import csv
import logging
import sys
from typing import Any, Dict, List, Union

import rapidjson
from colorama import Fore, Style
from colorama import init as colorama_init
from tabulate import tabulate

from freqtrade.configuration import setup_utils_configuration
from freqtrade.enums import RunMode
from freqtrade.exceptions import ConfigurationError, OperationalException
from freqtrade.exchange import list_available_exchanges, market_is_active
from freqtrade.misc import parse_db_uri_for_logging, plural
from freqtrade.resolvers import ExchangeResolver, StrategyResolver
from freqtrade.types import ValidExchangesType


logger = logging.getLogger(__name__)


def start_list_exchanges(args: Dict[str, Any]) -> None:
    """
    Print available exchanges
    :param args: Cli args from Arguments()
    :return: None
    """
    exchanges = list_available_exchanges(args["list_exchanges_all"])

    if args["print_one_column"]:
        print("\n".join([e["name"] for e in exchanges]))
    else:
        headers = {
            "name": "Exchange name",
            "supported": "Supported",
            "trade_modes": "Markets",
            "comment": "Reason",
        }
        headers.update({"valid": "Valid"} if args["list_exchanges_all"] else {})

        def build_entry(exchange: ValidExchangesType, valid: bool):
            valid_entry = {"valid": exchange["valid"]} if valid else {}
            result: Dict[str, Union[str, bool]] = {
                "name": exchange["name"],
                **valid_entry,
                "supported": "Official" if exchange["supported"] else "",
                "trade_modes": ", ".join(
                    (f"{a['margin_mode']} " if a["margin_mode"] else "") + a["trading_mode"]
                    for a in exchange["trade_modes"]
                ),
                "comment": exchange["comment"],
            }

            return result

        if args["list_exchanges_all"]:
            print("All exchanges supported by the ccxt library:")
            exchanges = [build_entry(e, True) for e in exchanges]
        else:
            print("Exchanges available for Freqtrade:")
            exchanges = [build_entry(e, False) for e in exchanges if e["valid"] is not False]

        print(
            tabulate(
                exchanges,
                headers=headers,
            )
        )


def _print_objs_tabular(objs: List, print_colorized: bool) -> None:
    if print_colorized:
        colorama_init(autoreset=True)
        red = Fore.RED
        yellow = Fore.YELLOW
        reset = Style.RESET_ALL
    else:
        red = ""
        yellow = ""
        reset = ""

    names = [s["name"] for s in objs]
    objs_to_print = [
        {
            "name": s["name"] if s["name"] else "--",
            "location": s["location_rel"],
            "status": (
                red + "LOAD FAILED" + reset
                if s["class"] is None
                else "OK"
                if names.count(s["name"]) == 1
                else yellow + "DUPLICATE NAME" + reset
            ),
        }
        for s in objs
    ]
    for idx, s in enumerate(objs):
        if "hyperoptable" in s:
            objs_to_print[idx].update(
                {
                    "hyperoptable": "Yes" if s["hyperoptable"]["count"] > 0 else "No",
                    "buy-Params": len(s["hyperoptable"].get("buy", [])),
                    "sell-Params": len(s["hyperoptable"].get("sell", [])),
                }
            )
    print(tabulate(objs_to_print, headers="keys", tablefmt="psql", stralign="right"))


def start_list_strategies(args: Dict[str, Any]) -> None:
    """
    Print files with Strategy custom classes available in the directory
    """
    config = setup_utils_configuration(args, RunMode.UTIL_NO_EXCHANGE)

    strategy_objs = StrategyResolver.search_all_objects(
        config, not args["print_one_column"], config.get("recursive_strategy_search", False)
    )
    # Sort alphabetically
    strategy_objs = sorted(strategy_objs, key=lambda x: x["name"])
    for obj in strategy_objs:
        if obj["class"]:
            obj["hyperoptable"] = obj["class"].detect_all_parameters()
        else:
            obj["hyperoptable"] = {"count": 0}

    if args["print_one_column"]:
        print("\n".join([s["name"] for s in strategy_objs]))
    else:
        _print_objs_tabular(strategy_objs, config.get("print_colorized", False))


def start_list_freqAI_models(args: Dict[str, Any]) -> None:
    """
    Print files with FreqAI models custom classes available in the directory
    """
    config = setup_utils_configuration(args, RunMode.UTIL_NO_EXCHANGE)
    from freqtrade.resolvers.freqaimodel_resolver import FreqaiModelResolver

    model_objs = FreqaiModelResolver.search_all_objects(config, not args["print_one_column"])
    # Sort alphabetically
    model_objs = sorted(model_objs, key=lambda x: x["name"])
    if args["print_one_column"]:
        print("\n".join([s["name"] for s in model_objs]))
    else:
        _print_objs_tabular(model_objs, config.get("print_colorized", False))


def start_list_timeframes(args: Dict[str, Any]) -> None:
    """
    Print timeframes available on Exchange
    """
    config = setup_utils_configuration(args, RunMode.UTIL_EXCHANGE)
    # Do not use timeframe set in the config
    config["timeframe"] = None

