/**
 * FormValidation (https://formvalidation.io)
 * The best validation library for JavaScript
 * (c) 2013 - 2020 Nguyen Huu Phuoc <me@phuoc.ng>
 */

/**
 * Validate Chilean national identification number (RUN/RUT)
 *
 * @see http://en.wikipedia.org/wiki/National_identification_number#Chile
 * @see https://palena.sii.cl/cvc/dte/ee_empresas_emisoras.html for samples
 * @returns {ValidateResult}
 */
export default function clId(value: string) {
    if (!/^\d{7,8}[-]{0,1}[0-9K]$/i.test(value)) {
        return {
            meta: {},
            valid: false,
        };
    }
    let v = value.replace(/\-/g, '');
    while (v.length < 9) {
        v = `0${v}`;
    }

    const weight = [3, 2, 7, 6, 5, 4, 3, 2];
    let sum = 0;
    for (let i = 0; i < 8; i++) {
        sum += parseInt(v.charAt(i), 10) * weight[i];
    }
    sum = 11 - sum % 11;

    let cd = `${sum}`;
    if (sum === 11) {
        cd = '0';
    } else if (sum === 10) {
        cd = 'K';
    }
    return {
        meta: {},
        valid: cd === v.charAt(8).toUpperCase(),
    };
}
