<?php
namespace Xxx\Tests\Unit;

use Xxx\Tests\Support\FakeDb;
use Xxx\Tests\Support\SiteData;
use Xxx\Tests\Support\TestCase;

// get_count() and get_query() in get_data.lib.php
class QueryTest extends TestCase {
  // Every story column but the image data
  private const COLUMNS = 'id, title, author, email, date, story, hidden, mime, comments, editor, IF(LENGTH(img) > 0, 1, NULL) AS img';

  protected function setUp(): void {
    parent::setUp();
    SiteData::install(array(
      'xxx' => array(
        array('id' => 1, 'title' => 'Apple', 'author' => 'Zed', 'date' => '2020-01-01 10:00:00'),
        array('id' => 2, 'title' => 'Banana', 'author' => 'Yan', 'date' => '2020-02-01 10:00:00', 'story' => '<p>A cherry story.</p>'),
        array('id' => 3, 'title' => 'Cherry', 'author' => 'Xi', 'date' => '2020-03-01 10:00:00', 'hidden' => '1'),
      ),
      'queue' => array(
        array('id' => 10, 'title' => 'Queued', 'date' => '2020-04-01 10:00:00'),
      ),
    ));
    open_db('open');
  }

  private function lastQuery(): array {
    return end(FakeDb::$log);
  }

  public function testVisitorsDoNotCountHiddenStories(): void {
    $this->assertSame('2', get_count());
    $this->assertSame('SELECT COUNT(*) FROM xxx WHERE 1 AND hidden IS NOT TRUE', $this->lastQuery()['sql']);
  }

  public function testEditorsCountHiddenStories(): void {
    $this->asEditor();
    $this->assertSame('3', get_count());
    $this->assertSame('SELECT COUNT(*) FROM xxx WHERE 1', $this->lastQuery()['sql']);
  }

  public function testEditorsCountTheQueue(): void {
    $this->asEditor();
    $this->request(array('queue' => '1'));
    $this->assertSame('1', get_count());
  }

  public function testVisitorsCannotCountTheQueue(): void {
    $this->request(array('queue' => '1'));
    $this->assertSame('2', get_count());
    $this->assertStringContainsString('FROM xxx', $this->lastQuery()['sql']);
  }

  public function testSearchCountBindsTheTermFourTimes(): void {
    $this->request(array('search' => "cherry' OR '1'='1"));
    get_count();
    $query = $this->lastQuery();
    $this->assertSame("SELECT COUNT(*) FROM xxx WHERE (title LIKE ? OR author LIKE ? OR date LIKE ? OR story LIKE ?) AND hidden IS NOT TRUE", $query['sql']);
    $this->assertSame(array_fill(0, 4, "%cherry' OR '1'='1%"), $query['params']);
  }

  public function testSearchCountFindsMatches(): void {
    $this->request(array('search' => 'cherry'));
    $this->assertSame('1', get_count());   // Banana's story; Cherry is hidden
  }

  public function testDefaultListIsNewestFirstWithoutHiddenStories(): void {
    $GLOBALS['num_stories'] = 5;
    $rows = get_query();
    $this->assertSame(array('2', '1'), array_column($rows, 'id'));
    $this->assertSame('SELECT ' . self::COLUMNS . ' FROM xxx WHERE 1 AND hidden IS NOT TRUE ORDER BY date desc LIMIT 0 , 5', $this->lastQuery()['sql']);
    $this->assertSame(array(0, 0), array_column($rows, 'queue_url'));
  }

  public function testEditorsSeeHiddenStories(): void {
    $this->asEditor();
    $GLOBALS['num_stories'] = 5;
    $this->assertSame(array('3', '2', '1'), array_column(get_query(), 'id'));
  }

  public function testSortOrderStartAndShow(): void {
    $this->request(array('sort' => 'title', 'order' => 'asc', 'start' => '1', 'show' => '1'));
    $rows = get_query();
    $this->assertSame('SELECT ' . self::COLUMNS . ' FROM xxx WHERE 1 AND hidden IS NOT TRUE ORDER BY title asc LIMIT 1 , 1', $this->lastQuery()['sql']);
    $this->assertSame(array('Banana'), array_column($rows, 'title'));
  }

  public function testBadSortAndOrderValuesFallBack(): void {
    $this->request(array('sort' => 'id; DROP TABLE xxx', 'order' => 'desc; --', 'start' => 'x', 'show' => 'y'));
    get_query();
    $this->assertSame('SELECT ' . self::COLUMNS . ' FROM xxx WHERE 1 AND hidden IS NOT TRUE ORDER BY date desc LIMIT 0 , 1', $this->lastQuery()['sql']);
  }

  public function testOneStoryById(): void {
    $rows = get_query('2');
    $this->assertSame('SELECT ' . self::COLUMNS . ' FROM xxx WHERE 1 AND hidden IS NOT TRUE AND id = 2 LIMIT 0, 1', $this->lastQuery()['sql']);
    $this->assertSame(array('Banana'), array_column($rows, 'title'));
  }

  public function testVisitorsCannotOpenAHiddenStory(): void {
    $this->assertSame(array(), get_query('3'));
  }

  public function testEditorsCanOpenAHiddenStory(): void {
    $this->asEditor();
    $this->assertSame(array('Cherry'), array_column(get_query('3'), 'title'));
    $this->assertSame('SELECT ' . self::COLUMNS . ' FROM xxx WHERE 1 AND id = 3 LIMIT 0, 1', $this->lastQuery()['sql']);
  }

  public function testIdIsCastToAnInteger(): void {
    get_query('2.9');
    $this->assertStringContainsString('AND id = 2 LIMIT', $this->lastQuery()['sql']);
  }

  public function testNonNumericIdListsStories(): void {
    get_query('2 OR 1=1');
    $this->assertStringNotContainsString('OR 1=1', $this->lastQuery()['sql']);
    $this->assertStringContainsString('ORDER BY', $this->lastQuery()['sql']);
  }

  public function testSearchListBindsTheTerm(): void {
    $this->request(array('search' => '%_'));
    get_query();
    $query = $this->lastQuery();
    $this->assertStringStartsWith('SELECT ' . self::COLUMNS . ' FROM xxx WHERE (title LIKE ? OR author LIKE ? OR date LIKE ? OR story LIKE ?) AND hidden IS NOT TRUE ORDER BY', $query['sql']);
    $this->assertSame(array_fill(0, 4, '%%_%'), $query['params']);
  }

  // A page of 50 stories would otherwise read 50 images, only to see which stories have one
  public function testImageDataStaysInTheDatabase(): void {
    SiteData::install(array('xxx' => array(
      array('id' => 1, 'story' => '', 'img' => str_repeat('P', 1000), 'mime' => 'image/png'),
      array('id' => 2),
    )));
    $GLOBALS['num_stories'] = 5;
    $rows = array_column(get_query(), NULL, 'id');
    $this->assertSame(1, $rows['1']['img']);
    $this->assertNull($rows['2']['img']);
    $this->assertSame(1, get_query('1')[0]['img']);
  }

  public function testQueueRowsAreMarked(): void {
    $this->asEditor();
    $this->request(array('queue' => '1'));
    $GLOBALS['num_stories'] = 5;
    $rows = get_query();
    $this->assertSame(array('10'), array_column($rows, 'id'));
    $this->assertSame(array(1), array_column($rows, 'queue_url'));
  }
}