using AutoMapper;
using BlackRock.Reporting.API.Core;
using BlackRock.Reporting.API.Models;
using MediatR;

namespace BlackRock.Reporting.API.Mediator
{
    public class CreateUsersCommand : IRequest<Result<Guid>>
    {
        public UserForm User { get; }
        public CreateUsersCommand(UserForm user)
        {
            this.User = user;
        }
    }

    public class CreateUsersCommandHandlers : IRequestHandler<CreateUsersCommand, Result<Guid>>
    {
        private readonly ILogger<CreateUsersCommandHandlers> logger;
        private readonly IMapper mapper;
        private readonly IUsersRepository repository;
        private readonly IUnitOfWork unitOfWork;
        public CreateUsersCommandHandlers(ILogger<CreateUsersCommandHandlers> logger, IMapper mapper, IUsersRepository repository, IUnitOfWork unitOfWork)
        {
            this.unitOfWork = unitOfWork;
            this.repository = repository;
            this.mapper = mapper;
            this.logger = logger;

        }
        public async Task<Result<Guid>> Handle(CreateUsersCommand command, CancellationToken cancellationToken)
        {
            if (command.User == null)
                throw new ArgumentException($"Parameter {nameof(command.User)} must not be null");

            try
            {
                logger.LogInformation("Creating new user ...");
                var user = mapper.Map<UserForm, User>(command.User);
                user.Id = Guid.NewGuid();
                await repository.AddAsync(user);
                await unitOfWork.SaveChangesAsync();
                logger.LogInformation($"User with id {user.Id} has been created successfully");
                return new Result<Guid> { Data = user.Id };
            }
            catch (Exception ex)
            {
                return new Result<Guid> { IsSuccess = false, Error = "Faild to add data to DB." };
            }
        }
    }
}