<?php

namespace SilverStripe\ORM\Tests;

use SilverStripe\ORM\ArrayList;
use SilverStripe\ORM\DataObject;
use SilverStripe\ORM\PaginatedList;
use SilverStripe\Dev\SapphireTest;
use SilverStripe\ORM\Queries\SQLSelect;
use SilverStripe\ORM\Tests\DataObjectTest\Player;
use SilverStripe\View\ArrayData;

/**
 * Tests for the {@link SilverStripe\ORM\PaginatedList} class.
 */
class PaginatedListTest extends SapphireTest
{

    protected static $fixture_file = 'DataObjectTest.yml';

    protected static function getExtraDataObjects()
    {
        return array_merge(
            DataObjectTest::$extra_data_objects,
            ManyManyListTest::$extra_data_objects
        );
    }

    public function testPageStart()
    {
        $list = new PaginatedList(new ArrayList());
        $this->assertEquals(0, $list->getPageStart(), 'The start defaults to 0.');

        $list->setPageStart(10);
        $this->assertEquals(10, $list->getPageStart(), 'You can set the page start.');

        $list = new PaginatedList(new ArrayList(), array('start' => 50));
        $this->assertEquals(50, $list->getPageStart(), 'The page start can be read from the request.');
    }

    public function testGetTotalItems()
    {
        $list = new PaginatedList(new ArrayList());
        $this->assertEquals(0, $list->getTotalItems());

        $list->setTotalItems(10);
        $this->assertEquals(10, $list->getTotalItems());

        $list = new PaginatedList(
            new ArrayList(
                array(
                new ArrayData(array()),
                new ArrayData(array())
                )
            )
        );
        $this->assertEquals(2, $list->getTotalItems());
    }

    public function testSetPaginationFromQuery()
    {
        $query = $this->getMockBuilder(SQLSelect::class)->getMock();
        $query->expects($this->once())
            ->method('getLimit')
            ->will($this->returnValue(array('limit' => 15, 'start' => 30)));
        $query->expects($this->once())
            ->method('unlimitedRowCount')
            ->will($this->returnValue(100));

        $list = new PaginatedList(new ArrayList());
        $list->setPaginationFromQuery($query);

        $this->assertEquals(15, $list->getPageLength());
        $this->assertEquals(30, $list->getPageStart());
        $this->assertEquals(100, $list->getTotalItems());
    }

    public function testSetCurrentPage()
    {
        $list = new PaginatedList(new ArrayList());
        $list->setPageLength(10);
        $list->setCurrentPage(10);

        $this->assertEquals(10, $list->CurrentPage());
        $this->assertEquals(90, $list->getPageStart());

        // Test disabled paging
        $list->setPageLength(0);
        $this->assertEquals(1, $list->CurrentPage());
    }

    public function testGetIterator()
    {
        $list = new PaginatedList(
            new ArrayList(
                array(
                new DataObject(array('Num' => 1)),
                new DataObject(array('Num' => 2)),
                new DataObject(array('Num' => 3)),
                new DataObject(array('Num' => 4)),
                new DataObject(array('Num' => 5)),
                )
            )
        );
        $list->setPageLength(2);

        $this->assertDOSEquals(
            array(array('Num' => 1), array('Num' => 2)),
            $list->getIterator()
        );

        $list->setCurrentPage(2);
        $this->assertDOSEquals(
            array(array('Num' => 3), array('Num' => 4)),
            $list->getIterator()
        );

        $list->setCurrentPage(3);
        $this->assertDOSEquals(
            array(array('Num' => 5)),
            $list->getIterator()
        );

        $list->setCurrentPage(999);
        $this->assertDOSEquals(array(), $list->getIterator());

        // Test disabled paging
        $list->setPageLength(0);
        $list->setCurrentPage(1);
        $this->assertDOSEquals(
            array(
                array('Num' => 1),
                array('Num' => 2),
                array('Num' => 3),
                array('Num' => 4),
                array('Num' => 5)
            ),
            $list->getIterator()
        );

        // Test with dataobjectset
        $players = Player::get();
        $list = new PaginatedList($players);
        $list->setPageLength(1);
        $list->getIterator();
        $this->assertEquals(
            4,
            $list->getTotalItems(),
            'Getting an iterator should not trim the list to the page length.'
        );
    }

    public function testPages()
    {
        $list = new PaginatedList(new ArrayList());
        $list->setPageLength(10);
        $list->setTotalItems(50);

        $this->assertEquals(5, count($list->Pages()));
        $this->assertEquals(3, count($list->Pages(3)));
        $this->assertEquals(5, count($list->Pages(15)));

        $list->setCurrentPage(3);

        $expectAll = array(
            array('PageNum' => 1),
            array('PageNum' => 2),
            array('PageNum' => 3, 'CurrentBool' => true),
            array('PageNum' => 4),
            array('PageNum' => 5),
        );
        $this->assertDOSEquals($expectAll, $list->Pages());

        $expectLimited = array(
            array('PageNum' => 2),
            array('PageNum' => 3, 'CurrentBool' => true),
            array('PageNum' => 4),
        );
        $this->assertDOSEquals($expectLimited, $list->Pages(3));

        // Disable paging
        $list->setPageLength(0);
        $expectAll = array(
            array('PageNum' => 1, 'CurrentBool' => true),
        );
        $this->assertDOSEquals($expectAll, $list->Pages());
    }

    public function testPaginationSummary()
    {
        $list = new PaginatedList(new ArrayList());

