/**
 * Copyright &copy; 2012-2014 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved.
 */
package com.ejweb.core.service;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.transaction.annotation.Transactional;

import com.google.common.collect.Lists;
import com.ejweb.core.persistence.BaseEntity;
import com.ejweb.core.utils.StringUtils;
import com.ejweb.modules.sys.entity.Role;
import com.ejweb.modules.sys.entity.User;

/**
 * Service基类
 * @author ThinkGem
 * @version 2014-05-16
 */
@Transactional(readOnly = true)
public abstract class BaseService {
    
    /**
     * 日志对象
     */
    protected Logger logger = LoggerFactory.getLogger(getClass());

    /**
     * 数据范围过滤
     * @param user 当前用户对象，通过“entity.getCurrentUser()”获取
     * @param officeAlias 机构表别名，多个用“,”逗号隔开。
     * @param userAlias 用户表别名，多个用“,”逗号隔开，传递空，忽略此参数
     * @return 标准连接条件对象
     */
    public static String dataScopeFilter(User user, String officeAlias, String userAlias) {

        StringBuilder sqlString = new StringBuilder();
        
        // 进行权限过滤，多个角色权限范围之间为或者关系。
        List<String> dataScope = Lists.newArrayList();
        
        // 超级管理员，跳过权限过滤
        if (!user.isAdmin()){
            boolean isDataScopeAll = false;
            for (Role r : user.getRoleList()){
                for (String oa : StringUtils.split(officeAlias, ",")){
                    if (!dataScope.contains(r.getDataScope()) && StringUtils.isNotBlank(oa)){
                        if (Role.DATA_SCOPE_ALL.equals(r.getDataScope())){
                            isDataScopeAll = true;
                        }
                        else if (Role.DATA_SCOPE_COMPANY_AND_CHILD.equals(r.getDataScope())){
                            sqlString.append(" OR " + oa + ".id = '" + user.getCompany().getId() + "'");
                            sqlString.append(" OR " + oa + ".parent_ids LIKE '" + user.getCompany().getParentIds() + user.getCompany().getId() + ",%'");
                        }
                        else if (Role.DATA_SCOPE_COMPANY.equals(r.getDataScope())){
                            sqlString.append(" OR " + oa + ".id = '" + user.getCompany().getId() + "'");
                            // 包括本公司下的部门 （type=1:公司；type=2：部门）
                            sqlString.append(" OR (" + oa + ".parent_id = '" + user.getCompany().getId() + "' AND " + oa + ".type = '2')");
                        }
                        else if (Role.DATA_SCOPE_OFFICE_AND_CHILD.equals(r.getDataScope())){
                            sqlString.append(" OR " + oa + ".id = '" + user.getOffice().getId() + "'");
                            sqlString.append(" OR " + oa + ".parent_ids LIKE '" + user.getOffice().getParentIds() + user.getOffice().getId() + ",%'");
                        }
                        else if (Role.DATA_SCOPE_OFFICE.equals(r.getDataScope())){
                            sqlString.append(" OR " + oa + ".id = '" + user.getOffice().getId() + "'");
                        }
                        else if (Role.DATA_SCOPE_CUSTOM.equals(r.getDataScope())){
//                            String officeIds =  StringUtils.join(r.getOfficeIdList(), "','");
//                            if (StringUtils.isNotEmpty(officeIds)){
//                                sqlString.append(" OR " + oa + ".id IN ('" + officeIds + "')");
//                            }
                            sqlString.append(" OR EXISTS (SELECT 1 FROM ct_bbtc_sys_role_office WHERE role_id = '" + r.getId() + "'");
                            sqlString.append(" AND office_id = " + oa +".id)");
                        }
                        //else if (Role.DATA_SCOPE_SELF.equals(r.getDataScope())){
                        dataScope.add(r.getDataScope());
                    }
                }
            }
            // 如果没有全部数据权限，并设置了用户别名，则当前权限为本人；如果未设置别名，当前无权限为已植入权限
            if (!isDataScopeAll){
                if (StringUtils.isNotBlank(userAlias)){
                    for (String ua : StringUtils.split(userAlias, ",")){
                        sqlString.append(" OR " + ua + ".id = '" + user.getId() + "'");
                    }
                }else {
                    for (String oa : StringUtils.split(officeAlias, ",")){
                        //sqlString.append(" OR " + oa + ".id  = " + user.getOffice().getId());
                        sqlString.append(" OR " + oa + ".id IS NULL");
                    }
                }
            }else{
                // 如果包含全部权限，则去掉之前添加的所有条件，并跳出循环。
                sqlString = new StringBuilder();
            }
        }
        if (StringUtils.isNotBlank(sqlString.toString())){
            return " AND (" + sqlString.substring(4) + ")";
        }
        return "";
    }

