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#!/bin/env python

import os
import sys
import logging as log
import getopt
import atexit

from CanPktHandlerBase import CanPktHandlerBase
from CanPktHandler1 import CanPktHandler1

from NodeIfBase import NodeIfBase
from NodeIfCanStim import NodeIfCanStim
from NodeIfSerial import NodeIfSerial

from DaemonConfig import DaemonConfig

daemonApp = None

class CanDaemon():
    
    nodeIf = None
    
    def __init__ (self):
        pass
    
    
    def usage(self):
        pass
    
    
    def helpCommands(self):
        print 'quit, exit     : shutdown CanDaemon'
        print 'help           : display help'
    
    
    def exitHelper(self):
        if self.nodeIf is not None:
            self.nodeIf.stop()
    
    
    def exceptHelper(self, type, value, tb):
       if hasattr(sys, 'ps1') or not sys.stderr.isatty():
          # we are in interactive mode or we don't have a tty-like
          # device, so we call the default hook
          sys.__excepthook__(type, value, tb)
       else:
          import traceback, pdb
          # we are NOT in interactive mode, print the exception...
          traceback.print_exception(type, value, tb)
          print 'ERROR ERROR ERROR'
          self.exitHelper()
          
          
#    def install_thread_excepthook(self):
#        """Workaround for sys.excepthook thread bug
#           (https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1230540&group_id=5470).
#           Call once from __main__ before creating any threads.
#           If using psyco, call psyco.cannotcompile(threading.Thread.run)
#           since this replaces a new-style class method.
#        """
#        import sys, threading
#        run_old = threading.Thread.run
#        def run(*args, **kwargs):
#            try:
#                run_old(*args, **kwargs)
#            except (KeyboardInterrupt, SystemExit):
#                raise
#            except:
#                sys.excepthook(*sys.exc_info())
#        threading.Thread.run = run
        
    
    def run(self):
        try:
            demoPath = os.path.dirname(__file__)
            os.chdir(demoPath)
        except:
            return
        
        print 'Start logging'
        log.basicConfig(level=log.DEBUG)
        
        print 'Get config options from command line or config file'
        cfg = DaemonConfig()
        
        try:
            opts, args = getopt.getopt(sys.argv[1:], "ho:v", ["help", "output="])
        except getopt.GetoptError:
            print 'Invalid usage'
            usage()
            sys.exit(2)
     #   output = None
     #   verbose = False
        for o, a in opts:
            if o == "-v":
                pass
     #           verbose = True
            if o in ("-h", "--help"):
                usage()
                sys.exit()
            if o in ("-o", "--output"):
                pass
    #            output = a
    
        print 'Init and load filters and spaces'
    #    cfg.filterCfg.importFilter('DefaultFilter')
    #    cfg.stateSpaceCfg.importSpace('DefaultStateSpace')
        cfg.stateSpaceCfg.loadSpaces()
        cfg.filterCfg.loadFilters()
        cfg.setupFilterBindings()
        cfg.setupFilterChain()
          
        print 'Start selected can interface'
        ''' nodeif thread launch '''
        pktHandler = CanPktHandler1(cfg)
        
     #   cfg = NodeIfCanStim.DEFAULT_CONFIG
     #   nodeif = NodeIfCanStim(cfg, pkthandler)
        ifConfig = NodeIfSerial.DEFAULT_CONFIG
    
        self.nodeIf = NodeIfSerial(pktHandler, self.exceptHelper, ifConfig)
        
        if not self.nodeIf.start():
            print 'FATAL: Failed to initialize node interface'
            sys.exit(-1)
        else:
            atexit.register(self.exitHelper)
            sys.excepthook = self.exceptHelper

        print 'Initialize/gather info on connected can nodes and load associated state'
        print 'Start selected TCP and UDP server(s)'
        # server threads launch
        
        print 'CanDaemon v1 ready'
        print 'Enter command or type \"help\" for a list of commands'
        terminated = False
        while not terminated:
            input = raw_input('> ').strip().lower()
            if input == 'quit' or input == 'exit':
                terminated = True
            elif input == 'help':
                helpCommands()
        
        print 'Shutdown'
        self.nodeIf.stop()
        cfg.stateSpaceCfg.saveSpaces()
        cfg.filterCfg.saveFilters()

#---------------------------------------------------------------------------

def main():
    daemonApp = CanDaemon()
#    daemon.install_thread_excepthook()
    daemonApp.run()

#---------------------------------------------------------------------------

if __name__ == '__main__':
    __name__ = 'Main'
    main()