package com.example.springdemo.serviceImpl;

import com.example.springdemo.dao.PermissionsRepository;
import com.example.springdemo.dao.RolesPermissionsRepository;
import com.example.springdemo.entities.RBAC.Permissions;
import com.example.springdemo.service.PermissionsService;
import jakarta.annotation.Resource;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

@Service
public class PermissionsServiceImpl implements PermissionsService {
    @Resource
    private PermissionsRepository permissionsRepository;

    @Resource
    private RolesPermissionsRepository rolesPermissionsRepository;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Permissions addPermission(Permissions permission) {
        return permissionsRepository.save(permission);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Permissions updatePermission(Permissions permission) {
        return permissionsRepository.save(permission);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void deletePermissionById(Long permissionId) {
        if (this.checkPermissionsRolesIfExist(permissionId)) {
            //删除权限与角色的关联关系
            rolesPermissionsRepository.deleteByPermissionsId(permissionId);
        }
        //删除权限
        permissionsRepository.deleteById(permissionId);
    }

    private boolean checkPermissionsRolesIfExist(Long permissionId) {
        return rolesPermissionsRepository.findByPermissionsId(permissionId).isPresent();
    }

    @Override
    public Optional<Permissions> findById(Long permissionId) {
        return permissionsRepository.findById(permissionId);
    }

    @Override
    public List<Permissions> findAllPermissions() {
        return permissionsRepository.findAll();
    }

    //根据角色id查询权限
    @Override
    public List<Permissions> findPermissionsByRoleId(Long roleId) {
        List<Long> permissionsId = rolesPermissionsRepository.findPermissionsIdByRolesId(roleId);
        List<Permissions> permissions = new ArrayList<>();
        for (Long permissionId : permissionsId) {
            permissions.add(permissionsRepository.findById(permissionId).orElseThrow());
        }
        return permissions;
    }
}