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

namespace BlackRock.Reporting.API.Mediator
{
    public class GetUsersQuery : IRequest<Result<UserDto>>
    {
        public Guid Id { get; }
        public GetUsersQuery(Guid id)
        {
            this.Id = id;
        }
    }

    public class GetUsersQueryHandlers : IRequestHandler<GetUsersQuery, Result<UserDto>>
    {
        private readonly ILogger<GetUsersQueryHandlers> logger;
        private readonly IMapper mapper;
        private readonly IUsersRepository repository;
        private readonly IUnitOfWork unitOfWork;
        public GetUsersQueryHandlers(ILogger<GetUsersQueryHandlers> logger, IMapper mapper, IUsersRepository repository, IUnitOfWork unitOfWork)
        {
            this.unitOfWork = unitOfWork;
            this.repository = repository;
            this.mapper = mapper;
            this.logger = logger;
        }
        public async Task<Result<UserDto>> Handle(GetUsersQuery command, CancellationToken cancellationToken)
        {
            if (command.Id == Guid.Empty)
                throw new ArgumentException($"Parameter {nameof(command.Id)} must not be null or empty");
            logger.LogInformation("Getting user ...");
            try
            {
                var user = await repository.GetByIdAsync(command.Id);
                var userDto = mapper.Map<User, UserDto>(user);
                logger.LogInformation($"The user with id {user.Id} has been founded successfully");
                return new Result<UserDto> { Data = userDto };
            }
            catch (Exception ex)
            {
                return new Result<UserDto> { IsSuccess = false, Error = "Faild to fetch data from DB." };
            }
        }
    }
}