<?php

/**
 * Tests for the PathRouter parsing.
 *
 * @covers PathRouter
 */
class PathRouterTest extends MediaWikiTestCase {

	/**
	 * @var PathRouter
	 */
	protected $basicRouter;

	protected function setUp() {
		parent::setUp();
		$router = new PathRouter;
		$router->add( "/wiki/$1" );
		$this->basicRouter = $router;
	}

	/**
	 * Test basic path parsing
	 */
	public function testBasic() {
		$matches = $this->basicRouter->parse( "/wiki/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo" ] );
	}

	/**
	 * Test loose path auto-$1
	 */
	public function testLoose() {
		$router = new PathRouter;
		$router->add( "/" ); # Should be the same as "/$1"
		$matches = $router->parse( "/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo" ] );

		$router = new PathRouter;
		$router->add( "/wiki" ); # Should be the same as /wiki/$1
		$matches = $router->parse( "/wiki/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo" ] );

		$router = new PathRouter;
		$router->add( "/wiki/" ); # Should be the same as /wiki/$1
		$matches = $router->parse( "/wiki/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo" ] );
	}

	/**
	 * Test to ensure that path is based on specifity, not order
	 */
	public function testOrder() {
		$router = new PathRouter;
		$router->add( "/$1" );
		$router->add( "/a/$1" );
		$router->add( "/b/$1" );
		$matches = $router->parse( "/a/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo" ] );

		$router = new PathRouter;
		$router->add( "/b/$1" );
		$router->add( "/a/$1" );
		$router->add( "/$1" );
		$matches = $router->parse( "/a/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo" ] );
	}

	/**
	 * Test the handling of key based arrays with a url parameter
	 */
	public function testKeyParameter() {
		$router = new PathRouter;
		$router->add( [ 'edit' => "/edit/$1" ], [ 'action' => '$key' ] );
		$matches = $router->parse( "/edit/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo", 'action' => 'edit' ] );
	}

	/**
	 * Test the handling of $2 inside paths
	 */
	public function testAdditionalParameter() {
		// Basic $2
		$router = new PathRouter;
		$router->add( '/$2/$1', [ 'test' => '$2' ] );
		$matches = $router->parse( "/asdf/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo", 'test' => 'asdf' ] );
	}

	/**
	 * Test additional restricted value parameter
	 */
	public function testRestrictedValue() {
		$router = new PathRouter;
		$router->add( '/$2/$1',
			[ 'test' => '$2' ],
			[ '$2' => [ 'a', 'b' ] ]
		);
		$router->add( '/$2/$1',
			[ 'test2' => '$2' ],
			[ '$2' => 'c' ]
		);
		$router->add( '/$1' );

		$matches = $router->parse( "/asdf/Foo" );
		$this->assertEquals( $matches, [ 'title' => "asdf/Foo" ] );

		$matches = $router->parse( "/a/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo", 'test' => 'a' ] );

		$matches = $router->parse( "/c/Foo" );
		$this->assertEquals( $matches, [ 'title' => "Foo", 'test2' => 'c' ] );
	}

	public function callbackForTest( &$matches, $data ) {
		$matches['x'] = $data['$1'];
		$matches['foo'] = $data['foo'];
	}

	public function testCallback() {
		$router = new PathRouter;
		$router->add( "/$1",
			[ 'a' => 'b', 'data:foo' => 'bar' ],
			[ 'callback' => [ $this, 'callbackForTest' ] ]
		);
		$matches = $router->parse( '/Foo' );
		$this->assertEquals( $matches, [
			'title' => "Foo",
			'x' => 'Foo',
			'a' => 'b',
			'foo' => 'bar'
		] );
	}

	/**
	 * Test to ensure that matches are not made if a parameter expects nonexistent input
	 */
	public function testFail() {
		$router = new PathRouter;
		$router->add( "/wiki/$1", [ 'title' => "$1$2" ] );
		$matches = $router->parse( "/wiki/A" );
		$this->assertEquals( [], $matches );
	}

	/**
	 * Test to ensure weight of paths is handled correctly
	 */
	public function testWeight() {
		$router = new PathRouter;
		$router->addStrict( "/Bar", [ 'ping' => 'pong' ] );
		$router->add( "/asdf-$1", [ 'title' => 'qwerty-$1' ] );
		$router->add( "/$1" );
		$router->add( "/qwerty-$1", [ 'title' => 'asdf-$1' ] );
		$router->addStrict( "/Baz", [ 'marco' => 'polo' ] );
		$router->add( "/a/$1" );
		$router->add( "/asdf/$1" );
		$router->add( "/$2/$1", [ 'unrestricted' => '$2' ] );
		$router->add( [ 'qwerty' => "/qwerty/$1" ], [ 'qwerty' => '$key' ] );
		$router->add( "/$2/$1", [ 'restricted-to-y' => '$2' ], [ '$2' => 'y' ] );

		foreach (
			[
				'/Foo' => [ 'title' => 'Foo' ],
				'/Bar' => [ 'ping' => 'pong' ],
				'/Baz' => [ 'marco' => 'polo' ],
				'/asdf-foo' => [ 'title' => 'qwerty-foo' ],
				'/qwerty-bar' => [ 'title' => 'asdf-bar' ],
				'/a/Foo' => [ 'title' => 'Foo' ],
				'/asdf/Foo' => [ 'title' => 'Foo' ],
				'/qwerty/Foo' => [ 'title' => 'Foo', 'qwerty' => 'qwerty' ],
				'/baz/Foo' => [ 'title' => 'Foo', 'unrestricted' => 'baz' ],
				'/y/Foo' => [ 'title' => 'Foo', 'restricted-to-y' => 'y' ],
			] as $path => $result
		) {
			$this->assertEquals( $router->parse( $path ), $result );
		}
	}

