using DigitalData.Core.Abstraction.Application.Repository;
using DigitalData.Core.Exceptions;
using EnvelopeGenerator.Application.Common.Dto;
using EnvelopeGenerator.Application.DocReceiverElements.Commands;
using EnvelopeGenerator.Domain.Entities;
using MediatR;

namespace EnvelopeGenerator.Application.DocReceiverElements.Behaviors;

/// <summary>
/// Pipeline behavior that saves annotations.
/// Executes first in the signing process.
/// </summary>
[Obsolete("The PSPDFKit library is deprecated.")]
public class AnnotationBehavior : IPipelineBehavior<SigningCommand, Unit>
{
    private readonly IRepository<ElementAnnotation> _repo;

    /// <summary>
    /// Initializes a new instance of the <see cref="AnnotationBehavior"/> class.
    /// </summary>
    /// <param name="repository"></param>
    public AnnotationBehavior(IRepository<ElementAnnotation> repository)
    {
        _repo = repository;
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="request"></param>
    /// <param name="next"></param>
    /// <param name="cancel"></param>
    /// <returns></returns>
    public async Task<Unit> Handle(SigningCommand request, RequestHandlerDelegate<Unit> next, CancellationToken cancel)
    {
        if(request.ReceiverAppType != ReceiverAppType.LegacyWeb)
            if(request.PsPdfKitAnnotation is null)
                return await next(cancel);
            else
                throw new BadRequestException("PsPdfKit Annotation are only supported for the legacy web receiver type.");

        if (request.PsPdfKitAnnotation is PsPdfKitAnnotation annot)
                await _repo.CreateAsync(annot.Structured, cancel);
            else
                throw new BadRequestException("Annotation data is missing or invalid.");

            return await next(cancel);
    }
}