<?php

declare(strict_types=1);

namespace Blax\WebRtc\Tests;

use Blax\WebRtc\Media\Rust\BinaryManager;
use Blax\WebRtc\Media\Rust\SidecarException;
use Blax\WebRtc\Media\Rust\SidecarSupervisor;
use Blax\WebRtc\Media\RustMediaEngine;
use PHPUnit\Framework\TestCase;

final class SidecarSupervisorTest extends TestCase
{
    public function test_auto_spawn_disabled_fails_with_actionable_guidance(): void
    {
        $supervisor = new SidecarSupervisor(new BinaryManager([]), [
            'socket' => sys_get_temp_dir().'/blax-sfu-never-'.getmypid().'.sock',
            'auto_spawn' => false,
        ]);

        $this->assertFalse($supervisor->running());

        $this->expectException(SidecarException::class);
        $this->expectExceptionMessage('webrtc:sidecar');

        $supervisor->ensureRunning();
    }

    public function test_args_mirror_the_config(): void
    {
        $supervisor = new SidecarSupervisor(new BinaryManager([]), [
            'socket' => '/run/sfu.sock',
            'udp_ip' => '10.0.0.5',
            'udp_port' => 41000,
            'public_ip' => '203.0.113.9',
        ]);

        $this->assertSame(
            ['--socket', '/run/sfu.sock', '--udp-ip', '10.0.0.5', '--udp-port', '41000', '--public-ip', '203.0.113.9'],
            $supervisor->args(),
        );
    }

    /**
     * REAL cross-language round-trip: plug-and-play spawn of the actual Rust
     * sidecar (local cargo build), the full control protocol through
     * RustMediaEngine, and a graceful stop. Skipped until rust/ is built.
     */
    public function test_spawns_and_drives_the_real_sidecar(): void
    {
        $binary = \dirname(__DIR__).'/rust/target/debug/blax-webrtc-sfu';
        if (! is_file($binary)) {
            $this->markTestSkipped('rust sidecar not built — run `cargo build` in rust/');
        }

        $socket = sys_get_temp_dir().'/blax-sfu-e2e-'.getmypid().'.sock';
        $config = [
            'socket' => $socket,
            'binary' => $binary,
            'auto_install' => false,
            'udp_ip' => '127.0.0.1',
            'log' => sys_get_temp_dir().'/blax-sfu-e2e-'.getmypid().'.log',
            'spawn_timeout' => 15.0,
        ];
        $supervisor = new SidecarSupervisor(new BinaryManager($config), $config);

        try {
            $this->assertFalse($supervisor->running());

            $supervisor->ensureRunning(); // finds the binary + spawns detached
            $this->assertTrue($supervisor->running());

            $engine = new RustMediaEngine($supervisor);

            // Empty stats on a fresh sidecar.
            $this->assertSame([], $engine->stats());

            // A garbage offer must come back as a clean protocol error.
            try {
                $engine->addPeer('lobby', 'alice', 'this is not sdp');
                $this->fail('expected the sidecar to reject a garbage offer');
            } catch (SidecarException $e) {
                $this->assertStringContainsString('offer', $e->getMessage());
            }

            // Unknown peers error cleanly too.
            try {
                $engine->mutePeer('lobby', 'ghost', true);
                $this->fail('expected a no-such-peer error');
            } catch (SidecarException $e) {
                $this->assertStringContainsString('no such peer', $e->getMessage());
            }

            // ensureRunning is idempotent while it lives.
            $supervisor->ensureRunning();
            $this->assertTrue($supervisor->running());
        } finally {
            $supervisor->stop();
            @unlink($socket);
            @unlink($socket.'.lock');
            @unlink($config['log']);
        }

        $this->assertFalse($supervisor->running(), 'graceful shutdown via the control socket');
    }
}