import os
import socket
import sys
from binascii import hexlify, unhexlify
from multiprocessing import current_process
from threading import current_thread, enumerate
import traceback

import shared
from debug import logger
import queues
import shutdown

def powQueueSize():
    curWorkerQueue = queues.workerQueue.qsize()
    for thread in enumerate():
        try:
            if thread.name == "singleWorker":
                curWorkerQueue += thread.busy
        except:
            pass
    return curWorkerQueue

def convertIntToString(n):
    a = __builtins__.hex(n)
    if a[-1:] == 'L':
        a = a[:-1]
    if (len(a) % 2) == 0:
        return unhexlify(a[2:])
    else:
        return unhexlify('0' + a[2:])

def convertStringToInt(s):
    return int(hexlify(s), 16)

def allThreadTraceback(frame):
    id2name = dict([(th.ident, th.name) for th in enumerate()])
    code = []
    for threadId, stack in sys._current_frames().items():
        code.append("\n# Thread: %s(%d)" % (id2name.get(threadId,""), threadId))
        for filename, lineno, name, line in traceback.extract_stack(stack):
            code.append('File: "%s", line %d, in %s' % (filename, lineno, name))
            if line:
                code.append("  %s" % (line.strip()))
    print "\n".join(code)

def signal_handler(signal, frame):
    logger.error("Got signal %i in %s/%s", signal, current_process().name, current_thread().name)
    if current_process().name == "RegExParser":
        # on Windows this isn't triggered, but it's fine, it has its own process termination thing
        raise SystemExit
    if "PoolWorker" in current_process().name:
        raise SystemExit
    if current_thread().name not in ("PyBitmessage", "MainThread"):
        return
    logger.error("Got signal %i", signal)
    if shared.thisapp.daemon:
        shutdown.doCleanShutdown()
    else:
        allThreadTraceback(frame)
        print 'Unfortunately you cannot use Ctrl+C when running the UI because the UI captures the signal.'

def isHostInPrivateIPRange(host):
    if ":" in host: #IPv6
        hostAddr = socket.inet_pton(socket.AF_INET6, host)
        if hostAddr == ('\x00' * 15) + '\x01':
            return False
        if hostAddr[0] == '\xFE' and (ord(hostAddr[1]) & 0xc0) == 0x80:
            return False
        if (ord(hostAddr[0]) & 0xfe) == 0xfc:
            return False
        pass
    elif ".onion" not in host:
        if host[:3] == '10.':
            return True
        if host[:4] == '172.':
            if host[6] == '.':
                if int(host[4:6]) >= 16 and int(host[4:6]) <= 31:
                    return True
        if host[:8] == '192.168.':
            return True
        # Multicast
        if host[:3] >= 224 and host[:3] <= 239 and host[4] == '.':
            return True
    return False

def addDataPadding(data, desiredMsgLength = 12, paddingChar = '\x00'):
    return data + paddingChar * (desiredMsgLength - len(data))