package com.ruoyi.common.datascope.aspect;

import com.ruoyi.common.datascope.context.DataScopeContextHolder;
import com.usky.system.domain.SysUserVO;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;
import com.usky.common.core.utils.StringUtils;
import com.usky.common.core.bean.BaseEntity;
import com.ruoyi.common.datascope.annotation.DataScope;
import com.usky.common.security.utils.SecurityUtils;
import com.usky.system.domain.SysRoleVO;
import com.usky.system.model.LoginUser;

import java.util.Map;

/**
 * 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
    {
        clearDataScope(point);
        handleDataScope(point, controllerDataScope);
    }

    protected void handleDataScope(final JoinPoint joinPoint, DataScope controllerDataScope)
    {
        // 获取当前的用户
        LoginUser loginUser = SecurityUtils.getLoginUser();
        if (StringUtils.isNotNull(loginUser))
        {
            SysUserVO currentUser = loginUser.getSysUser();
            // 如果是超级管理员，则不过滤数据
            if (StringUtils.isNotNull(currentUser) && !currentUser.isAdmin())
            {
                dataScopeFilter(joinPoint, currentUser, controllerDataScope.deptAlias(),
                        controllerDataScope.userAlias());
            }
        }
    }

    /**
     * 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, SysUserVO user, String deptAlias, String userAlias)
    {
        StringBuilder sqlString = new StringBuilder();
        StringBuilder sqlLambda = new StringBuilder();
        for (SysRoleVO role : user.getRoles())
        {
            String dataScope = role.getDataScope();
            if (DATA_SCOPE_ALL.equals(dataScope))
            {
                Integer tenantId = SecurityUtils.getTenantId();
                sqlString.append(StringUtils.format(" OR {}.tenant_id = {} ", deptAlias, tenantId));
                sqlLambda.append(StringUtils.format(" OR tenant_id = {} ",  tenantId));
            }
            else if (DATA_SCOPE_CUSTOM.equals(dataScope))
            {
                sqlString.append(StringUtils.format(" OR {}.dept_id IN ( SELECT dept_id FROM sys_role_dept WHERE role_id = {} ) ", deptAlias, role.getRoleId()));
                sqlLambda.append(StringUtils.format(" OR dept_id IN ( SELECT dept_id FROM sys_role_dept WHERE role_id = {} ) ", role.getRoleId()));
            }
            else if (DATA_SCOPE_DEPT.equals(dataScope))
            {
                sqlString.append(StringUtils.format(" OR {}.dept_id = {} ", deptAlias, user.getDeptId()));
                sqlLambda.append(StringUtils.format(" OR dept_id = {} ", user.getDeptId()));
            }
            else if (DATA_SCOPE_DEPT_AND_CHILD.equals(dataScope))
            {
                sqlString.append(StringUtils.format( " OR {}.dept_id IN ( SELECT dept_id FROM sys_dept WHERE dept_id = {} or find_in_set( {} , ancestors ) )", deptAlias, user.getDeptId(), user.getDeptId()));
                sqlLambda.append(StringUtils.format( " OR dept_id IN ( SELECT dept_id FROM sys_dept WHERE dept_id = {} or find_in_set( {} , ancestors ) )",  user.getDeptId(), user.getDeptId()));
            }
            else if (DATA_SCOPE_SELF.equals(dataScope))
            {
                if (StringUtils.isNotBlank(userAlias)) {
                    sqlString.append(StringUtils.format(" OR {}.create_by = '{}' ", userAlias, user.getUserName()));
                    sqlLambda.append(StringUtils.format(" OR create_by = '{}' ", user.getUserName()));
                } else {
                    // 数据权限为仅本人且没有userAlias别名不查询任何数据
                    sqlString.append(" OR 1=0 ");
                    sqlLambda.append(StringUtils.format(" OR create_by = '{}' ", user.getUserName()));
                }
            }
        }

        if (StringUtils.isNotBlank(sqlString.toString()) && (joinPoint.getArgs().length>0))
        {
            Object params = joinPoint.getArgs()[0];
            if (StringUtils.isNotNull(params) && params instanceof BaseEntity)
            {
                BaseEntity baseEntity = (BaseEntity) params;
                baseEntity.getParams().put(DATA_SCOPE, " AND (" + sqlString.substring(4) + ")");
            }
        }
        if(StringUtils.isNotBlank(sqlLambda.toString())){
            DataScopeContextHolder.setDataScopeSql(" (" + sqlLambda.substring(4) + ")");
        }


    }

    /**
     * 拼接权限sql前先清空params.dataScope参数防止注入
     */
    private void clearDataScope(final JoinPoint joinPoint)
    {
        if(joinPoint.getArgs().length>0){
            Object params = joinPoint.getArgs()[0];
            if (StringUtils.isNotNull(params) && params instanceof BaseEntity)
            {
                BaseEntity baseEntity = (BaseEntity) params;
                baseEntity.getParams().put(DATA_SCOPE, "");
            }
        }
    }
}