    /**
     * 数据范围过滤（符合业务表字段不同的时候使用，采用exists方法）
     * @param entity 当前过滤的实体类
     * @param sqlMapKey sqlMap的键值，例如设置“dsf”时，调用方法：${sqlMap.sdf}
     * @param officeWheres office表条件，组成：部门表字段=业务表的部门字段
     * @param userWheres user表条件，组成：用户表字段=业务表的用户字段
     * @example
     *         dataScopeFilter(user, "dsf", "id=a.office_id", "id=a.create_by");
     *         dataScopeFilter(entity, "dsf", "code=a.jgdm", "no=a.cjr"); // 适应于业务表关联不同字段时使用，如果关联的不是机构id是code。
     */
    public static void dataScopeFilter(BaseEntity<?> entity, String sqlMapKey, String officeWheres, String userWheres) {

        User user = entity.getCurrentUser();
        
        // 如果是超级管理员，则不过滤数据
        if (user.isAdmin()) {
            return;
        }

        // 数据范围（1：所有数据；2：所在公司及以下数据；3：所在公司数据；4：所在部门及以下数据；5：所在部门数据；8：仅本人数据；9：按明细设置）
        StringBuilder sqlString = new StringBuilder();
        
        // 获取到最大的数据权限范围
        String roleId = "";
        int dataScopeInteger = 8;
        for (Role r : user.getRoleList()){
            int ds = Integer.valueOf(r.getDataScope());
            if (ds == 9){
                roleId = r.getId();
                dataScopeInteger = ds;
                break;
            }else if (ds < dataScopeInteger){
                roleId = r.getId();
                dataScopeInteger = ds;
            }
        }
        String dataScopeString = String.valueOf(dataScopeInteger);
        
        // 生成部门权限SQL语句
        for (String where : StringUtils.split(officeWheres, ",")){
            if (Role.DATA_SCOPE_COMPANY_AND_CHILD.equals(dataScopeString)){
                // 包括本公司下的部门 （type=1:公司；type=2：部门）
                sqlString.append(" AND EXISTS (SELECT 1 FROM SYS_OFFICE");
                sqlString.append(" WHERE type='2'");
                sqlString.append(" AND (id = '" + user.getCompany().getId() + "'");
                sqlString.append(" OR parent_ids LIKE '" + user.getCompany().getParentIds() + user.getCompany().getId() + ",%')");
                sqlString.append(" AND " + where +")");
            }
            else if (Role.DATA_SCOPE_COMPANY.equals(dataScopeString)){
                sqlString.append(" AND EXISTS (SELECT 1 FROM SYS_OFFICE");
                sqlString.append(" WHERE type='2'");
                sqlString.append(" AND id = '" + user.getCompany().getId() + "'");
                sqlString.append(" AND " + where +")");
            }
            else if (Role.DATA_SCOPE_OFFICE_AND_CHILD.equals(dataScopeString)){
                sqlString.append(" AND EXISTS (SELECT 1 FROM SYS_OFFICE");
                sqlString.append(" WHERE (id = '" + user.getOffice().getId() + "'");
                sqlString.append(" OR parent_ids LIKE '" + user.getOffice().getParentIds() + user.getOffice().getId() + ",%')");
                sqlString.append(" AND " + where +")");
            }
            else if (Role.DATA_SCOPE_OFFICE.equals(dataScopeString)){
                sqlString.append(" AND EXISTS (SELECT 1 FROM SYS_OFFICE");
                sqlString.append(" WHERE id = '" + user.getOffice().getId() + "'");
                sqlString.append(" AND " + where +")");
            }
            else if (Role.DATA_SCOPE_CUSTOM.equals(dataScopeString)){
                sqlString.append(" AND EXISTS (SELECT 1 FROM ct_bbtc_sys_role_office ro123456, ct_bbtc_sys_office o123456");
                sqlString.append(" WHERE ro123456.office_id = o123456.id");
                sqlString.append(" AND ro123456.role_id = '" + roleId + "'");
                sqlString.append(" AND o123456." + where +")");
            }
        }
        // 生成个人权限SQL语句
        for (String where : StringUtils.split(userWheres, ",")){
            if (Role.DATA_SCOPE_SELF.equals(dataScopeString)){
                sqlString.append(" AND EXISTS (SELECT 1 FROM ct_bbtc_sys_user");
                sqlString.append(" WHERE id='" + user.getId() + "'");
                sqlString.append(" AND " + where + ")");
            }
        }

//        System.out.println("dataScopeFilter: " + sqlString.toString());

        // 设置到自定义SQL对象
        entity.getSqlMap().put(sqlMapKey, sqlString.toString());
        
    }

}
