<?php

namespace Illuminate\Tests\Http\Middleware;

use Illuminate\Http\Middleware\SetCacheHeaders as Cache;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Carbon;
use InvalidArgumentException;
use PHPUnit\Framework\TestCase;

class CacheTest extends TestCase
{
    public function testDoNotSetHeaderWhenMethodNotCacheable()
    {
        $request = new Request;
        $request->setMethod('PUT');

        $response = (new Cache)->handle($request, function () {
            return new Response('Hello Laravel');
        }, 'max_age=120;s_maxage=60');

        $this->assertNull($response->getMaxAge());
    }

    public function testDoNotSetHeaderWhenNoContent()
    {
        $response = (new Cache)->handle(new Request, function () {
            return new Response;
        }, 'max_age=120;s_maxage=60');

        $this->assertNull($response->getMaxAge());
        $this->assertNull($response->getEtag());
    }

    public function testAddHeaders()
    {
        $response = (new Cache)->handle(new Request, function () {
            return new Response('some content');
        }, 'max_age=100;s_maxage=200;etag=ABC');

        $this->assertSame('"ABC"', $response->getEtag());
        $this->assertSame('max-age=100, public, s-maxage=200', $response->headers->get('Cache-Control'));
    }

    public function testAddHeadersUsingArray()
    {
        $response = (new Cache)->handle(new Request, function () {
            return new Response('some content');
        }, ['max_age' => 100, 's_maxage' => 200, 'etag' => 'ABC']);

        $this->assertSame('"ABC"', $response->getEtag());
        $this->assertSame('max-age=100, public, s-maxage=200', $response->headers->get('Cache-Control'));
    }

    public function testGenerateEtag()
    {
        $response = (new Cache)->handle(new Request, function () {
            return new Response('some content');
        }, 'etag;max_age=100;s_maxage=200');

        $this->assertSame('"9893532233caff98cd083a116b013c0b"', $response->getEtag());
        $this->assertSame('max-age=100, public, s-maxage=200', $response->headers->get('Cache-Control'));
    }

    public function testIsNotModified()
    {
        $request = new Request;
        $request->headers->set('If-None-Match', '"9893532233caff98cd083a116b013c0b"');

        $response = (new Cache)->handle($request, function () {
            return new Response('some content');
        }, 'etag;max_age=100;s_maxage=200');

        $this->assertSame(304, $response->getStatusCode());
    }

    public function testInvalidOption()
    {
        $this->expectException(InvalidArgumentException::class);

        (new Cache)->handle(new Request, function () {
            return new Response('some content');
        }, 'invalid');
    }

    public function testLastModifiedUnixTime()
    {
        $time = time();

        $response = (new Cache)->handle(new Request, function () {
            return new Response('some content');
        }, "last_modified=$time");

        $this->assertSame($time, $response->getLastModified()->getTimestamp());
    }

    public function testLastModifiedStringDate()
    {
        $birthdate = '1973-04-09 10:10:10';
        $response = (new Cache)->handle(new Request, function () {
            return new Response('some content');
        }, "last_modified=$birthdate");

        $this->assertSame(Carbon::parse($birthdate)->timestamp, $response->getLastModified()->getTimestamp());
    }

    public function testTrailingDelimiterIgnored()
    {
        $time = time();

        $response = (new Cache)->handle(new Request, function () {
            return new Response('some content');
        }, "last_modified=$time;");

        $this->assertSame($time, $response->getLastModified()->getTimestamp());
    }
}