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

namespace BlackRock.Reporting.API.Mediator.Commands
{
    public class UpdateAllUsersCommand : IRequest<Result<UserDto>>
    {
        public UserCommand User { get; }
        public int Id { get; }
        public UpdateAllUsersCommand(int id, UserCommand user)
        {
            this.Id = id;
            this.User = user;
        }
    }

    public class UpdateAllUsersCommandHandlers : IRequestHandler<UpdateAllUsersCommand, Result<UserDto>>
    {
        private readonly ILogger<UpdateAllUsersCommandHandlers> logger;
        private readonly IMapper mapper;
        private readonly IUnitOfWork unitOfWork;
        public UpdateAllUsersCommandHandlers(ILogger<UpdateAllUsersCommandHandlers> logger, IMapper mapper, IUnitOfWork unitOfWork)
        {
            this.unitOfWork = unitOfWork;
            this.mapper = mapper;
            this.logger = logger;
        }
        public async Task<Result<UserDto>> Handle(UpdateAllUsersCommand command, CancellationToken cancellationToken)
        {
            if (command.Id <= 0)
                throw new ArgumentException($"Parameter {nameof(command.Id)} must not be grater than 0");
            logger.LogInformation("Updating user ...");
            try
            {
                var user = await unitOfWork.UsersRepository.GetByIdAsync(command.Id);
                mapper.Map<UserCommand, User>(command.User, user);
                unitOfWork.UsersRepository.Update(user);
                await unitOfWork.SaveChangesAsync();
                var updatedUser = mapper.Map<User, UserDto>(user);
                logger.LogInformation($"User with id {user.Id} has been updated successfully");
                return new Result<UserDto> { Data = updatedUser };
            }
            catch (Exception ex)
            {
                return new Result<UserDto> { IsSuccess = false, Error = "Faild to update data in DB." };
            }
        }
    }
}