# the implementation here is a bit crappy.
from boxbranding import getBoxType
import time
from Directories import resolveFilename, SCOPE_CONFIG

PERCENTAGE_START = 0
PERCENTAGE_END = 100

profile_start = time.time()

profile_data = {}
total_time = 1
profile_file = None

try:
	f = open(resolveFilename(SCOPE_CONFIG, "profile"), "r")
	profile_old = f.readlines()
	f.close()

	t = None
	for line in profile_old:
		(t, id) = line[:-1].split('\t')
		t = float(t)
		total_time = t
		profile_data[id] = t
except:
	print "no profile data available"

try:
	profile_file = open(resolveFilename(SCOPE_CONFIG, "profile"), "w")
except IOError:
	print "WARNING: couldn't open profile file!"

# GML: Set the device and format here...probably more could be added?
#      I've now based this on the device setting and formats used in
#      /etc/init,.d/rc, as every box will be running that anyway.
#
import os.path
if os.path.exists("/proc/progress"):
	dev_fmt = ("/proc/progress", "%d\n")
elif os.path.exists("/proc/vfd"):
	dev_fmt = ("/proc/vfd", "%d%%\n")
elif os.path.exists(/"/dev/mcu"):
	dev_fmt = ("/dev/mcu", "%d\n")
else:
	dev_fmt = ("/dev/null", "")
(dev, fmt) = dev_fmt

def profile(id):
	now = time.time() - profile_start
	if profile_file:
		profile_file.write("%7.3f\t%s\n" % (now, id))

# GML: No point trying if we can't achieve anything
#
		if dev == "/dev/null":
			return

		if id in profile_data:
			t = profile_data[id]
			if total_time:
				perc = t * (PERCENTAGE_END - PERCENTAGE_START) / total_time + PERCENTAGE_START
			else:
				perc = PERCENTAGE_START
			try:
				f = open(dev, "w")
				f.write(fmt % perc)
				f.close()
			except IOError:
				pass

def profile_final():
	global profile_file
	if profile_file is not None:
		profile_file.close()
		profile_file = None