using DocumentService.Application.Common.DTOs;
using DocumentService.Application.Common.Interfaces;
using MediatR;

namespace DocumentService.Application.SignPdf;

public sealed record SignPdfCommand : IRequest<byte[]>
{
    public required Stream InputPdf { get; init; }
    public required PdfSignOptionsDto Options { get; init; }
    public Stream? SignatureImage { get; init; }
}

public sealed class SignPdfCommandHandler(IPdfDigitalSignatureService signer) : IRequestHandler<SignPdfCommand, byte[]>
{
    public async Task<byte[]> Handle(SignPdfCommand command, CancellationToken cancellationToken)
    {
        using var output = new MemoryStream();
        await signer.SignPdfAsync(command.InputPdf, output, command.Options, command.SignatureImage, cancellationToken);
        return output.ToArray();
    }
}