# helloworld.py
import pygubu
import sys
import os

sys.path.insert(0, "GUI/TKinter/.")
from interpreter import imageWrapper as imageWrapper
from interpreter import lexer as lexer
from interpreter import tokens as lexerTokens
from interpreter import colors as colors
from interpreter import movement as movement
from interpreter import executionFunctions as main
from interpreter.dataStructures import programState, direction, position
import threading

from GUI import infoManager
from GUI import canvasManager


class GUI:
    def __init__(self):
        # In pixelWidth/height per pixel. scaleSize = 25 means that every pixel will show as a 25x25 square
        self.scaleSize = 25
        # In percentage
        self.executionSpeed = 15

        # In seconds
        self.maxWait = 5

        self.image = None
        self.graph = None
        self.programState = None
        self.selectedPosition = None

        self.optionBar = None
        self.actionBar = None
        self.content = None
        self.canvas = None

        #1: Create a builder
        self.builder = builder = pygubu.Builder()

        #2: Load an ui file
        builder.add_from_file("{}/tkinterLayout.ui".format(os.path.abspath(os.path.dirname(__file__))))

        #3: Create the mainwindow
        self.mainwindow = builder.get_object('rootWindow')

        self.initializeFrames()
        self.initializeCallbacks()
        self.infoManager = infoManager.infoManager(self.builder, self.generalInfoFrame, self.programStateInfoFrame)
        self.canvasManager = canvasManager.canvasManager(self.canvas, self.image, self.programState, self.scaleSize)


    def run(self):
        self.mainwindow.mainloop()


    def initializeCallbacks(self):
        self.builder.connect_callbacks({
            'loadFile': self.loadFile,
            'setScale': self.setScale,
            'takeStep': self.takeStep,
            'setExecutionSpeed': self.setExecutionSpeed,
            'setBreakpoint': self.setBreakpoint,
            'runProgram': self.runProgram,
            'updateHighlight': self.toggleHighlight
        })

        self.canvas.bind("<Button-1>", self.canvasPressed)

    def initializeFrames(self):
        self.optionBar = self.builder.get_object('optionBar', self.mainwindow)
        self.content = self.builder.get_object('content', self.mainwindow)
        self.actionBar = self.builder.get_object('actionBar', self.mainwindow)
        self.generalInfoFrame = self.builder.get_object("generalInfoFrame", self.content)
        self.programStateInfoFrame = self.builder.get_object("programStateInfoFrame", self.content)
        canvasFrame = self.builder.get_object('canvasFrame', self.content)
        self.canvas = self.builder.get_object('canvas', canvasFrame)


    def update(self):
        self.infoManager.updateInfo(self.image, self.graph, self.programState)
        self.canvasManager.updateScaleSize(self.scaleSize)
        self.canvasManager.updateImage(self.image)
        self.canvasManager.updateProgramState(self.programState)
        self.canvasManager.updateCanvas()


    def takeStep(self):
        if self.image is None or self.programState is None or self.graph is None:
            return None

        newProgramState = main.takeStep(self.image, self.programState)
        if isinstance(newProgramState, bool):
            return False

        self.programState = newProgramState
        self.selectedPosition = self.programState.position
        self.update()
        print("Take step!")
        return True


    def setBreakpoint(self):
        print("BREAKPOINT")

    def setFileText(self, filePath):
        print("Filepath: {}".format(filePath))
        self.builder.get_object("fileNameEntry", self.optionBar).delete(0, len(self.builder.get_object("fileNameEntry", self.optionBar).get()))
        self.builder.get_object("fileNameEntry", self.optionBar).insert(0, filePath)
        print("Get filepath: {}".format(self.builder.get_object("fileNameEntry", self.optionBar).get()))

    def setExecutionSpeed(self, pos):
        if 0 < float(pos) < 100:
            self.executionSpeed = float(pos)

    def toggleHighlight(self):
        print(self.builder.get_object("highlightEdgeCheck", self.actionBar).instate(['selected']))

    def getWaitTime(self):
        return self.executionSpeed/100*self.maxWait

    def runProgram(self):
        if self.graph is None or self.image is None:
            return None

        step = self.takeStep()
        if step:
            timer = threading.Timer(self.getWaitTime(), self.runProgram)
            timer.start()
            return True
        else:
            return False


    def setScale(self):
        scaleValue = int(self.builder.get_object('scaleEntry', self.optionBar).get())
        if 0 < scaleValue < 100:
            self.scaleSize = int(scaleValue)
            self.update()
        print("SCALE")


    def loadFile(self):
        fileName = self.builder.get_object('fileNameEntry', self.optionBar).get()
        if len(fileName) < 1:
            return None

        self.image = imageWrapper.getImage(fileName)
        self.graph = lexer.graphImage(self.image)[0]
        self.programState = programState(self.graph, position((0,0)), direction((0,0)))

        self.update()
        print("LOAD FILE!")


    def canvasPressed(self, event):
        unscaled_x = int(event.x / self.scaleSize)
        unscaled_y = int(event.y / self.scaleSize)

        self.selectedPosition = (unscaled_x, unscaled_y)
        self.update()


if __name__ == '__main__':
    app = GUI()
    app.run()