import socket
import fcntl
import struct
import psutil
import os
import sys
import time
home_dir = os.path.expanduser("~")
sys.path.append(home_dir)
import I2C_LCD_Driver
import SDL_DS1307




mylcd = I2C_LCD_Driver.lcd()
ds1307 = SDL_DS1307.SDL_DS1307(0, 0x68)

def get_ip_address(ifname):
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    return socket.inet_ntoa(fcntl.ioctl(
        s.fileno(),
        0x8915, 
        struct.pack('256s', ifname[:15])
    )[20:24])

#mylcd.lcd_display_string("hello",1)
#mylcd.lcd_display_string("IP Address:", 1) 

#mylcd.lcd_display_string(get_ip_address('eth0'), 2)
# Return RAM information (unit=kb) in a list                                       
# Index 0: total RAM                                                               
# Index 1: used RAM                                                                 
# Index 2: free RAM                                                                 

	
def getRAMinfo():
    p = os.popen('free')
    i = 0
    while 1:
        i = i + 1
        line = p.readline()
        if i==2:
            return(line.split()[1:4])

mylcd.lcd_clear()
while True:
    #CPU usage and time

	CPU_usage = psutil.cpu_percent(interval = .5)
	mylcd.lcd_display_string("CPU Load   %s%% " % (CPU_usage), 1)	
	mylcd.lcd_display_string("%s" % ds1307.read_datetime(), 2)
	time.sleep(3)
	mylcd.lcd_clear()
	#IP ADDRESS
	mylcd.lcd_display_string("IP Address : ", 1)
	mylcd.lcd_display_string(get_ip_address('eth0'), 2)
	time.sleep(3)
	mylcd.lcd_clear()
	#RAM USAGE
	RAM_stats = getRAMinfo()
	RAM_used = round(int(RAM_stats[1]) / 1000,1)
	RAM_free = round(int(RAM_stats[2]) / 1000,1)
	mylcd.lcd_display_string("RAM Used %sMB" % (RAM_used),1)
	mylcd.lcd_display_string("RAM Free  %sMB" % (RAM_free),2)
	time.sleep(3)
	mylcd.lcd_clear()
	mylcd.lcd_display_string("All your base",1)
	mylcd.lcd_display_string("are belong to us",2)
	time.sleep(3)
	mylcd.lcd_clear()