# specialized Xrn class for PlanetLab
import re
from sfa.util.xrn import Xrn, get_authority

# temporary helper functions to use this module instead of namespace


def hostname_to_hrn(auth, login_base, hostname):
    return PlXrn(auth=auth + '.' + login_base, hostname=hostname).get_hrn()


def hostname_to_urn(auth, login_base, hostname):
    return PlXrn(auth=auth + '.' + login_base, hostname=hostname).get_urn()


def slicename_to_hrn(auth_hrn, slicename):
    return PlXrn(auth=auth_hrn, slicename=slicename).get_hrn()


def email_to_hrn(auth_hrn, email):
    return PlXrn(auth=auth_hrn, email=email).get_hrn()


def hrn_to_pl_slicename(hrn):
    return PlXrn(xrn=hrn, type='slice').pl_slicename()
# removed-dangerous - was used for non-slice objects
# def hrn_to_pl_login_base (hrn):
#    return PlXrn(xrn=hrn,type='slice').pl_login_base()


def hrn_to_pl_authname(hrn):
    return PlXrn(xrn=hrn, type='any').pl_authname()


def xrn_to_hostname(hrn):
    return Xrn.unescape(PlXrn(xrn=hrn, type='node').get_leaf())

# helpers to handle external objects created via fedaration


def top_auth(hrn):
    return hrn.split('.')[0]


def hash_loginbase(site_hrn):
    if len(site_hrn) <= 12:
        return site_hrn.replace('.', '8').replace('_', '8')
    ratio = float(12) / len(site_hrn)
    auths_tab = site_hrn.split('.')
    auths_tab2 = []
    for auth in auths_tab:

        auth = auth.replace('_', '8')
        auth2 = auth[:int(len(auth) * ratio)]
        auths_tab2.append(auth2)
    return '8'.join(auths_tab2)


class PlXrn (Xrn):

    @staticmethod
    def site_hrn(auth, login_base):
        return '.'.join([auth, login_base])

    def __init__(self, auth=None, hostname=None, slicename=None, email=None, interface=None, **kwargs):
        # def hostname_to_hrn(auth_hrn, login_base, hostname):
        if hostname is not None:
            self.type = 'node'
            # keep only the first part of the DNS name
            #self.hrn='.'.join( [auth,hostname.split(".")[0] ] )
            # escape the '.' in the hostname
            self.hrn = '.'.join([auth, Xrn.escape(hostname)])
            self.hrn_to_urn()
        # def slicename_to_hrn(auth_hrn, slicename):
        elif slicename is not None:
            self.type = 'slice'
            # split at the first _
            parts = slicename.split("_", 1)
            self.hrn = ".".join([auth] + parts)
            self.hrn_to_urn()
        # def email_to_hrn(auth_hrn, email):
        elif email is not None:
            self.type = 'person'
            # keep only the part before '@' and replace special chars into _
            self.hrn = '.'.join(
                [auth, email.split('@')[0].replace(".", "_").replace("+", "_")])
            self.hrn_to_urn()
        elif interface is not None:
            self.type = 'interface'
            self.hrn = auth + '.' + interface
            self.hrn_to_urn()
        else:
            Xrn.__init__(self, **kwargs)

    # def hrn_to_pl_slicename(hrn):
    def pl_slicename(self):
        self._normalize()
        leaf = self.leaf
        sliver_id_parts = leaf.split(':')
        name = sliver_id_parts[0]
        name = re.sub('[^a-zA-Z0-9_]', '', name)
        return self.pl_login_base() + '_' + name

    # def hrn_to_pl_authname(hrn):
    def pl_authname(self):
        self._normalize()
        return self.authority[-1]

    def interface_name(self):
        self._normalize()
        return self.leaf

    def pl_login_base(self):
        self._normalize()
        if self.type and self.type.startswith('authority'):
            base = self.leaf
        else:
            base = self.authority[-1]

        # Fix up names of GENI Federates
        base = base.lower()
        base = re.sub('[\\\\]*[^a-zA-Z0-9]', '', base)

        return base

tests = [
    'inria.foo.x',
    'in.foo.x_y',
    'inria.foo.longer',
    'onelab.upmc.fit_demo',
    'onelab.upmc.fit_demo.some_other',
]

if __name__ == '__main__':
    for test in tests:
        print(("{} - hash_loginbase -> {}".format(test, hash_loginbase(test))))