using MesaFabApproval.API.Services;
using MesaFabApproval.Models;
using MesaFabApproval.Shared.Models;
using Microsoft.Extensions.Caching.Memory;
using Microsoft.Extensions.Logging;
using Moq;

using System.Net.Mail;

namespace MesaFabApproval.API.Test;
public class PCRBServiceTests
{
    private readonly Mock<ILogger<PCRBService>> _loggerMock;
    private readonly Mock<IDalService> _dalServiceMock;
    private Mock<IMemoryCache> _cacheMock;
    private readonly Mock<IUserService> _userServiceMock;
    private readonly Mock<IApprovalService> _approvalServiceMock;
    private readonly Mock<ISmtpService> _smtpServiceMock;
    private PCRBService _pcrbService;

    private static IEnumerable<PCRB> PCRBS = new List<PCRB>() {
        new PCRB {
            PlanNumber = 1,
            OwnerID = 1,
            Title = "Test Title",
            ChangeLevel = "Level 1",
            ReasonForChange = "Test Reason",
            ChangeDescription = "Test Description",
            IsITAR = false,
            CurrentStep = 1,
            InsertTimeStamp = DateTime.Now,
            LastUpdateDate = DateTime.Now,
            Type = "Type 1"
        }
    };

    private static IEnumerable<PCRBFollowUp> FOLLOW_UPS = new List<PCRBFollowUp>() {
        new PCRBFollowUp { ID = 1, PlanNumber = 1, Step = 1, FollowUpDate = DateTime.Now }
    };

    private static AppSettings appSettings = new AppSettings(
        Company: "Infineon",
        DbConnectionString: "connectionString",
        JwtAudience: "audience",
        JwtIssuer: "issuer",
        JwtKey: "key",
        MrbAttachmentPath: "mrbAttachmentPath",
        PcrbAttachmentPath: "pcrbAttachmentPath",
        ShouldSendEmail: false,
        SiteBaseUrl: "siteBaseUrl",
        WorkingDirectoryName: "workingDirectoryName"
    );

    public PCRBServiceTests()
    {
        _loggerMock = new Mock<ILogger<PCRBService>>();
        _dalServiceMock = new Mock<IDalService>();
        _userServiceMock = new Mock<IUserService>();
        _approvalServiceMock = new Mock<IApprovalService>();
        _smtpServiceMock = new Mock<ISmtpService>();
        _cacheMock = MockMemoryCacheService.GetMemoryCache(FOLLOW_UPS);

        _pcrbService = new PCRBService(
            _loggerMock.Object,
            _dalServiceMock.Object,
            _cacheMock.Object,
            _userServiceMock.Object,
            _approvalServiceMock.Object,
            _smtpServiceMock.Object,
            appSettings
        );
    }

    [Fact]
    public async Task CreateNewPCRB_WithValidParam_ShouldCreatePCRB()
    {
        var pcrb = new PCRB
        {
            OwnerID = 1,
            Title = "Test Title",
            ChangeLevel = "Level 1",
            ReasonForChange = "Test Reason",
            ChangeDescription = "Test Description",
            IsITAR = false,
            CurrentStep = 1,
            InsertTimeStamp = DateTime.Now,
            LastUpdateDate = DateTime.Now,
            Type = "Type 1"
        };

        _dalServiceMock.Setup(d => d.ExecuteAsync(It.IsAny<string>(), pcrb))
            .ReturnsAsync(1);

        await _pcrbService.CreateNewPCRB(pcrb);

        _dalServiceMock.Verify(d => d.ExecuteAsync(It.IsAny<string>(), pcrb), Times.Once);
    }

    [Fact]
    public async Task CreateNewPCRB_WithNullParam_ShouldThrowException()
    {
        await Assert.ThrowsAsync<ArgumentNullException>(() => _pcrbService.CreateNewPCRB(null));
    }

    [Fact]
    public async Task CreateNewPCRB_WithDatabaseFailure_ShouldThrowException()
    {
        var pcrb = new PCRB
        {
            OwnerID = 1,
            Title = "Test Title",
            ChangeLevel = "Level 1",
            ReasonForChange = "Test Reason",
            ChangeDescription = "Test Description",
            IsITAR = false,
            CurrentStep = 1,
            InsertTimeStamp = DateTime.Now,
            LastUpdateDate = DateTime.Now,
            Type = "Type 1"
        };

        _dalServiceMock.Setup(d => d.ExecuteAsync(It.IsAny<string>(), pcrb))
            .ReturnsAsync(0);

        await Assert.ThrowsAsync<Exception>(() => _pcrbService.CreateNewPCRB(pcrb));
    }

    [Fact]
    public async Task CreateNewPCRB_WithDatabaseException_ShouldThrowException()
    {
        var pcrb = new PCRB
        {
            OwnerID = 1,
            Title = "Test Title",
            ChangeLevel = "Level 1",
            ReasonForChange = "Test Reason",
            ChangeDescription = "Test Description",
            IsITAR = false,
            CurrentStep = 1,
            InsertTimeStamp = DateTime.Now,
            LastUpdateDate = DateTime.Now,
            Type = "Type 1"
        };

        _dalServiceMock.Setup(d => d.ExecuteAsync(It.IsAny<string>(), pcrb))
            .Throws<Exception>();

        await Assert.ThrowsAsync<Exception>(() => _pcrbService.CreateNewPCRB(pcrb));
    }

    [Fact]
    public async Task UpdatePCRB_WithValidParam_ShouldUpdatePCRB()
    {
        _cacheMock = MockMemoryCacheService.GetMemoryCache(PCRBS);

