<?php
declare(strict_types=1);
namespace App\Tests;

use App\Repository\Pdo\{PdoNonceRepository, PdoEventRepository, PdoZoneRepository};
use PDO;
use PHPUnit\Framework\TestCase;
use RuntimeException;

/**
 * Gated DB-integration test: exercises the PDO repositories against a real
 * sqlite :memory: database instead of the in-memory test doubles used
 * elsewhere in the suite. This host has no pdo_sqlite driver loaded
 * (PDO::getAvailableDrivers() does not include 'sqlite'), so setUp() skips
 * the whole class -- the suite must stay green with this test reported as
 * SKIPPED, not failed. On a host with pdo_sqlite available (or in CI), this
 * test runs for real and round-trips Nonce, Event, and Zone -- the three
 * repositories whose SQL is portable between MySQL and sqlite (no
 * MySQL-only `ON DUPLICATE KEY UPDATE`, which PdoRateLimiterRepository uses
 * and is therefore intentionally not covered here).
 */
final class PdoIntegrationTest extends TestCase
{
    private PDO $pdo;

    protected function setUp(): void
    {
        if (!in_array('sqlite', PDO::getAvailableDrivers(), true)) {
            $this->markTestSkipped('pdo_sqlite not available on this host');
        }

        $this->pdo = new PDO('sqlite::memory:', null, null, [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        ]);
        $this->pdo->exec(self::sqliteSchema());
    }

    public function testNonceRoundTrip(): void
    {
        $repo = new PdoNonceRepository($this->pdo);
        $this->assertFalse($repo->seen('n1'));
        $repo->remember('n1', 9999999999);
        $this->assertTrue($repo->seen('n1'));
    }

    public function testEventInsertFindAcknowledge(): void
    {
        $repo = new PdoEventRepository($this->pdo);
        $uuid = str_repeat('a', 32);
        $id = $repo->insert([
            'event_uuid' => $uuid,
            'device_id' => 'dev-1',
            'site' => 'factory-a',
            'camera_id' => 'cam-1',
            'event_type' => 'fall',
            'severity' => 'critical',
            'track_id' => 7,
            'zone_id' => null,
            'occurred_at' => 1700000000.5,
            'duration_s' => 2.5,
            'metrics' => ['confidence' => 0.9],
        ]);
        $this->assertGreaterThan(0, $id);

        $found = $repo->find($id);
        $this->assertNotNull($found);
        $this->assertSame('dev-1', $found['device_id']);
        $this->assertSame('factory-a', $found['site']);
        $this->assertSame($uuid, $found['event_uuid']);
        $this->assertSame('critical', $found['severity']);
        $this->assertSame(['confidence' => 0.9], $found['metrics']);
        $this->assertNull($found['acknowledged_by']);

        // Idempotency key lookup (P1-9).
        $this->assertSame($id, $repo->idByUuid($uuid));
        $this->assertNull($repo->idByUuid(str_repeat('z', 32)));

        // Site-scoped page (P3-2b): matches its own site, excluded from another.
        $this->assertCount(1, $repo->page(10, null, null, null, 'factory-a'));
        $this->assertCount(0, $repo->page(10, null, null, null, 'factory-b'));

        $recent = $repo->recent(10, 'critical');
        $this->assertCount(1, $recent);
        $this->assertSame([], $repo->recent(10, 'info'));

        $this->assertTrue($repo->acknowledge($id, 'alice'));
        $this->assertSame('alice', $repo->find($id)['acknowledged_by']);
        $this->assertFalse($repo->acknowledge(999999, 'bob'));
    }

    public function testZoneSaveIsOwnershipScoped(): void
    {
        $repo = new PdoZoneRepository($this->pdo);

        $zoneId = $repo->save([
            'zone_id' => null,
            'device_id' => 'dev-1',
            'camera_id' => 'cam-1',
            'level' => 'warning',
            'polygon_json' => '[[0,0],[1,0],[1,1]]',
        ]);
        $this->assertNotSame('', $zoneId);
        $this->assertCount(1, $repo->forCamera('cam-1'));

        // Legitimate update by the owning device/camera succeeds.
        $again = $repo->save([
            'zone_id' => $zoneId,
            'device_id' => 'dev-1',
            'camera_id' => 'cam-1',
            'level' => 'restricted',
            'polygon_json' => '[[0,0],[2,0],[2,2]]',
        ]);
        $this->assertSame($zoneId, $again);

        // Supplying the same zone_id under a different device/camera must not
        // silently overwrite it -- this is the cross-tenant guard from the
        // Task 13 review.
        $this->expectException(RuntimeException::class);
        $repo->save([
            'zone_id' => $zoneId,
            'device_id' => 'dev-2',
            'camera_id' => 'cam-2',
            'level' => 'pinch',
            'polygon_json' => '[[9,9],[9,8],[8,8]]',
        ]);
    }

    public function testZoneDelete(): void
    {
        $repo = new PdoZoneRepository($this->pdo);
        $zoneId = $repo->save([
            'zone_id' => null,
            'device_id' => 'dev-1',
            'camera_id' => 'cam-1',
            'level' => 'warning',
            'polygon_json' => '[[0,0],[1,0],[1,1]]',
        ]);
        $this->assertTrue($repo->delete($zoneId));
        $this->assertFalse($repo->delete($zoneId));
    }

    /**
     * Minimal sqlite-flavored translation of the nonces/events/zones tables
     * in ../schema.sql (see that file's "sqlite compatibility notes" header
     * for the general MySQL -> sqlite mapping rules applied here).
     */
    private static function sqliteSchema(): string
    {
        return <<<'SQL'
            CREATE TABLE move_nonces (
                nonce      TEXT PRIMARY KEY,
                expires_at INTEGER NOT NULL
            );

            CREATE TABLE move_events (
                event_id        INTEGER PRIMARY KEY AUTOINCREMENT,
                event_uuid      TEXT UNIQUE,
                device_id       TEXT NOT NULL,
                site            TEXT,
                camera_id       TEXT NOT NULL,
                event_type      TEXT NOT NULL,
                severity        TEXT NOT NULL,
                track_id        INTEGER,
                zone_id         TEXT,
                occurred_at     REAL NOT NULL,
                duration_s      REAL NOT NULL DEFAULT 0,
                metrics_json    TEXT,
                spatial_x       REAL,
                spatial_y       REAL,
                acknowledged_by TEXT,
                acknowledged_at INTEGER,
                false_positive_by TEXT,
                false_positive_at INTEGER,
                received_at     INTEGER NOT NULL
            );

            CREATE TABLE move_zones (
                zone_id      TEXT PRIMARY KEY,
                device_id    TEXT NOT NULL,
                camera_id    TEXT NOT NULL,
                level        TEXT NOT NULL,
                polygon_json TEXT NOT NULL,
                rules_json   TEXT,
                updated_at   INTEGER NOT NULL
            );
            SQL;
    }
}