package com.qiaoba.auth.aspectj;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
import com.qiaoba.auth.annotation.DataScope;
import com.qiaoba.auth.entity.LoginUser;
import com.qiaoba.auth.entity.dto.RoleDto;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;

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

/**
 * 数据过滤处理
 *
 * @author ruoyi
 */
@Aspect
@Component
public class DataScopeAspect {
    /**
     * 全部数据权限
     */
    public static final String DATA_SCOPE_ALL = "1";

    /**
     * 自定数据权限
     */
    public static final String DATA_SCOPE_CUSTOM = "2";

    /**
     * 部门数据权限
     */
    public static final String DATA_SCOPE_DEPT = "3";

    /**
     * 部门及以下数据权限
     */
    public static final String DATA_SCOPE_DEPT_AND_CHILD = "4";

    /**
     * 仅本人数据权限
     */
    public static final String DATA_SCOPE_SELF = "5";

    /**
     * 数据权限过滤关键字
     */
    public static final String DATA_SCOPE = "dataScope";

    @Before("@annotation(controllerDataScope)")
    public void doBefore(JoinPoint point, DataScope controllerDataScope) throws Throwable {

    }

    /**
     * 数据范围过滤
     *
     * @param joinPoint  切点
     * @param user       用户
     * @param deptAlias  部门别名
     * @param userAlias  用户别名
     */
    public static void dataScopeFilter(JoinPoint joinPoint, LoginUser user, String deptAlias, String userAlias) {
        StringBuilder sqlString = new StringBuilder();
        List<String> conditions = new ArrayList<String>();

        for (RoleDto role : user.getRoles()) {
            String dataScope = role.getDataScope();
            if (!DATA_SCOPE_CUSTOM.equals(dataScope) && conditions.contains(dataScope)) {
                continue;
            }

            if (DATA_SCOPE_ALL.equals(dataScope)) {
                sqlString = new StringBuilder();
                conditions.add(dataScope);
                break;
            } else if (DATA_SCOPE_CUSTOM.equals(dataScope)) {
                sqlString.append(StrUtil.format(
                        " OR {}.dept_id IN ( SELECT dept_id FROM sys_role_dept WHERE role_id = {} ) ", deptAlias,
                        role.getRoleId()));
            } else if (DATA_SCOPE_DEPT.equals(dataScope)) {
                sqlString.append(StrUtil.format(" OR {}.dept_id = {} ", deptAlias, user.getDeptId()));
            } else if (DATA_SCOPE_DEPT_AND_CHILD.equals(dataScope)) {
                sqlString.append(StrUtil.format(
                        // todo
                        " OR {}.dept_id IN ( SELECT dept_id FROM sys_dept WHERE dept_id = {} or {} )",
                        deptAlias, user.getDeptId(), user.getDeptId()));
            } else if (DATA_SCOPE_SELF.equals(dataScope)) {
                if (StrUtil.isNotBlank(userAlias)) {
                    sqlString.append(StrUtil.format(" OR {}.user_id = {} ", userAlias, user.getUserId()));
                } else {
                    // 数据权限为仅本人且没有userAlias别名不查询任何数据
                    sqlString.append(StrUtil.format(" OR {}.dept_id = 0 ", deptAlias));
                }
            }
            conditions.add(dataScope);
        }

        // 多角色情况下，所有角色都不包含传递过来的权限字符，这个时候sqlString也会为空，所以要限制一下,不查询任何数据
        if (CollUtil.isEmpty(conditions)) {
            sqlString.append(StrUtil.format(" OR {}.dept_id = 0 ", deptAlias));
        }
//find_in_set( {} , ancestors )
    }

}