<?php
declare(strict_types=1);
namespace App\Tests;
use App\Http\Request;
use App\Auth\ArraySessionStore;
use App\Dashboard\{EventListController, EventDetailController, SnapshotProxy, DeviceStatusController};
use App\Tests\Support\{InMemoryEventRepository, InMemorySnapshotRepository, InMemoryAuditRepository,
    InMemoryDeviceRepository};
use PHPUnit\Framework\TestCase;

final class DashboardTest extends TestCase
{
    private function authed(string $role = 'operator'): ArraySessionStore {
        $s = new ArraySessionStore(); $s->set('user_id', 1); $s->set('username', 'u'); $s->set('role', $role); $s->set('csrf', 'tok'); return $s;
    }
    public function testListRequiresAuth(): void {
        $repo = new InMemoryEventRepository();
        $c = new EventListController($repo, new InMemorySnapshotRepository(), new ArraySessionStore());
        $this->assertSame(401, $c->json(new Request('GET', '/api/events', [], '', [], []))->status());
    }
    public function testListReturnsRecent(): void {
        $repo = new InMemoryEventRepository();
        $repo->insert(['severity' => 'high', 'event_type' => 'fall']);
        $c = new EventListController($repo, new InMemorySnapshotRepository(), $this->authed());
        $res = $c->json(new Request('GET', '/api/events', [], '', [], []));
        $this->assertSame(200, $res->status());
        $this->assertCount(1, json_decode($res->body(), true)['events']);
    }
    public function testListPaginatesWithCursor(): void {
        $repo = new InMemoryEventRepository();
        $repo->insert(['severity' => 'high', 'event_type' => 'fall', 'occurred_at' => 100.0]); // id 1
        $repo->insert(['severity' => 'high', 'event_type' => 'fall', 'occurred_at' => 200.0]); // id 2
        $repo->insert(['severity' => 'high', 'event_type' => 'fall', 'occurred_at' => 300.0]); // id 3
        $c = new EventListController($repo, new InMemorySnapshotRepository(), $this->authed());
        // Page 1: the newest two (300, 200); a full page hands back a cursor at the oldest row.
        $p1 = json_decode($c->json(new Request('GET', '/api/events', [], '', ['limit' => '2'], []))->body(), true);
        $this->assertCount(2, $p1['events']);
        $this->assertSame([3, 2], [$p1['events'][0]['event_id'], $p1['events'][1]['event_id']]);
        $this->assertSame('200:2', $p1['next_cursor']);
        // Page 2: following the cursor yields only the older remaining event; short page => no cursor.
        $p2 = json_decode($c->json(new Request('GET', '/api/events', [], '', ['limit' => '2', 'cursor' => $p1['next_cursor']], []))->body(), true);
        $this->assertCount(1, $p2['events']);
        $this->assertSame(1, $p2['events'][0]['event_id']);
        $this->assertNull($p2['next_cursor']);
    }
    public function testCursorPreservesMicrosecondPrecision(): void {
        // Two events whose occurred_at differ only at the microsecond. The cursor must round-trip
        // that value exactly — the old float stringification (precision=14) rounded it and made
        // the page-edge row reappear on the next page (duplicate) or vanish (skip).
