<?php

namespace Tests\Unit\Network\Validators;

use Appwrite\Network\Validator\DNS;
use Appwrite\Tests\Retry;
use PHPUnit\Framework\TestCase;

/*
DNS Setup (on Appwrite Labs digital ocean team, network tab):

certainly.caa.appwrite.org: CAA 0 issue "certainly.com"
certainly-full.caa.appwrite.org: CAA 128 issuewild "certainly.com;account=123456;validationmethods=dns-01"
letsencrypt.certainly.caa.appwrite.org: CAA 0 issue "letsencrypt.org"

*/

class DNSTest extends TestCase
{
    public function setUp(): void
    {

    }

    public function tearDown(): void
    {
    }

    public function testCNAME(): void
    {
        $validator = new DNS('appwrite.io', DNS::RECORD_CNAME);
        $this->assertEquals($validator->isValid(''), false);
        $this->assertEquals($validator->isValid(null), false);
        $this->assertEquals($validator->isValid(false), false);
        $this->assertEquals($validator->isValid('cname-unit-test.appwrite.org'), true);
        $this->assertEquals($validator->isValid('test1.appwrite.org'), false);
    }

    public function testA(): void
    {
        // IPv4 for documentation purposes
        $validator = new DNS('203.0.113.1', DNS::RECORD_A);
        $this->assertEquals($validator->isValid(''), false);
        $this->assertEquals($validator->isValid(null), false);
        $this->assertEquals($validator->isValid(false), false);
        $this->assertEquals($validator->isValid('a-unit-test.appwrite.org'), true);
        $this->assertEquals($validator->isValid('test1.appwrite.org'), false);
    }

    public function testAAAA(): void
    {
        // IPv6 for documentation purposes
        $validator = new DNS('2001:db8::1', DNS::RECORD_AAAA);
        $this->assertEquals($validator->isValid(''), false);
        $this->assertEquals($validator->isValid(null), false);
        $this->assertEquals($validator->isValid(false), false);
        $this->assertEquals($validator->isValid('aaaa-unit-test.appwrite.org'), true);
        $this->assertEquals($validator->isValid('test1.appwrite.org'), false);
    }

    #[Retry(count: 5)]
    public function testCAA(): void
    {
        $certainly = new DNS('certainly.com', DNS::RECORD_CAA, 'ns1.digitalocean.com');
        $letsencrypt = new DNS('letsencrypt.org', DNS::RECORD_CAA, 'ns1.digitalocean.com');

        // No CAA record succeeds on main domain & subdomains for any issuer
        $this->assertEquals($certainly->isValid('caa.appwrite.org'), true);
        $this->assertEquals($certainly->isValid('sub.caa.appwrite.org'), true);
        $this->assertEquals($certainly->isValid('sub.sub.caa.appwrite.org'), true);

        $this->assertEquals($letsencrypt->isValid('caa.appwrite.org'), true);
        $this->assertEquals($letsencrypt->isValid('sub.caa.appwrite.org'), true);
        $this->assertEquals($letsencrypt->isValid('sub.sub.caa.appwrite.org'), true);

        // Custom flags and tag is allowed, but only for Certainly
        $this->assertEquals($certainly->isValid('certainly-full.caa.appwrite.org'), true);
        $this->assertEquals($letsencrypt->isValid('certainly-full.caa.appwrite.org'), false);

        // Custom flags&tag are not allowed if validator includes specific flags&tag
        $certainlyFull = new DNS('0 issue "certainly.com"', DNS::RECORD_CAA);
        $this->assertEquals($certainlyFull->isValid('certainly-full.caa.appwrite.org'), false);

        // Custom flags&tag still allows if they match exactly
        $certainlyFull = new DNS('128 issuewild "certainly.com;account=123456;validationmethods=dns-01"', DNS::RECORD_CAA);
        $this->assertEquals($certainlyFull->isValid('certainly-full.caa.appwrite.org'), true);

        // Certainly CAA allows Certainly, but not LetsEncrypt; Same for subdomains
        $this->assertEquals($certainly->isValid('certainly.caa.appwrite.org'), true);
        $this->assertEquals($letsencrypt->isValid('certainly.caa.appwrite.org'), false);

        $this->assertEquals($certainly->isValid('sub.certainly.caa.appwrite.org'), true);
        $this->assertEquals($letsencrypt->isValid('sub.certainly.caa.appwrite.org'), false);

        $this->assertEquals($certainly->isValid('sub.sub.certainly.caa.appwrite.org'), true);
        $this->assertEquals($letsencrypt->isValid('sub.sub.certainly.caa.appwrite.org'), false);

        // LetsEncrypt CAA on subdomain with parent allowing Certainly. Only LetsEncrypt is allowed; Same for subdomains
        $this->assertEquals($certainly->isValid('letsencrypt.certainly.caa.appwrite.org'), false);
        $this->assertEquals($letsencrypt->isValid('letsencrypt.certainly.caa.appwrite.org'), true);

        $this->assertEquals($certainly->isValid('sub.letsencrypt.certainly.caa.appwrite.org'), false);
        $this->assertEquals($letsencrypt->isValid('sub.letsencrypt.certainly.caa.appwrite.org'), true);

        $this->assertEquals($certainly->isValid('sub.sub.letsencrypt.certainly.caa.appwrite.org'), false);
        $this->assertEquals($letsencrypt->isValid('sub.sub.letsencrypt.certainly.caa.appwrite.org'), true);
    }
}