import idCarInfo from "../../utils/idCardInfo"
/**
 * @param yearMin 最小值
 * @param yearMax 最大值
 * @returns 随机生成身份证号
 */
export function getRandomIdcard(yearMin:number = 1000, yearMax:number = 9999) {
  const provinceCodes = idCarInfo.code;

  // 随机省市区 6 位
  const province = provinceCodes[Math.floor(Math.random() * provinceCodes.length)];
  const city = String(Math.floor(1000 + Math.random() * 8999)).substring(0, 2);
  const district = String(Math.floor(1000 + Math.random() * 8999)).substring(0, 2);
  const addressCode = province + city + district;

  // 随机年份
  const year = String(Math.floor(Math.random() * (yearMax - yearMin + 1)) + yearMin);
  const month = String(Math.floor(Math.random() * 12) + 1).padStart(2, '0');
  const day = (() => {
    const daysInMonth = new Date(Number(year), Number(month), 0).getDate();
    return String(Math.floor(Math.random() * daysInMonth) + 1).padStart(2, '0');
  })();
  const birth = year + month + day;

  // 顺序码（3位）
  const seq = String(Math.floor(Math.random() * 999)).padStart(3, '0');

  // 前17位
  const id17 = addressCode + birth + seq;

  // 计算校验码
  const weights = idCarInfo.weights;
  const checkCodes = idCarInfo.checkCodes;
  let sum = 0;
  for (let i = 0; i < 17; i++) {
    sum += Number(id17[i]) * weights[i];
  }
  const checkCode = checkCodes[sum % 11];

  return id17 + checkCode;
}