<?php
declare(strict_types=1);
namespace App\Tests;
use App\Config;
use App\Http\Request;
use App\Security\Hmac;
use App\Ingest\IngestController;
use App\Tests\Support\{InMemoryDeviceRepository, InMemoryNonceRepository,
    InMemoryRateLimiter, InMemoryEventRepository, InMemorySnapshotRepository};
use PHPUnit\Framework\TestCase;

final class IngestControllerTest extends TestCase
{
    private string $dir;
    protected function setUp(): void { $this->dir = sys_get_temp_dir() . '/snaps' . bin2hex(random_bytes(4)); mkdir($this->dir); }

    private function make(array $secrets = ['pi-1' => 'sekret']): array {
        $cfg = Config::fromArray(['snapshot_dir' => $this->dir, 'timestamp_window' => 300, 'rate_limit_per_min' => 60]);
        $dev = new InMemoryDeviceRepository($secrets);
        $nonce = new InMemoryNonceRepository();
        $rl = new InMemoryRateLimiter();
        $events = new InMemoryEventRepository();
        $snaps = new InMemorySnapshotRepository();
        $c = new IngestController($cfg, $dev, $nonce, $rl, $events, $snaps);
        return [$c, $events, $snaps, $nonce];
    }
    private function jpegB64(): string { $im = imagecreatetruecolor(8, 8); ob_start(); imagejpeg($im); $b = ob_get_clean(); return base64_encode($b); }

    private function signedReq(string $secret, array $payload, string $nonce = 'n1', string $ts = '1000'): Request {
        $body = json_encode($payload, JSON_UNESCAPED_UNICODE);
        $sig = Hmac::sign($secret, $nonce, $ts, $body);
        return new Request('POST', '/api/events',
            ['X-Nonce' => $nonce, 'X-Timestamp' => $ts, 'X-Signature' => $sig], $body, [], []);
    }
    private function payload(): array {
        return ['device_id' => 'pi-1', 'camera_id' => 'cam-1', 'event_type' => 'fall',
                'severity' => 'high', 'occurred_at' => 1000.0, 'snapshots' => [$this->jpegB64()]];
    }

    public function testAcceptsValidSignedEvent(): void {
        [$c, $events, $snaps] = $this->make();
        $res = $c->handle($this->signedReq('sekret', $this->payload()), now: 1000);
        $this->assertSame(201, $res->status());
        $this->assertCount(1, $events->rows);
        $id = json_decode($res->body(), true)['event_id'];
        $this->assertCount(1, $snaps->forEvent($id)); // snapshot re-encoded + stored
    }
    public function testRejectsBadSignature(): void {
        [$c] = $this->make();
        $req = $this->signedReq('WRONG', $this->payload());
        $this->assertSame(401, $c->handle($req, now: 1000)->status());
    }
    public function testRejectsReplayedNonce(): void {
        [$c] = $this->make();
        $req = $this->signedReq('sekret', $this->payload());
        $this->assertSame(201, $c->handle($req, now: 1000)->status());
        $this->assertSame(401, $c->handle($req, now: 1000)->status()); // same nonce again
    }
    public function testRejectsStaleTimestamp(): void {
        [$c] = $this->make();
        $req = $this->signedReq('sekret', $this->payload(), ts: '1000');
        $this->assertSame(401, $c->handle($req, now: 5000)->status()); // 4000s > 300 window
    }
    public function testRejectsUnknownDevice(): void {
        [$c] = $this->make([]); // no secrets
        $this->assertSame(401, $c->handle($this->signedReq('x', $this->payload()), now: 1000)->status());
    }
}