function verification(countryCode,phoneNumber) { 
  switch (countryCode) {
    case '+86':
      return verificationChina(phoneNumber);
    case '+1':
        return verificationAmerica(phoneNumber);
    case '+65':
        return verificationSingapore(phoneNumber);
    case '+60':
        return verificationMalaysia(phoneNumber);
    case '+66':
        return verificationThailand(phoneNumber);
    case '+852':
        return verificationHongKong(phoneNumber);
    case '+84':
        return verificationVietnam(phoneNumber);
    default:
      return true;
  }
}


function verificationChina(phoneNumber){
      const phoneRegex = /^1[3-9]\d{9}$/;
      return phoneRegex.test(phoneNumber);
}


function verificationAmerica(phoneNumber){
      const phoneRegex = /^[2-9]\d{2}[- ]?\d{4}$/;
      return phoneRegex.test(phoneNumber);
}
function verificationSingapore(phoneNumber){
      const phoneRegex = /^[89]\d{7}$/;
      return phoneRegex.test(phoneNumber);
}
function verificationMalaysia(phoneNumber){
      const phoneRegex = /^01\d{8}$/;
      return phoneRegex.test(phoneNumber);
}

function verificationHongKong(phoneNumber){
      const phoneRegex = /^0[896]\d{8}$/;
      return phoneRegex.test(phoneNumber);
}


function verificationThailand(phoneNumber){
      const phoneRegex = /^[5-9]\d{7}$/;
      return phoneRegex.test(phoneNumber);
}



function verificationVietnam(phoneNumber){
      const phoneRegex = /^(0)?[3-9]\d{8}$/;
      return phoneRegex.test(phoneNumber);
}

export  {verification}