/*-
 * #%L
 * JSQLParser library
 * %%
 * Copyright (C) 2004 - 2020 JSQLParser
 * %%
 * Dual licensed under GNU LGPL 2.1 or Apache License 2.0
 * #L%
 */
package net.sf.jsqlparser.util.validation.validator;

import java.util.Arrays;
import net.sf.jsqlparser.JSQLParserException;
import net.sf.jsqlparser.parser.feature.Feature;
import net.sf.jsqlparser.util.validation.ValidationTestAsserts;
import net.sf.jsqlparser.util.validation.feature.DatabaseType;
import net.sf.jsqlparser.util.validation.feature.FeaturesAllowed;
import net.sf.jsqlparser.util.validation.feature.MariaDbVersion;
import org.junit.jupiter.api.Test;

public class SelectValidatorTest extends ValidationTestAsserts {

    @Test
    public void testValidationSelectNotAllowed() throws JSQLParserException {
        String sql = "SELECT 1";
        validateNotAllowed(sql, 1, 1, FeaturesAllowed.DDL, Feature.select);
    }

    @Test
    public void testValidationSelectDistinct() throws JSQLParserException {
        String sql = "SELECT DISTINCT a, b FROM tab";
        validateNoErrors(sql, 1, DatabaseType.DATABASES);
    }

    @Test
    public void testValidationSelectUnique() throws JSQLParserException {
        String sql = "SELECT UNIQUE a, b FROM tab";
        validateNoErrors(sql, 1, DatabaseType.ORACLE, MariaDbVersion.ORACLE_MODE);
    }

    @Test
    public void testValidationFetchAndOffset() throws JSQLParserException {
        for (String sql : Arrays.asList(
                "SELECT * FROM mytable t WHERE t.col = 9 ORDER BY t.id FETCH FIRST 5 ROWS ONLY",
                "SELECT * FROM mytable t WHERE t.col = 9 ORDER BY t.id OFFSET 3 ROWS",
                "SELECT * FROM mytable t WHERE t.col = 9 ORDER BY t.id OFFSET 3 ROWS FETCH NEXT 5 ROWS ONLY")) {
            validateNoErrors(sql, 1, DatabaseType.ORACLE, DatabaseType.SQLSERVER);
        }
    }

    @Test
    public void testValidationUnion() throws JSQLParserException {
        String sql = "SELECT * FROM mytable WHERE mytable.col = 9 UNION " //
                + "SELECT * FROM mytable3 WHERE mytable3.col = ?";
        validateNoErrors(sql, 1, DatabaseType.DATABASES);
    }

    @Test
    public void testValidationSqlIntersect() throws Exception {
        String sql = "(SELECT * FROM a) INTERSECT (SELECT * FROM b)";
        validateNoErrors(sql, 1, DatabaseType.ORACLE, DatabaseType.SQLSERVER, DatabaseType.MARIADB,
                DatabaseType.POSTGRESQL, DatabaseType.H2);
    }

    @Test
    public void testValidationForUpdateWaitWithTimeout() throws JSQLParserException {
        String sql = "SELECT * FROM mytable FOR UPDATE WAIT 60";
        validateNoErrors(sql, 1, DatabaseType.ORACLE, DatabaseType.MARIADB);
    }

    @Test
    public void testValidationForUpdateNoWait() throws JSQLParserException {
        String sql = "SELECT * FROM mytable FOR UPDATE NOWAIT";
        validateNoErrors(sql, 1, DatabaseType.ORACLE, DatabaseType.MARIADB,
                DatabaseType.POSTGRESQL, DatabaseType.MYSQL);
    }

    @Test
    public void testValidationJoinOuterSimple() throws JSQLParserException {
        String sql = "SELECT * FROM foo AS f, OUTER bar AS b WHERE f.id = b.id";
        validateNotSupported(sql, 1, 1, DatabaseType.ORACLE, Feature.joinOuterSimple);
    }

    @Test
    public void testValidationJoin() throws JSQLParserException {
        for (String sql : Arrays.asList("SELECT t1.col, t2.col, t1.id FROM tab1 t1, tab2 t2 WHERE t1.id = t2.id",
                "SELECT t1.col, t2.col, t1.id FROM tab1 t1 JOIN tab2 t2 ON t1.id = t2.id",
                "SELECT t1.col, t2.col, t1.id FROM tab1 t1 INNER JOIN tab2 t2 ON t1.id = t2.id")) {
            validateNoErrors(sql, 1, DatabaseType.DATABASES);
        }
    }

    @Test
    public void testOracleHierarchicalQuery() throws JSQLParserException {
        String sql = "SELECT last_name, employee_id, manager_id, LEVEL FROM employees START WITH employee_id = 100 CONNECT BY PRIOR employee_id = manager_id ORDER SIBLINGS BY last_name";
        validateNoErrors(sql, 1, DatabaseType.ORACLE);
    }

    @Test
    public void testOracleJoin() throws JSQLParserException {
        validateNoErrors("SELECT * FROM tabelle1, tabelle2 WHERE tabelle1.a = tabelle2.b(+)", 1,
                DatabaseType.ORACLE);
    }

