<?php

use OPNsense\NordVPN\SystemRunner;
use OPNsense\NordVPN\TunnelHealth;
use PHPUnit\Framework\TestCase;

final class SystemRunnerAndHealthTest extends TestCase
{
    public function testRunDrainsStderr(): void
    {
        $runner = new SystemRunner(null, 2);
        $output = $runner->run([
            PHP_BINARY,
            '-r',
            'fwrite(STDERR, str_repeat("x", 262144)); echo "done";',
        ]);

        self::assertSame('done', $output);
    }

    public function testRunTimesOut(): void
    {
        $runner = new SystemRunner(null, 1);
        $started = hrtime(true);

        try {
            $runner->run([PHP_BINARY, '-r', 'while (true) { usleep(100000); }']);
            self::fail('Expected the system command to time out.');
        } catch (\RuntimeException $exception) {
            self::assertSame('System command timed out.', $exception->getMessage());
        }

        self::assertLessThan(3, (hrtime(true) - $started) / 1_000_000_000);
    }

    public function testTunnelHealthRequiresRecentHandshake(): void
    {
        $runner = new SystemRunner(static fn() => "public-key\t900\n");
        $recent = new TunnelHealth($runner, 180, static fn() => 1000);
        $stale = new TunnelHealth($runner, 50, static fn() => 1000);

        $this->assertTrue($recent->check('wg0')['available']);
        $this->assertFalse($stale->check('wg0')['available']);
        $this->assertFalse($recent->check('invalid')['available']);
    }

    public function testWireGuardApplyFollowsRegistrationSequence(): void
    {
        $commands = [];
        $runner = new SystemRunner(static function ($command) use (&$commands): string {
            $commands[] = $command;
            return '';
        });

        $runner->applyWireGuard();

        $this->assertSame([
            ['/usr/local/sbin/configctl', 'interface', 'invoke', 'registration'],
            ['/usr/local/sbin/configctl', 'template', 'reload', 'OPNsense/Wireguard'],
            ['/usr/local/opnsense/scripts/wireguard/wg-service-control.php', '-a', 'configure'],
        ], $commands);
    }

    public function testFirewallApplyReloadsRulesBeforeEvictingPluginStates(): void
    {
        $commands = [];
        $runner = new SystemRunner(static function ($command) use (&$commands): string {
            $commands[] = $command;
            return '';
        });

        $runner->applyFirewall();

        $this->assertSame([
            ['/usr/local/etc/rc.filter_configure'],
            ['/sbin/pfctl', '-k', 'label', '-k', SystemRunner::FIREWALL_LABEL],
        ], $commands);
    }
}