#!/usr/bin/env python

# -*- coding: utf-8 -*-

# ####################################################################
#  Copyright (C) 2005-2010 by the FIFE team
#  http://www.fifengine.net
#  This file is part of FIFE.
#
#  FIFE is free software; you can redistribute it and/or
#  modify it under the terms of the GNU Lesser General Public
#  License as published by the Free Software Foundation; either
#  version 2.1 of the License, or (at your option) any later version.
#
#  This library 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
#  Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public
#  License along with this library; if not, write to the
#  Free Software Foundation, Inc.,
#  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
# ####################################################################

import sys, os, re, math, random, shutil, glob, uuid

from fife import fife

from fife.extensions.soundmanager import SoundManager
from fife.extensions.serializers.xml_loader_tools import loadImportFile

from scripts.scene import Scene
from scripts.guicontroller import GUIController
from scripts.actors.baseactor import TalkAction, AttackAction, PickUpItemAction, EnterPortalAction
from scripts.objects.baseobject import GameObjectTypes
from scripts.misc.exceptions import ObjectNotFoundError, ObjectAlreadyInSceneError
from scripts.quests.questmanager import QuestManager


class KeyState(object):
	"""
	Holds the current state of the keys on the keyboard (down or up).
	False = down, True = up.
	"""
	def __init__(self):
		self._keystate = { }
		
	def updateKey(self, key, state):
		self._keystate[key] = state
		
	def checkKey(self, key):
		if key in self._keystate:
			return self._keystate[key]
		else:
			return False
			
	def reset(self):
		"""
		Empties the keystate dictionary (assumes all keys are False)
		"""
		self._keystate.clear()

class GameListener(fife.IKeyListener, fife.IMouseListener):
	"""
	Main game listener.  Listens for Mouse and Keyboard events.
	
	This class also has the ability to attach and detach itself from
	the event manager in cases where you do not want input processed (i.e. when
	the main menu is visible).  It is NOT attached by default.
	"""
	def __init__(self, gamecontroller):
		self._engine = gamecontroller.engine
		self._gamecontroller = gamecontroller
		self._settings = gamecontroller.settings
		self._eventmanager = self._engine.getEventManager()
		
		fife.IMouseListener.__init__(self)
		fife.IKeyListener.__init__(self)
		
		self._attached = False
		
		self._lastmousepos = (0.0,0.0)
		
	def attach(self):
		"""
		Attaches to the event manager.
		"""
		if not self._attached:
			self._gamecontroller.keystate.reset()
			self._eventmanager.addMouseListenerFront(self)
			self._eventmanager.addKeyListenerFront(self)
			self._attached = True
	
	def detach(self):
		"""
		Detaches from the event manager.
		"""
		if self._attached:
			self._eventmanager.removeMouseListener(self)
			self._eventmanager.removeKeyListener(self)
			self._attached = False
		
	def mousePressed(self, event):
		#mouse press was consumed by some pychan widget
		if event.isConsumedByWidgets():
			return

		clickpoint = fife.ScreenPoint(event.getX(), event.getY())

		if (event.getButton() == fife.MouseEvent.LEFT):
			self._lastmousepos = (clickpoint.x, clickpoint.y)
			
			#cancel last action
			self._gamecontroller.scene.player.nextaction = None
			
			self._gamecontroller.scene.player.walk( self._gamecontroller.scene.getLocationAt(clickpoint) )
			
			actor_instances = self._gamecontroller.scene.getInstancesAt(clickpoint, self._gamecontroller.scene.actorlayer)
			item_instances = self._gamecontroller.scene.getInstancesAt(clickpoint, self._gamecontroller.scene.itemlayer)
			
			if actor_instances:
				actor_instance = None
				for actor in actor_instances:
					if actor.getId() == "player":
						continue
					else:
						actor_instance = actor
						break
				
				if actor_instance:
					obj = self._gamecontroller.scene.objectlist[actor_instance.getId()]
					if obj.type == GameObjectTypes["QUESTGIVER"]:
						action = TalkAction(self._gamecontroller.scene.player, obj)
						self._gamecontroller.scene.player.nextaction = action
					elif obj.type == GameObjectTypes["ENEMY"]:
						action = AttackAction(self._gamecontroller.scene.player, obj)
						self._gamecontroller.scene.player.nextaction = action
					else:
						action = TalkAction(self._gamecontroller.scene.player, obj)
						self._gamecontroller.scene.player.nextaction = action
			
