<?php

/*
 * This file is part of the Predis package.
 *
 * (c) Daniele Alessandri <suppakilla@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Predis\Collection\Iterator;

use PredisTestCase;

/**
 * @group realm-iterators
 */
class KeyspaceTest extends PredisTestCase
{
    /**
     * @group disconnected
     * @expectedException \Predis\NotSupportedException
     * @expectedExceptionMessage 'SCAN' is not supported by the current command factory.
     */
    public function testThrowsExceptionOnMissingCommand()
    {
        $commands = $this->getMock('Predis\Command\FactoryInterface');
        $commands
            ->expects($this->any())
            ->method('supportsCommand')
            ->will($this->returnValue(false));

        $client = $this->getMock('Predis\ClientInterface');
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($commands));

        new Keyspace($client);
    }

    /**
     * @group disconnected
     */
    public function testIterationWithNoResults()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->once())
            ->method('scan')
            ->with(0, array())
            ->will($this->returnValue(
                array(0, array())
            ));

        $iterator = new Keyspace($client);

        $iterator->rewind();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationOnSingleFetch()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->once())
            ->method('scan')
            ->with(0, array())
            ->will($this->returnValue(
                array(0, array('key:1st', 'key:2nd', 'key:3rd'))
            ));

        $iterator = new Keyspace($client);

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:3rd', $iterator->current());
        $this->assertSame(2, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationOnMultipleFetches()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->at(1))
            ->method('scan')
            ->with(0, array())
            ->will($this->returnValue(
                array(2, array('key:1st', 'key:2nd'))
            ));
        $client
            ->expects($this->at(2))
            ->method('scan')
            ->with(2, array())
            ->will($this->returnValue(
                array(0, array('key:3rd'))
            ));

        $iterator = new Keyspace($client);

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:3rd', $iterator->current());
        $this->assertSame(2, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationOnMultipleFetchesAndHoleInFirstFetch()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->at(1))
            ->method('scan')
            ->with(0, array())
            ->will($this->returnValue(
                array(4, array())
            ));
        $client
            ->expects($this->at(2))
            ->method('scan')
            ->with(4, array())
            ->will($this->returnValue(
                array(0, array('key:1st', 'key:2nd'))
            ));

        $iterator = new Keyspace($client);

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationOnMultipleFetchesAndHoleInMidFetch()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->at(1))
            ->method('scan')
            ->with(0, array())
            ->will($this->returnValue(
                array(2, array('key:1st', 'key:2nd'))
            ));
        $client
            ->expects($this->at(2))
            ->method('scan')
            ->with(2, array())
            ->will($this->returnValue(
                array(5, array())
            ));
        $client
            ->expects($this->at(3))
            ->method('scan')
            ->with(5, array())
            ->will($this->returnValue(
                array(0, array('key:3rd'))
            ));

        $iterator = new Keyspace($client);

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:3rd', $iterator->current());
        $this->assertSame(2, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationWithOptionMatch()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->at(1))
            ->method('scan')
            ->with(0, array('MATCH' => 'key:*'))
            ->will($this->returnValue(
                array(0, array('key:1st', 'key:2nd'))
            ));

        $iterator = new Keyspace($client, 'key:*');

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationWithOptionMatchOnMultipleFetches()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->at(1))
            ->method('scan')
            ->with(0, array('MATCH' => 'key:*'))
            ->will($this->returnValue(
                array(1, array('key:1st'))
            ));
        $client
            ->expects($this->at(2))
            ->method('scan')
            ->with(1, array('MATCH' => 'key:*'))
            ->will($this->returnValue(
                array(0, array('key:2nd'))
            ));

        $iterator = new Keyspace($client, 'key:*');

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationWithOptionCount()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->at(1))
            ->method('scan')
            ->with(0, array('COUNT' => 2))
            ->will($this->returnValue(
                array(0, array('key:1st', 'key:2nd'))
            ));

        $iterator = new Keyspace($client, null, 2);

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationWithOptionCountOnMultipleFetches()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->at(1))
            ->method('scan')
            ->with(0, array('COUNT' => 1))
            ->will($this->returnValue(array(1, array('key:1st'))));
        $client
            ->expects($this->at(2))
            ->method('scan')
            ->with(1, array('COUNT' => 1))
            ->will($this->returnValue(
                array(0, array('key:2nd'))
            ));

        $iterator = new Keyspace($client, null, 1);

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationWithOptionsMatchAndCount()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->at(1))
            ->method('scan')
            ->with(0, array('MATCH' => 'key:*', 'COUNT' => 2))
            ->will($this->returnValue(
                array(0, array('key:1st', 'key:2nd'))
            ));

        $iterator = new Keyspace($client, 'key:*', 2);

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationWithOptionsMatchAndCountOnMultipleFetches()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->at(1))
            ->method('scan')
            ->with(0, array('MATCH' => 'key:*', 'COUNT' => 1))
            ->will($this->returnValue(
                array(1, array('key:1st'))
            ));
        $client
            ->expects($this->at(2))
            ->method('scan')
            ->with(1, array('MATCH' => 'key:*', 'COUNT' => 1))
            ->will($this->returnValue(
                array(0, array('key:2nd'))
            ));

        $iterator = new Keyspace($client, 'key:*', 1);

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:2nd', $iterator->current());
        $this->assertSame(1, $iterator->key());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }

    /**
     * @group disconnected
     */
    public function testIterationRewindable()
    {
        $client = $this->getMock('Predis\Client', array('getCommandFactory', 'scan'));
        $client
            ->expects($this->any())
            ->method('getCommandFactory')
            ->will($this->returnValue($this->getCommandFactory()));
        $client
            ->expects($this->exactly(2))
            ->method('scan')
            ->with(0, array())
            ->will($this->returnValue(
                array(0, array('key:1st', 'key:2nd'))
            ));

        $iterator = new Keyspace($client);

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->rewind();
        $this->assertTrue($iterator->valid());
        $this->assertSame('key:1st', $iterator->current());
        $this->assertSame(0, $iterator->key());

        $iterator->next();
        $this->assertTrue($iterator->valid());
        $this->assertSame(1, $iterator->key());
        $this->assertSame('key:2nd', $iterator->current());

        $iterator->next();
        $this->assertFalse($iterator->valid());
    }
}