using NSubstitute;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Support;
using PnvPanel.Application.Support.CreateBugReport;
using PnvPanel.Application.Tests.TestSupport;
using PnvPanel.Domain.Support;
using Xunit;

namespace PnvPanel.Application.Tests.Support;

public class CreateBugReportTicketCommandHandlerTests
{
    private readonly IFileStorage _fileStorage = Substitute.For<IFileStorage>();
    private readonly IRealtimeNotifier _notifier = Substitute.For<IRealtimeNotifier>();
    private readonly ITelegramNotifier _telegramNotifier = Substitute.For<ITelegramNotifier>();

    [Fact]
    public async Task Handle_WithValidMessage_CreatesTicketAndComment()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        var currentUser = FakeCurrentUser.Authenticated(userId, "alice");

        var handler = new CreateBugReportTicketCommandHandler(
            dbContext,
            _fileStorage,
            _notifier,
            _telegramNotifier,
            currentUser
        );

        var result = await handler.Handle(
            new CreateBugReportTicketCommand("Что-то сломалось", []),
            CancellationToken.None
        );
        await dbContext.SaveChangesAsync(CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.Equal(TicketType.BugReport, result.Value.Type);
        Assert.Equal(TicketStatus.Open, result.Value.Status);
        Assert.Single(result.Value.Comments);
        Assert.Equal("Что-то сломалось", result.Value.Comments[0].Body);
        Assert.Single(dbContext.SupportTickets);
        Assert.Single(dbContext.TicketComments);
        await _telegramNotifier
            .Received(1)
            .NotifyAdminsBugReportCreatedAsync(
                Arg.Any<Guid>(),
                "alice",
                "Что-то сломалось",
                Arg.Any<CancellationToken>()
            );
    }

    [Fact]
    public async Task Handle_WithTooManyAttachments_ReturnsValidationError()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var currentUser = FakeCurrentUser.Authenticated(Guid.NewGuid());
        var attachments = Enumerable
            .Range(0, 6)
            .Select(_ => new TicketAttachmentUpload(new MemoryStream(), "a.png", "image/png", 10))
            .ToList();

        var handler = new CreateBugReportTicketCommandHandler(
            dbContext,
            _fileStorage,
            _notifier,
            _telegramNotifier,
            currentUser
        );

        var result = await handler.Handle(
            new CreateBugReportTicketCommand("текст", attachments),
            CancellationToken.None
        );

        Assert.False(result.IsSuccess);
        Assert.Equal(SupportErrors.TooManyAttachments, result.Error);
    }

    [Fact]
    public async Task Handle_WithUnsupportedAttachmentType_ReturnsValidationError()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var currentUser = FakeCurrentUser.Authenticated(Guid.NewGuid());
        var attachments = new[]
        {
            new TicketAttachmentUpload(new MemoryStream(), "a.exe", "application/x-msdownload", 10),
        };

        var handler = new CreateBugReportTicketCommandHandler(
            dbContext,
            _fileStorage,
            _notifier,
            _telegramNotifier,
            currentUser
        );

        var result = await handler.Handle(
            new CreateBugReportTicketCommand("текст", attachments),
            CancellationToken.None
        );

        Assert.False(result.IsSuccess);
        Assert.Equal(SupportErrors.UnsupportedAttachmentType, result.Error);
    }
}