using EnvelopeGenerator.Application.Common.Notifications.DocSigned;
using EnvelopeGenerator.Application.Histories.Commands;
using EnvelopeGenerator.Domain.Constants;
using MediatR;
using Newtonsoft.Json;

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

/// <summary>
/// 
/// </summary>
public class HistoryHandler : INotificationHandler<DocSignedNotification>
{
    private readonly ISender _sender;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="sender"></param>
    public HistoryHandler(ISender sender)
    {
        _sender = sender;
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="notification"></param>
    /// <param name="cancel"></param>
    /// <returns></returns>
    public async Task Handle(DocSignedNotification notification, CancellationToken cancel)
    {
        if(notification.Receiver is null)
            if (notification.Receiver is null)
                throw new InvalidOperationException($"Receiver information is missing in the notification. DocSignedNotification:\n {JsonConvert.SerializeObject(notification, Format.Json.ForDiagnostics)}");

        await _sender.Send(new CreateHistoryCommand()
        {
            EnvelopeId = notification.EnvelopeId,
            UserReference = notification.Receiver.EmailAddress,
            Status = EnvelopeStatus.DocumentSigned,
            Comment = JsonConvert.SerializeObject(notification.Annotations, Format.Json.ForAnnotations)
        }, cancel);
    }
}