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

namespace PnvPanel.Application.Tests.Support;

public class ListMyTicketsQueryHandlerTests
{
    private readonly IIdentityService _identityService = Substitute.For<IIdentityService>();

    [Fact]
    public async Task Handle_ReturnsFirstMessageAsPreview_NotLastComment()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        var ticket = SupportTicket.CreateBugReport(userId);
        dbContext.SupportTickets.Add(ticket);

        var firstComment = TicketComment.Create(ticket.Id, userId, "исходное сообщение о баге");
        dbContext.TicketComments.Add(firstComment);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        // Гарантируем, что второй комментарий получит более поздний CreatedAt (UtcNow может
        // совпасть при быстром последовательном создании без явного clock-абстрагирования).
        await Task.Delay(5, CancellationToken.None);
        var replyComment = TicketComment.Create(
            ticket.Id,
            userId,
            "более поздний ответ администратора"
        );
        dbContext.TicketComments.Add(replyComment);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        _identityService
            .GetUserNamesAsync(Arg.Any<IReadOnlyCollection<Guid>>(), Arg.Any<CancellationToken>())
            .Returns(new Dictionary<Guid, string> { [userId] = "alice" });

        var currentUser = FakeCurrentUser.Authenticated(userId, "alice");
        var handler = new ListMyTicketsQueryHandler(dbContext, _identityService, currentUser);

        var result = await handler.Handle(
            new ListMyTicketsQuery(TypeFilter: null, StatusFilter: null, Page: 1, PageSize: 20),
            CancellationToken.None
        );

        Assert.True(result.IsSuccess);
        var summary = Assert.Single(result.Value.Items);
        Assert.Equal("исходное сообщение о баге", summary.MessagePreview);
    }

    [Fact]
    public async Task Handle_TruncatesLongMessagePreview()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var userId = Guid.NewGuid();
        var ticket = SupportTicket.CreateBugReport(userId);
        dbContext.SupportTickets.Add(ticket);

        var longBody = new string('x', 250);
        dbContext.TicketComments.Add(TicketComment.Create(ticket.Id, userId, longBody));
        await dbContext.SaveChangesAsync(CancellationToken.None);

        _identityService
            .GetUserNamesAsync(Arg.Any<IReadOnlyCollection<Guid>>(), Arg.Any<CancellationToken>())
            .Returns(new Dictionary<Guid, string> { [userId] = "alice" });

        var currentUser = FakeCurrentUser.Authenticated(userId, "alice");
        var handler = new ListMyTicketsQueryHandler(dbContext, _identityService, currentUser);

        var result = await handler.Handle(
            new ListMyTicketsQuery(TypeFilter: null, StatusFilter: null, Page: 1, PageSize: 20),
            CancellationToken.None
        );

        Assert.True(result.IsSuccess);
        var summary = Assert.Single(result.Value.Items);
        Assert.Equal(201, summary.MessagePreview!.Length);
        Assert.EndsWith("…", summary.MessagePreview);
    }
}