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from image_creator.os_type.unix import Unix

import re


class Freebsd(Unix):
    """OS class for FreeBSD Unix-like os"""
    def __init__(self, rootdev, ghandler, output):
        super(Freebsd, self).__init__(rootdev, ghandler, output)

        self.meta["USERS"] = " ".join(self._get_passworded_users())

        # Delete the USERS metadata if empty
        if not len(self.meta['USERS']):
            self.out.warn("No passworded users found!")
            del self.meta['USERS']

    def _get_passworded_users(self):
        users = []
        regexp = re.compile(
            '^([^:]+):((?:![^:]+)|(?:[^!*][^:]+)|):(?:[^:]*:){7}(?:[^:]*)'
        )

        for line in self.g.cat('/etc/master.passwd').splitlines():
            line = line.split('#')[0]
            match = regexp.match(line)
            if not match:
                continue

            user, passwd = match.groups()
            if len(passwd) > 0 and passwd[0] == '!':
                self.out.warn("Ignoring locked %s account." % user)
            else:
                users.append(user)

        return users

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