<?php

namespace SilverStripe\Control\Tests;

use SilverStripe\Admin\LeftAndMain;
use SilverStripe\CMS\Controllers\ErrorPageControllerExtension;
use SilverStripe\Control\Controller;
use SilverStripe\Control\Tests\RequestHandlingTest\AllowedController;
use SilverStripe\Control\Tests\RequestHandlingTest\ControllerFormWithAllowedActions;
use SilverStripe\Control\Tests\RequestHandlingTest\FieldController;
use SilverStripe\Control\Tests\RequestHandlingTest\FormActionController;
use SilverStripe\Control\Tests\RequestHandlingTest\TestController;
use SilverStripe\Dev\FunctionalTest;
use SilverStripe\Control\RequestHandler;
use SilverStripe\Control\Director;
use SilverStripe\Forms\Form;
use SilverStripe\Security\SecurityToken;

/**
 * Tests for RequestHandler and HTTPRequest.
 * We've set up a simple URL handling model based on
 */
class RequestHandlingTest extends FunctionalTest {
	protected static $fixture_file = null;

	protected $illegalExtensions = array(
		// Suppress CMS error page handling
		Controller::class => array(
			ErrorPageControllerExtension::class,
		),
		Form::class => array(
			ErrorPageControllerExtension::class,
		),
		LeftAndMain::class => array(
			ErrorPageControllerExtension::class,
		),
	);

	protected $extraControllers = [
		TestController::class,
		AllowedController::class,
		ControllerFormWithAllowedActions::class,
		FieldController::class,
		FormActionController::class
	];

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

		Director::config()->update('rules', array(
			// If we don't request any variables, then the whole URL will get shifted off.
			// This is fine, but it means that the controller will have to parse the Action from the URL itself.
			'testGoodBase1' => TestController::class,

			// The double-slash indicates how much of the URL should be shifted off the stack.
			// This is important for dealing with nested request handlers appropriately.
			'testGoodBase2//$Action/$ID/$OtherID' => TestController::class,

			// By default, the entire URL will be shifted off. This creates a bit of
			// backward-incompatability, but makes the URL rules much more explicit.
			'testBadBase/$Action/$ID/$OtherID' => TestController::class,

			// Rules with an extension always default to the index() action
			'testBaseWithExtension/virtualfile.xml' => TestController::class,

			// Without the extension, the methodname should be matched
			'testBaseWithExtension//$Action/$ID/$OtherID' => TestController::class,

			// Test nested base
			'testParentBase/testChildBase//$Action/$ID/$OtherID' => TestController::class,
		));
	}

	// public function testRequestHandlerChainingLatestParams() {
	// 	$c = new RequestHandlingTest_Controller();
	// 	$c->init();
	// 	$response = $c->handleRequest(new HTTPRequest('GET', 'testGoodBase1/TestForm/fields/MyField'));
	// 	$this->assertEquals(
	// 		$c->getRequest()->latestParams(),
	// 		array(
	// 			'Action' => 'fields',
	// 			'ID' => 'MyField'
	// 		)
	// 	);
	// }

	public function testConstructedWithNullRequest() {
		$r = new RequestHandler();
		$this->assertInstanceOf('SilverStripe\\Control\\NullHTTPRequest', $r->getRequest());
	}

	public function testRequestHandlerChainingAllParams() {
		$this->markTestIncomplete();
	}

	public function testMethodCallingOnController() {
		/* Calling a controller works just like it always has */
		$response = Director::test("testGoodBase1");
		$this->assertEquals("This is the controller", $response->getBody());

		/* ID and OtherID are extracted from the URL and passed in $request->params. */
		$response = Director::test("testGoodBase1/method/1/2");
		$this->assertEquals("This is a method on the controller: 1, 2", $response->getBody());

		/* In addition, these values are availalbe in $controller->urlParams.  This is mainly for backward
		 * compatability. */
		$response = Director::test("testGoodBase1/legacymethod/3/4");
		$this->assertEquals("\$this->urlParams can be used, for backward compatibility: 3, 4", $response->getBody());
	}

	public function testPostRequests() {
		/* The HTTP Request handler can trigger special behaviour for GET and POST. */
		$response = Director::test("testGoodBase1/TestForm", array("MyField" => 3), null, "POST");
		$this->assertEquals("Form posted", $response->getBody());

		$response = Director::test("testGoodBase1/TestForm");
		$this->assertEquals("Get request on form", $response->getBody());
	}

	public function testRequestHandlerChaining() {
		/* Request handlers can be chained, from Director to Controller to Form to FormField.  Here, we can make a get
		request on a FormField. */
		$response = Director::test("testGoodBase1/TestForm/fields/MyField");
		$this->assertEquals("MyField requested", $response->getBody());

