import asyncio
import serial_asyncio
import os, subprocess
import argparse
import traceback

#5 - 101 - a d
#4 - xxx
#3 - 104 - 1 2 3 4 5
#2 - 103 - hz
#1 - 102 - w s
#upButton = 1001

DEBUGIO = os.environ.get("DEBUGIO", False)

class MOVEMENT:
    RIGHT = 1
    NONE = 0
    LEFT = -1

class Pin:
    def __init__(self, id, initValue):
        self.id = id
        self.value = initValue
        self.movement = MOVEMENT.NONE

    def updateValue(self, value): #(Pin.class, value, movement)
        if self.value == value:
            self.value = 0
            self.movement = MOVEMENT.NONE
            return (self, self.value, MOVEMENT.NONE)
        else:
            self.movement = MOVEMENT.LEFT if value < self.value else MOVEMENT.RIGHT
            self.value = value
            return (self, value, self.movement)
        
    def __call__(self):
        return (self, self.value, self.movement)


class ENTER:
    def __init__(self):
        self.pin = 1001
        self.enter = "xdotool key Return".split()
    def __call__(self, data):
        if DEBUGIO:
            print(self.enter)
        subprocess.Popen(self.enter)

class AD:
    def __init__(self):
        self.pin = 101
        self.a = "xdotool key a".split()
        self.d = "xdotool key d".split()

    def __call__(self, data):
        if data[2] == MOVEMENT.LEFT:
            if DEBUGIO:
                print(self.a)
            subprocess.Popen(self.a)
        if data[2] == MOVEMENT.RIGHT:
            if DEBUGIO:
                print(self.d)
            subprocess.Popen(self.d)

class WS:
    def __init__(self):
        self.pin = 101
        self.w = "xdotool key w".split()
        self.s = "xdotool key s".split()

    def __call__(self, data):
        if data[2] == MOVEMENT.LEFT:
            if DEBUGIO:
                print(self.s)
            subprocess.Popen(self.s)
        if data[2] == MOVEMENT.RIGHT:
            if DEBUGIO:
                print(self.w)
            subprocess.Popen(self.w)

class MODE:
    def __init__(self):
        self.pin = 104
        self.min_key = 1
        self.max_key = 5
        self.current_key = 1

    def __call__(self, data):
        if data[2] == MOVEMENT.LEFT:
            self.current_key -= 1
        if data[2] == MOVEMENT.RIGHT:
            self.current_key += 1

        if (self.current_key < self.min_key):
            self.current_key = self.min_key 

        if (self.current_key > self.max_key):
            self.current_key = self.max_key

        cmd = f"xdotool key {self.current_key}".split()
        if DEBUGIO:
            print(cmd)
        subprocess.Popen(cmd)

class Listener(asyncio.Protocol):
    binds = {
        101: AD(),
        104: MODE(),
        102: WS(),
        1001: ENTER()
    }

    def __init__(self):
        super().__init__()
        self.buffer = b""
        self.store = {}

    def connection_made(self, transport):
        self.transport = transport
        print("Connected")
    
    def data_received(self, data):
        self.buffer += data
        lines = self.buffer.split(b'\n')
        self.buffer = lines[-1]

        for line in lines[:-1]:
            line = line.decode().replace("\r", "")
            if DEBUGIO:
                print(line)
            try:
                pin, value = line.split("*")
                pin = int(pin)
                value = int(value)
                if DEBUGIO:
                    print(pin, value)

                if pin not in self.store:
                    self.store[pin] = Pin(pin, value)
                else:
                    self.store[pin].updateValue(value)

                self.useX(self.store[pin]())
            except:
                if DEBUGIO:
                    traceback.print_exc()
                    print("Cannot parse")
                else:
                    pass

    def useX(self, pin):
        if pin[0].id in self.binds:
            self.binds[pin[0].id](pin)

if __name__ == "__main__":
    os.environ['DISPLAY'] = ':0'

    parser = argparse.ArgumentParser()
    parser.add_argument("--serial", type=str, default="/dev/serial0")
    parser.add_argument("--baudrate", type=int, default=9600)
    args = parser.parse_args()

    loop = asyncio.get_event_loop()
    coro = serial_asyncio.create_serial_connection(loop, Listener, args.serial, baudrate = args.baudrate)
    transport, protocol = loop.run_until_complete(coro)
    loop.run_forever()
    loop.close()