/** Dev fixture prefixes (import script / dev_fixture.php). */
export function isDevTestClientCode(code) {
    const c = String(code ?? '').trim();
    return c.toUpperCase().startsWith('DEV-CL-');
}

export function isDevTestUsername(username) {
    return String(username ?? '').trim().toLowerCase().startsWith('dev_');
}

export function testDataRowClassForClient(clientCode) {
    return isDevTestClientCode(clientCode) ? ' row-test-data' : '';
}

export function testDataRowClassForUser(username) {
    return isDevTestUsername(username) ? ' row-test-data' : '';
}

/** Local question key from full questionID (hash__q5 → q5). */
export function questionLocalKey(questionID, fallback = '') {
    const id = String(questionID ?? '');
    const sep = id.lastIndexOf('__');
    if (sep >= 0) return id.slice(sep + 2);
    return fallback || id;
}

/** header_order.json column id → question key (questionnaire_x-y → y). */
export function headerColumnQuestionKey(headerId) {
    const id = String(headerId ?? '');
    if (id === 'client_code') return 'client_code';
    const dash = id.indexOf('-');
    if (dash < 0) return id;
    return id.slice(dash + 1);
}