from vanilla import Button, List, Group
from mojo.subscriber import Subscriber, registerGlyphEditorSubscriber


SCALE_FACTOR = 0.5

class OverlayViewController(Subscriber):

    debug = True
    ctrlGroup = None

    def build(self):
        glyphEditor = self.getGlyphEditor()

        # merz view
        self.container = glyphEditor.extensionContainer(
            identifier="com.roboFont.OverlayViewController.foreground",
            location="foreground",
            clear=True)

        # controls
        self.ctrlGroup = Group((0, -200, -0, -0))
        self.ctrlGroup.button1 = Button((-130, -40, 120, 22),
                                        "Hit Me",
                                        callback=self.button1Callback)
        self.ctrlGroup.button2 = Button((-260, -40, 120, 22),
                                        "Show Controls",
                                        callback=self.button2Callback)
        self.ctrlGroup.button2.getNSButton().setShowsBorderOnlyWhileMouseInside_(True)
        self.ctrlGroup.list = List((-260, 10, -10, -50),
                                   ["a", "b", "c", "Do SomeThing"])

        # add the view to the GlyphEditor
        glyphEditor.addGlyphEditorSubview(self.ctrlGroup)

    def destroy(self):
        self.container.clearSublayers()

    def glyphEditorGlyphDidChange(self, info):
        glyph = info["glyph"]
        if glyph is None:
            return
        self.updateLettersPreview(glyph)

    def glyphEditorDidSetGlyph(self, info):
        glyph = info["glyph"]
        if glyph is None:
            return
        self.updateLettersPreview(glyph)

    def updateLettersPreview(self, glyph):
        self.container.clearSublayers()
        referenceGlyphs = [glyph.font[nn] for nn in "no" if nn in glyph.font]

        with self.container.sublayerGroup():
            self.container.addSublayerScaleTransformation(SCALE_FACTOR)

            advancement = glyph.width/SCALE_FACTOR
            for eachGlyph in referenceGlyphs:
                glyphPath = eachGlyph.getRepresentation("merz.CGPath")
                glyphView = self.container.appendPathSublayer(
                    fillColor=(0, 0, 0, .35),
                    position=(advancement, 0),
                    name=f'{eachGlyph.name}_layer'
                )
                glyphView.setPath(glyphPath)
                advancement += eachGlyph.width

    # button callbacks
    def button1Callback(self, sender):
        print('button 1 pressed')

    def button2Callback(self, sender):
        print('button 2 pressed')


if __name__ == '__main__':
    registerGlyphEditorSubscriber(OverlayViewController)