'''
    Onionr - Private P2P Communication

    This module defines user ID-related CLI commands
'''
'''
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
'''

import sys, getpass
import logger, onionrexceptions
from onionrutils import stringvalidators, bytesconverter
from onionrusers import onionrusers, contactmanager
import config
from coredb import keydb
import keymanager, onionrcrypto
import unpaddedbase32
from etc import onionrvalues
DETERMINISTIC_REQUIREMENT = onionrvalues.PASSWORD_LENGTH
def add_ID():
    key_manager = keymanager.KeyManager()
    try:
        sys.argv[2]
        if not sys.argv[2].lower() == 'true': raise ValueError
    except (IndexError, ValueError) as e:
        newID = key_manager.addKey()[0]
    else:
        logger.warn('Deterministic keys require random and long passphrases.', terminal=True)
        logger.warn('If a good passphrase is not used, your key can be easily stolen.', terminal=True)
        logger.warn('You should use a series of hard to guess words, see this for reference: https://www.xkcd.com/936/', terminal=True)
        try:
            pass1 = getpass.getpass(prompt='Enter at least %s characters: ' % (DETERMINISTIC_REQUIREMENT,))
            pass2 = getpass.getpass(prompt='Confirm entry: ')
        except KeyboardInterrupt:
            sys.exit(42)
        if onionrcrypto.cryptoutils.safe_compare(pass1, pass2):
            try:
                logger.info('Generating deterministic key. This can take a while.', terminal=True)
                newID, privKey = onionrcrypto.generate_deterministic(pass1)
            except onionrexceptions.PasswordStrengthError:
                logger.error('Passphrase must use at least %s characters.' % (DETERMINISTIC_REQUIREMENT,), terminal=True)
                sys.exit(1)
        else:
            logger.error('Passwords do not match.', terminal=True)
            sys.exit(1)
        try:
            key_manager.addKey(pubKey=newID, 
            privKey=privKey)
        except ValueError:
            logger.error('That ID is already available, you can change to it with the change-id command.', terminal=True)
            return
    logger.info('Added ID: %s' % (bytesconverter.bytes_to_str(newID),), terminal=True)

def change_ID():
    key_manager = keymanager.KeyManager()
    try:
        key = sys.argv[2]
        key = unpaddedbase32.repad(key.encode()).decode()
    except IndexError:
        logger.warn('Specify pubkey to use', terminal=True)
    else:
        if stringvalidators.validate_pub_key(key):
            if key in key_manager.getPubkeyList():
                config.set('general.public_key', key)
                config.save()
                logger.info('Set active key to: %s' % (key,), terminal=True)
                logger.info('Restart Onionr if it is running.', terminal=True)
            else:
                logger.warn('That key does not exist', terminal=True)
        else:
            logger.warn('Invalid key %s' % (key,), terminal=True)