    # Init exchange
    exchange = ExchangeResolver.load_exchange(config, validate=False)

    if args["print_one_column"]:
        print("\n".join(exchange.timeframes))
    else:
        print(
            f"Timeframes available for the exchange `{exchange.name}`: "
            f"{', '.join(exchange.timeframes)}"
        )


def start_list_markets(args: Dict[str, Any], pairs_only: bool = False) -> None:
    """
    Print pairs/markets on the exchange
    :param args: Cli args from Arguments()
    :param pairs_only: if True print only pairs, otherwise print all instruments (markets)
    :return: None
    """
    config = setup_utils_configuration(args, RunMode.UTIL_EXCHANGE)

    # Init exchange
    exchange = ExchangeResolver.load_exchange(config, validate=False)

    # By default only active pairs/markets are to be shown
    active_only = not args.get("list_pairs_all", False)

    base_currencies = args.get("base_currencies", [])
    quote_currencies = args.get("quote_currencies", [])

    try:
        pairs = exchange.get_markets(
            base_currencies=base_currencies,
            quote_currencies=quote_currencies,
            tradable_only=pairs_only,
            active_only=active_only,
        )
        # Sort the pairs/markets by symbol
        pairs = dict(sorted(pairs.items()))
    except Exception as e:
        raise OperationalException(f"Cannot get markets. Reason: {e}") from e

    else:
        summary_str = (
            (f"Exchange {exchange.name} has {len(pairs)} ")
            + ("active " if active_only else "")
            + (plural(len(pairs), "pair" if pairs_only else "market"))
            + (
                f" with {', '.join(base_currencies)} as base "
                f"{plural(len(base_currencies), 'currency', 'currencies')}"
                if base_currencies
                else ""
            )
            + (" and" if base_currencies and quote_currencies else "")
            + (
                f" with {', '.join(quote_currencies)} as quote "
                f"{plural(len(quote_currencies), 'currency', 'currencies')}"
                if quote_currencies
                else ""
            )
        )

        headers = [
            "Id",
            "Symbol",
            "Base",
            "Quote",
            "Active",
            "Spot",
            "Margin",
            "Future",
            "Leverage",
        ]

        tabular_data = [
            {
                "Id": v["id"],
                "Symbol": v["symbol"],
                "Base": v["base"],
                "Quote": v["quote"],
                "Active": market_is_active(v),
                "Spot": "Spot" if exchange.market_is_spot(v) else "",
                "Margin": "Margin" if exchange.market_is_margin(v) else "",
                "Future": "Future" if exchange.market_is_future(v) else "",
                "Leverage": exchange.get_max_leverage(v["symbol"], 20),
            }
            for _, v in pairs.items()
        ]

        if (
            args.get("print_one_column", False)
            or args.get("list_pairs_print_json", False)
            or args.get("print_csv", False)
        ):
            # Print summary string in the log in case of machine-readable
            # regular formats.
            logger.info(f"{summary_str}.")
        else:
            # Print empty string separating leading logs and output in case of
            # human-readable formats.
            print()

        if pairs:
            if args.get("print_list", False):
                # print data as a list, with human-readable summary
                print(f"{summary_str}: {', '.join(pairs.keys())}.")
            elif args.get("print_one_column", False):
                print("\n".join(pairs.keys()))
            elif args.get("list_pairs_print_json", False):
                print(rapidjson.dumps(list(pairs.keys()), default=str))
            elif args.get("print_csv", False):
                writer = csv.DictWriter(sys.stdout, fieldnames=headers)
                writer.writeheader()
                writer.writerows(tabular_data)
            else:
                # print data as a table, with the human-readable summary
                print(f"{summary_str}:")
                print(tabulate(tabular_data, headers="keys", tablefmt="psql", stralign="right"))
        elif not (
            args.get("print_one_column", False)
            or args.get("list_pairs_print_json", False)
            or args.get("print_csv", False)
        ):
            print(f"{summary_str}.")


def start_show_trades(args: Dict[str, Any]) -> None:
    """
    Show trades
    """
    import json

    from freqtrade.persistence import Trade, init_db

    config = setup_utils_configuration(args, RunMode.UTIL_NO_EXCHANGE)

    if "db_url" not in config:
        raise ConfigurationError("--db-url is required for this command.")

    logger.info(f'Using DB: "{parse_db_uri_for_logging(config["db_url"])}"')
    init_db(config["db_url"])
    tfilter = []

    if config.get("trade_ids"):
        tfilter.append(Trade.id.in_(config["trade_ids"]))

    trades = Trade.get_trades(tfilter).all()
    logger.info(f"Printing {len(trades)} Trades: ")
    if config.get("print_json", False):
        print(json.dumps([trade.to_json() for trade in trades], indent=4))
    else:
        for trade in trades:
            print(trade)