#!/usr/bin/env pyston3

import argparse
import logging
import os
import os.path
import sys
import traceback

from datetime import timedelta
from decimal import Decimal
from threading import Thread

sys.path.insert(0, os.path.abspath(
    os.path.join(os.path.dirname(__file__), '..')))
import mango  # nopep8
import mango.marketmaking.simplemarketmaker  # nopep8

parser = argparse.ArgumentParser(description="Runs a simple market-maker.")
mango.Context.add_command_line_parameters(parser)
mango.Wallet.add_command_line_parameters(parser)
parser.add_argument("--market", type=str, required=True, help="market symbol to buy (e.g. ETH/USDC)")
parser.add_argument("--spread-ratio", type=Decimal, required=True,
                    help="fraction of the mid price to be added and subtracted to calculate buy and sell prices")
parser.add_argument("--position-size-ratio", type=Decimal, required=True,
                    help="fraction of the token inventory to be bought or sold in each order")
parser.add_argument("--existing-order-tolerance", type=Decimal, default=Decimal("0.0001"),
                    help="fraction of the token inventory to be bought or sold in each order")
parser.add_argument("--pause-duration", type=int, default=10,
                    help="number of seconds to pause between placing orders and cancelling them")
parser.add_argument("--dry-run", action="store_true", default=False,
                    help="runs as read-only and does not perform any transactions")
args = parser.parse_args()

logging.getLogger().setLevel(args.log_level)
logging.warning(mango.WARNING_DISCLAIMER_TEXT)

try:
    context = mango.Context.from_command_line_parameters(args)
    wallet = mango.Wallet.from_command_line_parameters_or_raise(args)

    market_symbol = args.market.upper()
    market = context.market_lookup.find_by_symbol(market_symbol)
    if market is None:
        raise Exception(f"Could not find spot market {market_symbol}")

    order_placer: mango.OrderPlacer
    if args.dry_run:
        order_placer = mango.NullOrderPlacer(market_symbol, print)
    elif isinstance(market, mango.SpotMarket):
        order_placer = mango.SerumOrderPlacer(context, wallet, market, print)
    else:
        raise Exception(f"Could not find order placer for market {market_symbol}")

    oracle_provider: mango.OracleProvider = mango.create_oracle_provider("serum")
    oracle = oracle_provider.oracle_for_market(context, market)
    if oracle is None:
        raise Exception(f"Could not find oracle for spot market {market_symbol}")

    pause_duration = timedelta(seconds=args.pause_duration)
    market_maker = mango.marketmaking.simplemarketmaker.SimpleMarketMaker(
        context, wallet, market, order_placer, oracle, args.spread_ratio, args.position_size_ratio, args.existing_order_tolerance, pause_duration)

    print(f"Starting {market_maker} - use <Enter> to stop.")
    thread = Thread(target=market_maker.start)
    thread.start()

    input()
    print(f"Stopping {market_maker} on next iteration...")
    market_maker.stop()
except Exception as exception:
    logging.critical(f"Market maker stopped because of exception: {exception} - {traceback.format_exc()}")
except:
    logging.critical(f"Market maker stopped because of uncatchable error: {traceback.format_exc()}")