using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using LCU.API.Internal.RepoApi.Models.Old_Repo_Models;
using LCU.API.Internal.RepoApi.Old_Repo_Exceptions;
using LCU.API.Internal.RepoApi.Repos.Exceptions;
using LCU.API.Internal.RepoApi.Repos.Models;
using LCU.API.Internal.RepoApi.Repos.Repositories;
using LCU.API.Internal.RepoApi.Old_Repo_Services;
using Moq;
using Xunit;

namespace LCU.API.Internal.RepoApiTests.ServiceTests
{
    public class EventAlertServiceTests
    {
        private readonly Mock<IEventAlertRepository> _eventAlertRepositoryMock;
        private readonly Mock<IUnitOfWork> _unitOfWorkMock;
        private readonly Mock<IRepoAccountRepository> _accountRepositoryMock;
        private readonly EventAlertService _service;

        public EventAlertServiceTests()
        {
            _eventAlertRepositoryMock = new Mock<IEventAlertRepository>();
            _unitOfWorkMock = new Mock<IUnitOfWork>();
            _accountRepositoryMock = new Mock<IRepoAccountRepository>();
            _service = new EventAlertService(
                _eventAlertRepositoryMock.Object,
                _unitOfWorkMock.Object,
                _accountRepositoryMock.Object);
        }

        [Fact]
        public async Task ListAll_ShouldReturnAllEventAlerts()
        {
            // Arrange
            var eventAlerts = new List<EventAlert> { new EventAlert { Id = 1 }, new EventAlert { Id = 2 } };
            _eventAlertRepositoryMock.Setup(repo => repo.ListAllAsync()).ReturnsAsync(eventAlerts);

            // Act
            var result = await _service.ListAll();

            // Assert
            Assert.Equal(eventAlerts, result);
        }

        [Fact]
        public async Task ListAll_ShouldThrowServerErrorException_OnException()
        {
            // Arrange
            _eventAlertRepositoryMock.Setup(repo => repo.ListAllAsync()).ThrowsAsync(new Exception());

            // Act & Assert
            await Assert.ThrowsAsync<ServerErrorException>(() => _service.ListAll());
        }

        [Fact]
        public async Task ListUnread_ShouldReturnUnreadEventAlerts()
        {
            // Arrange
            var unreadAlerts = new List<EventAlert> { new EventAlert { Id = 1 } };
            _eventAlertRepositoryMock.Setup(repo => repo.ListUnreadAsync()).ReturnsAsync(unreadAlerts);

            // Act
            var result = await _service.ListUnread();

            // Assert
            Assert.Equal(unreadAlerts, result);
        }

        [Fact]
        public async Task ListUnread_ShouldThrowServerErrorException_OnException()
        {
            // Arrange
            _eventAlertRepositoryMock.Setup(repo => repo.ListUnreadAsync()).ThrowsAsync(new Exception());

            // Act & Assert
            await Assert.ThrowsAsync<ServerErrorException>(() => _service.ListUnread());
        }

        [Fact]
        public async Task ListWithinDateRange_ShouldReturnAlertsWithinDateRange()
        {
            // Arrange
            var start = DateTime.Now.AddDays(-1);
            var end = DateTime.Now;
            var alerts = new List<EventAlert> { new EventAlert { Id = 1 } };
            _eventAlertRepositoryMock.Setup(repo => repo.ListWithinDateRangeAsync(start, end)).ReturnsAsync(alerts);

            // Act
            var result = await _service.ListWithinDateRange(start, end);

            // Assert
            Assert.Equal(alerts, result);
        }

        [Fact]
        public async Task ListWithinDateRange_ShouldThrowServerErrorException_OnException()
        {
            // Arrange
            var start = DateTime.Now.AddDays(-1);
            var end = DateTime.Now;
            _eventAlertRepositoryMock.Setup(repo => repo.ListWithinDateRangeAsync(start, end)).ThrowsAsync(new Exception());

            // Act & Assert
            await Assert.ThrowsAsync<ServerErrorException>(() => _service.ListWithinDateRange(start, end));
        }

        [Fact]
        public async Task SaveAsync_ShouldSaveEventAlert()
        {
            // Arrange
            var eventAlert = new EventAlert { RepoId = 1, AccountNo = "123" };
            _accountRepositoryMock.Setup(repo => repo.FindByIdAsync(eventAlert.RepoId.Value))
                .ReturnsAsync(new RepoAccount { Status = "ACTIVE" });

            // Act
            var result = await _service.SaveAsync(eventAlert);

            // Assert
            _eventAlertRepositoryMock.Verify(repo => repo.AddAsync(eventAlert), Times.Once);
            _unitOfWorkMock.Verify(uow => uow.CompleteAsync(), Times.Once);
            Assert.Equal(eventAlert, result);
        }

        [Fact]
        public async Task SaveAsync_ShouldThrowUnwantedStatusException_WhenStatusIsCancelledOrRedeemed()
        {
            // Arrange
            var eventAlert = new EventAlert { RepoId = 1, AccountNo = "123" };
            _accountRepositoryMock.Setup(repo => repo.FindByIdAsync(eventAlert.RepoId.Value))
                .ReturnsAsync(new RepoAccount { Status = "REDEEMED" });

            // Act & Assert
            await Assert.ThrowsAsync<UnwantedStatusException>(() => _service.SaveAsync(eventAlert));
        }

        [Fact]
        public async Task SaveAsync_ShouldThrowServerErrorException_OnException()
        {
            // Arrange
            var eventAlert = new EventAlert { RepoId = 1, AccountNo = "123" };
            _accountRepositoryMock.Setup(repo => repo.FindByIdAsync(eventAlert.RepoId.Value))
                .ThrowsAsync(new Exception());

            // Act & Assert
            await Assert.ThrowsAsync<ServerErrorException>(() => _service.SaveAsync(eventAlert));
        }

        [Fact]
        public async Task DeleteAsync_ShouldDeleteEventAlert()
        {
            // Arrange
            var eventAlert = new EventAlert { Id = 1 };
            _eventAlertRepositoryMock.Setup(repo => repo.FindByIdAsync(eventAlert.Id)).ReturnsAsync(eventAlert);

            // Act
            var result = await _service.DeleteAsync(eventAlert.Id);

            // Assert
            _eventAlertRepositoryMock.Verify(repo => repo.Remove(eventAlert), Times.Once);
            _unitOfWorkMock.Verify(uow => uow.CompleteAsync(), Times.Once);
            Assert.Equal(eventAlert, result);
        }

        [Fact]
        public async Task DeleteAsync_ShouldThrowNotFoundException_WhenEventAlertNotFound()
        {
            // Arrange
            _eventAlertRepositoryMock.Setup(repo => repo.FindByIdAsync(It.IsAny<int>())).ReturnsAsync((EventAlert)null);

            // Act & Assert
            await Assert.ThrowsAsync<NotFoundException>(() => _service.DeleteAsync(1));
        }

        [Fact]
        public async Task DeleteAsync_ShouldThrowServerErrorException_OnException()
        {
            // Arrange
            _eventAlertRepositoryMock.Setup(repo => repo.FindByIdAsync(It.IsAny<int>())).ThrowsAsync(new Exception());

            // Act & Assert
            await Assert.ThrowsAsync<ServerErrorException>(() => _service.DeleteAsync(1));
        }
    }
}