		/* We can also make a POST request on a form field, which could be used for in-place editing, for example. */
		$response = Director::test("testGoodBase1/TestForm/fields/MyField", array("MyField" => 5));
		$this->assertEquals("MyField posted, update to 5", $response->getBody());
	}

	public function testBaseUrlPrefixed() {
		$this->withBaseFolder('/silverstripe', function($test) {
			$this->assertEquals(
				'MyField requested',
				Director::test('/silverstripe/testGoodBase1/TestForm/fields/MyField')->getBody()
			);

			$this->assertEquals(
				'MyField posted, update to 5',
				Director::test('/silverstripe/testGoodBase1/TestForm/fields/MyField', array('MyField' => 5))->getBody()
			);
		});
	}

	public function testBadBase() {
		/* We no longer support using hacky attempting to handle URL parsing with broken rules */
		$response = Director::test("testBadBase/method/1/2");
		$this->assertNotEquals("This is a method on the controller: 1, 2", $response->getBody());

		$response = Director::test("testBadBase/TestForm", array("MyField" => 3), null, "POST");
		$this->assertNotEquals("Form posted", $response->getBody());

		$response = Director::test("testBadBase/TestForm/fields/MyField");
		$this->assertNotEquals("MyField requested", $response->getBody());
	}

	public function testBaseWithExtension() {
		/* Rules with an extension always default to the index() action */
		$response = Director::test("testBaseWithExtension/virtualfile.xml");
		$this->assertEquals("This is the controller", $response->getBody());

		/* Without the extension, the methodname should be matched */
		$response = Director::test("testBaseWithExtension/virtualfile");
		$this->assertEquals("This is the virtualfile method", $response->getBody());
	}

	public function testNestedBase() {
		/* Nested base should leave out the two parts and correctly map arguments */
		$response = Director::test("testParentBase/testChildBase/method/1/2");
		$this->assertEquals("This is a method on the controller: 1, 2", $response->getBody());
	}

	public function testInheritedUrlHandlers() {
		/* $url_handlers can be defined on any class, and */
		$response = Director::test("testGoodBase1/TestForm/fields/SubclassedField/something");
		$this->assertEquals("customSomething", $response->getBody());

		/* However, if the subclass' url_handlers don't match, then the parent class' url_handlers will be used */
		$response = Director::test("testGoodBase1/TestForm/fields/SubclassedField");
		$this->assertEquals("SubclassedField requested", $response->getBody());
	}

	public function testDisallowedExtendedActions() {
		/* Actions on an extension are allowed because they specifically provided appropriate allowed_actions items */
		$response = Director::test("testGoodBase1/otherExtendedMethod");
		$this->assertEquals("otherExtendedMethod", $response->getBody());

		/* The failoverMethod action wasn't explicitly listed and so isnt' allowed */
		$response = Director::test("testGoodBase1/failoverMethod");
		$this->assertEquals(404, $response->getStatusCode());

		/* However, on RequestHandlingTest_AllowedController it has been explicitly allowed */
		$response = Director::test("AllowedController/failoverMethod");
		$this->assertEquals("failoverMethod", $response->getBody());

		/* The action on the extension is allowed when explicitly allowed on extension,
			even if its not mentioned in controller */
		$response = Director::test("AllowedController/extendedMethod");
		$this->assertEquals(200, $response->getStatusCode());

		/* This action has been blocked by an argument to a method */
		$response = Director::test('AllowedController/blockMethod');
		$this->assertEquals(403, $response->getStatusCode());

		/* Whereas this one has been allowed by a method without an argument */
		$response = Director::test('AllowedController/allowMethod');
		$this->assertEquals('allowMethod', $response->getBody());
	}

	public function testHTTPException() {
		$exception = Director::test('TestController/throwexception');
		$this->assertEquals(400, $exception->getStatusCode());
		$this->assertEquals('This request was invalid.', $exception->getBody());

		$responseException = (Director::test('TestController/throwresponseexception'));
		$this->assertEquals(500, $responseException->getStatusCode());
		$this->assertEquals('There was an internal server error.', $responseException->getBody());
	}

	public function testHTTPError() {
		RequestHandlingTest\ControllerExtension::$called_error = false;
		RequestHandlingTest\ControllerExtension::$called_404_error = false;

		$response = Director::test('TestController/throwhttperror');

		$this->assertEquals(404, $response->getStatusCode());
		$this->assertEquals('This page does not exist.', $response->getBody());

