/*-
 * #%L
 * JSQLParser library
 * %%
 * Copyright (C) 2004 - 2019 JSQLParser
 * %%
 * Dual licensed under GNU LGPL 2.1 or Apache License 2.0
 * #L%
 */
package net.sf.jsqlparser.statement;

import java.util.Arrays;
import java.util.List;
import net.sf.jsqlparser.JSQLParserException;
import net.sf.jsqlparser.expression.NotExpression;
import net.sf.jsqlparser.parser.CCJSqlParserUtil;
import net.sf.jsqlparser.test.TestUtils;
import net.sf.jsqlparser.util.TablesNamesFinder;
import net.sf.jsqlparser.util.validation.Validation;
import net.sf.jsqlparser.util.validation.ValidationError;
import net.sf.jsqlparser.util.validation.ValidationTestAsserts;
import net.sf.jsqlparser.util.validation.feature.DatabaseType;
import net.sf.jsqlparser.util.validation.feature.FeaturesAllowed;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import org.junit.jupiter.api.Test;

/**
 *
 * @author <a href="mailto:andreas@manticore-projects.com">Andreas Reichel</a>
 */
public class IfElseStatementTest {

    @Test
    public void testSimpleIfElseStatement() throws Exception {
        TestUtils.assertSqlCanBeParsedAndDeparsed(
                "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin", true);
        TestUtils.assertSqlCanBeParsedAndDeparsed(
                "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin;", true);
        TestUtils.assertSqlCanBeParsedAndDeparsed(
                "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin; ELSE CREATE TABLE tOrigin (ID VARCHAR(40));",
                true);
    }

    @Test
    public void testIfElseStatements1() throws Exception {
        String sqlStr =
                "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin1; ELSE CREATE TABLE tOrigin1 (ID VARCHAR (40));\n"
                        + "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin2; ELSE CREATE TABLE tOrigin2 (ID VARCHAR (40));\n"
                        + "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin3; ELSE CREATE TABLE tOrigin3 (ID VARCHAR (40));\n";

        Statements result = CCJSqlParserUtil.parseStatements(sqlStr);
        assertEquals(sqlStr, result.toString());
    }

    @Test
    public void testIfElseStatements2() throws Exception {
        String sqlStr = "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin1;\n"
                + "CREATE TABLE tOrigin2 (ID VARCHAR (40));\n"
                + "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin3; ELSE CREATE TABLE tOrigin3 (ID VARCHAR (40));\n";

        Statements result = CCJSqlParserUtil.parseStatements(sqlStr);
        assertEquals(sqlStr, result.toString());
    }

    @Test
    public void testObjectBuilder() throws JSQLParserException {
        Statement ifStatement = CCJSqlParserUtil.parse("SELECT * from dual");
        Statement elseStatement = CCJSqlParserUtil.parse("SELECT * from dual");

        IfElseStatement ifElseStatement = new IfElseStatement(new NotExpression(), ifStatement);
        ifElseStatement.setUsingSemicolonForIfStatement(true);

        ifElseStatement.setElseStatement(elseStatement);
        ifElseStatement.setUsingSemicolonForElseStatement(true);

        assertEquals(ifElseStatement.isUsingSemicolonForIfStatement(),
                ifElseStatement.isUsingSemicolonForElseStatement());
        assertEquals(ifElseStatement.getIfStatement().toString(),
                ifElseStatement.getElseStatement().toString());

        assertNotNull(ifElseStatement.getCondition());
    }

    @Test
    public void testValidation() {
        String sqlStr = "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin1;";
        List<ValidationError> errors = Validation
                .validate(Arrays.asList(DatabaseType.SQLSERVER, FeaturesAllowed.DROP), sqlStr);
        ValidationTestAsserts.assertErrorsSize(errors, 0);
    }

    @Test
    public void testTableNames() throws JSQLParserException {
        String sql = "IF OBJECT_ID('tOrigin', 'U') IS NOT NULL DROP TABLE tOrigin1;";
        Statement stmt = CCJSqlParserUtil.parse(sql);
        TablesNamesFinder tablesNamesFinder = new TablesNamesFinder();
        List<String> tableList = tablesNamesFinder.getTableList(stmt);
        assertEquals(1, tableList.size());
        assertTrue(tableList.contains("tOrigin1"));
    }
}
