# This file is part of Xpra.
# Copyright (C) 2011-2018 Antoine Martin <antoine@xpra.org>
# Xpra is released under the terms of the GNU GPL v2, or, at your option, any
# later version. See the file COPYING for details.

import os
import tempfile

from xpra.os_util import osexpand
from xpra.log import Logger

log = Logger("notify")


class NotifierBase(object):

    def __init__(self, closed_cb=None, action_cb=None):
        #posix only - but degrades ok on non-posix:
        self.dbus_id = os.environ.get("DBUS_SESSION_BUS_ADDRESS", "")
        self.temp_files = {}
        self.closed_cb = closed_cb
        self.action_cb = action_cb
        self.handles_actions = False

    def cleanup(self):
        tf = self.temp_files
        if tf:
            self.temp_files = {}
            for nid in self.temp_files.keys():
                self.clean_notification(nid)

    def show_notify(self, dbus_id, tray, nid, app_name, replaces_nid, app_icon, summary, body, actions, hints, expire_timeout, icon):
        pass

    def get_icon_string(self, nid, app_icon, icon):
        if app_icon and not os.path.isabs(app_icon):
            #safe to use
            return app_icon
        elif icon and icon[0]==b"png":
            icon_data = icon[3]
            from xpra.platform.paths import get_xpra_tmp_dir
            tmp = osexpand(get_xpra_tmp_dir())
            d = tmp
            missing = []
            while d and not os.path.exists(d):
                missing.append(d)
                d = os.path.dirname(d)
            for d in reversed(missing):
                os.mkdir(d, 0o700)
            temp = tempfile.NamedTemporaryFile(mode='w+b', suffix='.png', prefix='xpra-notification-icon-', dir=tmp, delete=False)
            temp.write(icon_data)
            temp.close()
            self.temp_files[nid] = temp.name
            return temp.name
        return ""

    def clean_notification(self, nid):
        try:
            temp_file = self.temp_files.pop(nid)
        except KeyError:
            temp_file = None
        log("clean_notification(%s) temp_file=%s", nid, temp_file)
        if temp_file:
            try:
                os.unlink(temp_file)
            except Exception as e:
                log("failed to remove temporary icon file '%s':", temp_file)
                log(" %s", e)

    def dbus_check(self, dbus_id):
        if self.dbus_id==dbus_id:
            log.warn("remote dbus instance is the same as our local one")
            log.warn(" cannot forward notification to ourself as this would create a loop")
            log.warn(" disable notifications to avoid this warning")
            return  False
        return True
