/**
 * 
 * @ignore
 */
export function containsValidProofStatement(searchText: string, name: string | null = null) {
  if (!name) {
    return false
  }

  searchText = searchText.toLowerCase()

  if (name.split('.').length < 2) {
    throw new Error('Please provide the fully qualified Blockstack name.')
  }

  let username = null

  // support legacy Blockstack ID proofs
  if (name.endsWith('.id')) {
    username = name.split('.id')[0]
  }

  const verificationStyles = username != null ? [
    `verifying myself: my bitcoin username is +${username}`,
    `verifying myself: my bitcoin username is ${username}`,
    `verifying myself: my openname is ${username}`,
    `verifying that +${username} is my bitcoin username`,
    `verifying that ${username} is my bitcoin username`,
    `verifying that ${username} is my openname`,
    `verifying that +${username} is my openname`,
    `verifying i am +${username} on my passcard`,
    `verifying that +${username} is my blockchain id`,
    `verifying that "${name}" is my blockstack id`, // id
    `verifying that ${name} is my blockstack id`,
    `verifying that &quot;${name}&quot; is my blockstack id`
  ] : [ // only these formats are valid for non-.id tlds
    `verifying that "${name}" is my blockstack id`, // id
    `verifying that ${name} is my blockstack id`,
    `verifying that &quot;${name}&quot; is my blockstack id`
  ]

  for (let i = 0; i < verificationStyles.length; i++) {
    const verificationStyle = verificationStyles[i]
    if (searchText.includes(verificationStyle)) {
      return true
    }
  }

  if (username != null
      && searchText.includes('verifymyonename')
      && searchText.includes(`+${username}`)) {
    return true
  }

  return false
}

/**
 * 
 * @ignore
 */
export function containsValidAddressProofStatement(proofStatement: string, address: string) {
  proofStatement = proofStatement.split(address)[0].toLowerCase() + address

  const verificationStyles = [
    `verifying my blockstack id is secured with the address ${address}`
  ]

  for (let i = 0; i < verificationStyles.length; i++) {
    const verificationStyle = verificationStyles[i]
    if (proofStatement.includes(verificationStyle)) {
      return true
    }
  }

  return false
}