package com.hx.mybatisTool;

import com.hx.util.StringUtils;

import java.util.List;
import java.util.Map;

/**
 * Sql工具类
 * @author fwq
 */
public class SqlStringTool {

    /**基础key*/
    private static final String BASE_KEY = "k";
    /**AND符号*/
    private static final String AND_STR = " AND ";
    /**左边括号拼接*/
    private static final String LEFT_STR = "#{m.";
    /**右边括号拼接*/
    private static final String RIGHT_STR = "}";
    /**逗号分隔*/
    private static final String SIGN_STR = ",";
    /**IN左符号*/
    private static final String IN_LEFT = " IN ( ";
    /**IN右符号*/
    private static final String IN_RIGHT = " ) ";

    /**
     * 递归key,直到不重复,这个递归是针对同一个sqlMap,防止同方法多个查询时存在key覆盖问题。
     * PS:建议查询完上一次,清理sqlMap后再传递进来,减少递归的操作
     */
    private static String getKey(String key, Map<String, Object> sqlMap) {
        if (sqlMap.get(key) != null) {
            getKey(BASE_KEY + key, sqlMap);
        }
        return key;
    }

    /**
     * 拼接sql语句
     * @param sql         StringBuilder的sql语句
     * @param tableColumn 含别名表字段,例如:user AS u 根据id查询时传递u.id
     * @param dataList    要循环的数值,List集合
     * @param sqlMap      sql语句对应的参数Map
     */
    public static void handleList(StringBuilder sql, String tableColumn, List<String> dataList, Map<String, Object> sqlMap) {
        if (sql == null || StringUtils.isEmpty(tableColumn) || dataList == null || dataList.size() < 1) {
            return;
        }
        String key = null;
        sql.append(AND_STR).append(tableColumn).append(IN_LEFT);
        for (int i = 0; i < dataList.size(); i++) {
            key = getKey(BASE_KEY + i, sqlMap);
            sql.append(LEFT_STR).append(key).append(RIGHT_STR).append(SIGN_STR);
            sqlMap.put(key, dataList.get(i));
        }
        sql.deleteCharAt(sql.length() - 1).append(IN_RIGHT);
    }


    /**
     * 拼接sql语句
     * @param sql         StringBuffer的sql语句
     * @param tableColumn 含别名表字段,例如:user AS u 根据id查询时传递u.id
     * @param dataList    要循环的数值,List集合
     * @param sqlMap      sql语句对应的参数Map
     */
    public static void handleList(StringBuffer sql, String tableColumn, List<String> dataList, Map<String, Object> sqlMap) {
        if (sql == null || StringUtils.isEmpty(tableColumn) || dataList == null || dataList.size() < 1) {
            return;
        }
        String key = null;
        sql.append(AND_STR).append(tableColumn).append(IN_LEFT);
        for (int i = 0; i < dataList.size(); i++) {
            key = getKey(BASE_KEY + i, sqlMap);
            sql.append(LEFT_STR).append(key).append(RIGHT_STR).append(SIGN_STR);
            sqlMap.put(key, dataList.get(i));
        }
        sql.deleteCharAt(sql.length() - 1).append(IN_RIGHT);
    }

    /**
     * 拼接sql语句
     * @param sql         StringBuilder的sql语句
     * @param tableColumn 含别名表字段,例如:user AS u 根据id查询时传递u.id
     * @param dataList    要循环的数值,String数组
     * @param sqlMap      sql语句对应的参数Map
     */
    public static void handleList(StringBuilder sql, String tableColumn, String[] dataList, Map<String, Object> sqlMap) {
        if (sql == null || StringUtils.isEmpty(tableColumn) || dataList == null || dataList.length < 1) {
            return;
        }
        String key = null;
        sql.append(AND_STR).append(tableColumn).append(IN_LEFT);
        for (int i = 0; i < dataList.length; i++) {
            key = getKey(BASE_KEY + i, sqlMap);
            sql.append(LEFT_STR).append(key).append(RIGHT_STR).append(SIGN_STR);
            sqlMap.put(key, dataList[i]);
        }
        sql.deleteCharAt(sql.length() - 1).append(IN_RIGHT);
    }

    /**
     * 拼接sql语句
     * @param sql         StringBuffer的sql语句
     * @param tableColumn 含别名表字段,例如:user AS u 根据id查询时传递u.id
     * @param dataList    要循环的数值,String数组
     * @param sqlMap      sql语句对应的参数Map
     */
    public static void handleList(StringBuffer sql, String tableColumn, String[] dataList, Map<String, Object> sqlMap) {
        if (sql == null || StringUtils.isEmpty(tableColumn) || dataList == null || dataList.length < 1) {
            return;
        }
        String key = null;
        sql.append(AND_STR).append(tableColumn).append(IN_LEFT);
        for (int i = 0; i < dataList.length; i++) {
            key = getKey(BASE_KEY + i, sqlMap);
            sql.append(LEFT_STR).append(key).append(RIGHT_STR).append(SIGN_STR);
            sqlMap.put(key, dataList[i]);
        }
        sql.deleteCharAt(sql.length() - 1).append(IN_RIGHT);
    }

    /**
     * 拼接sql语句
     * @param sql         StringBuilder的sql语句
     * @param tableColumn 含别名表字段,例如:user AS u 根据id查询时传递u.id
     * @param dataList    要循环的数值,Map数组对象
     * @param dataListKey Map数组对象中要循环值对应的key
     * @param sqlMap      sql语句对应的参数Map
     */
    public static void handleList(StringBuilder sql, String tableColumn, List<Map<String, Object>> dataList, String dataListKey, Map<String, Object> sqlMap) {
        if (sql == null || StringUtils.isEmpty(tableColumn) || dataList == null || dataList.size() < 1) {
            return;
        }
        String key = null;
        sql.append(AND_STR).append(tableColumn).append(IN_LEFT);
        for (int i = 0; i < dataList.size(); i++) {
            key = getKey(BASE_KEY + i, sqlMap);
            sql.append(LEFT_STR).append(key).append(RIGHT_STR).append(SIGN_STR);
            sqlMap.put(key, dataList.get(i).get(dataListKey));
        }
        sql.deleteCharAt(sql.length() - 1).append(IN_RIGHT);
    }

    /**
     * 拼接sql语句
     * @param sql         StringBuffer的sql语句
     * @param tableColumn 含别名表字段,例如:user AS u 根据id查询时传递u.id
     * @param dataList    要循环的数值,Map数组对象
     * @param dataListKey Map数组对象中要循环值对应的key
     * @param sqlMap      sql语句对应的参数Map
     */
    public static void handleList(StringBuffer sql, String tableColumn, List<Map<String, Object>> dataList, String dataListKey, Map<String, Object> sqlMap) {
        if (sql == null || StringUtils.isEmpty(tableColumn) || dataList == null || dataList.size() < 1) {
            return;
        }
        String key = null;
        sql.append(AND_STR).append(tableColumn).append(IN_LEFT);
        for (int i = 0; i < dataList.size(); i++) {
            key = getKey(BASE_KEY + i, sqlMap);
            sql.append(LEFT_STR).append(key).append(RIGHT_STR).append(SIGN_STR);
            sqlMap.put(key, dataList.get(i).get(dataListKey));
        }
        sql.deleteCharAt(sql.length() - 1).append(IN_RIGHT);
    }


}