { RepoId = 123 });
                Assert.True(false, "An Exception in the RefundStatusRepository should have triggered an Exception upward. No Exception triggered.");
            }
            catch (Exception) { }
        }

        [Fact]
        public async void UpdateAsync_Ok()
        {
            // Arrange
            _refundStatusRepository.Setup(repo => repo.FindByRepoIdAsync(It.IsAny<int>())).ReturnsAsync(
                new RefundStatus());
            _repoAccountService.Setup(service => service.Get(It.IsAny<int>())).ReturnsAsync(
                new RepoAccount());

            // Act
            var result = await _refundStatusService.UpdateAsync(new RefundStatus()
            {
                RepoId = 123
            });

            // Assert
            Assert.NotNull(result);
        }

        [Fact]
        public async void UpdateAsync_With_Refunds_Received_Date_Sends_Email()
        {
            // Arrange
            _refundStatusRepository.Setup(repo => repo.FindByRepoIdAsync(It.IsAny<int>())).ReturnsAsync(
                new RefundStatus());
            _repoAccountService.Setup(service => service.Get(It.IsAny<int>())).ReturnsAsync(
                new RepoAccount());
            _emailer.Setup(emailer => emailer.SendSurplusDeficiencyLetterEmailAsync(It.IsAny<RepoAccount>())).ReturnsAsync(new HttpResponseMessage(System.Net.HttpStatusCode.OK));

            // Act
            var result = await _refundStatusService.UpdateAsync(new RefundStatus()
            {
                RepoId = 123,
                RefundsReceivedDate = DateTime.Now
            });

            // Assert
            Assert.NotNull(result);
            Assert.NotNull(result.RefundsReceivedDate);
            _emailer.Verify(x => x.SendSurplusDeficiencyLetterEmailAsync(It.IsAny<RepoAccount>()), Times.Once);
        }

        [Fact]
        public async void UpdateAsync_Returns_NFE_When_RefundStatusRepository_Throws_NFE()
        {
            // Act / Assert
            try
            {
                await _refundStatusService.UpdateAsync(new RefundStatus()
                {
                    RepoId = 123
                });
                Assert.True(false, "A Failure to Find a RefundStatus should have sent an Exception upward. No Exception triggered.");
            }
            catch (NotFoundException) { }
            catch (Exception)
            {
                Assert.True(false, "A Failure to Find a RefundStatus should have trigerred a NotFoundException. Another Exception was thrown instead.");
            }
        }
    }
}