        $repo = new InMemoryEventRepository();
        $repo->insert(['severity' => 'high', 'event_type' => 'fall', 'occurred_at' => 1700000000.123456]); // id 1
        $repo->insert(['severity' => 'high', 'event_type' => 'fall', 'occurred_at' => 1700000000.123457]); // id 2
        $c = new EventListController($repo, new InMemorySnapshotRepository(), $this->authed());
        $p1 = json_decode($c->json(new Request('GET', '/api/events', [], '', ['limit' => '1'], []))->body(), true);
        $this->assertSame(2, $p1['events'][0]['event_id']);            // newest first
        $p2 = json_decode($c->json(new Request('GET', '/api/events', [], '', ['limit' => '1', 'cursor' => $p1['next_cursor']], []))->body(), true);
        $this->assertCount(1, $p2['events']);
        $this->assertSame(1, $p2['events'][0]['event_id']);            // id 2 not duplicated, id 1 not skipped
    }
    public function testAcknowledgeRequiresPermissionAndSetsUser(): void {
        $repo = new InMemoryEventRepository();
        $id = $repo->insert(['severity' => 'critical', 'event_type' => 'no_motion']);
        $req = new Request('POST', "/events/$id/ack", ['X-Csrf-Token' => 'tok'], '', [], []);
        // viewer denied (RBAC check fires before CSRF)
        $cv = new EventDetailController($repo, new InMemorySnapshotRepository(), new InMemoryAuditRepository(), $this->authed('viewer'));
        $this->assertSame(403, $cv->acknowledge($req, ['id' => (string)$id])->status());
        // operator allowed
        $co = new EventDetailController($repo, new InMemorySnapshotRepository(), new InMemoryAuditRepository(), $this->authed('operator'));
        $this->assertSame(200, $co->acknowledge($req, ['id' => (string)$id])->status());
        $this->assertSame('u', $repo->find($id)['acknowledged_by']);
    }
    public function testAcknowledgeRejectsMissingOrWrongCsrfToken(): void {
        $repo = new InMemoryEventRepository();
        $id = $repo->insert(['severity' => 'critical', 'event_type' => 'no_motion']);
        $c = new EventDetailController($repo, new InMemorySnapshotRepository(), new InMemoryAuditRepository(), $this->authed('operator'));
        // missing header
        $missing = new Request('POST', "/events/$id/ack", [], '', [], []);
        $this->assertSame(403, $c->acknowledge($missing, ['id' => (string)$id])->status());
        // wrong token
        $wrong = new Request('POST', "/events/$id/ack", ['X-Csrf-Token' => 'nope'], '', [], []);
        $this->assertSame(403, $c->acknowledge($wrong, ['id' => (string)$id])->status());
        // acknowledge did not proceed
        $this->assertNull($repo->find($id)['acknowledged_by']);
    }
    public function testFalsePositiveTagAcknowledgesAndKeepsFirstTagger(): void {
        $repo = new InMemoryEventRepository();
        $id = $repo->insert(['severity' => 'warning', 'event_type' => 'zone_warning']);
        $req = new Request('POST', "/events/$id/false-positive", ['X-Csrf-Token' => 'tok'], '', [], []);
        // viewer denied (same 'acknowledge' permission as ack)
        $cv = new EventDetailController($repo, new InMemorySnapshotRepository(), new InMemoryAuditRepository(), $this->authed('viewer'));
        $this->assertSame(403, $cv->falsePositive($req, ['id' => (string)$id])->status());
        // operator tags: FP set AND acknowledged (an FP is a handled event)
        $co = new EventDetailController($repo, new InMemorySnapshotRepository(), new InMemoryAuditRepository(), $this->authed('operator'));
        $this->assertSame(200, $co->falsePositive($req, ['id' => (string)$id])->status());
        $row = $repo->find($id);
        $this->assertSame('u', $row['false_positive_by']);
        $this->assertSame('u', $row['acknowledged_by']);
        // a second tag by another user must NOT rewrite the original judgement
        $s2 = $this->authed('operator'); $s2->set('username', 'u2');
        $c2 = new EventDetailController($repo, new InMemorySnapshotRepository(), new InMemoryAuditRepository(), $s2);
        $this->assertSame(200, $c2->falsePositive($req, ['id' => (string)$id])->status());
        $this->assertSame('u', $repo->find($id)['false_positive_by']);
    }
    public function testFalsePositiveRejectsBadCsrf(): void {
        $repo = new InMemoryEventRepository();
        $id = $repo->insert(['severity' => 'warning', 'event_type' => 'zone_warning']);
        $c = new EventDetailController($repo, new InMemorySnapshotRepository(), new InMemoryAuditRepository(), $this->authed('operator'));
        $wrong = new Request('POST', "/events/$id/false-positive", ['X-Csrf-Token' => 'nope'], '', [], []);
        $this->assertSame(403, $c->falsePositive($wrong, ['id' => (string)$id])->status());
        $this->assertNull($repo->find($id)['false_positive_by'] ?? null);
    }
    public function testSnapshotProxyAuthAnd404(): void {
        $snaps = new InMemorySnapshotRepository();
        $events = new InMemoryEventRepository();
        $proxy = new SnapshotProxy($snaps, $events, new ArraySessionStore()); // unauth
        $this->assertSame(401, $proxy->serve(new Request('GET', '/snap/x', [], '', [], []), ['uuid' => 'x'])->status());
        $proxy2 = new SnapshotProxy($snaps, $events, $this->authed());
        $this->assertSame(404, $proxy2->serve(new Request('GET', '/snap/missing', [], '', [], []), ['uuid' => 'missing'])->status());
    }

    private function authedSite(string $site): ArraySessionStore {
        $s = $this->authed('operator'); $s->set('site_scope', $site); return $s;
    }
    public function testListIsScopedToTheCallersSite(): void {
        $repo = new InMemoryEventRepository();
        $repo->insert(['severity' => 'high', 'event_type' => 'fall', 'occurred_at' => 1.0, 'site' => 'factory-a']);
        $repo->insert(['severity' => 'high', 'event_type' => 'fall', 'occurred_at' => 2.0, 'site' => 'factory-b']);
        // A factory-a operator sees only the factory-a event.
