using System.Net;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.SignalR;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Moq;
using PowderCoating.Application.Interfaces;
using PowderCoating.Core.Entities;
using PowderCoating.Core.Enums;
using PowderCoating.Infrastructure.Data;
using PowderCoating.Infrastructure.Repositories;
using PowderCoating.Web.Controllers;
using PowderCoating.Web.Hubs;
using PowderCoating.Web.ViewModels;

namespace PowderCoating.UnitTests;

public class QuoteApprovalControllerTests
{
    [Fact]
    public async Task ShowApprovalPage_WhenTokenExpired_ReturnsTokenExpiredView()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1);
        context.Quotes.Add(CreateQuote(1, customerId: 10, token: "expired-token", expiresAt: DateTime.UtcNow.AddMinutes(-1)));
        await context.SaveChangesAsync();

        var controller = CreateController(context);

        var result = await controller.ShowApprovalPage("expired-token");

        var view = Assert.IsType<ViewResult>(result);
        Assert.Equal("TokenExpired", view.ViewName);
        var model = Assert.IsType<QuoteApprovalViewModel>(view.Model);
        Assert.Equal("expired-token", model.Token);
    }

    [Fact]
    public async Task ShowApprovalPage_WhenQuoteAlreadyInTerminalStatus_ReturnsAlreadyActedView()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1);
        context.Quotes.Add(CreateQuote(1, customerId: 10, token: "approved-token", statusId: 2, declineReason: "Old decline"));
        await context.SaveChangesAsync();

        var controller = CreateController(context);

        var result = await controller.ShowApprovalPage("approved-token");

        var view = Assert.IsType<ViewResult>(result);
        Assert.Equal("AlreadyActed", view.ViewName);
        var model = Assert.IsType<QuoteApprovalViewModel>(view.Model);
        Assert.Equal("Approved", model.CurrentStatus);
        Assert.Equal("Old decline", model.DeclineReason);
    }

    [Fact]
    public async Task Approve_WhenQuoteIsProspect_ReturnsConfirmDetailsView()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1);
        context.Quotes.Add(CreateQuote(1, customerId: null, token: "prospect-token"));
        await context.SaveChangesAsync();

        var controller = CreateController(context);

        var result = await controller.Approve("prospect-token");

        var view = Assert.IsType<ViewResult>(result);
        Assert.Equal("ConfirmDetails", view.ViewName);
        var model = Assert.IsType<QuoteApprovalViewModel>(view.Model);
        Assert.True(model.IsProspect);
    }

    [Fact]
    public async Task SubmitDetails_WhenRequiredFieldsMissing_ReturnsConfirmDetailsWithError()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1);
        context.Quotes.Add(CreateQuote(1, customerId: null, token: "missing-details"));
        await context.SaveChangesAsync();

        var controller = CreateController(context);

        var result = await controller.SubmitDetails(
            "missing-details",
            contactName: " ",
            email: " prospect@example.com ",
            phone: null,
            companyName: " Prospect Co ",
            address: " 123 Main ",
            city: " Akron ",
            state: " OH ",
            zipCode: " 44301 ");

        var view = Assert.IsType<ViewResult>(result);
        Assert.Equal("ConfirmDetails", view.ViewName);
        var model = Assert.IsType<QuoteApprovalViewModel>(view.Model);
        Assert.Equal("Please enter your name and at least one contact method (email or phone).", model.DeclineError);
        Assert.Equal(" prospect@example.com ", model.ProspectEmail);
        Assert.Equal(" Prospect Co ", model.ProspectCompanyName);
    }

