using AutoMapper;
using Liber_Incantamentum.Application.DTOs.Mage;
using Liber_Incantamentum.Application.Exceptions;
using Liber_Incantamentum.Application.Interfaces;
using Liber_Incantamentum.Domain.Entities;
using Liber_Incantamentum.Domain.Filter;
using Liber_Incantamentum.Domain.Repositories;

namespace Liber_Incantamentum.Application.Services.Generals
{
    public class MageService : IMageService
    {
        private readonly IMageRepository _mageRepository;
        private readonly IMapper _mapper;
        public MageService(IMageRepository mageRepository, IMapper mapper)
        {
            _mageRepository = mageRepository;
            _mapper = mapper;
        }

        public async Task<bool> AddMageAsync(MageDtoCreate dto)
        {
            if (dto == null)
            {
                throw new ArgumentNullException("The DTO received is null");
            }
            var alreadyExistingMage = await GetAllMagesAsync(new MageDtoFilter { Name = dto.Name, Rank = dto.Rank, Specialisation = dto.Specialisation });
            if (alreadyExistingMage.Any())
            {
                throw new AlreadyExistingException("This mage does already exists");
            }
            return await _mageRepository.AddMageAsync(_mapper.Map<Mage>(dto));
        }

        public async Task<bool> DeleteMageAsync(Guid id)
        {
            if (id == Guid.Empty)
            {
                throw new ArgumentNullException("The id is null");
            }
            var alreadyExistingMage = await GetAllMagesAsync(new MageDtoFilter { Id = id });
            if (!alreadyExistingMage.Any())
            {
                throw new NotFoundException("This mage does not exists");
            }
            return await _mageRepository.DeleteMageAsync(id);
        }

        public async Task<ICollection<MageDto>> GetAllMagesAsync(MageDtoFilter filter)
        {
            var entities = await _mageRepository.GetAllMagesAsync(_mapper.Map<MageFilter>(filter));
            return _mapper.Map<ICollection<MageDto>>(entities);
        }

        public async Task<MageDto>? GetMageByIdAsync(Guid id)
        {
            if (id == Guid.Empty)
            {
                throw new ArgumentNullException("The id is null");
            }
            var alreadyExistingMage = await GetAllMagesAsync(new MageDtoFilter { Id = id });
            if (!alreadyExistingMage.Any())
            {
                throw new NotFoundException("This mage does not exists");
            }
            var mage = await _mageRepository.GetMageByIdAsync(id);
            return _mapper.Map<MageDto>(mage);
        }

        public async Task<bool> UpdateMageAsync(MageDtoUpdate dto, Guid id)
        {
            if (dto == null)
            {
                throw new ArgumentNullException("The DTO received is null");
            }
            var alreadyExistingMage = await GetMageByIdAsync(id);
            if (alreadyExistingMage == null)
            {
                throw new NotFoundException("This mage does not exists");
            }
            return await _mageRepository.UpdateMageAsync(_mapper.Map<Mage>(dto));
        }
    }
}