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

namespace PnvPanel.Application.Billing.MarkPaymentSent;

public sealed class MarkPaymentSentCommandHandler(
    IAppDbContext dbContext,
    IIdentityService identityService,
    ITelegramNotifier telegramNotifier,
    ICurrentUser currentUser
) : ICommandHandler<MarkPaymentSentCommand, Result>
{
    public async Task<Result> Handle(MarkPaymentSentCommand command, CancellationToken cancellationToken)
    {
        if (currentUser.UserId is not { } userId)
            return Result.Failure(AuthErrors.Unauthorized);

        var request = await dbContext.PaymentRequests.FirstOrDefaultAsync(
            r => r.Id == command.RequestId && r.UserId == userId,
            cancellationToken
        );
        if (request is null)
            return Result.Failure(BillingErrors.RequestNotFound);

        if (request.Status != PaymentRequestStatus.AwaitingPayment)
            return Result.Failure(BillingErrors.RequestNotAwaitingPayment);

        request.MarkPaymentSent();

        var profile = await identityService.GetProfileAsync(userId, cancellationToken);
        await telegramNotifier.NotifyAdminsPaymentRequestedAsync(
            request.Id,
            profile?.UserName ?? userId.ToString(),
            request.Kind,
            request.Period,
            request.AmountSnapshot,
            cancellationToken
        );

        return Result.Success();
    }
}