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#!/usr/bin/env python3

import serial

import tkinter as tk
from tkinter import Text
import pystray
from pystray import MenuItem as item
from PIL import Image, ImageTk

import threading
from os import path
import sys

from zope import component
import interfaces
from interfaces import endpoint
from interfaces.message import IMessage, Debug

import configparser

script_path = path.dirname(path.realpath(__file__))
config_file = path.join(script_path, "config.ini")

config = configparser.ConfigParser(delimiters="=")
config.read(config_file)

init_mapping = config["mapping"]
mapping = dict(init_mapping)

from queue import Queue
q = Queue()

component.provideAdapter(interfaces.endpoint.EndPoint)

#
# Guess the platform and the load the corresponding event listener
#

from sys import platform
if platform == "win32":
    import win32
    window_listener = win32.Listener(mapping, q)
    component.provideUtility(window_listener, interfaces.desktopEvent.IDesktop)
    window_listener.start()

elif platform == 'linux':
    import xlib
    xlib_listener = xlib.Listener(mapping, q)
    component.provideUtility(xlib_listener, interfaces.desktopEvent.IDesktop)
    xlib_listener.start()

#
# How to connect to the peripherical
#

if config.has_section("connection.serial"):

    from serial_conn import SerialConnection
    endpoint = component.queryAdapter(SerialConnection(config["connection.serial"]), endpoint.IEndpoint)
    endpoint.queue = q
    endpoint.connect()
    component.provideUtility(endpoint, interfaces.endpoint.IEndpoint)

elif config.has_section("connection.socket"):

    from socket_conn import SocketConnection
    endpoint = component.queryAdapter(SocketConnection(config["connection.socket"]), endpoint.IEndpoint)
    endpoint.queue = q
    component.provideUtility(endpoint, interfaces.endpoint.IEndpoint)
    endpoint.connect()

if config.has_section("socket.serve"):

    import socketserver
    server = socketserver.Handler(config["socket.serve"], q)
else:
    server = None


class Icon(object):

    def __init__(self, image):
        menu=(
                item('Quit', self.quit_window), 
                item('Show', self.show_window, default=True),
                item('Reset',self.reset),
            )
        self.icon=pystray.Icon("name", image, "Macropad companion", menu)

        self.stop = threading.Event()
        self.show_hide = threading.Event()

        # Start the icon into a new thread in order to keep the main loop
        # control
        icon_thread = threading.Thread(target=self.icon.run)
        self.icon_thread = icon_thread

    def start(self):
        self.icon_thread.start()

    def quit(self):
        self.icon.stop()

    def quit_window(self):
        self.stop.set()

    def show_window(self):
        self.show_hide.set()

    def reset(self):
        # Create a copy of the dictonnary before updating the keys
        tmp_mapping = dict(mapping)
        for key in tmp_mapping.keys() :
            if key not in init_mapping.keys():
                del mapping[key]

import json
class Application(object):

    def __init__(self):
        self.window = tk.Tk()
        self.text = Text(self.window, height=8)
        ## State of the #pplication
        self.running = True
        self.visible = False
        self.focused_window = None
        self.last_layout = None

        component.provideHandler(self.log)

        # Window property
        self.window.withdraw()
        self.window.title("Macropad companion")
        icon = path.join(script_path, "favicon.ico")
        try:
            self.window.iconbitmap(icon)
        except:
            pass
        self.text.pack()

        # When closing, return back to the iconified mode
        self.window.protocol("WM_DELETE_WINDOW", self.hide)
        # Start the application in iconified mode
        image=Image.open(icon)
        self.icon = Icon(image)
        self.icon.start()
        component.handle(Debug("Started"))

    def hide(self):
        self.icon.show_hide.clear()
        self.visible = False
        self.window.withdraw()
        self.update()


    def update(self):
        if self.icon.stop.is_set():
            self.icon.quit()
            self.running = False
            self.window.destroy()
            component.queryUtility(interfaces.desktopEvent.IDesktop).stop()
            return

        if self.icon.show_hide.is_set():
            if not self.visible:
                self.window.deiconify()
            else:
                self.window.withdraw()
            self.icon.show_hide.clear()
            self.visible = not self.visible

    @component.adapter(IMessage)
    def log(self, message : str):
        print(message.content)
        try:
            f = open("/tmp/macropad.log", "a")
            f.write(message.content)
            f.write("\n")
            f.close()
            self.text.insert("1.0", "\n")
            self.text.insert("1.0", message.content)
            self.text.delete("200.0", "end")
        except Exception as e:
            print(e)

    def send(self, data: str):
        if data == self.last_layout:
            return
        self.last_layout = data

        if isinstance(data, dict):
            component.queryUtility(interfaces.endpoint.IEndpoint).send(data)
            return
        elif isinstance(data, str):
            if not path.exists(data):
                print("The file '%s' does not exists" % data)
                return
            with open(data, "r") as json_file:
                json_data = json_file.read()
                j = json.loads(json_data)
                content = json.dumps(j)
    
                component.queryUtility(interfaces.endpoint.IEndpoint).send(j)

    def associate(self, layout: str, name: str):
      mapping[name] = layout
      component.handle(Debug("Associating %s with %s" % (name, layout)))

    def exec(self):
        try:
            self.update()
            if server is not None: server.update()
            conn = component.queryUtility(interfaces.endpoint.IEndpoint)
            if not conn.isConnected():
                component.handle(Debug("Reconnecting…"))
    
                conn.state = conn.STATE_CONNECTING
                self.window.after(5000, conn.connect)
            else:
                conn.fetch()
        except Exception as e:
            component.handle(Debug( str(e) ))
            print(e)
            # Got any error, stop the application properly
            self.icon.stop.set()

        if app.running:
            self.window.after(200, self.exec)

        while not q.empty():
            last_layout, app_ = q.get(False)
            self.send(last_layout)
            if app_ is not None: self.associate(last_layout, app_)

if __name__ == '__main__':
    app = Application()

    # Initialize the main loop
    app.exec()
    try:
        app.window.mainloop()
    except:
        app.running = False
        app.window.destroy()
        app.icon.quit()
        component.queryUtility(interfaces.desktopEvent.IDesktop).stop()