using AutoMapper;
using Dapper;
using EnvelopeGenerator.Application.Contracts.SQLExecutor;
using EnvelopeGenerator.Application.SQL;
using EnvelopeGenerator.Domain.Entities;
using MediatR;

namespace EnvelopeGenerator.Application.Envelopes.Commands;

/// <summary>
/// 
/// </summary>
public class CreateEnvelopeCommandHandler : IRequestHandler<CreateEnvelopeCommand, CreateEnvelopeResponse?>
{
    private readonly ISQLExecutor _sqlExecutor;

    private readonly IMapper _mapper;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="sqlExecutor"></param>
    /// <param name="mapper"></param>
    public CreateEnvelopeCommandHandler(ISQLExecutor<Envelope> sqlExecutor, IMapper mapper)
    {
        _sqlExecutor = sqlExecutor;
        _mapper = mapper;
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="request"></param>
    /// <param name="cancellationToken"></param>
    /// <returns></returns>
    public async Task<CreateEnvelopeResponse?> Handle(CreateEnvelopeCommand request, CancellationToken cancellationToken)
    {
        int userId = request.UserId ?? throw new InvalidOperationException("UserId cannot be null when creating an envelope.");

        var envelope = await _sqlExecutor.CreateEnvelopeAsync<Envelope>(userId, request.Title, request.Message, request.TFAEnabled, cancellationToken);

        return _mapper.Map<CreateEnvelopeResponse>(envelope);
    }
}