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package com.github.wz2cool.dynamic.mybatis.mapper.helper;

import com.github.wz2cool.dynamic.mybatis.mapper.constant.MapperConstants;

/**
 * @author Frank
 */
public class DynamicQuerySqlHelper {
    private DynamicQuerySqlHelper() {
        throw new UnsupportedOperationException();
    }

    public static String getBindFilterParams(boolean isMapUnderscoreToCamelCase) {
        StringBuilder sql = new StringBuilder();
        sql.append("");
        return sql.toString();
    }

    public static String getUpdateBindFilterParams(boolean isMapUnderscoreToCamelCase) {
        StringBuilder sql = new StringBuilder();
        sql.append("");
        return sql.toString();
    }

    public static String getSelectColumnsClause() {
        return String.format(" ${%s.%s} ", MapperConstants.DYNAMIC_QUERY_PARAMS, MapperConstants.SELECT_COLUMNS_EXPRESSION);
    }

    public static String getWhereClause() {
        String newExpression = String.format("%s.%s", MapperConstants.DYNAMIC_QUERY_PARAMS, MapperConstants.WHERE_EXPRESSION);
        return String.format("WHERE ${%s}",
                newExpression, newExpression, newExpression);
    }

    public static String getSortClause() {
        String newExpression = String.format("%s.%s", MapperConstants.DYNAMIC_QUERY_PARAMS, MapperConstants.SORT_EXPRESSION);
        return String.format("ORDER BY ${%s}",
                newExpression, newExpression, newExpression);
    }

    public static String getSetClause() {
        String newExpression = String.format("%s.%s", MapperConstants.DYNAMIC_QUERY_PARAMS, MapperConstants.SET_EXPRESSION);
        return String.format("SET ${%s}",
                newExpression, newExpression, newExpression);
    }

    public static String getSelectMax() {
        return String.format("SELECT MAX(${%s})", MapperConstants.COLUMN);
    }

    public static String getSelectMin() {
        return String.format("SELECT MIN(${%s})", MapperConstants.COLUMN);
    }

    public static String getSelectSum() {
        return String.format("SELECT SUM(${%s})", MapperConstants.COLUMN);
    }

    public static String getSelectAvg() {
        return String.format("SELECT AVG(${%s})", MapperConstants.COLUMN);
    }
}