    [Fact]
    public async Task SubmitDetails_WhenValidProspect_ApprovesQuoteAndTrimsFields()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1);
        context.Quotes.Add(CreateQuote(1, customerId: null, token: "prospect-approve"));
        await context.SaveChangesAsync();

        var notifications = new Mock<INotificationService>();
        notifications
            .Setup(x => x.NotifyQuoteActedByCustomerAsync(It.IsAny<Quote>(), true, null))
            .Returns(Task.CompletedTask);

        var inApp = new Mock<IInAppNotificationService>();
        inApp.Setup(x => x.CreateAsync(1, It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int?>(), It.IsAny<int?>(), It.IsAny<int?>()))
            .Returns(Task.CompletedTask);

        var clientProxy = new Mock<IClientProxy>();
        clientProxy
            .Setup(x => x.SendCoreAsync(It.IsAny<string>(), It.IsAny<object[]>(), It.IsAny<CancellationToken>()))
            .Returns(Task.CompletedTask);

        var controller = CreateController(
            context,
            notifications: notifications,
            inApp: inApp,
            clientProxy: clientProxy);

        var result = await controller.SubmitDetails(
            "prospect-approve",
            contactName: " Pat Prospect ",
            email: " prospect@example.com ",
            phone: " 555-0100 ",
            companyName: " Prospect Co ",
            address: " 123 Main ",
            city: " Akron ",
            state: " OH ",
            zipCode: " 44301 ");

        var redirect = Assert.IsType<RedirectResult>(result);
        Assert.Equal("/quote-approval/prospect-approve/confirmation?action=approved", redirect.Url);

        var quote = await context.Quotes.IgnoreQueryFilters().SingleAsync();
        Assert.Equal(2, quote.QuoteStatusId);
        Assert.Equal("Pat Prospect", quote.ProspectContactName);
        Assert.Equal("prospect@example.com", quote.ProspectEmail);
        Assert.Equal("555-0100", quote.ProspectPhone);
        Assert.Equal("Prospect Co", quote.ProspectCompanyName);
        Assert.NotNull(quote.ApprovalTokenUsedAt);
        Assert.Single(await context.QuoteChangeHistories.IgnoreQueryFilters().ToListAsync());
        notifications.Verify(x => x.NotifyQuoteActedByCustomerAsync(It.IsAny<Quote>(), true, null), Times.Once);
        inApp.Verify(x => x.CreateAsync(1, "Quote Approved", It.IsAny<string>(), "QuoteApproved", "/Quotes/Details/1", 1, null, null), Times.Once);
        clientProxy.Verify(x => x.SendCoreAsync("QuoteActedByCustomer", It.IsAny<object[]>(), It.IsAny<CancellationToken>()), Times.Once);
    }

    [Fact]
    public async Task Approve_WhenCustomerQuoteRequiresDeposit_GeneratesDepositLinkAndClearsPriorDecline()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1, stripeStatus: StripeConnectStatus.Active);
        context.Customers.Add(new Customer
        {
            Id = 10,
            CompanyId = 1,
            CompanyName = "Acme Customer"
        });
        context.Quotes.Add(CreateQuote(
            1,
            customerId: 10,
            token: "deposit-token",
            requiresDeposit: true,
            depositPercent: 50m,
            declineReason: "Need more time"));
        await context.SaveChangesAsync();

        var controller = CreateController(context);

        var result = await controller.Approve("deposit-token");

        var redirect = Assert.IsType<RedirectResult>(result);
        Assert.Equal("/quote-approval/deposit-token/confirmation?action=approved", redirect.Url);

        var quote = await context.Quotes.IgnoreQueryFilters().SingleAsync();
        Assert.Equal(2, quote.QuoteStatusId);
        Assert.Null(quote.DeclineReason);
        Assert.NotNull(quote.DepositPaymentLinkToken);
        Assert.True(quote.DepositPaymentLinkExpiresAt > DateTime.UtcNow.AddDays(6));

        var history = await context.QuoteChangeHistories.IgnoreQueryFilters().SingleAsync();
        Assert.Contains("previously declined", history.ChangeDescription);
    }

    [Fact]
    public async Task Approve_WhenTokenAlreadyUsed_ReturnsAlreadyActedView()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1);
        context.Quotes.Add(CreateQuote(
            1,
            customerId: 10,
            token: "used-token",
            approvalUsedAt: DateTime.UtcNow.AddMinutes(-5)));
        await context.SaveChangesAsync();

        var controller = CreateController(context);

        var result = await controller.Approve("used-token");

        var view = Assert.IsType<ViewResult>(result);
        Assert.Equal("AlreadyActed", view.ViewName);
    }

