using DigitalData.Core.Abstractions.Infrastructure;
using EnvelopeGenerator.Application.DTOs;
using EnvelopeGenerator.Application.Exceptions;
using EnvelopeGenerator.Domain.Entities;
using MediatR;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace EnvelopeGenerator.Application.EmailTemplates.Commands.Update;

/// <summary>
/// 
/// </summary>
public class UpdateEmailTemplateCommandHandler : IRequestHandler<UpdateEmailTemplateCommand>
{
    private readonly IRepository<EmailTemplate> _repository;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="repository"></param>
    public UpdateEmailTemplateCommandHandler(IRepository<EmailTemplate> repository)
    {
        _repository = repository;
    }

    public async Task Handle(UpdateEmailTemplateCommand request, CancellationToken cancel)
    {
        var temp = (request.EmailTemplateQuery?.Id is int id
            ? await _repository.ReadOrDefaultAsync<EmailTemplateDto>(t => t.Id == id, single: false, cancel)
            : request!.EmailTemplateQuery!.Type is Common.Constants.EmailTemplateType type
                ? await _repository.ReadOrDefaultAsync<EmailTemplateDto>(t => t.Name == type.ToString(), single: false, cancel)
                : throw new InvalidOperationException("Both id and type is null. Id: " + request.EmailTemplateQuery.Id + ". Type: " + request.EmailTemplateQuery.Type.ToString())) ?? throw new NotFoundException();

        if(request.Body is not null)
            temp.Body = request.Body;

        if (request.Subject is not null)
            temp.Subject = request.Subject;

        await _repository.UpdateAsync(temp, t => t.Id == temp.Id, cancel);
    }
}