<?php

namespace WellRESTed\Test\Unit\Routing;

use WellRESTed\Dispatching\Dispatcher;
use WellRESTed\Message\Response;
use WellRESTed\Message\ServerRequest;
use WellRESTed\Routing\MethodMap;
use WellRESTed\Test\Doubles\MiddlewareMock;
use WellRESTed\Test\Doubles\NextMock;
use WellRESTed\Test\TestCase;

class MethodMapTest extends TestCase
{
    private $dispatcher;
    private $request;
    private $response;
    private $next;
    private $middleware;

    public function setUp()
    {
        $this->request = new ServerRequest();
        $this->response = new Response();
        $this->next = new NextMock();
        $this->middleware = new MiddlewareMock();
        $this->dispatcher = new Dispatcher();
    }

    private function getMethodMap() {
        return new MethodMap($this->dispatcher);
    }

    // -------------------------------------------------------------------------

    public function testDispatchesMiddlewareWithMatchingMethod()
    {
        $this->request = $this->request->withMethod("GET");

        $map = $this->getMethodMap();
        $map->register("GET", $this->middleware);
        $map($this->request, $this->response, $this->next);

        $this->assertTrue($this->middleware->called);
    }

    public function testTreatsMethodNamesCaseSensitively()
    {
        $this->request = $this->request->withMethod("get");

        $middlewareUpper = new MiddlewareMock();
        $middlewareLower = new MiddlewareMock();

        $map = $this->getMethodMap();
        $map->register("GET", $middlewareUpper);
        $map->register("get", $middlewareLower);
        $map($this->request, $this->response, $this->next);

        $this->assertTrue($middlewareLower->called);
    }

    public function testDispatchesWildcardMiddlewareWithNonMatchingMethod()
    {
        $this->request = $this->request->withMethod("GET");

        $map = $this->getMethodMap();
        $map->register("*", $this->middleware);
        $map($this->request, $this->response, $this->next);

        $this->assertTrue($this->middleware->called);
    }

    public function testDispatchesGetMiddlewareForHeadByDefault()
    {
        $this->request = $this->request->withMethod("HEAD");

        $map = $this->getMethodMap();
        $map->register("GET", $this->middleware);
        $map($this->request, $this->response, $this->next);

        $this->assertTrue($this->middleware->called);
    }

    public function testRegistersMiddlewareForMultipleMethods()
    {
        $map = $this->getMethodMap();
        $map->register("GET,POST", $this->middleware);

        $this->request = $this->request->withMethod("GET");
        $map($this->request, $this->response, $this->next);

        $this->request = $this->request->withMethod("POST");
        $map($this->request, $this->response, $this->next);

        $this->assertEquals(2, $this->middleware->callCount);
    }

    public function testSettingNullDeregistersMiddleware()
    {
        $this->request = $this->request->withMethod("POST");

        $map = $this->getMethodMap();
        $map->register("POST", $this->middleware);
        $map->register("POST", null);
        $response = $map($this->request, $this->response, $this->next);

        $this->assertEquals(405, $response->getStatusCode());
    }

    public function testSetsStatusTo200ForOptions()
    {
        $this->request = $this->request->withMethod("OPTIONS");

        $map = $this->getMethodMap();
        $map->register("GET", $this->middleware);
        $response = $map($this->request, $this->response, $this->next);

        $this->assertEquals(200, $response->getStatusCode());
    }

    public function testStopsPropagatingAfterOptions()
    {
        $this->request = $this->request->withMethod("OPTIONS");

        $map = $this->getMethodMap();
        $map->register("GET", $this->middleware);
        $map($this->request, $this->response, $this->next);

        $this->assertFalse($this->next->called);
    }

    /** @dataProvider allowedMethodProvider */
    public function testSetsAllowHeaderForOptions($methodsDeclared, $methodsAllowed)
    {
        $this->request = $this->request->withMethod("OPTIONS");

        $map = $this->getMethodMap();
        foreach ($methodsDeclared as $method) {
            $map->register($method, $this->middleware);
        }
        $response = $map($this->request, $this->response, $this->next);

        $this->assertContainsEach($methodsAllowed, $response->getHeaderLine("Allow"));
    }

    /** @dataProvider allowedMethodProvider */
    public function testSetsStatusTo405ForBadMethod()
    {
        $this->request = $this->request->withMethod("POST");

        $map = $this->getMethodMap();
        $map->register("GET", $this->middleware);
        $response = $map($this->request, $this->response, $this->next);

        $this->assertEquals(405, $response->getStatusCode());
    }

    /**
     * @coversNothing
     * @dataProvider allowedMethodProvider
     */
    public function testStopsPropagatingAfterBadMethod()
    {
        $this->request = $this->request->withMethod("POST");

        $map = $this->getMethodMap();
        $map->register("GET", $this->middleware);
        $map($this->request, $this->response, $this->next);
        $this->assertFalse($this->next->called);
    }

    /** @dataProvider allowedMethodProvider */
    public function testSetsAllowHeaderForBadMethod($methodsDeclared, $methodsAllowed)
    {
        $this->request = $this->request->withMethod("BAD");

        $map = $this->getMethodMap();
        foreach ($methodsDeclared as $method) {
            $map->register($method, $this->middleware);
        }
        $response = $map($this->request, $this->response, $this->next);

        $this->assertContainsEach($methodsAllowed, $response->getHeaderLine("Allow"));
    }

    public function allowedMethodProvider()
    {
        return [
            [["GET"], ["GET", "HEAD", "OPTIONS"]],
            [["GET", "POST"], ["GET", "POST", "HEAD", "OPTIONS"]],
            [["POST"], ["POST", "OPTIONS"]],
            [["POST"], ["POST", "OPTIONS"]],
            [["GET", "PUT,DELETE"], ["GET", "PUT", "DELETE", "HEAD", "OPTIONS"]],
        ];
    }

    private function assertContainsEach($expectedList, $actual) {
        foreach ($expectedList as $expected) {
            if (strpos($actual, $expected) === false) {
                $this->assertTrue(false, "'$actual' does not contain expected '$expected'");
            }
        }
        $this->assertTrue(true);
    }
}