    [Fact]
    public async Task Decline_WhenReasonBlank_ReturnsApprovalPageWithError()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1);
        context.Quotes.Add(CreateQuote(1, customerId: 10, token: "blank-decline"));
        await context.SaveChangesAsync();

        var controller = CreateController(context);

        var result = await controller.Decline("blank-decline", " ");

        var view = Assert.IsType<ViewResult>(result);
        Assert.Equal("ApprovalPage", view.ViewName);
        var model = Assert.IsType<QuoteApprovalViewModel>(view.Model);
        Assert.Equal("Please enter a reason for declining.", model.DeclineError);
    }

    [Fact]
    public async Task Decline_UsesRejectedStatusCodeFallbackAndTruncatesStoredReason()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1, useRejectedFlag: false);
        context.Quotes.Add(CreateQuote(1, customerId: 10, token: "decline-token"));
        await context.SaveChangesAsync();

        var notifications = new Mock<INotificationService>();
        notifications
            .Setup(x => x.NotifyQuoteActedByCustomerAsync(It.IsAny<Quote>(), false, It.IsAny<string>()))
            .Returns(Task.CompletedTask);

        var reason = $"  {new string('x', 1005)}  ";
        var controller = CreateController(
            context,
            notifications: notifications,
            remoteIpAddress: IPAddress.Parse("203.0.113.9"));

        var result = await controller.Decline("decline-token", reason);

        var redirect = Assert.IsType<RedirectResult>(result);
        Assert.Equal("/quote-approval/decline-token/confirmation?action=declined", redirect.Url);

        var quote = await context.Quotes.IgnoreQueryFilters().SingleAsync();
        Assert.Equal(3, quote.QuoteStatusId);
        Assert.Equal(1000, quote.DeclineReason!.Length);
        Assert.Equal("203.0.113.9", quote.DeclinedByIp);
        Assert.NotNull(quote.ApprovalTokenUsedAt);
        Assert.Single(await context.QuoteChangeHistories.IgnoreQueryFilters().ToListAsync());
        notifications.Verify(x => x.NotifyQuoteActedByCustomerAsync(It.IsAny<Quote>(), false, It.IsAny<string>()), Times.Once);
    }

    [Fact]
    public async Task Confirmation_HidesExpiredDepositLink()
    {
        await using var context = CreateContext();
        SeedCompanyAndStatuses(context, companyId: 1);
        context.Quotes.Add(CreateQuote(
            1,
            customerId: 10,
            token: "confirm-token",
            requiresDeposit: true,
            depositPercent: 25m,
            depositLinkToken: "expired-link",
            depositLinkExpiresAt: DateTime.UtcNow.AddMinutes(-2),
            total: 120m));
        await context.SaveChangesAsync();

        var controller = CreateController(context);

        var result = await controller.Confirmation("confirm-token", "APPROVED");

        var view = Assert.IsType<ViewResult>(result);
        Assert.Equal("Confirmation", view.ViewName);
        var model = Assert.IsType<QuoteApprovalViewModel>(view.Model);
        Assert.Null(model.DepositPaymentLinkToken);
        Assert.Equal(30m, model.DepositAmount);
        Assert.Equal("approved", controller.ViewBag.Action);
    }

    private static QuoteApprovalController CreateController(
        ApplicationDbContext context,
        Mock<INotificationService>? notifications = null,
        Mock<IInAppNotificationService>? inApp = null,
        Mock<IClientProxy>? clientProxy = null,
        IPAddress? remoteIpAddress = null)
    {
        notifications ??= new Mock<INotificationService>();
        notifications.Setup(x => x.NotifyQuoteActedByCustomerAsync(It.IsAny<Quote>(), It.IsAny<bool>(), It.IsAny<string?>()))
            .Returns(Task.CompletedTask);

        inApp ??= new Mock<IInAppNotificationService>();
        inApp.Setup(x => x.CreateAsync(It.IsAny<int>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string?>(), It.IsAny<int?>(), It.IsAny<int?>(), It.IsAny<int?>()))
            .Returns(Task.CompletedTask);

