"""SC Controller - Action Editor - Axis Component

Assigns emulated axis to trigger
"""
from scc.tools import _

from gi.repository import Gdk, GdkX11, GLib
from ctypes import cast, POINTER
from scc.actions import Action, NoAction, AxisAction, MouseAction
from scc.actions import XYAction, RelXYAction
from scc.actions import MultiAction, RelWinAreaAction, ButtonAction
from scc.actions import AreaAction, WinAreaAction, RelAreaAction
from scc.modifiers import BallModifier, CircularModifier
from scc.uinput import Keys, Axes, Rels
from scc.constants import SCButtons
from scc.lib import xwrappers as X
from scc.osd.timermanager import TimerManager
from scc.osd.area import Area
from scc.gui.parser import GuiActionParser, InvalidAction
from scc.gui.simple_chooser import SimpleChooser
from scc.gui.controller_widget import STICKS
from scc.gui.ae import AEComponent

import os, logging, math
log = logging.getLogger("AE.AxisAction")

__all__ = [ 'AxisActionComponent' ]


class AxisActionComponent(AEComponent, TimerManager):
	GLADE = "ae/axis_action.glade"
	NAME = "axis_action"
	CTXS = Action.AC_STICK | Action.AC_PAD
	PRIORITY = 3

	def __init__(self, app, editor):
		AEComponent.__init__(self, app, editor)
		TimerManager.__init__(self)
		self._recursing = False
		self.relative_area = False
		self.osd_area_instance = None
		self.on_wayland = False
		self.circular_axis = MouseAction(Rels.REL_WHEEL)
		self.circular_buttons = [ None, None ]
		self.button = None
		self.parser = GuiActionParser()


	def load(self):
		if self.loaded : return
		AEComponent.load(self)
		cbAreaType = self.builder.get_object("cbAreaType")
		cbAreaType.set_row_separator_func( lambda model, iter : model.get_value(iter, 0) == "-" )
		self.on_wayland = "WAYLAND_DISPLAY" in os.environ or not isinstance(Gdk.Display.get_default(), GdkX11.X11Display)
		if self.on_wayland:
			self.builder.get_object("lblArea").set_text(_("Note: Mouse Region option is not available with Wayland-based display server"))
			self.builder.get_object("grArea").set_sensitive(False)

		# Remove options that are not applicable to currently editted input
		if self.editor.get_id() in STICKS:
			# Remove "Mouse Region", "Mouse" and "Mouse (Emulate Stick)" options
			# when editing stick bindings
			cb = self.builder.get_object("cbAxisOutput")
			for row in cb.get_model():
				if row[2] in ("wheel_pad", "area", "mouse", "mouse_pad"):
					cb.get_model().remove(row.iter)
		else:
			# Remove "Mouse" option when editing pads
			# (it's effectivelly same as Trackpad)
			cb = self.builder.get_object("cbAxisOutput")
			for row in cb.get_model():
				if row[2] in ("wheel_stick", "mouse_stick"):
					cb.get_model().remove(row.iter)


	def hidden(self):
		self.update_osd_area(None)


	def set_action(self, mode, action):
		if self.handles(mode, action):
			cb = self.builder.get_object("cbAxisOutput")
			if isinstance(action, AreaAction):
				self.load_area_action(action)
				self.set_cb(cb, "area", 2)
				self.update_osd_area(action)
				return
			self.update_osd_area(None)
			if isinstance(action, MouseAction):
				self.load_mouse_action(action)
			elif isinstance(action, CircularModifier):
				self.load_circular_action(action)
			elif isinstance(action, ButtonAction):
				self.load_button_action(action)
			elif isinstance(action, XYAction):
				if self.editor.friction > 0:
					self.load_mouse_action(action)
				else:
					p = [ None, None ]
					for x in (0, 1):
						if len(action.actions[0].strip().parameters) >= x:
							if len(action.actions[x].strip().parameters) > 0:
								p[x] = action.actions[x].strip().parameters[0]
					if p[0] == Axes.ABS_X and p[1] == Axes.ABS_Y:
						self.set_cb(cb, "lstick", 2)
					elif p[0] == Axes.ABS_RX and p[1] == Axes.ABS_RY:
						if isinstance(action, RelXYAction):
							self.set_cb(cb, "rstick_rel", 2)
						else:
							self.set_cb(cb, "rstick", 2)
					elif p[0] == Rels.REL_HWHEEL and p[1] == Rels.REL_WHEEL:
						self.set_cb(cb, "wheel_pad", 2)
						self.set_cb(cb, "wheel_stick", 2)
			else:
				self.set_cb(cb, "none", 2)


