#!/usr/bin/env pyston3

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

from decimal import Decimal

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

# We explicitly want argument parsing to be outside the main try-except block because some arguments
# (like --help) will cause an exit, which our except: block traps.
parser = argparse.ArgumentParser(description="Buys one of the tokens in a Mango Markets group.")
mango.Context.add_context_command_line_parameters(parser)
parser.add_argument("--id-file", type=str, default="id.json",
                    help="file containing the JSON-formatted wallet private key")
parser.add_argument("--token-data-file", type=str, default="solana.tokenlist.json",
                    help="data file that contains token symbols, names, mints and decimals (format is same as https://raw.githubusercontent.com/solana-labs/token-list/main/src/tokens/solana.tokenlist.json)")
parser.add_argument("--log-level", default=logging.INFO, type=lambda level: getattr(logging, level),
                    help="level of verbosity to log (possible values: DEBUG, INFO, WARNING, ERROR, CRITICAL)")
parser.add_argument("--symbol", type=str, required=True, help="market symbol to buy (e.g. ETH/USDC)")
parser.add_argument("--quantity", type=Decimal, required=True, help="quantity of token to buy")
parser.add_argument("--adjustment-factor", type=Decimal, default=Decimal("0.05"),
                    help="factor by which to adjust the BUY price (akin to maximum slippage)")
parser.add_argument("--wait", action="store_true", default=False,
                    help="wait until the transaction is confirmed")
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:
    id_filename = args.id_file
    if not os.path.isfile(id_filename):
        logging.error(f"Wallet file '{id_filename}' is not present.")
        sys.exit(1)
    wallet = mango.Wallet.load(id_filename)
    adjustment_factor = args.adjustment_factor
    context = mango.Context.from_context_command_line_parameters(args)

    logging.info(f"Context: {context}")
    logging.info(f"Wallet address: {wallet.address}")

    symbol = args.symbol.upper()

    if args.dry_run:
        trade_executor: mango.TradeExecutor = mango.NullTradeExecutor()
    else:
        with open(args.token_data_file) as json_file:
            token_data = json.load(json_file)
            spot_market_lookup = mango.SpotMarketLookup(token_data)
        trade_executor = mango.SerumImmediateTradeExecutor(context, wallet, spot_market_lookup, adjustment_factor)

    transaction_id = trade_executor.buy(symbol, args.quantity)
    if args.wait:
        logging.info(f"Waiting on {transaction_id}")
        context.wait_for_confirmation(transaction_id)

    logging.info("Buy completed.")
except Exception as exception:
    logging.critical(f"Buy stopped because of exception: {exception} - {traceback.format_exc()}")
except:
    logging.critical(f"Buy stopped because of uncatchable error: {traceback.format_exc()}")