using AutoMapper;
using BlackRock.Reporting.API.Core.Interfaces;
using BlackRock.Reporting.API.Core.Models;
using BlackRock.Reporting.API.Mediator.UserMediator.Model;
using BlackRock.Reporting.API.Mediator.UserMediator.Dto;
using MediatR;

namespace BlackRock.Reporting.API.Mediator.UserMediator.Queries
{
    public class GetAllUsersQuery : UsersFilter, IRequest<Result<PagedCollection<UserDto>>>
    {
    }

    public class GetAllUsersQueryHandlers : IRequestHandler<GetAllUsersQuery, Result<PagedCollection<UserDto>>>
    {
        private readonly ILogger<GetAllUsersQueryHandlers> logger;
        private readonly IMapper mapper;
        private readonly IUnitOfWork unitOfWork;
        public GetAllUsersQueryHandlers(ILogger<GetAllUsersQueryHandlers> logger, IMapper mapper, IUnitOfWork unitOfWork)
        {
            this.unitOfWork = unitOfWork;
            this.mapper = mapper;
            this.logger = logger;
        }
        public async Task<Result<PagedCollection<UserDto>>> Handle(GetAllUsersQuery command, CancellationToken cancellationToken)
        {
            if (command == null)
                throw new ArgumentNullException($"Parameter {nameof(command)} must not be null");
            logger.LogInformation("Getting users ...");
            try
            {
                var users = await unitOfWork.UsersRepository.GetAllByFilter(command);
                var usersDto = mapper.Map<PagedCollection<User>, PagedCollection<UserDto>>(users);
                logger.LogInformation($"The Users has been founded successfully");
                return new Result<PagedCollection<UserDto>> { Data = usersDto };
            }
            catch (Exception ex)
            {
                return new Result<PagedCollection<UserDto>> { IsSuccess = false, Error = "Faild to fetch data from DB." };
            }
        }
    }
}