import strip
import time


class Alert(strip.Animation):
    def init(self):
        self.min0 = 0  # Start LED of the first moving pixel
        self.min1 = 109  # Start LED of the seconds moving pixel

        self.max0 = self.max1 = 37  # LED where the to moving pixels should collide

        self.x0 = self.min0  # x position of the first moving led
        self.x1 = self.min1  # x position of the seconds moving led

        self.d0 = 1 if self.min0 < self.max0 else -1  # Direction of the first moving led
        self.d1 = 1 if self.min1 < self.max1 else -1  # Direction of the second moving led

        self.time = 2  # After n seconds should both moving pixels collide

        self.sp0 = float(self.time) / abs(self.max0 - self.min0)  # speed of the first moving led (seconds/x)
        self.sp1 = float(self.time) / abs(self.max1 - self.min1)  # speed of the seconds moving led (seconds/x)

        self.t0 = self.t1 = time.time()  # timers

    def cycle(self):
        if not (self.x0 == self.x1):  # If not both at the same position
            tnow = time.time()
            dt0 = tnow - self.t0
            dt1 = tnow - self.t1

            if dt0 >= self.sp0:
                self.t0 = time.time()
                self.x0 += self.d0
                self.strip.set_led(self.x0, 0, 0, 50)

            if dt1 >= self.sp1:
                self.t1 = time.time()
                self.x1 += self.d1
                self.strip.set_led(self.x1, 50, 0, 0)


if __name__ == "__main__":
    strp = strip.Strip(109)
    print "strip created"
    strp.show_animation(Alert)
    time.sleep(11)
    print "show_animation done"
    strp.stop_animation()
    time.sleep(0.1)