	def update_osd_area(self, action):
		""" Updates preview area displayed on screen """
		if action:
			if self.osd_area_instance is None:
				if self.on_wayland:
					# Cannot display preview with non-X11 backends
					return
				self.osd_area_instance = Area()
				self.osd_area_instance.show()
			action.update_osd_area(self.osd_area_instance, FakeMapper(self.editor))
			self.timer("area", 0.5, self.update_osd_area, action)
		elif self.osd_area_instance:
			self.osd_area_instance.quit()
			self.osd_area_instance = None
			self.cancel_timer("area")


	def load_circular_action(self, action):
		cbAxisOutput = self.builder.get_object("cbAxisOutput")
		btCircularAxis = self.builder.get_object("btCircularAxis")
		btCircularButton0 = self.builder.get_object("btCircularButton0")
		btCircularButton1 = self.builder.get_object("btCircularButton1")

		# Turn action into list of subactions (even if it's just single action)
		if isinstance(action.action, MultiAction):
			actions = action.action.actions
		else:
			actions = [ action.action ]

		# Parse that list
		self.circular_axis, self.circular_buttons = NoAction(), [ None, None ]
		for action in actions:
			if isinstance(action, ButtonAction):
				self.circular_buttons = [ action.button, action.button2 ]
			else:
				self.circular_axis = action

		# Set labels
		b0, b1 = self.circular_buttons
		btCircularButton0.set_label(ButtonAction.describe_button(b0))
		btCircularButton1.set_label(ButtonAction.describe_button(b1))
		btCircularAxis.set_label(self.circular_axis.describe(Action.AC_PAD))

		self.set_cb(cbAxisOutput, "circular", 2)


	def load_button_action(self, action):
		self.button = action
		cbAxisOutput = self.builder.get_object("cbAxisOutput")
		btSingleButton = self.builder.get_object("btSingleButton")
		btSingleButton.set_label(self.button.describe(Action.AC_PAD))
		self.set_cb(cbAxisOutput, "button", 2)


	def load_mouse_action(self, action):
		cbMouseOutput = self.builder.get_object("cbMouseOutput")
		cbAxisOutput = self.builder.get_object("cbAxisOutput")
		self._recursing = True
		if isinstance(action, MouseAction):
			self.set_cb(cbMouseOutput, "mouse", 1)
			self.set_cb(cbAxisOutput, "mouse", 2)
		elif isinstance(action, XYAction):
			if isinstance(action.x, AxisAction):
				if action.x.parameters[0] == Axes.ABS_X:
					self.set_cb(cbMouseOutput, "left", 1)
				else:
					self.set_cb(cbMouseOutput, "right", 1)
				self.set_cb(cbAxisOutput, "mouse", 2)
			elif isinstance(action.x, MouseAction):
				if self.editor.get_id() in STICKS:
					self.set_cb(cbAxisOutput, "wheel_stick", 2)
				else:
					self.set_cb(cbAxisOutput, "wheel_pad", 2)
		self._recursing = False


	def load_area_action(self, action):
		"""
		Load AreaAction values into UI.
		"""
		cbAreaType = self.builder.get_object("cbAreaType")

		x1, y1, x2, y2 = action.coords
		self.relative_area = False
		if isinstance(action, RelAreaAction):
			key = "screensize"
			self.relative_area = True
			x1, y1, x2, y2 = x1 * 100.0, y1 * 100.0, x2 * 100.0, y2 * 100.0
		elif isinstance(action, RelWinAreaAction):
			key = "windowsize"
			self.relative_area = True
			x1, y1, x2, y2 = x1 * 100.0, y1 * 100.0, x2 * 100.0, y2 * 100.0
		else:
			t1 = "1" if x1 < 0 and x2 < 0 else "0"
			t2 = "1" if y1 < 0 and y2 < 0 else "0"
			x1, y1, x2, y2 = abs(x1), abs(y1), abs(x2), abs(y2)
			if x2 < x1 : x1, x2 = x2, x1
			if y2 < y1 : y1, y2 = y2, y1
			if isinstance(action, WinAreaAction):
				key = "window-%s%s" % (t1, t2)
			else:
				key = "screen-%s%s" % (t1, t2)

