using Features.Auth.Dtos;
using Features.Auth.Services;
using MediatR;

namespace Features.Auth.Commands.RefreshToken;

/// <summary>
/// Handles <see cref="RefreshTokenCommand"/> by validating the refresh token and issuing a new
/// access/refresh token pair.
/// </summary>
/// <param name="tokenService">Service used to validate and exchange the refresh token.</param>
public class RefreshTokenHandler(ITokenService tokenService)
    : IRequestHandler<RefreshTokenCommand, LoginPayload>
{
    public async Task<LoginPayload> Handle(RefreshTokenCommand request, CancellationToken cancellationToken)
    {
        var result = await tokenService.RefreshTokenAsync(request.RefreshToken);
        return new LoginPayload(result.UserAccount.UserAccountId, result.UserAccount.Username, result.RefreshToken, result.AccessToken);
    }
}