        $scoped = new EventListController($repo, new InMemorySnapshotRepository(), $this->authedSite('factory-a'));
        $rows = json_decode($scoped->json(new Request('GET', '/api/events', [], '', [], []))->body(), true)['events'];
        $this->assertCount(1, $rows);
        $this->assertSame('factory-a', $rows[0]['site']);
        // A global operator (no site_scope) sees both.
        $global = new EventListController($repo, new InMemorySnapshotRepository(), $this->authed('operator'));
        $all = json_decode($global->json(new Request('GET', '/api/events', [], '', [], []))->body(), true)['events'];
        $this->assertCount(2, $all);
    }
    public function testDetailHidesOtherSitesEvent(): void {
        $repo = new InMemoryEventRepository();
        $id = $repo->insert(['severity' => 'high', 'event_type' => 'fall', 'site' => 'factory-b']);
        $c = new EventDetailController($repo, new InMemorySnapshotRepository(), new InMemoryAuditRepository(), $this->authedSite('factory-a'));
        // 404 (not 403) so a cross-site id is indistinguishable from a non-existent one.
        $this->assertSame(404, $c->show(new Request('GET', "/events/$id", [], '', [], []), ['id' => (string)$id])->status());
        // The owning site sees it.
        $own = new EventDetailController($repo, new InMemorySnapshotRepository(), new InMemoryAuditRepository(), $this->authedSite('factory-b'));
        $this->assertSame(200, $own->show(new Request('GET', "/events/$id", [], '', [], []), ['id' => (string)$id])->status());
    }
    public function testSnapshotServeHidesOtherSitesImage(): void {
        // A real on-disk file so the 404 can only come from the site guard, not a missing file.
        $repo = new InMemoryEventRepository();
        $id = $repo->insert(['severity' => 'high', 'event_type' => 'fall', 'site' => 'factory-b']);
        $file = sys_get_temp_dir() . '/snaptest' . bin2hex(random_bytes(4)) . '.jpg';
        file_put_contents($file, 'jpegbytes');
        $uuid = str_repeat('a', 32);
        $snaps = new class($file, $id, $uuid) implements \App\Repository\SnapshotRepository {
            public function __construct(private string $file, private int $eid, private string $uuid) {}
            public function add(int $e, string $u, string $h): void {}
            public function forEvent(int $e): array { return []; }
            public function thumbUuidsFor(array $ids): array { return []; }
            public function pathByUuid(string $u): ?string { return $u === $this->uuid ? $this->file : null; }
            public function eventIdByUuid(string $u): ?int { return $u === $this->uuid ? $this->eid : null; }
            public function latestForCamera(string $cameraId): ?array { return null; }
            public function purgeOlderThan(int $c): int { return 0; }
        };
        $cross = new SnapshotProxy($snaps, $repo, $this->authedSite('factory-a'));
        $this->assertSame(404, $cross->serve(new Request('GET', '/s', [], '', [], []), ['uuid' => $uuid])->status());
        $same = new SnapshotProxy($snaps, $repo, $this->authedSite('factory-b'));
        $served = $same->serve(new Request('GET', '/s', [], '', [], []), ['uuid' => $uuid]);
        $this->assertSame(200, $served->status());
        // A snapshot is immutable per uuid, so it is browser-cacheable — without this the event
        // list re-downloads every visible JPEG on every 5s poll (a Cafe24 traffic-cap hazard).
        // `private` keeps a shared proxy from serving one site's worker image to another (PIPA).
