<?php // phpcs:ignoreFile

require __DIR__ . '/../session.php';

if (($_SESSION['SESS_MEMBER_LEVEL'] ?? '') !== 'controls') {
    http_response_code(403);
    header('Content-Type: application/json');
    echo json_encode([
        'success' => false,
        'message' => 'Access denied.',
    ]);
    exit;
}

require __DIR__ . '/../includes/control-tags.php';
require __DIR__ . '/../includes/kepware-rest.php';

header('Content-Type: application/json');

$idRaw = $_GET['id'] ?? '';
$id = is_string($idRaw) ? trim($idRaw) : '';

if ($id === '') {
    http_response_code(400);
    echo json_encode([
        'success' => false,
        'message' => 'A valid tag id is required.',
    ]);
    exit;
}

$tag = control_tag_find($id);

if ($tag === null) {
    http_response_code(404);
    echo json_encode([
        'success' => false,
        'message' => 'Tag not configured for overrides.',
    ]);
    exit;
}

try {
    $read = kepware_read([$tag['id']]);
    $result = $read[$tag['id']] ?? null;

    if ($result === null) {
        http_response_code(502);
        echo json_encode([
            'success' => false,
            'message' => 'Kepware did not return data for the requested tag.',
        ]);
        exit;
    }

    $rawValue = $result['value'] ?? null;
    $timestamp = isset($result['timestamp']) && is_string($result['timestamp']) ? $result['timestamp'] : null;
    $status = isset($result['status']) ? $result['status'] : null;

    $numericValue = null;
    if (is_numeric($rawValue)) {
        $numericValue = (float) $rawValue;
    }

    $responseValue = $numericValue ?? $rawValue;

    echo json_encode([
        'success' => true,
        'data' => [
            'id' => $tag['id'],
            'name' => $tag['name'],
            'value' => $responseValue,
            'control' => 1,
            'type' => $tag['type_label'],
            'control_mode' => $tag['control_mode'],
            'source_idnumber' => $tag['config']['source'] ?? $tag['id'],
            'timestamp' => $timestamp,
            'displayTimestamp' => control_format_timestamp($timestamp),
            'status' => $status,
            'units' => $tag['units'] ?? null,
            'description' => $tag['description'] ?? null,
        ],
    ]);
} catch (Throwable $exception) {
    error_log('Kepware read failed: ' . $exception->getMessage());
    http_response_code(502);
    echo json_encode([
        'success' => false,
        'message' => 'Failed to read tag value from Kepware.',
        'details' => $exception->getMessage(),
    ]);
}