<?php
namespace GuzzleHttp\Tests;

use GuzzleHttp\Handler\MockHandler;
use GuzzleHttp\HandlerStack;
use GuzzleHttp\Middleware;
use GuzzleHttp\Psr7\Request;
use GuzzleHttp\Psr7\Response;

/**
 * @covers GuzzleHttp\RedirectMiddleware
 */
class RedirectMiddlewareTest extends \PHPUnit_Framework_TestCase
{
    public function testIgnoresNonRedirects()
    {
        $response = new Response(200);
        $stack = new HandlerStack(new MockHandler([$response]));
        $stack->push(Middleware::redirect());
        $handler = $stack->resolve();
        $request = new Request('GET', 'http://example.com');
        $promise = $handler($request, []);
        $response = $promise->wait();
        $this->assertEquals(200, $response->getStatusCode());
    }

    public function testIgnoresWhenNoLocation()
    {
        $response = new Response(304);
        $stack = new HandlerStack(new MockHandler([$response]));
        $stack->push(Middleware::redirect());
        $handler = $stack->resolve();
        $request = new Request('GET', 'http://example.com');
        $promise = $handler($request, []);
        $response = $promise->wait();
        $this->assertEquals(304, $response->getStatusCode());
    }

    public function testRedirectsWithAbsoluteUri()
    {
        $mock = new MockHandler([
            new Response(302, ['Location' => 'http://test.com']),
            new Response(200)
        ]);
        $stack = new HandlerStack($mock);
        $stack->push(Middleware::redirect());
        $handler = $stack->resolve();
        $request = new Request('GET', 'http://example.com?a=b');
        $promise = $handler($request, [
            'allow_redirects' => ['max' => 2]
        ]);
        $response = $promise->wait();
        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals('http://test.com', $mock->getLastRequest()->getUri());
    }

    public function testRedirectsWithRelativeUri()
    {
        $mock = new MockHandler([
            new Response(302, ['Location' => '/foo']),
            new Response(200)
        ]);
        $stack = new HandlerStack($mock);
        $stack->push(Middleware::redirect());
        $handler = $stack->resolve();
        $request = new Request('GET', 'http://example.com?a=b');
        $promise = $handler($request, [
            'allow_redirects' => ['max' => 2]
        ]);
        $response = $promise->wait();
        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals('http://example.com/foo', $mock->getLastRequest()->getUri());
    }

    /**
     * @expectedException \GuzzleHttp\Exception\TooManyRedirectsException
     * @expectedExceptionMessage Will not follow more than 3 redirects
     */
    public function testLimitsToMaxRedirects()
    {
        $mock = new MockHandler([
            new Response(301, ['Location' => 'http://test.com']),
            new Response(302, ['Location' => 'http://test.com']),
            new Response(303, ['Location' => 'http://test.com']),
            new Response(304, ['Location' => 'http://test.com'])
        ]);
        $stack = new HandlerStack($mock);
        $stack->push(Middleware::redirect());
        $handler = $stack->resolve();
        $request = new Request('GET', 'http://example.com');
        $promise = $handler($request, ['allow_redirects' => ['max' => 3]]);
        $promise->wait();
    }

    /**
     * @expectedException \GuzzleHttp\Exception\BadResponseException
     * @expectedExceptionMessage Redirect URI,
     */
    public function testEnsuresProtocolIsValid()
    {
        $mock = new MockHandler([
            new Response(301, ['Location' => 'ftp://test.com'])
        ]);
        $stack = new HandlerStack($mock);
        $stack->push(Middleware::redirect());
        $handler = $stack->resolve();
        $request = new Request('GET', 'http://example.com');
        $handler($request, ['allow_redirects' => ['max' => 3]])->wait();
    }

    public function testAddsRefererHeader()
    {
        $mock = new MockHandler([
            new Response(302, ['Location' => 'http://test.com']),
            new Response(200)
        ]);
        $stack = new HandlerStack($mock);
        $stack->push(Middleware::redirect());
        $handler = $stack->resolve();
        $request = new Request('GET', 'http://example.com?a=b');
        $promise = $handler($request, [
            'allow_redirects' => ['max' => 2, 'referer' => true]
        ]);
        $promise->wait();
        $this->assertEquals(
            'http://example.com?a=b',
            $mock->getLastRequest()->getHeaderLine('Referer')
        );
    }

    public function testDoesNotAddRefererWhenGoingFromHttpsToHttp()
    {
        $mock = new MockHandler([
            new Response(302, ['Location' => 'http://test.com']),
            new Response(200)
        ]);
        $stack = new HandlerStack($mock);
        $stack->push(Middleware::redirect());
        $handler = $stack->resolve();
        $request = new Request('GET', 'https://example.com?a=b');
        $promise = $handler($request, [
            'allow_redirects' => ['max' => 2, 'referer' => true]
        ]);
        $promise->wait();
        $this->assertFalse($mock->getLastRequest()->hasHeader('Referer'));
    }
}