# -*-coding:Utf-8 -*

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"""Fichier contenant la fonction creer_familier."""

from primaires.scripting.fonction import Fonction
from primaires.scripting.instruction import ErreurExecution

class ClasseFonction(Fonction):

    """Crée un PNJ à partir du prototype précisé."""

    @classmethod
    def init_types(cls):
        cls.ajouter_types(cls.creer_familier, "str", "Personnage")
        cls.ajouter_types(cls.creer_familier_PNJ, "Personnage", "Personnage")

    @staticmethod
    def creer_familier(prototype, maitre):
        """Crée un familier sur le prototype précisé.

        Paramètres à préciser :

          * prototype : la clé du prototype (celle de la fiche de familier)
          * maitre : le personnage qui deviendra le maître du familier

        Cette fonction retourne le PNJ créé, comme 'creer_PNJ'.
        Prenez garde de toujours stocker les PNJs créés dans des variables
        afin de ne pas créer de PNJs fantômes.

        """
        if not prototype in importeur.pnj.prototypes:
            raise ErreurExecution("prototype {} introuvable".format(prototype))
        if not prototype in importeur.familier.fiches:
            raise ErreurExecution("fiche de familier {} introuvable".format(
                    prototype))
        prototype = importeur.pnj.prototypes[prototype]
        if prototype.squelette is None:
            raise ErreurExecution("prototype {} sans squelette".format(
                    prototype))
        pnj = importeur.pnj.creer_PNJ(prototype)
        familier = importeur.familier.creer_familier(pnj)
        familier.maitre = maitre
        familier.trouver_nom()
        return pnj

    @staticmethod
    def creer_familier_PNJ(pnj, maitre):
        """Crée un familier sur le PNJ existant.

        Paramètres à préciser :

          * pnj : le PNJ existant
          * maitre : le personnage qui deviendra le maître du familier

        Cette fonction travaille sur un PNJ déjà existant. Le
        PNJ doit avoir une fiche de familier valide (et ne pas
        déjà être un familier). Le PNJ est retourné.

        """
        cle = getattr(pnj, "cle", None)
        identifiant = getattr(pnj, "identifiant", None)
        if cle not in importeur.familier.fiches:
            raise ErreurExecution("aucune fiche de famillier associée " \
                    "au personnage {}".format(repr(pnj)))

        if identifiant in importeur.familier.familiers:
            raise ErreurExecution("le PNJ {} est déjà un familier".format(
                    repr(pnj)))

        familier = importeur.familier.creer_familier(pnj)
        familier.maitre = maitre
        familier.trouver_nom()
        return pnj