		self._recursing = True
		self.builder.get_object("sbAreaX1").set_value(x1)
		self.builder.get_object("sbAreaY1").set_value(y1)
		self.builder.get_object("sbAreaX2").set_value(x2)
		self.builder.get_object("sbAreaY2").set_value(y2)
		self.builder.get_object("cbAreaOSDEnabled").set_active(self.editor.osd)
		self.builder.get_object("cbAreaClickEnabled").set_active(self.pressing_pad_clicks())
		for row in cbAreaType.get_model():
			if key == row[1]:
				cbAreaType.set_active_iter(row.iter)
				break
		self._recursing = False


	def on_btCircularAxis_clicked(self, *a):
		def cb(action):
			self.circular_axis = action
			btCircularAxis = self.builder.get_object("btCircularAxis")
			btCircularAxis.set_label(action.describe(Action.AC_PAD))
			self.editor.set_action(self.make_circular_action())

		b = SimpleChooser(self.app, "axis", cb)
		b.set_title(_("Select Axis"))
		b.display_action(Action.AC_STICK, self.circular_axis)
		b.show(self.editor.window)


	def on_btCircularButton_clicked(self, button, *a):
		index = 0 if button == self.builder.get_object("btCircularButton0") else 1
		def cb(action):
			self.circular_buttons[index] = action.button
			btCircularButton = self.builder.get_object("btCircularButton%s" % (index, ))
			btCircularButton.set_label(action.describe(Action.AC_PAD))
			self.editor.set_action(self.make_circular_action())

		b = SimpleChooser(self.app, "buttons", cb)
		b.set_title(_("Select Button"))
		b.display_action(Action.AC_STICK, self.circular_axis)
		b.show(self.editor.window)


	def on_btClearCircularAxis_clicked(self, *a):
		btCircularAxis = self.builder.get_object("btCircularAxis")
		self.circular_axis = NoAction()
		btCircularAxis.set_label(self.circular_axis.describe(Action.AC_PAD))
		self.editor.set_action(self.make_circular_action())


	def on_btClearCircularButtons_clicked(self, *a):
		btCircularButton0 = self.builder.get_object("btCircularButton0")
		btCircularButton1 = self.builder.get_object("btCircularButton1")
		self.circular_buttons = [ None, None ]
		btCircularButton0.set_label(NoAction().describe(Action.AC_PAD))
		btCircularButton1.set_label(NoAction().describe(Action.AC_PAD))
		self.editor.set_action(self.make_circular_action())


	def on_btSingleButton_clicked(self, *a):
		def cb(action):
			self.button = action
			btSingleButton = self.builder.get_object("btSingleButton")
			btSingleButton.set_label(self.button.describe(Action.AC_PAD))
			self.editor.set_action(self.button)

		b = SimpleChooser(self.app, "buttons", cb)
		b.set_title(_("Select Button"))
		b.display_action(Action.AC_STICK, self.circular_axis)
		b.show(self.editor.window)


	def on_cbAreaOSDEnabled_toggled(self, *a):
		self.editor.builder.get_object("cbOSD").set_active(
			self.builder.get_object("cbAreaOSDEnabled").get_active())


	def pressing_pad_clicks(self):
		"""
		Returns True if currently edited pad is set to press left mouse
		button when pressed.
		(yes, this is used somewhere)
		"""
		side = getattr(SCButtons, self.editor.get_id())
		c_action = self.app.current.buttons[side]
		if isinstance(c_action, ButtonAction):
			return c_action.button == Keys.BTN_LEFT
		return False


	def on_ok(self, action):
		if isinstance(action.strip(), AreaAction):
			# Kinda hacky way to set action on LPAD press or RPAD press
			# when user selects Mouse Area as ouput and checks
			# 'Pressing the Pad Clicks' checkbox
			side = getattr(SCButtons, self.editor.get_id())
			clicks = self.pressing_pad_clicks()

