"""WordOps packages repository operations"""
import os

from wo.core.logging import Log
from wo.core.shellexec import WOShellExec
from wo.core.variables import WOVar


class WORepo():
    """Manage Repositories"""

    def __init__(self):
        """Initialize """
        pass

    def add(self, repo_url=None, ppa=None):
        """
        This function used to add apt repositories and or ppa's
        If repo_url is provided adds repo file to
            /etc/apt/sources.list.d/
        If ppa is provided add apt-repository using
            add-apt-repository
        command.
        """

        if repo_url is not None:
            repo_file_path = ("/etc/apt/sources.list.d/" +
                              WOVar().wo_repo_file)
            try:
                if not os.path.isfile(repo_file_path):
                    with open(repo_file_path,
                              encoding='utf-8', mode='a') as repofile:
                        repofile.write(repo_url)
                        repofile.write('\n')
                        repofile.close()
                elif repo_url not in open(repo_file_path,
                                          encoding='utf-8').read():
                    with open(repo_file_path,
                              encoding='utf-8', mode='a') as repofile:
                        repofile.write(repo_url)
                        repofile.write('\n')
                        repofile.close()
                return True
            except IOError as e:
                Log.debug(self, "{0}".format(e))
                Log.error(self, "File I/O error.")
            except Exception as e:
                Log.debug(self, "{0}".format(e))
                Log.error(self, "Unable to add repo")
        if ppa is not None:
            WOShellExec.cmd_exec(
                self, "LC_ALL=C.UTF-8 add-apt-repository -yu '{ppa_name}'"
                .format(ppa_name=ppa))

    def remove(self, ppa=None, repo_url=None):
        """
        This function used to remove ppa's
        If ppa is provided adds repo file to
            /etc/apt/sources.list.d/
        command.
        """
        if ppa:
            WOShellExec.cmd_exec(self, "add-apt-repository -y "
                                 "--remove '{ppa_name}'"
                                 .format(ppa_name=ppa))
        elif repo_url:
            repo_file_path = ("/etc/apt/sources.list.d/" +
                              WOVar().wo_repo_file)

            try:
                repofile = open(repo_file_path, "w+")
                repofile.write(repofile.read().replace(repo_url, ""))
                repofile.close()
            except IOError as e:
                Log.debug(self, "{0}".format(e))
                Log.error(self, "File I/O error.")
            except Exception as e:
                Log.debug(self, "{0}".format(e))
                Log.error(self, "Unable to remove repo")

    def add_key(self, keyid, keyserver=None):
        """
        This function adds imports repository keys from keyserver.
        default keyserver is hkp://keyserver.ubuntu.com
        user can provide other keyserver with keyserver="hkp://xyz"
        """
        try:
            WOShellExec.cmd_exec(
                self, "apt-key adv --keyserver {serv}"
                .format(serv=(keyserver or
                              "hkp://keyserver.ubuntu.com")) +
                " --recv-keys {key}".format(key=keyid))
        except Exception as e:
            Log.debug(self, "{0}".format(e))
            Log.error(self, "Unable to import repo key")

    def add_keys(self, keyids, keyserver=None):
        """
        This function adds imports repository keys from keyserver.
        default keyserver is hkp://keyserver.ubuntu.com
        user can provide other keyserver with keyserver="hkp://xyz"
        """
        all_keys = ' '.join(keyids)
        try:
            WOShellExec.cmd_exec(
                self, "apt-key adv --keyserver {serv}"
                .format(serv=(keyserver or
                              "hkp://keyserver.ubuntu.com")) +
                " --recv-keys {keys}".format(keys=all_keys))
        except Exception as e:
            Log.debug(self, "{0}".format(e))
            Log.error(self, "Unable to import repo keys")