        clientProxy ??= new Mock<IClientProxy>();
        clientProxy.Setup(x => x.SendCoreAsync(It.IsAny<string>(), It.IsAny<object[]>(), It.IsAny<CancellationToken>()))
            .Returns(Task.CompletedTask);

        var hubClients = new Mock<IHubClients>();
        hubClients.Setup(x => x.Group(It.IsAny<string>())).Returns(clientProxy.Object);

        var hubContext = new Mock<IHubContext<NotificationHub>>();
        hubContext.SetupGet(x => x.Clients).Returns(hubClients.Object);

        var controller = new QuoteApprovalController(
            new UnitOfWork(context),
            notifications.Object,
            inApp.Object,
            Mock.Of<IStripeConnectService>(),
            Mock.Of<ILogger<QuoteApprovalController>>(),
            new ConfigurationBuilder().Build(),
            hubContext.Object);

        var httpContext = new DefaultHttpContext();
        if (remoteIpAddress != null)
        {
            httpContext.Connection.RemoteIpAddress = remoteIpAddress;
        }

        controller.ControllerContext = new ControllerContext
        {
            HttpContext = httpContext
        };

        return controller;
    }

    private static void SeedCompanyAndStatuses(
        ApplicationDbContext context,
        int companyId,
        StripeConnectStatus stripeStatus = StripeConnectStatus.NotConnected,
        bool useRejectedFlag = true)
    {
        context.Companies.Add(new Company
        {
            Id = companyId,
            CompanyId = companyId,
            CompanyName = $"Company {companyId}",
            Phone = "555-0100",
            PrimaryContactName = "Owner",
            PrimaryContactEmail = $"owner{companyId}@example.com",
            StripeConnectStatus = stripeStatus
        });

        context.CompanyPreferences.Add(new CompanyPreferences
        {
            Id = companyId,
            CompanyId = companyId,
            EmailFromAddress = $"quotes{companyId}@example.com"
        });

        context.QuoteStatusLookups.AddRange(
            new QuoteStatusLookup
            {
                Id = 1,
                CompanyId = companyId,
                StatusCode = "PENDING",
                DisplayName = "Pending",
                DisplayOrder = 1
            },
            new QuoteStatusLookup
            {
                Id = 2,
                CompanyId = companyId,
                StatusCode = "APPROVED",
                DisplayName = "Approved",
                DisplayOrder = 2,
                IsApprovedStatus = true
            },
            new QuoteStatusLookup
            {
                Id = 3,
                CompanyId = companyId,
                StatusCode = "REJECTED",
                DisplayName = "Rejected",
                DisplayOrder = 3,
                IsRejectedStatus = useRejectedFlag
            },
            new QuoteStatusLookup
            {
                Id = 4,
                CompanyId = companyId,
                StatusCode = "CONVERTED",
                DisplayName = "Converted",
                DisplayOrder = 4,
                IsConvertedStatus = true
            });
    }

    private static Quote CreateQuote(
        int id,
        int? customerId,
        string token,
        int statusId = 1,
        DateTime? expiresAt = null,
        DateTime? approvalUsedAt = null,
        bool requiresDeposit = false,
        decimal depositPercent = 0m,
        string? declineReason = null,
        string? depositLinkToken = null,
        DateTime? depositLinkExpiresAt = null,
        decimal total = 100m)
    {
        return new Quote
        {
            Id = id,
            CompanyId = 1,
            QuoteNumber = $"Q-{id:000}",
            CustomerId = customerId,
            QuoteStatusId = statusId,
            ApprovalToken = token,
            ApprovalTokenExpiresAt = expiresAt ?? DateTime.UtcNow.AddDays(2),
            ApprovalTokenUsedAt = approvalUsedAt,
            RequiresDeposit = requiresDeposit,
            DepositPercent = depositPercent,
            DeclineReason = declineReason,
            DepositPaymentLinkToken = depositLinkToken,
            DepositPaymentLinkExpiresAt = depositLinkExpiresAt,
            Total = total,
            SubTotal = total,
            QuoteItems = []
        };
    }

    private static ApplicationDbContext CreateContext()
    {
        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
            .UseInMemoryDatabase(Guid.NewGuid().ToString())
            .Options;

        return new ApplicationDbContext(options);
    }
}