			if self.builder.get_object("cbAreaClickEnabled").get_active():
				if not clicks:
					# Turn pad press into mouse clicks
					self.app.set_action(self.app.current, side, ButtonAction(Keys.BTN_LEFT))
			else:
				if clicks:
					# Clear action created above if checkbox is uncheck
					self.app.set_action(self.app.current, side, NoAction())


	def on_mouse_options_changed(self, *a):
		if self._recursing : return
		action = self.make_mouse_action()
		self.editor.set_action(action)


	def make_mouse_action(self):
		"""
		Loads values from UI into trackball-related action
		"""
		cbMouseOutput = self.builder.get_object("cbMouseOutput")
		a_str = cbMouseOutput.get_model().get_value(cbMouseOutput.get_active_iter(), 2)
		return self.parser.restart(a_str).parse()


	def make_circular_action(self):
		"""
		Constructs Circular Modifier
		"""
		if self.circular_axis and any(self.circular_buttons):
			return CircularModifier(MultiAction(
				self.circular_axis, ButtonAction(*self.circular_buttons)))
		elif any(self.circular_buttons):
			return CircularModifier(ButtonAction(*self.circular_buttons))
		else:
			return CircularModifier(self.circular_axis)


	def make_area_action(self):
		"""
		Loads values from UI into new AreaAction or subclass.
		"""
		# Prepare
		cbAreaType = self.builder.get_object("cbAreaType")
		# Read numbers
		x1 = self.builder.get_object("sbAreaX1").get_value()
		y1 = self.builder.get_object("sbAreaY1").get_value()
		x2 = self.builder.get_object("sbAreaX2").get_value()
		y2 = self.builder.get_object("sbAreaY2").get_value()
		# Determine exact action type by looking into Area Type checkbox
		# (this part may seem little crazy)
		# ... numbers
		key = cbAreaType.get_model().get_value(cbAreaType.get_active_iter(), 1)
		if "-" in key:
			if key[-2] == "1":
				# Before-last character ius "1", that means that X coords are
				# counted from other side and has to be negated
				x1, x2 = -x1, -x2
			if key[-1] == "1":
				# Key ends with "1". Same thing as above but for Y coordinate
				y1, y2 = -y1, -y2
		if "size" in key:
			x1, y1, x2, y2 = x1 / 100.0, y1 / 100.0, x2 / 100.0, y2 / 100.0
		# ... class
		if "window-" in key:
			cls = WinAreaAction
			self.relative_area = False
		elif "screensize" == key:
			cls = RelAreaAction
			self.relative_area = True
		elif "windowsize" == key:
			cls = RelWinAreaAction
			self.relative_area = True
		else: # "screen" in key
			cls = AreaAction
			self.relative_area = False
		if not self.relative_area:
			x1, y1, x2, y2 = int(x1), int(y1), int(x2), int(y2)

		return cls(x1, y1, x2, y2)


	def get_button_title(self):
		return _("Joystick / Mouse")


	def handles(self, mode, action):
		if isinstance(action, (NoAction, MouseAction, CircularModifier,
					InvalidAction, AreaAction, ButtonAction)):
			return True
		if isinstance(action, BallModifier):
			if isinstance(action.action, XYAction):
				return (
					isinstance(action.action.x, (AxisAction, MouseAction))
					and isinstance(action.action.x, (AxisAction, MouseAction))
				)
			return isinstance(action.action, MouseAction)
		if isinstance(action, XYAction):
			p = [ None, None ]
			for x in (0, 1):
				if len(action.actions[0].strip().parameters) >= x:
					if len(action.actions[x].strip().parameters) > 0:
						p[x] = action.actions[x].strip().parameters[0]
			if p[0] == Axes.ABS_X and p[1] == Axes.ABS_Y:
				return True
			elif p[0] == Axes.ABS_RX and p[1] == Axes.ABS_RY:
				return True
			elif p[0] == Axes.ABS_HAT0X and p[1] == Axes.ABS_HAT0Y:
				return True
			elif p[0] == Rels.REL_HWHEEL and p[1] == Rels.REL_WHEEL:
				return True
		return False


