# -*- coding: utf-8 -*-

import os
import sys
import subprocess
from urllib import urlopen
try:
    import psutil
except ImportError:
    sys.stderr.write('Error: Yunohost CLI Require psutil\n')
    sys.stderr.write('apt-get install python-psutil\n')
    sys.exit(1)
try:
    import netifaces
except ImportError:
    sys.stderr.write('Error: Yunohost CLI Require netifaces\n')
    sys.stderr.write('apt-get install python-netifaces\n')
    sys.exit(1)
from datetime import datetime, timedelta
from yunohost import YunoHostError, win_msg, colorize, validate, get_required_args

def bytes2human(n):
    symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
    prefix = {}
    for i, s in enumerate(symbols):
        prefix[s] = 1 << (i+1)*10
    for s in reversed(symbols):
        if n >= prefix[s]:
            value = float(n) / prefix[s]
            return '%.1f%s' % (value, s)
    return "%sB" % n

def check_disk():
    result = {}
    for part in psutil.disk_partitions(all=False):
        usage = psutil.disk_usage(part.mountpoint)
        result[part.mountpoint] = { 'Total' : str(bytes2human(usage.total)), 'Used' : str(bytes2human(usage.used)),
        'Free' : str(bytes2human(usage.free)), 'Percent' : str(usage.percent) + '%' }
    return { 'Partition' : result }

def check_cpu():
     return { 'CPU' : psutil.cpu_percent(interval=3) }

def check_memory():
    mem = getattr(psutil.phymem_usage(), "total")
    memused = getattr(psutil.phymem_usage(), "used")
    mempercent = getattr(psutil.phymem_usage(), "percent")
    swap = getattr(psutil.virtmem_usage(), "total")
    swapused = getattr(psutil.virtmem_usage(), "used")
    swappercent = getattr(psutil.virtmem_usage(), "percent")
    return { 'Memory' : { 'Total' : str(bytes2human(mem)), 'Used' : str(bytes2human(memused)), 'Percent' : str(mempercent) + '%' },
    'Swap' : { 'Total' : str(bytes2human(swap)), 'Used' : str(bytes2human(swapused)), 'Percent' : str(swappercent) + '%' } }

def ifconfig():
    listinterfaces = netifaces.interfaces()[1:]
    for interface in listinterfaces:
        try:
            for link in netifaces.ifaddresses(interface)[netifaces.AF_INET]:
                ip = link['addr']
                for link in netifaces.ifaddresses(interface)[netifaces.AF_LINK]:
                    mac = link['addr']
        except:
            pass
    return { 'IP' : ip, 'MAC' : mac }

def uptime():
    uptime = (str(datetime.now() - datetime.fromtimestamp(psutil.BOOT_TIME)).split('.')[0])
    return { 'Uptime' : uptime }

def public():
    try:
        ip = str(urlopen('http://ip.yunohost.org').read())
    except:
        raise YunoHostError(1, _("No connection") )
    return { 'Public IP' : ip }

def processcount():
    processcount = {'total': 0, 'running': 0, 'sleeping': 0}
    process_all = [proc for proc in psutil.process_iter()]
    for proc in process_all:
        try:
            if not proc.is_running():
                try:
                    process_all.remove(proc)
                except Exception:
                    pass
        except psutil.error.NoSuchProcess:
            try:
                self.process_all.remove(proc)
            except Exception:
                pass
        else:
            try:
                processcount[str(proc.status)] += 1
            except psutil.error.NoSuchProcess:
                pass
            except KeyError:
                processcount[str(proc.status)] = 1
            finally:
                processcount['total'] += 1
            try:
                process.append(self.__get_process_stats__(proc))
            except Exception:
                pass
    return { 'Total' : str(processcount['total']), 'Running' :  str(processcount['running']),  'Sleeping' :  str(processcount['sleeping']) }

def process_enable(args):
    output = subprocess.Popen(['update-rc.d', args, 'defaults'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
    if output.wait() == 0:
        resultat = process_start(args)
        return resultat
    else:
        raise YunoHostError(1, 'Enable : ' + args.title() + " " + _("failure"))

def process_disable(args):
    output = subprocess.Popen(['update-rc.d', args, 'remove'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
    if output.wait() == 0:
        resultat = process_stop(args)
        return resultat
    else:
        raise YunoHostError(1, 'Disable : ' + args.title() + " " + _("failure"))

def process_start(args):
    output = subprocess.Popen(['service', args, 'start'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
    if output.wait() == 0:
        return { 'Start' : args.title() }
    else:
        raise YunoHostError(1, 'Start : ' + args.title() + " " + _("failure"))

def process_stop(args):
    output = subprocess.Popen(['service', args, 'stop'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
    if output.wait() == 0:
        return { 'Stop' : args.title() }
    else:
        raise YunoHostError(1, 'Stop : ' + args.title() + " " + _("failure"))

def process_check(args):
    ip = public()['Public IP']
    output = os.system('/usr/lib/nagios/plugins/check_tcp -H localhost -p' + args  + ' > /dev/null')
    if output == 0:
        output = os.system('/usr/lib/nagios/plugins/check_tcp -H ' + ip + ' -p' + args  + ' > /dev/null')
        if output == 0:
            return { 'Port' : args + " " + _("is open") }
        else:
            return { 'Warning' : args + " " + _("is closed in your box") }
    else:
        raise YunoHostError(1, args + " " + _("is closed") )


def monitor_info(args):
    if args['memory']:
       resultat = check_memory()
       return resultat
    elif args['cpu']:
        resultat = check_cpu()
        return resultat
    elif args['disk']:
       resultat = check_disk()
       return resultat
    elif args['ifconfig']:
       resultat = ifconfig()
       return resultat
    elif args['uptime']:
       resultat = uptime()
       return resultat
    elif args['public']:
       resultat = public()
       return resultat

def monitor_process(args):
    if args['enable']:
        resultat = process_enable(args['enable'])
        return resultat
    elif args['disable']:
        resultat = process_disable(args['disable'])
        return resultat
    elif args['start']:
        resultat = process_start(args['start'])
        return resultat
    elif args['stop']:
        resultat = process_stop(args['stop'])
        return resultat
    elif args['check']:
        resultat = process_check(args['check'])
        return resultat
    elif args['info']:
        resultat = processcount()
        return resultat