#! /usr/bin/env python

import os, time, sys

WAIT_FOR = {'mplayer': True,
            'mpg123': True,
            'flac123': True,
            'ogle': True,
            'copytorrent.py': True,
            }
LOAD_LIMIT = 0
MOD = {}
if len(sys.argv) > 1:
    WAIT_FOR.clear()
for name in sys.argv[1:]:
    if name.startswith('--mod='):
        MOD[name[len('--mod='):]] = None
        continue
    try:
        LOAD_LIMIT = float(name)
    except ValueError:
        WAIT_FOR[name] = True

mypidname = str(os.getpid())
repeat = 0

while True:
    wait_for = []
    if WAIT_FOR:
        for pidname in os.listdir('/proc'):
            if not pidname.isdigit() or pidname == mypidname:
                continue
            try:
                name = os.path.basename(os.readlink('/proc/%s/exe' % pidname))
                if name in WAIT_FOR:
                    wait_for.append(name)
            except OSError:
                pass
    if LOAD_LIMIT > 0:
        #if LOAD_LIMIT > 800:
        #    f = open('/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq',
        #             'r')
        #    loadavg = f.read().strip()
        #    f.close()
        #    loadavg = int(loadavg) // 1000
        #else:
        f = open('/proc/loadavg', 'r')
        loadavg = f.readline().split()[0]
        f.close()
        if float(loadavg) >= LOAD_LIMIT:
            wait_for.append('loadavg: %s >= %s' % (loadavg, LOAD_LIMIT))
    if MOD:
        for name, prevvalue in MOD.items():
            try:
                st = os.stat(name)
                value = (st.st_size, st.st_mtime)
            except OSError:
                value = None
            if value != prevvalue:
                MOD[name] = value
                wait_for.append('--mod=%s' % (name,))
    if wait_for:
        print 'Waiting for',
        for name in wait_for:
            print '[%s]' % (name,),
        print
        repeat = 0
    else:
        if repeat == 3:
            break
        print 'Done, %d seconds until exit...' % (6 - 2*repeat,)
        repeat += 1
    time.sleep(2)

print 'Exit.'