package com.social.media.application.user.handler;

import com.social.media.application.user.command.DeactivateUserCommand;
import com.social.media.domain.user.aggregate.User;
import com.social.media.domain.user.repository.UserRepository;
import com.social.media.domain.user.service.UserDomainService;
import com.social.media.domain.shared.exception.BusinessRuleViolationException;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class DeactivateUserCommandHandler {
    
    private final UserRepository userRepository;
    private final UserDomainService userDomainService;
    
    public DeactivateUserCommandHandler(UserRepository userRepository, UserDomainService userDomainService) {
        this.userRepository = userRepository;
        this.userDomainService = userDomainService;
    }
    
    @Transactional
    public void handle(DeactivateUserCommand command) {
        User user = userRepository.findById(command.userId())
            .orElseThrow(() -> new BusinessRuleViolationException("User not found with ID: " + command.userId()));
        
        // Get user performing the deactivation for validation
        User deactivatedBy = null;
        if (command.deactivatedBy() != null) {
            deactivatedBy = userRepository.findById(command.deactivatedBy())
                .orElseThrow(() -> new BusinessRuleViolationException("Deactivator user not found"));
        }
        
        // Validate deletion rules (deactivation is similar to soft delete)
        userDomainService.validateUserDeletion(user, deactivatedBy);
        
        user.deactivate();
        userRepository.save(user);
    }
}

