<?php
declare(strict_types=1);
namespace App\Tests;
use App\Config;
use App\Http\Request;
use App\Security\Hmac;
use App\Api\{ConfigController, HeartbeatController};
use App\Tests\Support\{InMemoryDeviceRepository, InMemoryZoneRepository, InMemoryThresholdRepository, InMemoryNonceRepository};
use PHPUnit\Framework\TestCase;

final class ApiSyncTest extends TestCase
{
    private function signed(string $method, string $path, string $secret, array $q = [], array $body = [], string $nonce = 'n1', string $ts = '1000'): Request {
        $raw = $body ? json_encode($body) : '';
        $sig = Hmac::sign($secret, $nonce, $ts, $raw);
        return new Request($method, $path, ['X-Nonce' => $nonce, 'X-Timestamp' => $ts, 'X-Signature' => $sig], $raw, $q, []);
    }
    public function testConfigReturnsZonesAndThresholds(): void {
        $dev = new InMemoryDeviceRepository(['pi-1' => 'sek'], ['pi-1' => 7]);
        $zones = new InMemoryZoneRepository(); $zones->save(['device_id' => 'pi-1', 'camera_id' => 'cam-1', 'level' => 'restricted', 'polygon_json' => '[[0,0],[9,0],[9,9]]']);
        $thr = new InMemoryThresholdRepository(['pi-1' => ['fall_prone_s' => 3.0]]);
        $nonces = new InMemoryNonceRepository();
        $cfg = Config::fromArray(['timestamp_window' => 300]);
        $c = new ConfigController($dev, $zones, $thr, $nonces, $cfg);
        $res = $c->get($this->signed('GET', '/api/config', 'sek', ['device_id' => 'pi-1']), now: 1000);
        $this->assertSame(200, $res->status());
        $data = json_decode($res->body(), true);
        $this->assertSame(7, $data['version']);
        $this->assertCount(1, $data['zones']);
        $this->assertEquals(3.0, $data['thresholds']['fall_prone_s']);
    }
    public function testConfigRejectsBadSignature(): void {
        $dev = new InMemoryDeviceRepository(['pi-1' => 'sek']);
        $c = new ConfigController($dev, new InMemoryZoneRepository(), new InMemoryThresholdRepository(), new InMemoryNonceRepository(), Config::fromArray([]));
        $res = $c->get($this->signed('GET', '/api/config', 'WRONG', ['device_id' => 'pi-1']), now: 1000);
        $this->assertSame(401, $res->status());
    }
    public function testConfigRejectsReplayedNonce(): void {
        $dev = new InMemoryDeviceRepository(['pi-1' => 'sek'], ['pi-1' => 7]);
        $zones = new InMemoryZoneRepository();
        $thr = new InMemoryThresholdRepository();
        $nonces = new InMemoryNonceRepository();
        $cfg = Config::fromArray(['timestamp_window' => 300]);
        $c = new ConfigController($dev, $zones, $thr, $nonces, $cfg);
        $req = $this->signed('GET', '/api/config', 'sek', ['device_id' => 'pi-1'], [], 'replay-nonce', '1000');
        $this->assertSame(200, $c->get($req, now: 1000)->status());
        $this->assertSame(401, $c->get($req, now: 1000)->status()); // same nonce replayed
    }
    public function testConfigRejectsStaleTimestamp(): void {
        $dev = new InMemoryDeviceRepository(['pi-1' => 'sek']);
        $zones = new InMemoryZoneRepository();
        $thr = new InMemoryThresholdRepository();
        $nonces = new InMemoryNonceRepository();
        $cfg = Config::fromArray(['timestamp_window' => 300]);
        $c = new ConfigController($dev, $zones, $thr, $nonces, $cfg);
        $req = $this->signed('GET', '/api/config', 'sek', ['device_id' => 'pi-1'], [], 'stale-nonce', '1000');
        $this->assertSame(401, $c->get($req, now: 5000)->status()); // 4000s > 300 window
    }
    public function testHeartbeatStored(): void {
        $cfg = Config::fromArray([]);
        $dev = new InMemoryDeviceRepository(['pi-1' => 'sek']);
        $nonces = new InMemoryNonceRepository();
        $c = new HeartbeatController($cfg, $dev, $nonces);
        $body = ['device_id' => 'pi-1', 'fps' => 12.0, 'temp' => 55.0, 'throttle' => false, 'config_version' => 7];
        $res = $c->post($this->signed('POST', '/api/heartbeat', 'sek', [], $body), now: 1000);
        $this->assertSame(200, $res->status());
        $this->assertSame(12.0, $dev->heartbeats['pi-1']['fps']);
    }
    public function testHeartbeatRejectsReplayedNonce(): void {
        $cfg = Config::fromArray([]);
        $dev = new InMemoryDeviceRepository(['pi-1' => 'sek']);
        $nonces = new InMemoryNonceRepository();
        $c = new HeartbeatController($cfg, $dev, $nonces);
        $body = ['device_id' => 'pi-1', 'fps' => 12.0, 'temp' => 55.0, 'throttle' => false, 'config_version' => 7];
        $req = $this->signed('POST', '/api/heartbeat', 'sek', [], $body, 'hb-replay', '1000');
        $this->assertSame(200, $c->post($req, now: 1000)->status());
        $this->assertSame(401, $c->post($req, now: 1000)->status()); // same nonce replayed
    }
    public function testHeartbeatRejectsStaleTimestamp(): void {
        $cfg = Config::fromArray([]);
        $dev = new InMemoryDeviceRepository(['pi-1' => 'sek']);
        $nonces = new InMemoryNonceRepository();
        $c = new HeartbeatController($cfg, $dev, $nonces);
        $body = ['device_id' => 'pi-1', 'fps' => 12.0, 'temp' => 55.0, 'throttle' => false, 'config_version' => 7];
        $req = $this->signed('POST', '/api/heartbeat', 'sek', [], $body, 'hb-stale', '1000');
        $this->assertSame(401, $c->post($req, now: 5000)->status()); // 4000s > 300 default window
    }
}