			if item_instances:
				obj = self._gamecontroller.scene.objectlist[item_instances[0].getId()]
				if obj.type == GameObjectTypes["ITEM"]:
					action = PickUpItemAction(self._gamecontroller.scene.player, obj)
					self._gamecontroller.scene.player.nextaction = action
				elif obj.type == GameObjectTypes["PORTAL"]:
					action = EnterPortalAction(self._gamecontroller.scene.player, obj)
					self._gamecontroller.scene.player.nextaction = action
					
		if (event.getButton() == fife.MouseEvent.RIGHT):
			instances = self._gamecontroller.scene.getInstancesAt(clickpoint, self._gamecontroller.scene.actorlayer)
			if instances:
				self._gamecontroller.logger.log_debug("Selected instance on actor layer: " + instances[0].getId())

				
	def mouseReleased(self, event):
		pass

	def mouseMoved(self, event):
		renderer = self._gamecontroller.instancerenderer
		if renderer:
			renderer.removeAllOutlines()
		else:
			return

		pt = fife.ScreenPoint(event.getX(), event.getY())
		actor_instances = self._gamecontroller.scene.getInstancesAt(pt, self._gamecontroller.scene.actorlayer)
		item_instances = self._gamecontroller.scene.getInstancesAt(pt, self._gamecontroller.scene.itemlayer)
		for i in actor_instances:
			if i.getId() != "player":
				renderer.addOutlined(i, 173, 255, 47, 2)
			
		for j in item_instances:
			renderer.addOutlined(j, 255, 173, 47, 2)

	def mouseEntered(self, event):
		pass
		
	def mouseExited(self, event):
		pass
		
	def mouseClicked(self, event):
		pass
		
	def mouseWheelMovedUp(self, event):
		pass	
		
	def mouseWheelMovedDown(self, event):
		pass
		
	def mouseDragged(self, event):
		if event.isConsumedByWidgets():
			return

		clickpoint = fife.ScreenPoint(event.getX(), event.getY())
		if (event.getButton() == fife.MouseEvent.LEFT):
			if clickpoint.x > self._lastmousepos[0] + 5 or  clickpoint.x < self._lastmousepos[0] - 5 or clickpoint.y > self._lastmousepos[1] + 5 or clickpoint.y < self._lastmousepos[1] - 5:
				self._gamecontroller.scene.player.walk( self._gamecontroller.scene.getLocationAt(clickpoint) )

			self._lastmousepos = (clickpoint.x, clickpoint.y)
		
	def keyPressed(self, event):
		keyval = event.getKey().getValue()
		keystr = event.getKey().getAsString().lower()
		if keyval == fife.Key.ESCAPE:
			self.detach()
			self._gamecontroller.guicontroller.showMainMenu()
			event.consume()
			
		self._gamecontroller.keystate.updateKey(keyval, True)
		
	def keyReleased(self, event):
		keyval = event.getKey().getValue()
		keystr = event.getKey().getAsString().lower()
		
		self._gamecontroller.keystate.updateKey(keyval, False)
		
class GameController(object):
	"""
	The main game class.  
	
	This handles all game related code including setting up the scene, displaying user
	interfaces, managing sound, etc etc.
	"""
	def __init__(self, application, engine, settings):
		self._application = application
		self._engine = engine
		self._settings = settings
		
		self._soundmanager = SoundManager(self._engine)		
		
		self._keystate = KeyState()
		
		self._guicontroller = GUIController(self)
		
		self._listener = GameListener(self)
		
		self._guicontroller.showMainMenu()
		
		self._questmanager = QuestManager(self)
		
		self._scene = None
		self._instancerenderer = None
		self._floatingtextrenderer = None
		
		self._switchmaprequested = False
		self._newmap = None
		
	def onConsoleCommand(self, command):
		"""
		Parses game related console commands.
		"""
		
		result = ""
		
		args = command.split(" ")
		cmd = []
		for arg in args:
			arg = arg.strip()
			if arg != "":
				cmd.append(arg)
		