        $list->setPageLength(10);
        $list->setTotalItems(250);
        $list->setCurrentPage(6);

        $expect = array(
            array('PageNum' => 1),
            array('PageNum' => null),
            array('PageNum' => 4),
            array('PageNum' => 5),
            array('PageNum' => 6, 'CurrentBool' => true),
            array('PageNum' => 7),
            array('PageNum' => 8),
            array('PageNum' => null),
            array('PageNum' => 25),
        );
        $this->assertDOSEquals($expect, $list->PaginationSummary(4));

        // Disable paging
        $list->setPageLength(0);
        $expect = array(
            array('PageNum' => 1, 'CurrentBool' => true)
        );
        $this->assertDOSEquals($expect, $list->PaginationSummary(4));
    }

    public function testLimitItems()
    {
        $list = new ArrayList(range(1, 50));
        $list = new PaginatedList($list);

        $list->setCurrentPage(3);
        $this->assertEquals(10, count($list->getIterator()->getInnerIterator()));

        $list->setLimitItems(false);
        $this->assertEquals(50, count($list->getIterator()->getInnerIterator()));
    }

    public function testCurrentPage()
    {
        $list = new PaginatedList(new ArrayList());
        $list->setTotalItems(50);

        $this->assertEquals(1, $list->CurrentPage());
        $list->setPageStart(10);
        $this->assertEquals(2, $list->CurrentPage());
        $list->setPageStart(40);
        $this->assertEquals(5, $list->CurrentPage());

        // Disable paging
        $list->setPageLength(0);
        $this->assertEquals(1, $list->CurrentPage());
    }

    public function testTotalPages()
    {
        $list = new PaginatedList(new ArrayList());

        $list->setPageLength(1);
        $this->assertEquals(0, $list->TotalPages());

        $list->setTotalItems(1);
        $this->assertEquals(1, $list->TotalPages());

        $list->setTotalItems(5);
        $this->assertEquals(5, $list->TotalPages());

        // Disable paging
        $list->setPageLength(0);
        $this->assertEquals(1, $list->TotalPages());

        $list->setTotalItems(0);
        $this->assertEquals(0, $list->TotalPages());
    }

    public function testMoreThanOnePage()
    {
        $list = new PaginatedList(new ArrayList());

        $list->setPageLength(1);
        $list->setTotalItems(1);
        $this->assertFalse($list->MoreThanOnePage());

        $list->setTotalItems(2);
        $this->assertTrue($list->MoreThanOnePage());

        // Disable paging
        $list->setPageLength(0);
        $this->assertFalse($list->MoreThanOnePage());
    }

    public function testNotFirstPage()
    {
        $list = new PaginatedList(new ArrayList());
        $this->assertFalse($list->NotFirstPage());
        $list->setCurrentPage(2);
        $this->assertTrue($list->NotFirstPage());
    }

    public function testNotLastPage()
    {
        $list = new PaginatedList(new ArrayList());
        $list->setTotalItems(50);

        $this->assertTrue($list->NotLastPage());
        $list->setCurrentPage(5);
        $this->assertFalse($list->NotLastPage());
    }

    public function testFirstItem()
    {
        $list = new PaginatedList(new ArrayList());
        $this->assertEquals(1, $list->FirstItem());
        $list->setPageStart(10);
        $this->assertEquals(11, $list->FirstItem());
    }

    public function testLastItem()
    {
        $list = new PaginatedList(new ArrayList());
        $list->setPageLength(10);
        $list->setTotalItems(25);

        $list->setCurrentPage(1);
        $this->assertEquals(10, $list->LastItem());
        $list->setCurrentPage(2);
        $this->assertEquals(20, $list->LastItem());
        $list->setCurrentPage(3);
        $this->assertEquals(25, $list->LastItem());

        // Disable paging
        $list->setPageLength(0);
        $this->assertEquals(25, $list->LastItem());
    }

    public function testFirstLink()
    {
        $list = new PaginatedList(new ArrayList());
        $this->assertContains('start=0', $list->FirstLink());
    }

    public function testLastLink()
    {
        $list = new PaginatedList(new ArrayList());
        $list->setPageLength(10);
        $list->setTotalItems(100);
        $this->assertContains('start=90', $list->LastLink());

        // Disable paging
        $list->setPageLength(0);
        $this->assertContains('start=0', $list->LastLink());
    }

    public function testNextLink()
    {
        $list = new PaginatedList(new ArrayList());
        $list->setTotalItems(50);

        $this->assertContains('start=10', $list->NextLink());
        $list->setCurrentPage(2);
        $this->assertContains('start=20', $list->NextLink());
        $list->setCurrentPage(3);
        $this->assertContains('start=30', $list->NextLink());
        $list->setCurrentPage(4);
        $this->assertContains('start=40', $list->NextLink());
        $list->setCurrentPage(5);
        $this->assertNull($list->NextLink());

        // Disable paging
        $list->setCurrentPage(1);
        $list->setPageLength(0);
        $this->assertNull($list->NextLink());
    }

    public function testPrevLink()
    {
        $list = new PaginatedList(new ArrayList());
        $list->setTotalItems(50);

        $this->assertNull($list->PrevLink());
        $list->setCurrentPage(2);
        $this->assertContains('start=0', $list->PrevLink());
        $list->setCurrentPage(3);
        $this->assertContains('start=10', $list->PrevLink());
        $list->setCurrentPage(5);
        $this->assertContains('start=30', $list->PrevLink());

        // Disable paging
        $list->setPageLength(0);
        $this->assertNull($list->PrevLink());
    }
}