using AutoMapper;
using UserManagement.Application.Dtos.Incomming;
using UserManagement.Application.Dtos.Outgoing;
using UserManagement.Application.Interfaces;
using UserManagement.Domain.Entities;
using UserManagement.Infrastructure.Interfaces;

namespace UserManagement.Application.Services
{
    public class UserRolesService : IUserRolesService
    {
        // CTOR
        private readonly IUserRolesRepository _userRolesRepository;
        private readonly IUserRepository _userRepository;
        private readonly IRoleRepository _roleRepository;
        private readonly IMapper _mapper;

        public UserRolesService(IUserRolesRepository userRolesRepository, IUserRepository userRepository, IRoleRepository roleRepository, IMapper mapper)
        {
            _userRolesRepository = userRolesRepository;
            _userRepository = userRepository;
            _roleRepository = roleRepository;
            _mapper = mapper;
        }

        // CREATE ASSIGNMENT
        public async Task<bool> CreateAssignmentAsync(CreatingUserRolesDto creatingUserRolesDto)
        {
            if (creatingUserRolesDto.UserId <= 0)
            {
                throw new ArgumentException("Ungültige Id!");
            }

            var user = await _userRepository.GetByIdAsync(creatingUserRolesDto.UserId);

            if (user == null)
            {
                throw new KeyNotFoundException("Benutzer nicht gefunden!");
            }

            if (creatingUserRolesDto.RoleId <= 0)
            {
                throw new ArgumentException("Ungültige Id!");
            }

            var role = await _roleRepository.GetByIdAsync(creatingUserRolesDto.RoleId);

            if (role == null)
            {
                throw new KeyNotFoundException("Rolle nicht gefunden!");
            }

            var userRoles = _mapper.Map<UserRoles>(creatingUserRolesDto);

            var assigned = await _userRolesRepository.CreateAssignmentAsync(userRoles);

            return assigned;
        }

        //// ASSIGNING ROLES BY NAMES
        //public async Task<bool> AssignAsync(string username, string roleName)
        //{
        //    var user = await _userRepository.GetByUsernameAsync(username);
        //    var role = await _roleRepository.GetByNameAsync(roleName);

        //    if (user is null || role is null)
        //    {
        //        return false;
        //    }

        //    var dto = new CreatingUserRolesDto()
        //    {
        //        RoleId = role.Id,
        //        UserId = user.Id
        //    };

        //    return await CreateAssignmentAsync(dto);
        //}

        // REMOVE ROLE FROM USER
        public async Task<bool> RemoveRoleFromUserAsync(CreatingUserRolesDto creatingUserRolesDto)
        {
            if (creatingUserRolesDto.UserId <= 0)
            {
                throw new ArgumentException("Ungültige Id!");
            }

            var user = await _userRepository.GetByIdAsync(creatingUserRolesDto.UserId);

            if (user == null)
            {
                throw new KeyNotFoundException("Benutzer nicht gefunden!");
            }

            if (creatingUserRolesDto.RoleId <= 0)
            {
                throw new ArgumentException("Ungültige Id!");
            }

            var role = await _roleRepository.GetByIdAsync(creatingUserRolesDto.RoleId);

            if (role == null)
            {
                throw new KeyNotFoundException("Rolle nicht gefunden!");
            }

            var userRole = _mapper.Map<UserRoles>(creatingUserRolesDto);

            if (userRole == null)
            {
                throw new KeyNotFoundException("Die Rolle ist dem Benutzer nicht zugewiesen!");
            }

            var result = await _userRolesRepository.DeleteAssignmentAsync(userRole);

            return result;
        }
    }
}