#!/usr/bin/python3
import ressenger_exceptions, ressenger_cryptography
import pathlib, shutil, pickle

def initialise(password, b32address, username='default', port=5273, nick='John Doe', force=False):
    profile_path=pathlib.Path('~/.ressenger/').expanduser()
    if profile_path.exists():
        if (profile_path.is_file() or profile_path.is_symlink()):
            if force:
                profile_path.unlink()
            else:
                raise FileExistsError('Cannot create ~/.ressenger/ folder, is a file exists there?')
    profile_path.mkdir(parents=True, exist_ok=True)
    user_path=pathlib.Path(f'~/.ressenger/{username}').expanduser()
    if user_path.exists():
        if force:
            if (user_path.is_file() or user_path.is_symlink()):
                user_path.unlink()
            else:
                shutil.rmtree(user_path)
        else:
            raise FileExistsError(f'Cannot create ~/.ressenger/{username} file, is a file exists there?')
    enc_pri, enc_pub=ressenger_cryptography.generate_keypair()
    sig_pri, sig_pub=ressenger_cryptography.generate_keypair()
    with open(user_path, 'wb') as file:
        file.write(ressenger_cryptography.encrypt_bytes(pickle.dumps({'port':port, 'b32address':b32address, 'enc_pri':enc_pri, 'enc_pub':enc_pub, 'sig_pri':sig_pri, 'sig_pub':sig_pub, 'contacts':{}, 'events':{}}, protocol=pickle.HIGHEST_PROTOCOL), password))