# This file is part of DarkFi (https://dark.fi)
#
# Copyright (C) 2020-2023 Dyne.org foundation
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
import asyncio, json, random, sys, time


class JsonRpc:

    async def start(self, server, port):
        reader, writer = await asyncio.open_connection(server, port)
        self.reader = reader
        self.writer = writer

    async def stop(self):
        self.writer.close()
        await self.writer.wait_closed()

    async def _make_request(self, method, params):
        ident = random.randint(0, 2**16)
        print(ident)
        request = {
            "jsonrpc": "2.0",
            "method": method,
            "params": params,
            "id": ident,
        }

        message = json.dumps(request) + "\n"
        self.writer.write(message.encode())
        await self.writer.drain()

        data = await self.reader.readline()
        message = data.decode().strip()
        response = json.loads(message)
        print(response)
        return response

    async def _subscribe(self, method, params):
        ident = random.randint(0, 2**16)
        request = {
            "jsonrpc": "2.0",
            "method": method,
            "params": params,
            "id": ident,
        }

        message = json.dumps(request) + "\n"
        self.writer.write(message.encode())
        await self.writer.drain()
        print("Subscribed")

    async def ping(self):
        return await self._make_request("ping", [])

    async def dnet_switch(self, state):
        return await self._make_request("dnet.switch", [state])

    async def dnet_subscribe_events(self):
        return await self._subscribe("dnet.subscribe_events", [])


async def main(argv):
    rpc = JsonRpc()
    while True:
        try:
            await rpc.start("localhost", 26660)
            break
        except OSError:
            pass
    await rpc.dnet_switch(True)
    await rpc.dnet_subscribe_events()

    while True:
        data = await rpc.reader.readline()
        #with open("rpclog", "a") as f:
        #    f.write(data.decode())
        data = json.loads(data)

        params = data["params"][0]
        ev = params["event"]
        if ev in ["send", "recv"]:
            continue
        info = params["info"]
        if ev.startswith("outbound_slot"):
            slot = info["slot"]

            t = time.localtime()
            current_time = time.strftime("%H:%M:%S", t)
            ev = ev[len("outbound_slot_"):]
            print(f"{current_time}  slot {slot}: {ev}")
        else:
            assert ev == "outbound_peer_discovery"
            attempt = info["attempt"]
            state = info["state"]
            print(f"{current_time}  peer_discovery: {state} (attempt {attempt})")
        #print(data)

    await rpc.dnet_switch(False)
    await rpc.stop()


asyncio.run(main(sys.argv))