<?php // phpcs:ignoreFile

require __DIR__ . '/../session.php';
require __DIR__ . '/../userAccess.php';
require __DIR__ . '/../includes/db.php';

header('Content-Type: application/json; charset=utf-8');

$deviceId = isset($_GET['device_id']) ? (int) $_GET['device_id'] : 0;
$minutes = isset($_GET['minutes']) ? (int) $_GET['minutes'] : 60;
$limit = isset($_GET['limit']) ? (int) $_GET['limit'] : 0;

if ($deviceId <= 0) {
    echo json_encode([
        'success' => false,
        'message' => 'device_id parameter is required.',
    ]);
    exit;
}

$minutes = max(1, min(1440, $minutes));
$limit = $limit > 0 ? min($limit, 5000) : 1500;

try {
    $connection = controls_db_connect();
} catch (Throwable $exception) {
    echo json_encode([
        'success' => false,
        'message' => 'Database connection failed: ' . $exception->getMessage(),
    ]);
    exit;
}

$startTime = (new DateTimeImmutable('now', new DateTimeZone('UTC')))
    ->modify(sprintf('-%d minutes', $minutes));
$startBound = $startTime->format('Y-m-d H:i:s');

try {
    $statement = $connection->prepare(
        'SELECT checked_at, latency_ms, status '
        . 'FROM monitoring_latency_log '
        . 'WHERE device_id = ? AND checked_at >= ? '
        . 'ORDER BY checked_at ASC '
        . 'LIMIT ?'
    );
    $statement->bind_param('isi', $deviceId, $startBound, $limit);
    $statement->execute();
    $result = $statement->get_result();

    $series = [];
    while ($row = $result->fetch_assoc()) {
        $series[] = [
            'x' => gmdate('c', strtotime($row['checked_at'])),
            'y' => $row['latency_ms'] !== null ? (float) $row['latency_ms'] : null,
            'status' => $row['status'],
        ];
    }

    $statement->close();
    $connection->close();

    echo json_encode([
        'success' => true,
        'data' => $series,
    ]);
} catch (Throwable $exception) {
    if (isset($statement) && $statement instanceof mysqli_stmt) {
        $statement->close();
    }

    $connection->close();

    echo json_encode([
        'success' => false,
        'message' => 'Query failed: ' . $exception->getMessage(),
    ]);
}