export const isEmail = (v: string) =>
  /^(([^<>()[\].,;:\s@"]+(\.[^<>()[\].,;:\s@"]+)*)|(".+"))@(([^<>()[\].,;:\s@"]+\.)+[^<>()[\].,;:\s@"]{2,})$/i.test(v)

export function validateTableName(v: string, isGQL = false) {
  if (!v) {
    return 'Table name required'
  }

  // GraphQL naming convention
  // http://spec.graphql.org/June2018/#Name

  if (isGQL) {
    if (/^[_A-Za-z][_0-9A-Za-z]*$/.test(v)) {
      return true
    }

    if (/^[^_A-Za-z]/.test(v)) {
      return 'Name should start with an alphabet or _'
    }
    const m = v.match(/[^_A-Za-z\d]/g)
    if (m) {
      return `Following characters are not allowed ${m.map((c) => JSON.stringify(c)).join(', ')}`
    }
  } else {
    // exclude . / \
    // rest all characters allowed
    // https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/acreldb/n0rfg6x1shw0ppn1cwhco6yn09f7.htm#:~:text=By%20default%2C%20MySQL%20encloses%20column,not%20truncate%20a%20longer%20name.
    const m = v.match(/[./\\]/g)
    if (m) {
      return `Following characters are not allowed ${m.map((c) => JSON.stringify(c)).join(', ')}`
    }

    return true
  }
}

export function validateColumnName(v: string, isGQL = false) {
  if (!v) {
    return 'Column name required'
  }

  // GraphQL naming convention
  // http://spec.graphql.org/June2018/#Name
  if (isGQL) {
    if (/^[_A-Za-z][_0-9A-Za-z]*$/.test(v)) {
      return true
    }

    if (/^[^_A-Za-z]/.test(v)) {
      return 'Name should start with an alphabet or _'
    }
    const m = v.match(/[^_A-Za-z\d]/g)
    if (m) {
      return `Following characters are not allowed ${m.map((c) => JSON.stringify(c)).join(', ')}`
    }
  } else {
    // exclude . / \
    // rest all characters allowed
    // https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/acreldb/n0rfg6x1shw0ppn1cwhco6yn09f7.htm#:~:text=By%20default%2C%20MySQL%20encloses%20column,not%20truncate%20a%20longer%20name.
    const m = v.match(/[./\\]/g)
    if (m) {
      return `Following characters are not allowed ${m.map((c) => JSON.stringify(c)).join(', ')}`
    }

    return true
  }
}