# coding: utf-8

import fife
import widgets
import fonts
from exceptions import *
from traceback import print_exc

class Manager(object):
	manager = None

	def __init__(self, engine, debug = False):
		super(Manager,self).__init__()
		self.engine = engine
		self.debug = debug

		if not self.engine.getEventManager():
			raise InitializationError("No event manager installed.")
		if not self.engine.getGuiManager():
			raise InitializationError("No GUI manager installed.")

		self.guimanager = engine.getGuiManager()
		self.fonts = {}
		#glyphs = ' abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.,!?-+/:();%`\'*#=[]"'
		self.fonts['default'] = self.engine.getDefaultFont()

		self.styles = {}
		self.addStyle('default',DEFAULT_STYLE)

                Manager.manager = self

		# Setup synchronous dialogs
		self.mainLoop = None
		self.breakFromMainLoop = None
		self.can_execute = False

	def setupModalExecution(self,mainLoop,breakFromMainLoop):
		"""
		Setup synchronous execution of dialogs.
		"""
		self.mainLoop = mainLoop
		self.breakFromMainLoop = breakFromMainLoop
		self.can_execute = True

	def show(self,widget):
		"""
		Shows a widget on screen. Used by L{Widget.show} - do not use directly.
		"""
		if widget.position_technique == "automatic":
			w,h = self.engine.getSettings().getScreenWidth(), self.engine.getSettings().getScreenHeight()
			widget.position = (w-widget.width)/2,(h-widget.height)/2
		self.guimanager.add( widget.real_widget )

	def hide(self,widget):
		"""
		Hides a widget again. Used by L{Widget.hide} - do not use directly.
		"""
		self.guimanager.remove( widget.real_widget )

	def getFont(self,name):
		"""
		Returns a GuiFont identified by its name.

		@param name: A string identifier from the font definitions in pychans config files.
		"""
		font = self.fonts.get(name)

		# For the default font directly return it,
		# otherwise the GuiFont is in the font attribute.
		return getattr(font,"font",font)

	def addFont(self,font):
		"""
		Add a font to the font registry. It's not necessary to call this directly.
		But it expects a L{Font} instance and throws an L{InitializationError}
		otherwise.

		@param font: A L{Font} instance.
		"""
		if not isinstance(font,fonts.Font):
			raise InitializationError("PyChan Manager expected a fonts.Font instance, not %s." % repr(font))
		self.fonts[font.name] = font

	def addStyle(self,name,style):
		style = self._remapStyleKeys(style)

		for k,v in self.styles.get('default',{}).items():
			style[k] = style.get(k,v)
		self.styles[name] = style

	def stylize(self,widget, style, **kwargs):
		style = self.styles[style]
		for k,v in style.get('default',{}).items():
			v = kwargs.get(k,v)
			setattr(widget,k,v)

		cls = widget.__class__
		for applicable,specstyle in style.items():
			if not isinstance(applicable,tuple):
				applicable = (applicable,)
			if cls in applicable:
				for k,v in specstyle.items():
					v = kwargs.get(k,v)
					setattr(widget,k,v)

	def _remapStyleKeys(self,style):
		# Remap class names, create copy:
		def _toClass(class_):
			if class_ == "default":
				return class_

			if type(class_) == type(widgets.Widget) and issubclass(class_,widgets.Widget):
				return class_
			if not widgets.WIDGETS.has_key(str(class_)):
				raise InitializationError("Can't resolve %s to a widget class." % repr(class_))
			return widgets.WIDGETS[str(class_)]

		style_copy = {}
		for k,v in style.items():
			if isinstance(k,tuple):
				new_k = tuple(map(_toClass,k))
			else:
				new_k = _toClass(k)
			style_copy[new_k] = v
		return style_copy

	def loadImage(self,filename):
		index = self.engine.imagePool.addResourceFromFile(filename)
		return fife.GuiImage(index,self.engine.imagePool)

# Default Widget style.

DEFAULT_STYLE = {
	'default' : {
		'border_size': 1,
		'margins': (0,0),
		'base_color' : fife.Color(0,0,100),
		'foreground_color' : fife.Color(255,255,255),
		'background_color' : fife.Color(0,0,0),
	},
	'Button' : {
		'border_size': 0,
		'margins' : (10,5),
	},
	('CheckBox','RadioButton') : {
		'border_size': 0,
	},
	'TextBox' : {
		'border_size' : 0,
	},
	'Label' : {
		'border_size': 0,
	},
	'ListBox' : {
		'border_size': 0,
	},
	'Window' : {
		'border_size': 1,
		'margins': (5,5),
	},
	('Container','HBox','VBox') : {
		'border_size': 0,
		'opaque' : False
	},
	'Icon' : {
		'border_size' : 0
	},
	'Slider' : {
		'border_size' : 0
	}
}