using EnvelopeGenerator.Domain.Constants;
using MediatR;
using Microsoft.Extensions.Logging;

namespace EnvelopeGenerator.Application.Pdf.Behaviors;

/// <summary>
/// 
/// </summary>
public class SendEmailBehavior : IPipelineBehavior<BurnPdfCommand, byte[]>
{
    private readonly ILogger<SendEmailBehavior> _logger;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="logger"></param>
    public SendEmailBehavior(ILogger<SendEmailBehavior> logger)
    {
        _logger = logger;
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="request"></param>
    /// <param name="next"></param>
    /// <param name="cancel"></param>
    /// <returns></returns>
    public async Task<byte[]> Handle(BurnPdfCommand request, RequestHandlerDelegate<byte[]> next, CancellationToken cancel)
    {
        var docResult = await next(cancel);

        var mailToCreator = request.Envelope!.FinalEmailToCreator;
        var mailToReceivers = request.Envelope.FinalEmailToReceivers;

        if (mailToCreator is not null && mailToCreator != (int)FinalEmailType.No)
        {
            _logger.LogDebug("Sending email to creator ...");
            SendFinalEmailToCreator(request.Envelope); // , pAttachment
        }
        else
        {
            _logger.LogWarning("No SendFinalEmailToCreator - mailToCreator [{mailToCreator}] <> [{FinalEmailType.No}] ", 
                mailToCreator, FinalEmailType.No);
        }

        if (mailToReceivers != (int)FinalEmailType.No)
        {
            _logger.LogDebug("Sending emails to receivers...");
            SendFinalEmailToReceivers(request.Envelope); // , pAttachment
        }
        else
        {
            _logger.LogWarning("No SendFinalEmailToReceivers - mailToReceivers [{mailToReceivers}] <> [{FinalEmailType.No}] ", 
                mailToReceivers, FinalEmailType.No);
        }

        return docResult;
    }
}