#!/usr/bin/env python3
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#

from gi.repository import GObject, Gtk
from .drawing import Drawing
from .svg import JsonSvg

import json
import gi
gi.require_version("Gtk", "3.0")

import logging
logging.basicConfig(level=logging.DEBUG)
logger = logging.getLogger('drawingperspective')


@Gtk.Template(resource_path="/org/freedesktop/TuhiGui/ui/DrawingPerspective.ui")
class DrawingPerspective(Gtk.Stack):
    __gtype_name__ = "DrawingPerspective"

    image_battery = Gtk.Template.Child()
    flowbox_drawings = Gtk.Template.Child()

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.known_drawings = []

    def _update_drawings(self, device, pspec):
        for ts in self.device.drawings_available:
            if ts in self.known_drawings:
                continue

            self.known_drawings.append(ts)
            js = json.loads(self.device.json(ts))
            svg = JsonSvg(js)
            drawing = Drawing(svg)
            self.flowbox_drawings.add(drawing)

    @GObject.Property
    def device(self):
        return self._device

    @device.setter
    def device(self, device):
        self._device = device

        device.connect('notify::connected', self._on_connected)
        device.connect('notify::listening', self._on_listening_stopped)
        self.device.connect('notify::drawings-available',
                            self._update_drawings)

        # icon name is something like battery-020-charging, or battery-040
        # in 20-step increments
        if device.battery_state == 1:
            state = '-charging'
        else:
            state = ''
        percent = f'{int(device.battery_percent/20) * 20:03d}'
        batt_icon_name = f'battery-{percent}{state}'
        _, isize = self.image_battery.get_icon_name()
        self.image_battery.set_from_icon_name(batt_icon_name, isize)
        self._update_drawings(self.device, None)

        # We always want to sync on startup
        logger.debug(f'{device.name} - starting to listen')
        device.start_listening()

    @GObject.Property
    def name(self):
        return "drawing_perspective"

    def _on_connected(self, device, pspec):
        # Turns out we don't really care about whether the device is
        # connected or not, it has little effect on how we work here
        pass

    def _on_listening_stopped(self, device, pspec):
        if not device.listening:
            logger.debug(f'{device.name} - listening stopped, restarting')
            # We never want to stop listening
            device.start_listening()