import threading
import queue
import time
import traceback

import ctypes
import inspect
import sys,os
from multiprocessing import Process,Queue

import logging
logging.basicConfig(level = logging.INFO,format = '%(asctime)s - %(name)s - %(levelname)s - %(message)s')


def _async_raise(tid, exctype):
    """raises the exception, performs cleanup if needed"""
    tid = ctypes.c_long(tid)
    if not inspect.isclass(exctype):
        exctype = type(exctype)
    res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
    if res == 0:
        raise ValueError("invalid thread id")
    elif res != 1:
        ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)
        raise SystemError("PyThreadState_SetAsyncExc failed")

def stop_thread(thread):
    _async_raise(thread.ident, SystemExit)



class _taskHandler(threading.Thread):

    def __init__(self,task_queue,task_handler,result_queue,need_stop=True,timeout=60,*args,**kwargs):
        threading.Thread.__init__(self)
        # Process.__init__(self)
        self.task_queue = task_queue
        self.task_handler = task_handler
        self.result_queue = result_queue
        self.need_stop = need_stop
        self.args = args
        self.kwargs = kwargs
        self.timeout= timeout

    def run(self):
        while(True):
            try:
                logging.info("%s - handler task queue size is %d need_stop %s thread_id:%d-%d"%(self.task_handler.__name__, self.task_queue.qsize(),str(self.need_stop),os.getpid(),threading.get_ident()))
                item = self.task_queue.get(True,timeout=5)

                self.task_handler(item,self.result_queue,*self.args,**self.kwargs)

                # t = threading.Thread(target=self.task_handler,args=(item,self.result_queue,*self.args,self.kwargs))
                # t.start()
                # start_time = time.time()
                # while 1:
                #     if  not t.is_alive():
                #         break
                #     if time.time()-start_time>self.timeout:
                #         logging.info("thread %d run to long time ,killed"%(threading.get_ident()))
                #         stop_thread(t)
                #         break
                #     time.sleep(0.1)

                # self.task_queue.task_done()
            except queue.Empty as e:
                # logging.info("%s thread is done"%(self.name))
                if self.need_stop and self.task_queue.empty():
                    break
            except Exception as e:
                logging.info("error: %s"%(e))
                traceback.print_exc()

class MultiThreadHandler(object):

    def __init__(self,task_queue,task_handler,result_queue,thread_count=1,process_count=1,need_stop=True,restart=False,timeout=60,*args,**kwargs):
        self.task_queue = task_queue
        self.task_handler = task_handler
        self.result_queue = result_queue
        self.list_thread = []
        self.thread_count = thread_count
        self.process_count = process_count
        self.args = args
        self.kwargs = kwargs
        self.restart = restart
        self.need_stop = need_stop
        self.timeout = timeout

    def getThreadStatus(self):
        _count = 0
        restart = 0
        for _t in self.list_thread:
            if _t.is_alive():
                _count += 1
            else:
                if self.restart:
                    _t = _taskHandler(self.task_queue,self.task_handler,self.result_queue,self.need_stop,self.timeout,*self.args,**self.kwargs)
                    _t.start()
                    restart += 1
        logging.debug("thread status alive:%d restart:%d total:%d need_stop %s"%(_count,restart,len(self.list_thread),str(self.need_stop)))
        return _count,restart,len(self.list_thread)

    def run(self):

        self.list_thread = []
        for i in range(self.thread_count):
            th = _taskHandler(self.task_queue,self.task_handler,self.result_queue,self.need_stop,*self.args,**self.kwargs)
            # th.setDaemon(True)
            self.list_thread.append(th)

        for th in self.list_thread:
            th.start()

        while(not self._check_all_done()):
            try:
                time.sleep(1)
                _,_restart,_count = self.getThreadStatus()
                if _count==0:
                    if self.task_queue.qsize()==0:
                        break
                    else:
                        self.restart = True
                        _,_restart,_count = self.getThreadStatus()
                # if _count==_restart and self.task_queue.qsize()==0:
                #     break
                # �����ֶ�ֹͣ
                # _quit = False
                # line = sys.stdin.readline()
                # if line.strip()=="quit":
                #     _quit = True
                # if _quit:
                #     break
            except KeyboardInterrupt:
                print("interrupted by keyboard")
                self.stop_all()
                break
        print("the whole task is done")



    def _check_all_done(self):
        if not self.need_stop:
            return False

        bool_done = True
        for th in self.list_thread:
            if th.isAlive():
                bool_done = False
        return bool_done

    def stop_all(self):
        for th in self.list_thread:
            if th.isAlive:
                stop_thread(th)

def test_handler(item,result_queue):
    print(item)

if __name__=="__main__":
    task_queue = queue.Queue()
    result_queue = queue.Queue()
    for i in range(100):
        task_queue.put(i)
    a = MultiThreadHandler(task_queue=task_queue,task_handler=test_handler,result_queue=result_queue,thread_count=3)
    a.run()