import subprocess
import hashlib
from .misc import find_prefix
from .zfs import zfs_poolname, \
    zfs_mountpoint, \
    zfs_tag, \
    zfs_untag


def command_bootstrap(args):
    if args.empty and args.non_interactive:
        raise ValueError('--empty and --non-interactive are mutually exclusive')
    version = subprocess.check_output(['freebsd-version']).decode('utf-8')
    print('FreeBSD version:', version)
    tags = args.tags or [ 'freebsd-' + version.split('-')[0], 'freebsd-latest' ]
    sha256 = hashlib.sha256(('FreeBSD ' + version).encode('utf-8')).hexdigest()
    poolname = zfs_poolname()
    name = find_prefix(poolname + '/focker/images/', sha256)
    subprocess.check_output(['zfs', 'create', '-o', 'focker:sha256=' + sha256, name])
    zfs_untag(tags, focker_type='image')
    zfs_tag(name, tags)
    res = None
    if args.non_interactive:
        res = subprocess.run(['focker-bsdinstall', zfs_mountpoint(name)])
    elif not args.empty:
        res = subprocess.run(['bsdinstall', 'jail', zfs_mountpoint(name)])
    if res is not None and res.returncode != 0:
        zfs_run(['zfs', 'destroy', '-r', '-f', name])
        raise ValueError('bsdinstall failed')
    subprocess.check_output(['zfs', 'set', 'rdonly=on', name])
    subprocess.check_output(['zfs', 'snapshot', name + '@1'])