		// Confirm that RequestHandlingTest\ControllerExtension::onBeforeHTTPError() called
		$this->assertTrue(RequestHandlingTest\ControllerExtension::$called_error);
		// Confirm that RequestHandlingTest\ControllerExtension::onBeforeHTTPError404() called
		$this->assertTrue(RequestHandlingTest\ControllerExtension::$called_404_error);
	}

	public function testMethodsOnParentClassesOfRequestHandlerDeclined() {
		$response = Director::test('testGoodBase1/getIterator');
		$this->assertEquals(404, $response->getStatusCode());
	}

	public function testFormActionsCanBypassAllowedActions() {
		SecurityToken::enable();

		$response = $this->get('FormActionController');
		$this->assertEquals(200, $response->getStatusCode());
		$tokenEls = $this->cssParser()->getBySelector('#Form_Form_SecurityID');
		$securityId = (string)$tokenEls[0]['value'];

		$data = array('action_formaction' => 1);
		$response = $this->post('FormActionController/Form', $data);
		$this->assertEquals(400, $response->getStatusCode(),
			'Should fail: Invocation through POST form handler, not contained in $allowed_actions, without CSRF token'
		);

		$data = array('action_disallowedcontrollermethod' => 1, 'SecurityID' => $securityId);
		$response = $this->post('FormActionController/Form', $data);
		$this->assertEquals(403, $response->getStatusCode(),
			'Should fail: Invocation through POST form handler, controller action instead of form action,'
			.' not contained in $allowed_actions, with CSRF token'
		);

		$data = array('action_formaction' => 1, 'SecurityID' => $securityId);
		$response = $this->post('FormActionController/Form', $data);
		$this->assertEquals(200, $response->getStatusCode());
		$this->assertEquals('formaction', $response->getBody(),
			'Should pass: Invocation through POST form handler, not contained in $allowed_actions, with CSRF token'
		);

		$data = array('action_controlleraction' => 1, 'SecurityID' => $securityId);
		$response = $this->post('FormActionController/Form', $data);
		$this->assertEquals(200, $response->getStatusCode(),
			'Should pass: Invocation through POST form handler, controller action instead of form action, contained in'
				. ' $allowed_actions, with CSRF token'
		);

		$data = array('action_formactionInAllowedActions' => 1);
		$response = $this->post('FormActionController/Form', $data);
		$this->assertEquals(400, $response->getStatusCode(),
			'Should fail: Invocation through POST form handler, contained in $allowed_actions, without CSRF token'
		);

		$data = array('action_formactionInAllowedActions' => 1, 'SecurityID' => $securityId);
		$response = $this->post('FormActionController/Form', $data);
		$this->assertEquals(200, $response->getStatusCode(),
			'Should pass: Invocation through POST form handler, contained in $allowed_actions, with CSRF token'
		);

		$data = array();
		$response = $this->post('FormActionController/formaction', $data);
		$this->assertEquals(404, $response->getStatusCode(),
			'Should fail: Invocation through POST URL, not contained in $allowed_actions, without CSRF token'
		);

		$data = array();
		$response = $this->post('FormActionController/formactionInAllowedActions', $data);
		$this->assertEquals(200, $response->getStatusCode(),
			'Should pass: Invocation of form action through POST URL, contained in $allowed_actions, without CSRF token'
		);

		$data = array('SecurityID' => $securityId);
		$response = $this->post('FormActionController/formactionInAllowedActions', $data);
		$this->assertEquals(200, $response->getStatusCode(),
			'Should pass: Invocation of form action through POST URL, contained in $allowed_actions, with CSRF token'
		);

		$data = array(); // CSRF protection doesnt kick in for direct requests
		$response = $this->post('FormActionController/formactionInAllowedActions', $data);
		$this->assertEquals(200, $response->getStatusCode(),
			'Should pass: Invocation of form action through POST URL, contained in $allowed_actions, without CSRF token'
		);

		SecurityToken::disable();
	}

	public function testAllowedActionsEnforcedOnForm() {
		$data = array('action_allowedformaction' => 1);
		$response = $this->post('ControllerFormWithAllowedActions/Form', $data);
		$this->assertEquals(200, $response->getStatusCode());
		$this->assertEquals('allowedformaction', $response->getBody());

		$data = array('action_disallowedformaction' => 1);
		$response = $this->post('ControllerFormWithAllowedActions/Form', $data);
		$this->assertEquals(403, $response->getStatusCode());
		// Note: Looks for a specific 403 thrown by Form->httpSubmission(), not RequestHandler->handleRequest()
		$this->assertContains('not allowed on form', $response->getBody());
	}

	public function testActionHandlingOnField() {
		$data = array('action_actionOnField' => 1);
		$response = $this->post('FieldController/TestForm', $data);
		$this->assertEquals(200, $response->getStatusCode());
		$this->assertEquals('Test method on MyField', $response->getBody());

		$data = array('action_actionNotAllowedOnField' => 1);
		$response = $this->post('FieldController/TestForm', $data);
		$this->assertEquals(404, $response->getStatusCode());
	}

}