        _pcrbService = new PCRBService(
            _loggerMock.Object,
            _dalServiceMock.Object,
            _cacheMock.Object,
            _userServiceMock.Object,
            _approvalServiceMock.Object,
            _smtpServiceMock.Object,
            appSettings
        );

        var pcrb = new PCRB
        {
            PlanNumber = 1,
            OwnerID = 1,
            Title = "Test Title",
            ChangeLevel = "Level 1",
            ReasonForChange = "Test Reason",
            ChangeDescription = "Test Description",
            IsITAR = false,
            CurrentStep = 1,
            LastUpdateDate = DateTime.Now,
            ClosedDate = DateTime.Now,
            Type = "Type 1"
        };

        _dalServiceMock.Setup(d => d.ExecuteAsync(It.IsAny<string>(), pcrb))
            .ReturnsAsync(1);

        await _pcrbService.UpdatePCRB(pcrb);

        _dalServiceMock.Verify(d => d.ExecuteAsync(It.IsAny<string>(), pcrb), Times.Once);
    }

    [Fact]
    public async Task UpdatePCRB_WithNullParam_ShouldThrowException()
    {
        await Assert.ThrowsAsync<ArgumentNullException>(() => _pcrbService.UpdatePCRB(null));
    }

    [Fact]
    public async Task UpdatePCRB_WithDatabaseFailure_ShouldThrowException()
    {
        var pcrb = new PCRB
        {
            PlanNumber = 1,
            OwnerID = 1,
            Title = "Test Title",
            ChangeLevel = "Level 1",
            ReasonForChange = "Test Reason",
            ChangeDescription = "Test Description",
            IsITAR = false,
            CurrentStep = 1,
            LastUpdateDate = DateTime.Now,
            ClosedDate = DateTime.Now,
            Type = "Type 1"
        };

        _dalServiceMock.Setup(d => d.ExecuteAsync(It.IsAny<string>(), pcrb))
            .ReturnsAsync(0);

        await Assert.ThrowsAsync<Exception>(() => _pcrbService.UpdatePCRB(pcrb));
    }

    [Fact]
    public async Task UpdatePCRB_WithDatabaseException_ShouldThrowException()
    {
        var pcrb = new PCRB
        {
            PlanNumber = 1,
            OwnerID = 1,
            Title = "Test Title",
            ChangeLevel = "Level 1",
            ReasonForChange = "Test Reason",
            ChangeDescription = "Test Description",
            IsITAR = false,
            CurrentStep = 1,
            LastUpdateDate = DateTime.Now,
            ClosedDate = DateTime.Now,
            Type = "Type 1"
        };

        _dalServiceMock.Setup(d => d.ExecuteAsync(It.IsAny<string>(), pcrb))
            .Throws<Exception>();

        await Assert.ThrowsAsync<Exception>(() => _pcrbService.UpdatePCRB(pcrb));
    }

    [Fact]
    public async Task NotifyApprover_ShouldSendNotification()
    {
        PCRBNotification notification = new PCRBNotification
        {
            Message = "Test Message",
            PCRB = new PCRB { PlanNumber = 1, Title = "Test PCRB" },
            Approval = new Approval
            {
                UserID = 1,
                IssueID = 1,
                RoleName = "Role",
                SubRole = "SubRole",
                SubRoleID = 1,
                AssignedDate = DateTime.Now
            }
        };

        _userServiceMock.Setup(s => s.GetUserByUserId(It.IsAny<int>()))
                        .ReturnsAsync(new User
                        {
                            UserID = 1,
                            LoginID = "testLogin",
                            FirstName = "Test",
                            LastName = "User",
                            Email = "test@example.com"
                        });

        _smtpServiceMock.Setup(s => s.SendEmail(It.IsAny<IEnumerable<MailAddress>>(),
                                                It.IsAny<IEnumerable<MailAddress>>(),
                                                It.IsAny<string>(),
                                                It.IsAny<string>()))
            .ReturnsAsync(true);

        _approvalServiceMock.Setup(s => s.UpdateApproval(It.IsAny<Approval>()))
            .Returns(Task.CompletedTask);

        await _pcrbService.NotifyApprover(notification);

        _smtpServiceMock.Verify(s => s.SendEmail(It.IsAny<IEnumerable<MailAddress>>(),
                                                 It.IsAny<IEnumerable<MailAddress>>(),
                                                 It.IsAny<string>(),
                                                 It.IsAny<string>()), Times.Once);
        _approvalServiceMock.Verify(s => s.UpdateApproval(It.IsAny<Approval>()), Times.Once);
    }

    [Fact]
    public async Task NotifyApprover_ShouldThrowException_WhenNotificationIsNull()
    {
        await Assert.ThrowsAsync<ArgumentNullException>(() => _pcrbService.NotifyApprover(null));
    }

    [Fact]
    public async Task NotifyApprover_ShouldThrowException_WhenPCRBIsNull()
    {
        PCRBNotification notification = new PCRBNotification
        {
            Message = "Test Message",
            PCRB = null,
            Approval = new Approval
            {
                UserID = 1,
                IssueID = 1,
                RoleName = "Role",
                SubRole = "SubRole",
                SubRoleID = 1,
                AssignedDate = DateTime.Now
            }
        };

        await Assert.ThrowsAsync<ArgumentNullException>(() => _pcrbService.NotifyApprover(notification));
    }

    [Fact]
    public async Task NotifyApprover_ShouldThrowException_WhenApprovalIsNull()
    {
        PCRBNotification notification = new PCRBNotification
        {
            Message = "Test Message",
            PCRB = new PCRB { PlanNumber = 1, Title = "Test PCRB" },
            Approval = null
        };

        await Assert.ThrowsAsync<ArgumentNullException>(() => _pcrbService.NotifyApprover(notification));
    }
}