#!/usr/bin/env python3

# -------------------- #
# Palette + Subscriber #
# -------------------- #

# -- Modules -- #
import ezui
from mojo.subscriber import Subscriber, WindowController, getRegisteredSubscriberEvents
from mojo.subscriber import registerGlyphEditorSubscriber, unregisterGlyphEditorSubscriber
from mojo.roboFont import OpenWindow
from mojo.events import postEvent
from mojo.subscriber import registerSubscriberEvent


DEFAULT_KEY = 'com.developerName.SomeTool'


class ToolPalette(WindowController):

    debug = True
    thickness = 5

    def build(self):
        content = """
        ----X----  123    @slider
        """

        descriptionData = dict(
            slider=dict(
                minValue=0,
                value=self.thickness,
                maxValue=25,
                stopOnTickMarks=True,
                tickMarks=6,
                continuous=False
            )
        )

        self.w = ezui.EZWindow(
            title="Tool",
            size=(200, "auto"),
            content=content,
            descriptionData=descriptionData,
            controller=self
        )

    def started(self):
        self.w.open()
        Tool.controller = self
        registerGlyphEditorSubscriber(Tool)

    def destroy(self):
        unregisterGlyphEditorSubscriber(Tool)
        Tool.controller = None

    def sliderCallback(self, sender):
        self.thickness = sender.get()
        postEvent(f"{DEFAULT_KEY}.changed")


class Tool(Subscriber):
    """
    Tool can only ask for information to the palette

    """

    debug = True
    controller = None

    def build(self):
        glyphEditor = self.getGlyphEditor()
        container = glyphEditor.extensionContainer(identifier=DEFAULT_KEY,
                                                   location='background',
                                                   clear=True)
        self.path = container.appendPathSublayer(
            fillColor=(0, 0, 0, 0),
            strokeColor=(1, 0, 0, 1),
            strokeWidth=self.controller.thickness if self.controller else 0,
        )
        glyph = self.getGlyphEditor().getGlyph()
        self.path.setPath(glyph.getRepresentation("merz.CGPath"))

    def destroy(self):
        glyphEditor = self.getGlyphEditor()
        container = glyphEditor.extensionContainer(DEFAULT_KEY, location='background')
        container.clearSublayers()

    def glyphEditorGlyphDidChangeOutline(self, info):
        self.path.setPath(info['glyph'].getRepresentation("merz.CGPath"))

    def paletteDidChange(self, info):
        self.path.setStrokeWidth(self.controller.thickness)


# -- Instructions -- #
if __name__ == '__main__':
    eventName = f"{DEFAULT_KEY}.changed"

    # we register the subscriber event only if necessary
    if eventName not in getRegisteredSubscriberEvents():
        registerSubscriberEvent(
            subscriberEventName=eventName,
            methodName="paletteDidChange",
            lowLevelEventNames=[eventName],
            dispatcher="roboFont",
            documentation="Send when the tool palette did change parameters.",
            delay=0,
            debug=True
        )
    OpenWindow(ToolPalette)