<?php

namespace Doctrine\Tests\DBAL\Platforms;

use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
use Doctrine\DBAL\Types\Type;
use Doctrine\DBAL\Connection;

require_once __DIR__ . '/../../TestInit.php';
 
class PostgreSqlPlatformTest extends AbstractPlatformTestCase
{
    public function createPlatform()
    {
        return new PostgreSqlPlatform;
    }

    public function getGenerateTableSql()
    {
        return 'CREATE TABLE test (id SERIAL NOT NULL, test VARCHAR(255) DEFAULT NULL, PRIMARY KEY(id))';
    }

    public function getGenerateAlterTableSql()
    {
        return array(
            'ALTER TABLE mytable ADD quota INT DEFAULT NULL',
            'ALTER TABLE mytable RENAME TO userlist',
        );
    }

    public function getGenerateIndexSql()
    {
        return 'CREATE INDEX my_idx ON mytable (user_name, last_login)';
    }

    public function getGenerateForeignKeySql()
    {
        return 'ALTER TABLE test ADD FOREIGN KEY (fk_name_id) REFERENCES other_table(id) NOT DEFERRABLE INITIALLY IMMEDIATE';
    }

    public function testGeneratesForeignKeySqlForNonStandardOptions()
    {
        $foreignKey = new \Doctrine\DBAL\Schema\ForeignKeyConstraint(
                array('foreign_id'), 'my_table', array('id'), 'my_fk', array('onDelete' => 'CASCADE')
        );
        $this->assertEquals(
            "CONSTRAINT my_fk FOREIGN KEY (foreign_id) REFERENCES my_table(id) ON DELETE CASCADE NOT DEFERRABLE INITIALLY IMMEDIATE",
            $this->_platform->getForeignKeyDeclarationSql($foreignKey)
        );
    }

    public function testGeneratesSqlSnippets()
    {
        $this->assertEquals('SIMILAR TO', $this->_platform->getRegexpExpression(), 'Regular expression operator is not correct');
        $this->assertEquals('"', $this->_platform->getIdentifierQuoteCharacter(), 'Identifier quote character is not correct');
        $this->assertEquals('RANDOM()', $this->_platform->getRandomExpression(), 'Random function is not correct');
        $this->assertEquals('column1 || column2 || column3', $this->_platform->getConcatExpression('column1', 'column2', 'column3'), 'Concatenation expression is not correct');
        $this->assertEquals('SUBSTR(column, 5)', $this->_platform->getSubstringExpression('column', 5), 'Substring expression without length is not correct');
        $this->assertEquals('SUBSTR(column, 0, 5)', $this->_platform->getSubstringExpression('column', 0, 5), 'Substring expression with length is not correct');
    }

    public function testGeneratesTransactionCommands()
    {
        $this->assertEquals(
            'SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL READ UNCOMMITTED',
            $this->_platform->getSetTransactionIsolationSql(Connection::TRANSACTION_READ_UNCOMMITTED)
        );
        $this->assertEquals(
            'SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL READ COMMITTED',
            $this->_platform->getSetTransactionIsolationSql(Connection::TRANSACTION_READ_COMMITTED)
        );
        $this->assertEquals(
            'SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL REPEATABLE READ',
            $this->_platform->getSetTransactionIsolationSql(Connection::TRANSACTION_REPEATABLE_READ)
        );
        $this->assertEquals(
            'SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL SERIALIZABLE',
            $this->_platform->getSetTransactionIsolationSql(Connection::TRANSACTION_SERIALIZABLE)
        );
    }

    public function testGeneratesDDLSnippets()
    {
        $this->assertEquals('CREATE DATABASE foobar', $this->_platform->getCreateDatabaseSql('foobar'));
        $this->assertEquals('DROP DATABASE foobar', $this->_platform->getDropDatabaseSql('foobar'));
        $this->assertEquals('DROP TABLE foobar', $this->_platform->getDropTableSql('foobar'));
    }

    public function testGeneratesTypeDeclarationForIntegers()
    {
        $this->assertEquals(
            'INT',
            $this->_platform->getIntegerTypeDeclarationSql(array())
        );
        $this->assertEquals(
            'SERIAL',
            $this->_platform->getIntegerTypeDeclarationSql(array('autoincrement' => true)
        ));
        $this->assertEquals(
            'SERIAL',
            $this->_platform->getIntegerTypeDeclarationSql(
                array('autoincrement' => true, 'primary' => true)
        ));
    }

    public function testGeneratesTypeDeclarationForStrings()
    {
        $this->assertEquals(
            'CHAR(10)',
            $this->_platform->getVarcharTypeDeclarationSql(
                array('length' => 10, 'fixed' => true))
        );
        $this->assertEquals(
            'VARCHAR(50)',
            $this->_platform->getVarcharTypeDeclarationSql(array('length' => 50)),
            'Variable string declaration is not correct'
        );
        $this->assertEquals(
            'TEXT',
            $this->_platform->getVarcharTypeDeclarationSql(array()),
            'Long string declaration is not correct'
        );
    }

    public function getGenerateUniqueIndexSql()
    {
        return 'CREATE UNIQUE INDEX index_name ON test (test, test2)';
    }

    public function testGeneratesSequenceSqlCommands()
    {
        $sequence = new \Doctrine\DBAL\Schema\Sequence('myseq', 20, 1);
        $this->assertEquals(
            'CREATE SEQUENCE myseq INCREMENT BY 20 MINVALUE 1 START 1',
            $this->_platform->getCreateSequenceSql($sequence)
        );
        $this->assertEquals(
            'DROP SEQUENCE myseq',
            $this->_platform->getDropSequenceSql('myseq')
        );
        $this->assertEquals(
            "SELECT NEXTVAL('myseq')",
            $this->_platform->getSequenceNextValSql('myseq')
        );
    }

    public function testDoesNotPreferIdentityColumns()
    {
        $this->assertFalse($this->_platform->prefersIdentityColumns());
    }

    public function testPrefersSequences()
    {
        $this->assertTrue($this->_platform->prefersSequences());
    }

    public function testSupportsIdentityColumns()
    {
        $this->assertTrue($this->_platform->supportsIdentityColumns());
    }

    public function testSupportsSavePoints()
    {
        $this->assertTrue($this->_platform->supportsSavepoints());
    }

    public function testSupportsSequences()
    {
        $this->assertTrue($this->_platform->supportsSequences());
    }

    public function testModifyLimitQuery()
    {
        $sql = $this->_platform->modifyLimitQuery('SELECT * FROM user', 10, 0);
        $this->assertEquals('SELECT * FROM user LIMIT 10 OFFSET 0', $sql);
    }

    public function testModifyLimitQueryWithEmptyOffset()
    {
        $sql = $this->_platform->modifyLimitQuery('SELECT * FROM user', 10);
        $this->assertEquals('SELECT * FROM user LIMIT 10', $sql);
    }
}