        $cache = $served->headers()['Cache-Control'] ?? '';
        $this->assertStringContainsString('private', $cache);
        $this->assertStringContainsString('max-age=', $cache);
        @unlink($file);
    }

    public function testEventListAttachesNewestSnapshotThumbnail(): void {
        $repo = new InMemoryEventRepository();
        $withSnap = $repo->insert(['severity' => 'critical', 'event_type' => 'fall', 'occurred_at' => 2.0]);
        $noSnap   = $repo->insert(['severity' => 'info', 'event_type' => 'ghost', 'occurred_at' => 1.0]);
        $snaps = new InMemorySnapshotRepository();
        $snaps->add($withSnap, 'uuidA', 'hashA');
        $snaps->add($withSnap, 'uuidB', 'hashB');   // newer -> this one wins
        $c = new EventListController($repo, $snaps, $this->authed());
        $rows = json_decode($c->json(new Request('GET', '/api/events', [], '', [], []))->body(), true)['events'];
        $byId = [];
        foreach ($rows as $r) $byId[$r['event_id']] = $r;
        $this->assertSame('uuidB', $byId[$withSnap]['thumb_uuid']);  // newest snapshot per event
        $this->assertNull($byId[$noSnap]['thumb_uuid']);            // event with no snapshot
    }

    public function testDeviceStatusRequiresAuth(): void {
        $c = new DeviceStatusController(new InMemoryDeviceRepository(), new ArraySessionStore());
        $this->assertSame(401, $c->json(new Request('GET', '/api/devices', [], '', [], []), 1000)->status());
    }

    public function testDeviceStatusComputesLivenessAndDrift(): void {
        $now = 10000;
        $dev = new InMemoryDeviceRepository([], [], [], [
            ['device_id' => 'pi-online', 'name' => 'A동', 'site' => null, 'last_heartbeat_at' => $now - 30,
             'last_fps' => 12.0, 'last_temp' => 55.0, 'last_throttle' => false, 'config_version' => 3, 'reported_config_version' => 3],
            ['device_id' => 'pi-offline', 'name' => 'B동', 'site' => null, 'last_heartbeat_at' => $now - 600,
             'last_fps' => 0.0, 'last_temp' => 0.0, 'last_throttle' => true, 'config_version' => 1, 'reported_config_version' => 1],
            ['device_id' => 'pi-new', 'name' => null, 'site' => null, 'last_heartbeat_at' => null,
             'last_fps' => null, 'last_temp' => null, 'last_throttle' => null, 'config_version' => 1, 'reported_config_version' => null],
            ['device_id' => 'pi-drift', 'name' => 'C동', 'site' => null, 'last_heartbeat_at' => $now - 10,
             'last_fps' => 10.0, 'last_temp' => 50.0, 'last_throttle' => false, 'config_version' => 5, 'reported_config_version' => 4],
        ]);
        $out = json_decode((new DeviceStatusController($dev, $this->authed()))
            ->json(new Request('GET', '/api/devices', [], '', [], []), $now)->body(), true)['devices'];
        $by = [];
        foreach ($out as $d) $by[$d['device_id']] = $d;
        $this->assertTrue($by['pi-online']['online']);
        $this->assertSame(30, $by['pi-online']['seconds_since']);
        $this->assertFalse($by['pi-offline']['online']);        // 600s past the 120s threshold
        $this->assertFalse($by['pi-new']['online']);            // never reported
        $this->assertNull($by['pi-new']['seconds_since']);
        $this->assertFalse($by['pi-online']['config_drift']);
        $this->assertTrue($by['pi-drift']['config_drift']);     // device on v4, server published v5
    }

    public function testDeviceStatusIsScopedToSite(): void {
        $row = fn (string $id, string $site) => ['device_id' => $id, 'name' => null, 'site' => $site,
            'last_heartbeat_at' => null, 'last_fps' => null, 'last_temp' => null, 'last_throttle' => null,
            'config_version' => 1, 'reported_config_version' => null];
        $dev = new InMemoryDeviceRepository([], [], [], [$row('a1', 'factory-a'), $row('b1', 'factory-b')]);
        $scoped = json_decode((new DeviceStatusController($dev, $this->authedSite('factory-a')))
            ->json(new Request('GET', '/api/devices', [], '', [], []), 1000)->body(), true)['devices'];
        $this->assertCount(1, $scoped);
        $this->assertSame('a1', $scoped[0]['device_id']);
        $all = json_decode((new DeviceStatusController($dev, $this->authed('operator')))
            ->json(new Request('GET', '/api/devices', [], '', [], []), 1000)->body(), true)['devices'];
        $this->assertCount(2, $all);
    }
}