	/**
	 * Make sure the router handles titles like Special:Recentchanges correctly
	 */
	public function testSpecial() {
		$matches = $this->basicRouter->parse( "/wiki/Special:Recentchanges" );
		$this->assertEquals( $matches, [ 'title' => "Special:Recentchanges" ] );
	}

	/**
	 * Make sure the router decodes urlencoding properly
	 */
	public function testUrlencoding() {
		$matches = $this->basicRouter->parse( "/wiki/Title_With%20Space" );
		$this->assertEquals( $matches, [ 'title' => "Title_With Space" ] );
	}

	public static function provideRegexpChars() {
		return [
			[ "$" ],
			[ "$1" ],
			[ "\\" ],
			[ "\\$1" ],
		];
	}

	/**
	 * Make sure the router doesn't break on special characters like $ used in regexp replacements
	 * @dataProvider provideRegexpChars
	 */
	public function testRegexpChars( $char ) {
		$matches = $this->basicRouter->parse( "/wiki/$char" );
		$this->assertEquals( $matches, [ 'title' => "$char" ] );
	}

	/**
	 * Make sure the router handles characters like +&() properly
	 */
	public function testCharacters() {
		$matches = $this->basicRouter->parse( "/wiki/Plus+And&Dollar\\Stuff();[]{}*" );
		$this->assertEquals( $matches, [ 'title' => "Plus+And&Dollar\\Stuff();[]{}*" ] );
	}

	/**
	 * Make sure the router handles unicode characters correctly
	 * @depends testSpecial
	 * @depends testUrlencoding
	 * @depends testCharacters
	 */
	public function testUnicode() {
		$matches = $this->basicRouter->parse( "/wiki/Spécial:Modifications_récentes" );
		$this->assertEquals( $matches, [ 'title' => "Spécial:Modifications_récentes" ] );

		$matches = $this->basicRouter->parse( "/wiki/Sp%C3%A9cial:Modifications_r%C3%A9centes" );
		$this->assertEquals( $matches, [ 'title' => "Spécial:Modifications_récentes" ] );
	}

	/**
	 * Ensure the router doesn't choke on long paths.
	 */
	public function testLength() {
		// phpcs:disable Generic.Files.LineLength
		$matches = $this->basicRouter->parse(
			"/wiki/Lorem_ipsum_dolor_sit_amet,_consectetur_adipisicing_elit,_sed_do_eiusmod_tempor_incididunt_ut_labore_et_dolore_magna_aliqua._Ut_enim_ad_minim_veniam,_quis_nostrud_exercitation_ullamco_laboris_nisi_ut_aliquip_ex_ea_commodo_consequat._Duis_aute_irure_dolor_in_reprehenderit_in_voluptate_velit_esse_cillum_dolore_eu_fugiat_nulla_pariatur._Excepteur_sint_occaecat_cupidatat_non_proident,_sunt_in_culpa_qui_officia_deserunt_mollit_anim_id_est_laborum."
		);
		$this->assertEquals(
			$matches,
			[ 'title' => "Lorem_ipsum_dolor_sit_amet,_consectetur_adipisicing_elit,_sed_do_eiusmod_tempor_incididunt_ut_labore_et_dolore_magna_aliqua._Ut_enim_ad_minim_veniam,_quis_nostrud_exercitation_ullamco_laboris_nisi_ut_aliquip_ex_ea_commodo_consequat._Duis_aute_irure_dolor_in_reprehenderit_in_voluptate_velit_esse_cillum_dolore_eu_fugiat_nulla_pariatur._Excepteur_sint_occaecat_cupidatat_non_proident,_sunt_in_culpa_qui_officia_deserunt_mollit_anim_id_est_laborum." ]
		);
		// phpcs:enable
	}

	/**
	 * Ensure that the php passed site of parameter values are not urldecoded
	 */
	public function testPatternUrlencoding() {
		$router = new PathRouter;
		$router->add( "/wiki/$1", [ 'title' => '%20:$1' ] );
		$matches = $router->parse( "/wiki/Foo" );
		$this->assertEquals( $matches, [ 'title' => '%20:Foo' ] );
	}

	/**
	 * Ensure that raw parameter values do not have any variable replacements or urldecoding
	 */
	public function testRawParamValue() {
		$router = new PathRouter;
		$router->add( "/wiki/$1", [ 'title' => [ 'value' => 'bar%20$1' ] ] );
		$matches = $router->parse( "/wiki/Foo" );
		$this->assertEquals( $matches, [ 'title' => 'bar%20$1' ] );
	}
}