using DigitalData.Core.Abstraction.Application.Repository;
using DigitalData.Core.Abstractions;
using EnvelopeGenerator.Application.Common.Configurations;
using EnvelopeGenerator.Domain.Entities;
using GdPicture14;
using MediatR;
using Microsoft.EntityFrameworkCore;

namespace EnvelopeGenerator.Application.Pdf;

/// <summary>
/// 
/// </summary>
public class BurnPdfCommand : IRequest
{
}

/// <summary>
/// 
/// </summary>
public class BurnPdfCommandHandler : IRequestHandler<BurnPdfCommand>
{
    /// <summary>
    /// 
    /// </summary>
    private readonly PDFBurnerParams _pdfBurnerParams;

    private readonly AnnotationManager _manager;

    private readonly IRepository<Signature> _signRepo;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="pdfBurnerParams"></param>
    /// <param name="manager"></param>
    /// <param name="signRepo"></param>
    public BurnPdfCommandHandler(PDFBurnerParams pdfBurnerParams, AnnotationManager manager, IRepository<Signature> signRepo)
    {
        _pdfBurnerParams = pdfBurnerParams;
        _manager = manager;
        _signRepo = signRepo;
    }

    public byte[] BurnAnnotsToPDF(byte[] pSourceBuffer, List<string> pInstantJSONList, int envelopeId)
    {
        // read the elements of envelope with their annotations
        var elements = _signRepo
            .Where(sig => sig.Document.EnvelopeId == envelopeId)
            .Include(sig => sig.Annotations)
            .ToList();

        return elements.Any()
            ? BurnElementAnnotsToPDF(pSourceBuffer, elements)
            : BurnInstantJSONAnnotsToPDF(pSourceBuffer, pInstantJSONList);
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="pSourceBuffer"></param>
    /// <param name="elements"></param>
    /// <returns></returns>
    public byte[] BurnElementAnnotsToPDF(byte[] pSourceBuffer, List<Signature> elements)
    {
        return Enumerable.Empty<byte>().ToArray();
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="pSourceBuffer"></param>
    /// <param name="pInstantJSONList"></param>
    /// <returns></returns>
    public byte[] BurnInstantJSONAnnotsToPDF(byte[] pSourceBuffer, List<string> pInstantJSONList)
    {
        return Enumerable.Empty<byte>().ToArray();
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="request"></param>
    /// <param name="cancellationToken"></param>
    /// <returns></returns>
    /// <exception cref="NotImplementedException"></exception>
    public Task Handle(BurnPdfCommand request, CancellationToken cancellationToken)
    {
        throw new NotImplementedException();
    }
}