using DigitalData.Core.Abstraction.Application.Repository;
using EnvelopeGenerator.Application.Common.Extensions;
using EnvelopeGenerator.Domain.Constants;
using MediatR;

namespace EnvelopeGenerator.Application.Common.Notifications.RemoveSignature.Handlers;

/// <summary>
/// 
/// </summary>
public class RemoveHistoryHandler : INotificationHandler<RemoveSignatureNotification>
{
    private readonly IRepository<Domain.Entities.History> _repo;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="repository"></param>
    public RemoveHistoryHandler(IRepository<Domain.Entities.History> repository)
    {
        _repo = repository;
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="notification"></param>
    /// <param name="cancel"></param>
    /// <returns></returns>
    public Task Handle(RemoveSignatureNotification notification, CancellationToken cancel)
    {
        return _repo.DeleteAsync(hists =>
        {
            hists = hists
                .Where(hist => hist.Envelope!.Uuid == notification.EnvelopeUuid)
                .Where(hist => hist.Status == EnvelopeStatus.DocumentSigned);

            if (notification.ReceiverSignature is string signature)
                hists = hists.Where(hist => hist.Receiver!.Signature == signature);

            return hists;
        }, cancel);
    }
}