	def on_area_options_changed(self, *a):
		if self._recursing : return
		action = self.make_area_action()
		self.editor.set_action(action)
		self.update_osd_area(action)
		for x in ('sbAreaX1', 'sbAreaX2', 'sbAreaY1', 'sbAreaY2'):
			spin = self.builder.get_object(x)
			if self.relative_area:
				spin.get_adjustment().set_upper(100)
			else:
				spin.get_adjustment().set_upper(1000)
			self.on_sbArea_output(spin)


	def on_sbArea_output(self, button, *a):
		if self.relative_area:
			button.set_text("%s %%" % (button.get_value()))
		else:
			button.set_text("%s px" % (int(button.get_value())))


	def on_sbArea_focus_out_event(self, button, *a):
		GLib.idle_add(self.on_sbArea_output, button)


	def on_sbArea_changed(self, button, *a):
		self.on_sbArea_output(button)
		self.on_area_options_changed(button)


	def on_lblSetupTrackball_activate_link(self, trash, link):
		self.editor.on_link(link)


	def on_cbAxisOutput_changed(self, *a):
		cbAxisOutput = self.builder.get_object("cbAxisOutput")
		stActionData = self.builder.get_object("stActionData")
		key = cbAxisOutput.get_model().get_value(cbAxisOutput.get_active_iter(), 2)
		if key == 'area':
			stActionData.set_visible_child(self.builder.get_object("grArea"))
			action = self.make_area_action()
			self.update_osd_area(action)
		elif key == "button":
			stActionData.set_visible_child(self.builder.get_object("vbButton"))
			self.button = self.button or ButtonAction(Keys.BTN_GAMEPAD)
			action = self.button
		elif key == "circular":
			stActionData.set_visible_child(self.builder.get_object("grCircular"))
			action = self.make_circular_action()
		elif key == 'mouse':
			stActionData.set_visible_child(self.builder.get_object("vbMose"))
			if not self._recursing and self.editor.friction == 0:
				# When switching to mouse, enable trackball by default
				self.editor.friction = 10
			action = self.make_mouse_action()
		else:
			stActionData.set_visible_child(self.builder.get_object("nothing"))
			action = cbAxisOutput.get_model().get_value(cbAxisOutput.get_active_iter(), 0)
			action = self.parser.restart(action).parse()
			self.update_osd_area(None)

		self.editor.set_action(action)


class FakeMapper:
	"""
	Class that pretends to be mapper used when calling update_osd_area.
	It has two purposes: To provide get_xdisplay() method that does what it says
	and get_active_window() that returns any other window but window that
	belongs to SC-Controller gui application.
	"""
	def __init__(self, editor):
		self._xdisplay = X.Display(hash(GdkX11.x11_get_default_xdisplay()))
		self.editor = editor

	def get_xdisplay(self):
		return self._xdisplay

	def get_current_window(self):
		"""
		Gets last active window that was not part of SC-Controller.
		Uses _NET_CLIENT_LIST_STACKING property of root window, value provided
		by window manager. If that fail (because of no or not ICCM compilant WM),
		simply returns root window.
		"""
		root = X.get_default_root_window(self._xdisplay)
		NET_WM_WINDOW_TYPE_NORMAL = X.intern_atom(self._xdisplay,
				bytes("_NET_WM_WINDOW_TYPE_NORMAL", "utf-8"), False)
		my_windows = [ x.get_xid() for x
				in Gdk.Screen.get_default().get_toplevel_windows() ]
		nitems, prop = X.get_window_prop(self._xdisplay,
				root, bytes("_NET_CLIENT_LIST_STACKING", "utf-8"), max_size=0x8000)

		if nitems > 0:
			for i in reversed(range(0, nitems)):
				window = cast(prop, POINTER(X.XID))[i]
				if window in my_windows:
					# skip over my own windows
					continue
				if not X.is_window_visible(self._xdisplay, window):
					# skip minimized and invisible windows
					continue
				tp = X.get_window_prop(self._xdisplay, window,
						bytes("_NET_WM_WINDOW_TYPE", "utf-8"))[-1]
				if tp is not None:
					tpval = cast(tp, POINTER(X.Atom)).contents.value
					X.free(tp)
					if tpval != NET_WM_WINDOW_TYPE_NORMAL:
						# skip over non-normal windows
						continue
				X.free(prop)
				return window
		if prop is not None:
			X.free(prop)

		# Failed to get property or there is not any usable window
		return root