		if cmd[0] == "spawn":
			result = "Usage: spawn [object template] [posx] [posy] "
			if len(cmd) != 4:
				return result
			else:
				try:
					id = str(uuid.uuid1())
					valdict = { "posx" : float(cmd[2]), "posy" : float(cmd[3]) }
					obj = self._scene.loadObject(cmd[1], id, valdict)
				except ObjectNotFoundError, e:
					result = "Error: Cannot load [" + cmd[1] + "].  It could not be found!"
					obj = None
					
				if obj:
					try:
						self._scene.addObjectToScene(obj)
						obj.position = (float(cmd[2]), float(cmd[3]))
						result = "--OK--"
					except ObjectAlreadyInSceneError, e:
						result = "Error: [" + cmd[1] + "] is already on the scene."
						
		elif cmd[0] == "move":
			result = "Usage: move [object id] [posx] [posy]"
			if len(cmd) != 4:
				return result
			else:
				obj = self._scene.getObject(cmd[1])
				if obj:
					obj.position = (float(cmd[2]), float(cmd[3]))
					result = "--OK--"
				else:
					result = "Error: [" + cmd[1] + "] does not exist on the scene."
					
		elif cmd[0] == "loadmap":
			result = "Usage: loadmap [map name]"
			
			
		return result
		
	def newGame(self):
		"""
		Removes any save games and starts a new game.
		"""
		
		self._guicontroller.hideMainMenu()
		
		for filename in glob.glob(os.path.join("saves" , "*.xml")):
			os.remove(filename)
		
		
		self._questmanager.reset()
		self._questmanager.deserialize()
		
		mapname = self._settings.get("RPG", "TownMapFile", "town")
		self.loadMap(mapname)
		
		
	def loadMap(self, mapname):
		"""
		Creates the scene for the map and attaches the listener.		
		"""
	
		if self._listener:
			self._listener.detach()
		
		self._keystate.reset()
		
		if self._scene:
			self._scene.destroyScene()
			self._scene = None
		
		self._scene = Scene(self)
		
		self._scene.createScene(mapname)
		
		self._instancerenderer = fife.InstanceRenderer.getInstance(self._scene.cameras[self._settings.get("RPG", "DefaultCameraName", "camera1")])
		self._floatingtextrenderer = fife.FloatingTextRenderer.getInstance(self._scene.cameras[self._settings.get("RPG", "DefaultCameraName", "camera1")])
		self._floatingtextrenderer.addActiveLayer(self._scene.actorlayer)
		self._floatingtextrenderer.setBackground(255, 100, 100, 165) 
		self._floatingtextrenderer.setBorder(255, 50, 50)
		self._floatingtextrenderer.setEnabled(True)
		
		if self._listener:
			self._listener.attach()

	def switchMap(self, newmapname):
		"""
		Queues a map switch for next frame.  This must be done next frame to ensure
		all events pertaining to the current frame have finished being processed.
		"""
		self._switchmaprequested = True
		self._newmap = newmapname
		
		#save before switching scenes
		self._scene.serialize()
	
	def endGame(self):
		"""
		Saves the game state and destroys the scene.
		"""
		if self._scene:
			self._scene.serialize()
			
			self._listener.detach()
			self._scene.destroyScene()
			self._questmanager.reset()
			
			self._scene = None
			self._instancerenderer = None
			self._floatingtextrenderer = None
		
	def quit(self):
		self.endGame()
		self._application.requestQuit()

	def pump(self):
		if self._switchmaprequested:
			self.loadMap(self._newmap)
			self._newmap = None
			self._switchmaprequested = False
	
		if self._scene:
			self._scene.updateScene()
		
		
	def _getGUIController(self):
		return self._guicontroller
		
	def _getQuestManager(self):
			return self._questmanager
	
	def _getEngine(self):
		return self._engine
		
	def _getSettings(self):
		return self._settings
		
	def _getScene(self):
		return self._scene
	
	def _getKeyState(self):
		return self._keystate
	
	def _getInstanceRenderer(self):
		return self._instancerenderer
		
	def _getLogManager(self):
		return self._application.logger
	
	guicontroller = property(_getGUIController) 
	questmanager = property(_getQuestManager)
	engine = property(_getEngine)
	settings = property(_getSettings)
	scene = property(_getScene)
	keystate = property(_getKeyState)
	instancerenderer = property(_getInstanceRenderer)
	logger = property(_getLogManager)