<?php

/**
 * @group ContentHandler
 * @group Database
 *        ^--- needed, because we do need the database to test link updates
 */
class TextContentTest extends MediaWikiLangTestCase {
	protected $context;

	protected function setUp() {
		parent::setUp();

		// Anon user
		$user = new User();
		$user->setName( '127.0.0.1' );

		$this->setMwGlobals( array(
			'wgUser' => $user,
			'wgTextModelsToParse' => array(
				CONTENT_MODEL_WIKITEXT,
				CONTENT_MODEL_CSS,
				CONTENT_MODEL_JAVASCRIPT,
			),
			'wgUseTidy' => false,
			'wgAlwaysUseTidy' => false,
		) );

		$this->context = new RequestContext( new FauxRequest() );
		$this->context->setTitle( Title::newFromText( 'Test' ) );
		$this->context->setUser( $user );
	}

	public function newContent( $text ) {
		return new TextContent( $text );
	}

	public static function dataGetParserOutput() {
		return array(
			array(
				'TextContentTest_testGetParserOutput',
				CONTENT_MODEL_TEXT,
				"hello ''world'' & [[stuff]]\n", "hello ''world'' &amp; [[stuff]]",
				array(
					'Links' => array()
				)
			),
			// TODO: more...?
		);
	}

	/**
	 * @dataProvider dataGetParserOutput
	 */
	public function testGetParserOutput( $title, $model, $text, $expectedHtml, $expectedFields = null ) {
		$title = Title::newFromText( $title );
		$content = ContentHandler::makeContent( $text, $title, $model );

		$po = $content->getParserOutput( $title );

		$html = $po->getText();
		$html = preg_replace( '#<!--.*?-->#sm', '', $html ); // strip comments

		$this->assertEquals( $expectedHtml, trim( $html ) );

		if ( $expectedFields ) {
			foreach ( $expectedFields as $field => $exp ) {
				$f = 'get' . ucfirst( $field );
				$v = call_user_func( array( $po, $f ) );

				if ( is_array( $exp ) ) {
					$this->assertArrayEquals( $exp, $v );
				} else {
					$this->assertEquals( $exp, $v );
				}
			}
		}

		// TODO: assert more properties
	}

	public static function dataPreSaveTransform() {
		return array(
			array(
				#0: no signature resolution
				'hello this is ~~~',
				'hello this is ~~~',
			),
			array(
				#1: rtrim
				" Foo \n ",
				' Foo',
			),
		);
	}

	/**
	 * @dataProvider dataPreSaveTransform
	 */
	public function testPreSaveTransform( $text, $expected ) {
		global $wgContLang;

		$options = ParserOptions::newFromUserAndLang( $this->context->getUser(), $wgContLang );

		$content = $this->newContent( $text );
		$content = $content->preSaveTransform( $this->context->getTitle(), $this->context->getUser(), $options );

		$this->assertEquals( $expected, $content->getNativeData() );
	}

	public static function dataPreloadTransform() {
		return array(
			array(
				'hello this is ~~~',
				'hello this is ~~~',
			),
		);
	}

	/**
	 * @dataProvider dataPreloadTransform
	 */
	public function testPreloadTransform( $text, $expected ) {
		global $wgContLang;
		$options = ParserOptions::newFromUserAndLang( $this->context->getUser(), $wgContLang );

		$content = $this->newContent( $text );
		$content = $content->preloadTransform( $this->context->getTitle(), $options );

		$this->assertEquals( $expected, $content->getNativeData() );
	}

	public static function dataGetRedirectTarget() {
		return array(
			array( '#REDIRECT [[Test]]',
				null,
			),
		);
	}

	/**
	 * @dataProvider dataGetRedirectTarget
	 */
	public function testGetRedirectTarget( $text, $expected ) {
		$content = $this->newContent( $text );
		$t = $content->getRedirectTarget();

		if ( is_null( $expected ) ) {
			$this->assertNull( $t, "text should not have generated a redirect target: $text" );
		} else {
			$this->assertEquals( $expected, $t->getPrefixedText() );
		}
	}

	/**
	 * @dataProvider dataGetRedirectTarget
	 */
	public function testIsRedirect( $text, $expected ) {
		$content = $this->newContent( $text );

		$this->assertEquals( !is_null( $expected ), $content->isRedirect() );
	}

	/**
	 * @todo: test needs database! Should be done by a test class in the Database group.
	 */
	/*
	public function getRedirectChain() {
		$text = $this->getNativeData();
		return Title::newFromRedirectArray( $text );
	}
	*/

	/**
	 * @todo: test needs database! Should be done by a test class in the Database group.
	 */
	/*
	public function getUltimateRedirectTarget() {
		$text = $this->getNativeData();
		return Title::newFromRedirectRecurse( $text );
	}
	*/

	public static function dataIsCountable() {
		return array(
			array( '',
				null,
				'any',
				true
			),
			array( 'Foo',
				null,
				'any',
				true
			),
			array( 'Foo',
				null,
				'comma',
				false
			),
			array( 'Foo, bar',
				null,
				'comma',
				false
			),
		);
	}

	/**
	 * @dataProvider dataIsCountable
	 * @group Database
	 */
	public function testIsCountable( $text, $hasLinks, $mode, $expected ) {
		global $wgArticleCountMethod;

		$old = $wgArticleCountMethod;
		$wgArticleCountMethod = $mode;

		$content = $this->newContent( $text );

		$v = $content->isCountable( $hasLinks, $this->context->getTitle() );
		$wgArticleCountMethod = $old;

