import bge # Bibliothèque Blender Game Engine (UPBGE)
import os
import sys
import importlib
import subprocess # Multiprocessus
import time

###############################################################################
# twin_plot.py
# @title: Visualisation des données
# @project: Blender-EduTech
# @lang: fr
# @authors: Philippe Roy <philippe.roy@ac-grenoble.fr>
# @copyright: Copyright (C) 2023 Philippe Roy
# @license: GNU GPL
###############################################################################

# UPBGE scene
scene = bge.logic.getCurrentScene()

# Récupérer la configuration du graphique
system=importlib.import_module(scene.objects['Doc']['system']) # Système
plot_config = system.get_public_vars()

###############################################################################
# Accès aux variables publiques du système
###############################################################################

def get(data):
    if data in plot_config:
        return scene.objects[plot_config[data][0][0]][plot_config[data][0][1]]
    else:
        print ("Erreur sur l'accès aux variables par get("+data+"), la variable '"+data+"' absente du système.")

###############################################################################
# Création du graphique
###############################################################################

def plot(data):
    # subprocess.run([sys.executable, os.path.join(os.getcwd(), "twin_plot.py")], , stdin=subprocess.PIPE) # Process bloquant

    # Terminer le processus précédent
    if scene.objects['System']['plot_proc'] is not None:
        if scene.objects['System']['plot_proc'].poll()==None:
            scene.objects['System']['plot_proc'].terminate()
    scene.objects['System']['plot_draw'] = True
    scene.objects['System']['plot_time'] = 0

    # Configuration des données
    scene.objects['System']['plot_data'] =[]
    for obj in data:
        scene.objects['System']['plot_data'].append(plot_config[obj][0][0])

    # Démarrer le processus
    scene.objects['System']['plot_proc'] = subprocess.Popen([sys.executable, os.path.join(os.getcwd(), "twin_plot_qt.py")], stdin=subprocess.PIPE, encoding = 'utf8', universal_newlines=True)
    # # scene.objects['System']['plot_proc'] = subprocess.Popen([sys.executable, os.path.join(os.getcwd(), "twin_plot_qt.py")], stdin=subprocess.PIPE, stdout=subprocess.PIPE, encoding = 'utf8')
    # # stout = scene.objects['System']['plot_proc'].communicate() # FIXME : attente du message retour pour lancer l'acquisition
    # # print("Blender stout : ", stout)
    scene.objects['System']['plot']=True

###############################################################################
# Mise à jour du graphique
###############################################################################

def truncate(n, decimals=0):
    multiplier = 10**decimals
    return int(n* multiplier)/multiplier

def plot_maj(cont):
    if cont.sensors['Plot'].positive :

        # Affichage du graphique
        if scene.objects['System']['plot_draw']:
            if scene.objects['System']['plot_time'] != truncate(scene.objects['System']['time'], 0) or True:

                # Préparation du message
                # FIXME : ajouter les valeurs réelles et valeurs numériques ('activated_real')
                scene.objects['System']['plot_time'] = truncate(scene.objects['System']['time'], 0)
                # msg=str(round(scene.objects['System']['plot_time'], 1))
                # msg=format(scene.objects['System']['plot_time'],".2f")
                msg=format(scene.objects['System']['plot_time'],".2f")
                for obj in scene.objects['System']['plot_data']:
                    if scene.objects[obj]['activated']:
                        msg = msg+",1"
                    else:
                        msg = msg+",0"
                msg = msg+"\n"

                # Envoi (Pipe)
                if scene.objects['System']['plot_proc'].poll()==None:
                    # # scene.objects['System']['plot_proc'].communicate(input=time_send.encode())[0] # Communication bloquante
                    # scene.objects['System']['plot_proc'].communicate(input=msg.encode())[0] # Communication bloquante
                    scene.objects['System']['plot_proc'].communicate(input=msg.encode()) # Communication bloquante
                    # scene.objects['System']['plot_proc'].stdin.write(msg)
                    print ("twin : ", msg)
                else:
                    # Arrêt
                    print ("Stop")
                    scene.objects['System']['plot']=False
                    scene.objects['System']['plot_draw'] =False
                    scene.objects['System']['plot_proc'].terminate()
            
            # Arrêt de l'affichage du graphique
            if scene.objects['System']['plot_proc'].poll()==None:
                pass
            else:
                print ("Stop")
                scene.objects['System']['plot']=False
                scene.objects['System']['plot_draw'] =False
                scene.objects['System']['plot_proc'].terminate()