from __future__ import division
import serial

class Plotter:

    def __init__(self,boundaries=None):
        self.boundaries=boundaries
        self.p0incenter = False
        if not boundaries:
            s=self.getoutput(b'OW;')
            print(s)
            if not s:
                self.ser=None
            else:
                self.boundaries = tuple(int(x) for x in "".join(s).split(","))

    def getoutput(self,outstr):
        try:
            self.ser = serial.Serial('/dev/ttyUSB0',timeout=15)
            print ('try to get Status')
            if not self.ser:
                print ('Plotter not available')
                return None
            self.ser.write(outstr)
            print ('device busy')
            s = []
            while True:
                x = self.ser.read()

                if x == b"\x0d" or not x:
                    break
                s.append(x)
            return b''.join(s).decode()
        except OSError:
            return None
    @property
    def xmin(self):
        return self.boundaries[0]

    @property
    def ymin(self):
        return self.boundaries[1]

    @property
    def xmax(self):
        return self.boundaries[2]

    @property
    def ymax(self):
        return self.boundaries[3]

    @property
    def center(self):
        return (self.xmin + self.xmax)/2, (self.ymin + self.ymax)/2

    def write(self,programm):
         self.ser.write(str(programm).encode())

    @property
    def winsize(self):
        return self.xmax-self.xmin , self.ymax - self.ymin

    def oob(self, prog):
        return (prog.xmax > self.xmax or prog.xmin < self.xmin or prog.ymin < self.ymin or prog.ymax > self.ymax)



    def plot(self,prog):
        if self.ready  and  (not self.oob(prog)) :
            self.write(prog)

        if self.oob(prog):
            print ('programm out of bound')
        if not self.ready:
            print ('device not ready')


    def centralize(self,prog):
        return prog-prog.center \
               if self.p0incenter else \
                prog-(prog.xmin,prog.ymin)
    @property
    def ready(self):
        return bool(self.getoutput('OS;'))