#!/usr/bin/python3
# -*- coding: utf-8 -*-
#
# module BitStream
#
#    Copyright (C) 2019  AleaJactaEst
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

#import logging
#from ctypes import *
#import sys
#import inspect
#import copy
#import struct

LOGGER='CPropertyDecoder'

class CEntityEntry():
    def __init__(self):
        self.Sheet = 0
        self.AssociationBits = 0
        self.EntryUsed = False
        self.PosIsRelative = False
        self.PosIsInterior = False
        
class CPropertyDecoder():
    def __init__(self):
        # khanat-opennel-code/code/ryzom/client/src/network_connection.cpp:2937 _PropertyDecoder.init (256);
        self.Entities = [CEntityEntry() for _ in range(0, 256)]
        #for i in range(0, 256):
        #    self.Entities[i] = CEntityEntry()
        self._RefPosX = 0
        self._RefPosY = 0
        self._RefBitsX = 0
        self._RefBitsY = 0
        self._RefBitsZ = 0
            
    def GetAssociationBits(self,  slot):
        return self.Entities[slot].AssociationBits
        
    def clear(self):
        for i in range(0, 256):
            self.Entities[i] = CEntityEntry()

    def associationBitsHaveChanged(self,  slot,  _associationBits):
        res = _associationBits != self.GetAssociationBits(slot)
        self.Entities[slot].AssociationBits = _associationBits
        return res
        
    def addEntity(self,  entity,  sheet):
        self.Entities[entity].EntryUsed = True
        self.Entities[entity].Sheet = sheet

    def removeEntity(self,  entity):
        if self.Entities[entity].EntryUsed:
            self.Entities[entity].EntryUsed = False
            self.Entities[entity].Sheet = 0xffff

    def isUsed(self,  slot):
        return self.Entities[slot].EntryUsed

    def getSheet(self, slot):
        return self.Entities[slot].Sheet
        
    def decodeAbsPos2D(self,  x16,  y16):
        x = self._RefPosX + (x16 - self._RefBitsX) << 4
        y = self._RefPosY + (y16 - self._RefBitsY) << 4
        
        return (x,  y)
        
    def receive(self,  actionPosition):
        # if (action->Code == ACTION_POSITION_CODE) # normally is always this type
        if actionPosition.IsRelative:
            # Relative position (entity in a ferry...)
            actionPosition.Position[0] =  actionPosition.Position16[0]
            actionPosition.Position[1] =  actionPosition.Position16[1]
            actionPosition.Position[2] =  actionPosition.Position16[2]
            self.Entities[actionPosition.Slot].PosIsRelative = True
            self.Entities[actionPosition.Slot].PosIsInterior = False
        else:
            # Absolute position
            # actionPosition.Position[0] ,  actionPosition.Position[1] = self.decodeAbsPos2D(actionPosition.Position16[0],  actionPosition.Position16[1])
            actionPosition.Position[0]  = self._RefPosX + (actionPosition.Position16[0] - self._RefBitsX) << 4
            actionPosition.Position[1]  = self._RefPosY + (actionPosition.Position16[1] - self._RefBitsY) << 4
            actionPosition.Position[2]  = actionPosition.Position16[2]  << 4
            if actionPosition.Interior:
                actionPosition.Position[2] += 2
            self.Entities[actionPosition.Slot].PosIsRelative = False
            self.Entities[actionPosition.Slot].PosIsInterior = actionPosition.Interior