    @Test
    public void testValidationLeftRightJoin() throws JSQLParserException {
        for (String sql : Arrays
                .asList("SELECT t1.col, t2.col, t1.id FROM tab1 t1 LEFT JOIN tab2 t2 ON t1.id = t2.id",
                        "SELECT t1.col, t2.col, t1.id FROM tab1 t1 LEFT OUTER JOIN tab2 t2 ON t1.id = t2.id",
                        "SELECT t1.col, t2.col, t1.id FROM tab1 t1 RIGHT JOIN tab2 t2 ON t1.id = t2.id",
                        "SELECT t1.col, t2.col, t1.id FROM tab1 t1 RIGHT OUTER JOIN tab2 t2 ON t1.id = t2.id",
                        "SELECT t1.col, t2.col, t1.id FROM tab1 t1 OUTER JOIN tab2 t2 ON t1.id = t2.id")) {
            validateNoErrors(sql, 1, DatabaseType.DATABASES);
        }
    }

    @Test
    public void testValidationWith() throws JSQLParserException {
        String statement = "WITH DINFO (DEPTNO, AVGSALARY, EMPCOUNT) AS "
                + "(SELECT OTHERS.WORKDEPT, AVG(OTHERS.SALARY), COUNT(*) FROM EMPLOYEE AS OTHERS "
                + "GROUP BY OTHERS.WORKDEPT), DINFOMAX AS (SELECT MAX(AVGSALARY) AS AVGMAX FROM DINFO) "
                + "SELECT THIS_EMP.EMPNO, THIS_EMP.SALARY, DINFO.AVGSALARY, DINFO.EMPCOUNT, DINFOMAX.AVGMAX "
                + "FROM EMPLOYEE AS THIS_EMP INNER JOIN DINFO INNER JOIN DINFOMAX "
                + "WHERE THIS_EMP.JOB = 'SALESREP' AND THIS_EMP.WORKDEPT = DINFO.DEPTNO";
        validateNoErrors(statement, 1, DatabaseType.DATABASES);
    }

    @Test
    public void testValidationWithRecursive() throws JSQLParserException {
        String statement = "WITH RECURSIVE t (n) AS ((SELECT 1) UNION ALL (SELECT n + 1 FROM t WHERE n < 100)) SELECT sum(n) FROM t";
        validateNoErrors(statement, 1, DatabaseType.H2, DatabaseType.MARIADB, DatabaseType.MYSQL,
                DatabaseType.SQLSERVER, DatabaseType.POSTGRESQL);
        validateNotSupported(statement, 1, 1, DatabaseType.ORACLE, Feature.withItemRecursive);
    }

    @Test
    public void testSelectMulipleExpressionList() {
        String sql = "SELECT * FROM mytable WHERE (SSN, SSM) IN (('11111111111111', '22222222222222'))";
        validateNoErrors(sql, 1, DatabaseType.DATABASES);
    }

    @Test
    public void testValidatePivotWithAlias() throws JSQLParserException {
        validateNoErrors(
                "SELECT * FROM (SELECT * FROM mytable LEFT JOIN mytable2 ON Factor_ID = Id) f PIVOT (max(f.value) FOR f.factoryCode IN (ZD, COD, SW, PH))",
                1, DatabaseType.SQLSERVER);
    }

    @Test
    public void testValidatePivotXml() throws JSQLParserException {
        validateNoErrors("SELECT * FROM mytable PIVOT XML (count(a) FOR b IN ('val1'))", 1, DatabaseType.SQLSERVER);
    }

    @Test
    public void testValidateUnPivot() throws JSQLParserException {
        validateNoErrors(
                "select * from pivot_table unpivot (yearly_total for order_mode in (store as 'direct', internet as 'online')) order by year, order_mode",
                1, DatabaseType.SQLSERVER);
    }

    @Test
    public void testValidateSubJoin() throws JSQLParserException {
        validateNoErrors("SELECT * FROM ((tabc c INNER JOIN tabn n ON n.ref = c.id) INNER JOIN taba a ON a.REF = c.id)",
                1, DatabaseType.SQLSERVER);
    }

    @Test
    public void testValidateTableFunction() {
        for (String sql : Arrays.asList("SELECT f2 FROM SOME_FUNCTION()", "SELECT f2 FROM SOME_FUNCTION(1, 'val')")) {
            validateNoErrors(sql, 1, DatabaseType.POSTGRESQL, DatabaseType.H2, DatabaseType.SQLSERVER);
        }
    }

    @Test
    public void testValidateLateral() throws JSQLParserException {
        validateNoErrors(
                "SELECT O.ORDERID, O.CUSTNAME, OL.LINETOTAL FROM ORDERS AS O, LATERAL(SELECT SUM(NETAMT) AS LINETOTAL FROM ORDERLINES AS LINES WHERE LINES.ORDERID = O.ORDERID) AS OL",
                1, DatabaseType.POSTGRESQL, DatabaseType.ORACLE);
    }

    @Test
    public void testValidateIssue1502() throws JSQLParserException {
        validateNoErrors(
                "select b.id, name ,(select name from Blog where name = 'sadf') as name2 "
                + ", category, owner, b.update_time "
                + "from Blog as b "
                + "left join Content "
                + "ON b.id = Content.blog_id "
                + "where name = 'sadf' order by Content.title desc",
                1, DatabaseType.POSTGRESQL);
    }    
}
