from gi.repository import Gtk, GLib

import Idle


class Locker(object):
    def __init__(self, lockTimeout, doLock, doUnlock, logoutTimeout = None, doLogout = None, updateLogoutTimeout = None):
        self.locked = False
        self.lockTimeout = lockTimeout
        self.logoutTimeout = logoutTimeout
        self.doLock = doLock
        self.doUnlock = doUnlock
        self.doLogout = doLogout
        self.updateLogoutTimeout = updateLogoutTimeout

        if self.lockTimeout > 0:
            GLib.timeout_add_seconds(1, self._checkLock)
        else:
            GLib.idle_add(self.lock)

    def _checkLock(self):
        if self.locked:
            return False

        idle = Idle.getIdleSec()
        if (idle >= self.lockTimeout):
            GLib.idle_add(self.lock)
            return False
        else:
            return True

    def _checkLogout(self):
        self.currentLogoutTimeout = self.currentLogoutTimeout - 1
        if self.updateLogoutTimeout is not None:
            self.updateLogoutTimeout(self.currentLogoutTimeout)

        return self.currentLogoutTimeout > 0

    def lock(self):
        if not self.locked:
            self.doLock(self.logoutTimeout)
            self.locked = True

            if self.doLogout is not None:
                self.currentLogoutTimeout = self.logoutTimeout

                if self.currentLogoutTimeout > 0:
                    GLib.timeout_add_seconds(1, self._checkLogout)

    def unlock(self):
        if self.locked:
            self.doUnlock()
            self.locked = False

            GLib.timeout_add_seconds(1, self._checkLock)

    def _canLogout(self):
        return (self.locked and self.doLogout is not None and self.currentLogoutTimeout <= 0)

    def logout(self):
        if self._canLogout():
            self.doLogout()