		$this->assertEquals( $expected, $v, 'isCountable() returned unexpected value ' . var_export( $v, true )
			. ' instead of ' . var_export( $expected, true ) . " in mode `$mode` for text \"$text\"" );
	}

	public static function dataGetTextForSummary() {
		return array(
			array( "hello\nworld.",
				16,
				'hello world.',
			),
			array( 'hello world.',
				8,
				'hello...',
			),
			array( '[[hello world]].',
				8,
				'[[hel...',
			),
		);
	}

	/**
	 * @dataProvider dataGetTextForSummary
	 */
	public function testGetTextForSummary( $text, $maxlength, $expected ) {
		$content = $this->newContent( $text );

		$this->assertEquals( $expected, $content->getTextForSummary( $maxlength ) );
	}

	public function testGetTextForSearchIndex() {
		$content = $this->newContent( 'hello world.' );

		$this->assertEquals( 'hello world.', $content->getTextForSearchIndex() );
	}

	public function testCopy() {
		$content = $this->newContent( 'hello world.' );
		$copy = $content->copy();

		$this->assertTrue( $content->equals( $copy ), 'copy must be equal to original' );
		$this->assertEquals( 'hello world.', $copy->getNativeData() );
	}

	public function testGetSize() {
		$content = $this->newContent( 'hello world.' );

		$this->assertEquals( 12, $content->getSize() );
	}

	public function testGetNativeData() {
		$content = $this->newContent( 'hello world.' );

		$this->assertEquals( 'hello world.', $content->getNativeData() );
	}

	public function testGetWikitextForTransclusion() {
		$content = $this->newContent( 'hello world.' );

		$this->assertEquals( 'hello world.', $content->getWikitextForTransclusion() );
	}

	public function testGetModel() {
		$content = $this->newContent( "hello world." );

		$this->assertEquals( CONTENT_MODEL_TEXT, $content->getModel() );
	}

	public function testGetContentHandler() {
		$content = $this->newContent( "hello world." );

		$this->assertEquals( CONTENT_MODEL_TEXT, $content->getContentHandler()->getModelID() );
	}

	public static function dataIsEmpty() {
		return array(
			array( '', true ),
			array( '  ', false ),
			array( '0', false ),
			array( 'hallo welt.', false ),
		);
	}

	/**
	 * @dataProvider dataIsEmpty
	 */
	public function testIsEmpty( $text, $empty ) {
		$content = $this->newContent( $text );

		$this->assertEquals( $empty, $content->isEmpty() );
	}

	public static function dataEquals() {
		return array(
			array( new TextContent( "hallo" ), null, false ),
			array( new TextContent( "hallo" ), new TextContent( "hallo" ), true ),
			array( new TextContent( "hallo" ), new JavaScriptContent( "hallo" ), false ),
			array( new TextContent( "hallo" ), new WikitextContent( "hallo" ), false ),
			array( new TextContent( "hallo" ), new TextContent( "HALLO" ), false ),
		);
	}

	/**
	 * @dataProvider dataEquals
	 */
	public function testEquals( Content $a, Content $b = null, $equal = false ) {
		$this->assertEquals( $equal, $a->equals( $b ) );
	}

	public static function dataGetDeletionUpdates() {
		return array(
			array( "TextContentTest_testGetSecondaryDataUpdates_1",
				CONTENT_MODEL_TEXT, "hello ''world''\n",
				array()
			),
			array( "TextContentTest_testGetSecondaryDataUpdates_2",
				CONTENT_MODEL_TEXT, "hello [[world test 21344]]\n",
				array()
			),
			// TODO: more...?
		);
	}

	/**
	 * @dataProvider dataGetDeletionUpdates
	 */
	public function testDeletionUpdates( $title, $model, $text, $expectedStuff ) {
		$ns = $this->getDefaultWikitextNS();
		$title = Title::newFromText( $title, $ns );

		$content = ContentHandler::makeContent( $text, $title, $model );

		$page = WikiPage::factory( $title );
		$page->doEditContent( $content, '' );

		$updates = $content->getDeletionUpdates( $page );

		// make updates accessible by class name
		foreach ( $updates as $update ) {
			$class = get_class( $update );
			$updates[$class] = $update;
		}

		if ( !$expectedStuff ) {
			$this->assertTrue( true ); // make phpunit happy
			return;
		}

		foreach ( $expectedStuff as $class => $fieldValues ) {
			$this->assertArrayHasKey( $class, $updates, "missing an update of type $class" );

			$update = $updates[$class];

			foreach ( $fieldValues as $field => $value ) {
				$v = $update->$field; #if the field doesn't exist, just crash and burn
				$this->assertEquals( $value, $v, "unexpected value for field $field in instance of $class" );
			}
		}

		$page->doDeleteArticle( '' );
	}

	public static function provideConvert() {
		return array(
			array( // #0
				'Hallo Welt',
				CONTENT_MODEL_WIKITEXT,
				'lossless',
				'Hallo Welt'
			),
			array( // #1
				'Hallo Welt',
				CONTENT_MODEL_WIKITEXT,
				'lossless',
				'Hallo Welt'
			),
			array( // #1
				'Hallo Welt',
				CONTENT_MODEL_CSS,
				'lossless',
				'Hallo Welt'
			),
			array( // #1
				'Hallo Welt',
				CONTENT_MODEL_JAVASCRIPT,
				'lossless',
				'Hallo Welt'
			),
		);
	}

	/**
	 * @dataProvider provideConvert
	 */
	public function testConvert( $text, $model, $lossy, $expectedNative ) {
		$content = $this->newContent( $text );

		$converted = $content->convert( $model, $lossy );

		if ( $expectedNative === false ) {
			$this->assertFalse( $converted, "conversion to $model was expected to fail!" );
		} else {
			$this->assertInstanceOf( 'Content', $converted );
			$this->assertEquals( $expectedNative, $converted->getNativeData() );
		}
	}

}