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

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

    public class UpdateEmailUsersCommandHandlers : IRequestHandler<UpdateEmailUsersCommand, Result<UserDto>>
    {
        private readonly ILogger<UpdateEmailUsersCommandHandlers> logger;
        private readonly IMapper mapper;
        private readonly IUnitOfWork unitOfWork;
        public UpdateEmailUsersCommandHandlers(ILogger<UpdateEmailUsersCommandHandlers> logger, IMapper mapper, IUnitOfWork unitOfWork)
        {
            this.unitOfWork = unitOfWork;
            this.mapper = mapper;
            this.logger = logger;
        }
        public async Task<Result<UserDto>> Handle(UpdateEmailUsersCommand command, CancellationToken cancellationToken)
        {
            if (command.Id <= 0)
                throw new ArgumentException($"Parameter {nameof(command.Id)} must not be grater than 0");
            logger.LogInformation("Updating user email ...");
            try
            {
                var user = await unitOfWork.UsersRepository.GetByIdAsync(command.Id);
                unitOfWork.UsersRepository.UpdateEmail(user,command.User.Email);
                await unitOfWork.SaveChangesAsync();
                var updatedUser = mapper.Map<User, UserDto>(user);
                logger.LogInformation($"Email of the 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." };
            }
        }
    }
}