from miners.bosminer import BOSminer
from miners.bmminer import BMMiner
from miners.cgminer import CGMiner
from miners.btminer import BTMiner
from miners.unknown import UnknownMiner
from API import APIError
import asyncio
import ipaddress
import json

from settings import MINER_FACTORY_GET_VERSION_RETRIES as GET_VERSION_RETRIES


class MinerFactory:
    def __init__(self):
        self.miners = {}

    async def get_miner(self, ip: ipaddress.ip_address) -> BOSminer or CGMiner or BMMiner or UnknownMiner:
        """Decide a miner type using the IP address of the miner."""
        # check if the miner already exists in cache
        if ip in self.miners:
            return self.miners[ip]
        # get the version data
        version = None
        for i in range(GET_VERSION_RETRIES):
            version_data = await self._get_version_data(ip)
            if version_data:
                # if we got version data, get a list of the keys so we can check type of miner
                version = list(version_data['VERSION'][0].keys())
                break
        if version:
            # check version against different return miner types
            if "BOSminer" in version or "BOSminer+" in version:
                miner = BOSminer(str(ip))
            elif "CGMiner" in version:
                miner = CGMiner(str(ip))
            elif "BMMiner" in version:
                miner = BMMiner(str(ip))
            elif "BTMiner" in version:
                miner = BTMiner(str(ip))
            else:
                print(f"Bad API response: {version}")
                miner = UnknownMiner(str(ip))
        else:
            # if we don't get version, miner type is unknown
            print(f"No API response: {str(ip)}")
            miner = UnknownMiner(str(ip))
        # save the miner in cache
        self.miners[ip] = miner
        return miner

    def clear_cached_miners(self):
        """Clear the miner factory cache."""
        self.miners = {}

    @staticmethod
    async def _get_version_data(ip: ipaddress.ip_address) -> dict or None:
        """Get data on the version of the miner to return the right miner."""
        for i in range(3):
            try:
                # open a connection to the miner
                fut = asyncio.open_connection(str(ip), 4028)
                # get reader and writer streams
                try:
                    reader, writer = await asyncio.wait_for(fut, timeout=7)
                except asyncio.exceptions.TimeoutError:
                    return None

                # create the command
                cmd = {"command": "version"}

                # send the command
                writer.write(json.dumps(cmd).encode('utf-8'))
                await writer.drain()

                # instantiate data
                data = b""

                # loop to receive all the data
                while True:
                    d = await reader.read(4096)
                    if not d:
                        break
                    data += d

                if data.endswith(b"\x00"):
                    data = json.loads(data.decode('utf-8')[:-1])
                else:
                    # some stupid whatsminers need a different command
                    fut = asyncio.open_connection(str(ip), 4028)
                    # get reader and writer streams
                    try:
                        reader, writer = await asyncio.wait_for(fut, timeout=7)
                    except asyncio.exceptions.TimeoutError:
                        return None

                    # create the command
                    cmd = {"command": "get_version"}

                    # send the command
                    writer.write(json.dumps(cmd).encode('utf-8'))
                    await writer.drain()

                    # instantiate data
                    data = b""

                    # loop to receive all the data
                    while True:
                        d = await reader.read(4096)
                        if not d:
                            break
                        data += d

                    data = data.decode('utf-8').replace("\n", "")
                    data = json.loads(data)

                # close the connection
                writer.close()
                await writer.wait_closed()
                # check if the data returned is correct or an error
                # if status isn't a key, it is a multicommand
                if "STATUS" not in data.keys():
                    for key in data.keys():
                        # make sure not to try to turn id into a dict
                        if not key == "id":
                            # make sure they succeeded
                            if data[key][0]["STATUS"][0]["STATUS"] not in ["S", "I"]:
                                # this is an error
                                raise APIError(data["STATUS"][0]["Msg"])
                else:
                    # check for stupid whatsminer formatting
                    if not isinstance(data["STATUS"], list):
                        if data["STATUS"] not in ("S", "I"):
                            raise APIError(data["Msg"])
                        else:
                            if "whatsminer" in data["Description"]:
                                return {"VERSION": [{"BTMiner": data["Description"]}]}
                    # make sure the command succeeded
                    elif data["STATUS"][0]["STATUS"] not in ("S", "I"):
                        # this is an error
                        raise APIError(data["STATUS"][0]["Msg"])
                # return the data
                return data
            except OSError as e:
                if e.winerror == 121:
                    return None
                else:
                    print(ip, e)
            # except json.decoder.JSONDecodeError:
                # print("Decode Error @ " + str(ip) + str(data))
            # except Exception as e:
                # print(ip, e)
        return None