<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yiiunit\framework\db\mysql;
use yii\db\Expression;

use yiiunit\framework\db\AnyCaseValue;

/**
 * @group db
 * @group mysql
 */
class SchemaTest extends \yiiunit\framework\db\SchemaTest
{
    public $driverName = 'mysql';

    public function testLoadDefaultDatetimeColumn()
    {
        if (!version_compare($this->getConnection()->pdo->getAttribute(\PDO::ATTR_SERVER_VERSION), '5.6', '>=')) {
            $this->markTestSkipped('Default datetime columns are supported since MySQL 5.6.');
        }
        $sql = <<<SQL
CREATE TABLE  IF NOT EXISTS `datetime_test`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `dt` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `ts` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
SQL;

        $this->getConnection()->createCommand($sql)->execute();

        $schema = $this->getConnection()->getTableSchema('datetime_test');

        $dt = $schema->columns['dt'];

        $this->assertInstanceOf(Expression::className(),$dt->defaultValue);
    }

    public function testGetSchemaNames()
    {
        $this->markTestSkipped('Schemas are not supported in MySQL.');
    }

    public function constraintsProvider()
    {
        $result = parent::constraintsProvider();
        $result['1: check'][2] = false;

        $result['2: primary key'][2]->name = null;
        $result['2: check'][2] = false;

        // Work aroung bug in MySQL 5.1 - it creates only this table in lowercase. O_o
        $result['3: foreign key'][2][0]->foreignTableName = new AnyCaseValue('T_constraints_2');
        $result['3: check'][2] = false;

        $result['4: check'][2] = false;
        return $result;
    }

    /**
     * When displayed in the INFORMATION_SCHEMA.COLUMNS table, a default CURRENT TIMESTAMP is displayed
     * as CURRENT_TIMESTAMP up until MariaDB 10.2.2, and as current_timestamp() from MariaDB 10.2.3.
     *
     * @see https://mariadb.com/kb/en/library/now/#description
     * @see https://github.com/yiisoft/yii2/issues/15167
     */
    public function testAlternativeDisplayOfDefaultCurrentTimestampInMariaDB()
    {
        /**
         * We do not have a real database MariaDB >= 10.2.3 for tests, so we emulate the information that database
         * returns in response to the query `SHOW FULL COLUMNS FROM ...`
         */
        $schema = new \yii\db\mysql\Schema();
        $column = $this->invokeMethod($schema, 'loadColumnSchema', [[
            'field' => 'emulated_MariaDB_field',
            'type' => 'timestamp',
            'collation' => NULL,
            'null' => 'NO',
            'key' => '',
            'default' => 'current_timestamp()',
            'extra' => '',
            'privileges' => 'select,insert,update,references',
            'comment' => '',
        ]]);

        $this->assertInstanceOf(\yii\db\mysql\ColumnSchema::className(), $column);
        $this->assertInstanceOf(Expression::className(), $column->defaultValue);
        $this->assertEquals('CURRENT_TIMESTAMP', $column->defaultValue);
    }
}