"""
 *REALLY* Small framework for creating/manipulating/deleting gui elements in Tkinter.
 
 NOTE: keep this synced with ui.js
 
 Author: Raphael Mannadiar
 Date: 2014/08/21
"""

import Tkinter as tk
from python_runtime.statecharts_core import Event
from drawing import drawing
from utils import utils


class ui:
	window = None
	__nextWindowId = 0

	EVENTS = utils._bunch(
		KEY_PRESS = 			'<Key>',
		MOUSE_CLICK = 			'<Button>',
		MOUSE_MOVE = 			'<Motion>',
		MOUSE_PRESS =			'<ButtonPress>',
		MOUSE_RELEASE =		'<ButtonRelease>',
		MOUSE_RIGHT_CLICK =	'<Button-3>',
		WINDOW_CLOSE = 		'WM_DELETE_WINDOW');

	MOUSE_BUTTONS = utils._bunch(
		LEFT		= 1,
		MIDDLE	= 2,
		RIGHT		= 3);

	KEYCODES	= utils._bunch(
		DELETE	= 46);

	@staticmethod
	def append_button(_window,text):
		button = tk.Button(_window, text=text)
		button.pack()
		return ui.wrap_element(button)


	@staticmethod
	def append_canvas(_window,width,height,style):
		canvas = tk.Canvas(_window,width=width,height=height)
		canvas.config(**style)
		canvas.pack()
		return drawing.canvas_wrapper(canvas)


	@staticmethod
	def bind_event(source,event,controller,raise_name,port="ui",time_offset=0.0):

		def __handle_event(ev=None):
			if event == ui.EVENTS.KEY_PRESS :
				controller.addInput(Event(raise_name, port, [ev.keycode,source]),time_offset)

			elif event == ui.EVENTS.MOUSE_CLICK or \
				  event == ui.EVENTS.MOUSE_MOVE or \
				  event == ui.EVENTS.MOUSE_PRESS or \
				  event == ui.EVENTS.MOUSE_RELEASE or \
		  		  event == ui.EVENTS.MOUSE_RIGHT_CLICK :
				controller.addInput(Event(raise_name, port, [ev.x, ev.y, ev.num]),time_offset)

			elif event == ui.EVENTS.WINDOW_CLOSE :
				controller.addInput(Event(raise_name, port, [source]),time_offset)

			else :
				raise Exception('Unsupported event');
	
		if event == ui.EVENTS.WINDOW_CLOSE :
			source.protocol(event, __handle_event)

		elif issubclass(drawing.ui_element_wrapper,source.__class__) :
			source.canvas_wrapper.element.tag_bind(source.element_id, event, __handle_event)

		else :
			source.bind(event, __handle_event)


	@staticmethod
	def close_window(_window):
		_window.destroy()


	@staticmethod
	def log(value):
		print(value)


	@staticmethod
	def new_window(width,height):
		_window = tk.Toplevel(ui.window)
		_window.geometry(str(width)+"x"+str(height)+"+300+300")
		return _window


	@staticmethod
	def println(value,target):
		raise Exception('Not implemented yet');


	@staticmethod
	def wrap_element(element):
		return utils._bunch(element=element)