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package com.easy.query.db2.func;

import com.easy.query.core.enums.SQLLikeEnum;
import com.easy.query.core.expression.lambda.SQLExpression1;
import com.easy.query.core.expression.parser.core.SQLTableOwner;
import com.easy.query.core.func.SQLFuncImpl;
import com.easy.query.core.func.SQLFunction;
import com.easy.query.core.func.column.ColumnExpression;
import com.easy.query.core.func.column.ColumnFuncSelector;
import com.easy.query.core.func.def.DistinctDefaultSQLFunction;
import com.easy.query.core.func.def.enums.DateTimeDurationEnum;
import com.easy.query.core.func.def.enums.DateTimeUnitEnum;
import com.easy.query.core.func.def.enums.MathMethodEnum;
import com.easy.query.core.func.def.enums.TimeUnitEnum;

import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * create time 2023/10/13 18:16
 * 文件说明
 *
 * @author xuejiaming
 */
public class DB2FuncImpl extends SQLFuncImpl {
    @Override
    public SQLFunction nullOrDefault(SQLExpression1 sqlExpression) {
        return new DB2NullDefaultSQLFunction(getColumnExpressions(sqlExpression));
    }

    @Override
    public SQLFunction concat(List concatExpressions) {
        return new DB2ConcatSQLFunction(concatExpressions);
    }
//    @Override
//    public SQLFunction join(String separator, List concatExpressions) {
//        return new PgSQLStringJoinSQLFunction(separator, concatExpressions);
//    }

    @Override
    public SQLFunction now() {
        return DB2NowSQLFunction.INSTANCE;
    }

    @Override
    public SQLFunction utcNow() {
        return DB2UtcNowSQLFunction.INSTANCE;
    }

    @Override
    public DistinctDefaultSQLFunction sum(SQLExpression1 sqlExpression) {
        return new DB2SumSQLFunction(getColumnExpressions(sqlExpression));
    }

    @Override
    public DistinctDefaultSQLFunction count(SQLExpression1 sqlExpression) {
        return new DB2CountSQLFunction(getColumnExpressions(sqlExpression));
    }

    @Override
    public DistinctDefaultSQLFunction avg(SQLExpression1 sqlExpression) {
        return new DB2AvgSQLFunction(getColumnExpressions(sqlExpression));
    }

    @Override
    public SQLFunction join(SQLExpression1 sqlExpression, boolean distinct) {
        return new DB2JoinSQLFunction(getColumnExpressions(sqlExpression),distinct);
    }

    @Override
    public SQLFunction cast(SQLExpression1 sqlExpression, Class targetClazz) {
        return new DB2CastSQLFunction(getColumnExpressions(sqlExpression), targetClazz);
    }
}