# -*- coding: utf-8 -*-
# @Time : 2023/7/20 16:10
# @Author : XuJiakai
# @File : async_pool
# @Software: PyCharm
import asyncio
import functools
import signal
import sys
from typing import Coroutine

from loguru import logger as log


class AsyncPool(object):
    def __init__(self, max_concurrency: int):
        self._semaphore: asyncio.Semaphore = asyncio.Semaphore(max_concurrency)
        self._running_task_num = 0

    async def create_task(self, coro: Coroutine) -> asyncio.Task:
        await self._semaphore.acquire()
        self._running_task_num += 1
        task: asyncio.Task = asyncio.create_task(coro)
        task.add_done_callback(lambda t: self._release(t))
        return task

    def is_done(self):
        return self._running_task_num == 0

    async def wait_all_done(self):
        while self._running_task_num > 0:
            log.info("running task num : {} , wait done...", self._running_task_num)
            await asyncio.sleep(1)

    def _release(self, t):
        self._running_task_num -= 1
        self._semaphore.release()


class GracefulExit(SystemExit):
    code = 1


class AsyncPoolListenShut:
    def __init__(self, max_concurrency: int):
        self._semaphore: asyncio.Semaphore = asyncio.Semaphore(max_concurrency)
        self._data: dict = {}
        self._look = False
        self._is_windows = sys.platform == 'win32'
        self._register_shutdown_by_signal()
        self._current_data = None

    def _register_shutdown_by_signal(self):
        print("注册shutdown")
        signal.signal(signal.SIGINT, functools.partial(self.listen_shutdown))
        signal.signal(signal.SIGTERM, functools.partial(self.listen_shutdown))
        pass

    async def create_task(self, coro: Coroutine, data) -> asyncio.Task:
        self._current_data = data
        if self._look:
            print("停止消费...")
            await asyncio.sleep(10000)
            pass
        await self._semaphore.acquire()
        task: asyncio.Task = asyncio.create_task(coro)
        print('创建task,id: ', id(task))
        self._data[task] = data
        task.add_done_callback(lambda t: self._release(t))

        return task
        pass

    def _release(self, t):
        print("释放task,id:", id(t))
        del self._data[t]
        self._semaphore.release()

    async def _shutdown(self):
        print("检测到停止信号...")
        # await self._look.acquire()
        count = len(self._data)
        print('当前数量%s' % count)
        num = 0
        while count > 0:
            num += 1

            print("\n第%s" % num)
            for t in self._data.keys():
                print(id(t), "是否结束", t.done())
                count -= 1 if t.done() else 0
            await asyncio.sleep(3)

        await asyncio.sleep(3)
        print("所有任务已经结束！")

    def listen_shutdown(self, *args, **kwargs):
        all_data = list(self._data.values()) + [self._current_data]
        print("all_data: ", all_data)
        self._look = True
        print("所有任务已经结束！")
        loop = asyncio.get_running_loop()
        tasks = asyncio.tasks.all_tasks(loop)
        for t in tasks:
            t.cancel()

        loop.stop()
        # raise GracefulExit()
        pass

    pass


async def run1(tt=None):
    print("sleeping")
    await asyncio.sleep(3)
    print("slept")
    if tt:
        print(tt)
    pass


async def callback(msg):
    print("callback")
    await asyncio.sleep(3)
    pass


async def main():
    pool = AsyncPool(5)
    for i in range(10):
        await pool.create_task(run1())
    await pool.wait_all_done()

    pass


if __name__ == '__main__':
    asyncio.run(main())
    pass