from websockets import *
from TimeWaster import *
import asyncio, json, signal, sys, time, random, subprocess, os

class WebSocketServer:
    server: Server = None

    def __init__(self) -> None:
        asyncio.run(self.main())
    
    async def main(self) -> None:
        async with serve(self.handleConnection, "", 8765) as sv:
            self.server = sv
            loop: asyncio.AbstractEventLoop = asyncio.get_running_loop()
            loop.add_signal_handler(signal.SIGTERM, self.closeServer)
            loop.add_reader(0, self.serverController)
            await self.server.wait_closed()
    
    async def handleConnection(self, connection: ServerConnection) -> None: #TODO: Make this actually do something
        print(f"{connection.remote_address} Connected")
        worker: asyncio.subprocess.Process = await asyncio.create_subprocess_exec("python3", "-u", "TimeWaster.py", stdin=asyncio.subprocess.PIPE, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE)
        connected: bool = True
        asyncio.create_task(self.sendResponse(worker, connection))
        asyncio.create_task(self.readErr(worker))
        while (connected):
            raw: str = await connection.recv()
            print(f"Got data: {raw}")
            worker.send_signal(signal.SIGUSR1) #Cancel any existing jobs
            worker.stdin.write(f"{raw}<END>".encode())
            await worker.stdin.drain()
            print(f"Wrote data")
    
    async def sendResponse(self, proc: asyncio.subprocess.Process, connection: ServerConnection):
        while (True):
            print("Running sendResponse")
            data = (await proc.stdout.readuntil("<END>".encode()))[:-5]
            print(f"Read \"{data.decode()}\"")
            # await self.respond(data, connection)
            task = asyncio.create_task(self.respond(data, connection))
    
    async def readErr(self, proc: asyncio.subprocess.Process):
        data = await proc.stderr.read()
        print(f"ERROR: {data.decode()}")
        exit(1)

    async def respond(self, raw: str, connection: ServerConnection) -> None:
        message = json.loads(raw)
        print(f"Received: \'{message["result"]}\' with id \'{message["ID"]}\'")
        await asyncio.sleep(random.randrange(1, 10) / 10)
        response = {"ID": message["ID"], "message": f"received: {message["result"]}"}
        await connection.send(json.dumps(response))
        print("Server replied")
    
    def serverController(self) -> None: #TODO: Make ways of actually controlling the server with this
        print("Server controller. Now die")
        print(sys.stdin.readline())
        self.closeServer()

    def closeServer(self) -> None:
        print("Closing down")
        self.server.close()

if __name__ == "__main__":
    WebSocketServer()
    print("see ya suckers")