#!/usr/bin/env python

import socket, os, time, struct
from threading import Thread, Event
from daemon import runner
import RPi.GPIO as GPIO

gpio_state = 11
gpio_psw = 12
gpio_rsw = 13
gpio_pled = 15

bmcd_state = '/run/bmcd/bmcd.state'
bmcd_cmd = '/run/bmcd/bmcd.cmd'
pidfile = '/run/bmcd/bmcd.pid'

is_pled_flashing = Event()

def powerled_on():
    GPIO.output(gpio_pled, 1)

def powerled_off():
    GPIO.output(gpio_pled, 0)

def powerled_flash(is_pled_flashing):
    while is_pled_flashing.isSet():
        GPIO.output(gpio_pled, 1)
        time.sleep(1)
        GPIO.output(gpio_pled, 0)
        time.sleep(1)
    is_pled_flashing.clear()
    return

def powersw_press():
    GPIO.output(gpio_psw, 1)
    time.sleep(0.5)
    GPIO.output(gpio_psw, 0)

def powersw_hold():
    GPIO.output(gpio_psw, 1)
    time.sleep(8)
    GPIO.output(gpio_psw, 0)

def resetsw_press():
    GPIO.output(gpio_rsw, 1)
    time.sleep(0.5)
    GPIO.output(gpio_rsw, 0)

def locate_on():
    is_pled_flashing.set()
    t = Thread(name='non-block', target=powerled_flash, args=(is_pled_flashing,))
    t.start()

def locate_off():
    is_pled_flashing.clear()

def readcmd():
    fcmd = open(bmcd_cmd, 'r+', 0)
    while True:
        line = fcmd.readline()
        try:
            globals()[line.rstrip()]()
        except:
            pass

def writestate(is_pled_flashing):
    state_prev = 1
    while True:
        state_now = GPIO.input(gpio_state)
    	fstate = open(bmcd_state, 'w+', 0)
        fstate.write(str(state_now) + '\n')
	fstate.close()
        if not is_pled_flashing.isSet():
            if state_now == 1:
                powerled_on()
            else:
                powerled_off()

        time.sleep(1)
       

class App():
    def __init__(self):
        self.stdin_path = '/dev/null'
        self.stdout_path = '/dev/tty'
        self.stderr_path = '/dev/tty'
        self.pidfile_path = pidfile
        self.pidfile_timeout = 5
    def run(self):
        if not os.path.exists(bmcd_state):
	    os.mkfifo(bmcd_state) 
        if not os.path.exists(bmcd_cmd):
	    os.mkfifo(bmcd_cmd)

        GPIO.setmode(GPIO.BOARD)
        GPIO.setup(gpio_state, GPIO.OUT)
        GPIO.setup(gpio_psw, GPIO.OUT)
        GPIO.setup(gpio_rsw, GPIO.IN)
        GPIO.setup(gpio_pled, GPIO.OUT)

        t1 = Thread(target=readcmd)
        t2 = Thread(target=writestate, args=(is_pled_flashing,))
        t1.setDaemon(True)
        t2.setDaemon(True)
        t1.start()
        t2.start()
        while True:
            pass

app = App()
daemon_runner = runner.DaemonRunner(app)
daemon_runner.do_action()