using Microsoft.EntityFrameworkCore;
using PnvPanel.Application.Auth;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Messaging;
using PnvPanel.Application.Common.Models;
using PnvPanel.Application.Support;
using PnvPanel.Domain.Audit;
using PnvPanel.Domain.Support;

namespace PnvPanel.Application.Admin.Support;

public sealed class RejectExtensionRequestCommandHandler(
    IAppDbContext dbContext,
    IRealtimeNotifier notifier,
    ITelegramNotifier telegramNotifier,
    ICurrentUser currentUser
) : ICommandHandler<RejectExtensionRequestCommand, Result>
{
    public async Task<Result> Handle(
        RejectExtensionRequestCommand command,
        CancellationToken cancellationToken
    )
    {
        if (currentUser.UserId is not { } adminId)
            return Result.Failure(AuthErrors.Unauthorized);

        var ticket = await dbContext.SupportTickets.FirstOrDefaultAsync(
            t => t.Id == command.TicketId,
            cancellationToken
        );
        if (ticket is null)
            return Result.Failure(SupportErrors.NotFound);

        if (ticket.Type != TicketType.ExtensionRequest)
            return Result.Failure(SupportErrors.NotExtensionRequest);

        if (ticket.Status == TicketStatus.Closed)
            return Result.Failure(SupportErrors.AlreadyClosed);

        if (!string.IsNullOrWhiteSpace(command.Reason))
            dbContext.TicketComments.Add(TicketComment.Create(ticket.Id, adminId, command.Reason));

        ticket.Close();

        dbContext.AuditLogs.Add(
            AuditLog.Create(
                adminId,
                "ExtensionRequestRejected",
                "SupportTicket",
                ticket.Id.ToString(),
                metadata: null,
                AuditSource.Web
            )
        );

        await notifier.NotifyTicketUpdatedAsync(ticket.Id, ticket.UserId, cancellationToken);
        await telegramNotifier.NotifyUserAsync(
            ticket.UserId,
            "❌ Ваша заявка на продление отклонена.",
            $"/support?ticket={ticket.Id}",
            cancellationToken
        );

        return Result.Success();
    }
}