#!/usr/bin/env python

from ..VDM import VDM
import os

# get screen resolution
import tkinter 
root = tkinter.Tk()
width = root.winfo_screenwidth()
height = root.winfo_screenheight()

from kivy.config import Config
Config.set('graphics','fullscreen', 0)
Config.set('graphics','resizable',0)
Config.set('graphics','position', 'custom')
Config.set('graphics','width', 600)
Config.set('graphics','height', 150)

# align bottom and 50 px from right
Config.set('graphics','left', width-Config.getint('graphics', 'width')-45)
Config.set('graphics','top', height-Config.getint('graphics', 'height')-17)

from kivy.core.window import Window

import kivy
from kivy.app import App
from kivy.properties import *
from kivy.uix.gridlayout import GridLayout
from kivy.lang import Builder

Builder.load_string('''
<guiApp>:
    Button:
        id: prev
        size_hint_x: None
        width: 100
        text: '<<'
        on_press: root._prevAction()
    Label:
        id: content
        text_size: 300, None
        text: root.currentVdm
    Button:
        id: next
        size_hint_x: None
        width: 100
        text: '>>'
        on_press: root._nextAction()
''')


class guiApp(GridLayout):
	""" display all vdm into kivy interface """
	
	# https://kivy.org/docs/api-kivy.properties.html#kivy.properties.ListProperty
	# NumericProperty, StringProperty, ListProperty, ObjectProperty, 
	# BooleanProperty, BoundedNumericProperty, OptionProperty, ReferenceListProperty, AliasProperty, DictProperty
	
	indice = NumericProperty(0)
	vdm = ListProperty([])
	currentVdm = StringProperty('no VDM load for the moment')

	def __init__(self, **kwargs):
		super(guiApp, self).__init__(**kwargs)

		self._keyboard = Window.request_keyboard(self._keyboard_closed, self)
		self._keyboard.bind(on_key_down = self._on_keyboard_down)

		self.v = VDM()
		self.vdm = ['toto', 'titi', 'tutu']#self.v.get()
		self.render()

	def _nextAction(self):
		if self.indice == len(self.vdm)-1:
			self.vdm = self.v.get()
			self.indice = 0
		else:
			self.indice += 1
		self.render()

	def _prevAction(self):
		if self.indice > 0:
			self.indice -= 1
		self.render()

	def _keyboard_closed(self):
		self._keyboard.unbind(on_key_down = self._on_keyboard_down)
		self._keyboard = None

	def _on_keyboard_down(self, *args):
		if args[1][1] == 'right':
			self._nextAction()

		elif args[1][1] == 'left':
			self._prevAction()

	def render(self):
		#print(self.indice)
		#print(self.vdm[self.indice])

		self.currentVdm = self.vdm[self.indice]
                #self.ids.content.text = self.vdm[self.indice]

class kivyApp(App):
	def build(self):
		return guiApp(cols=3, pos=(0,0))