"""
This module contains the argument manager class
"""
import argparse
from functools import partial
from pathlib import Path
from typing import Any, Dict, List, Optional

from freqtrade.commands.cli_options import AVAILABLE_CLI_OPTIONS
from freqtrade.constants import DEFAULT_CONFIG


ARGS_COMMON = ["verbosity", "logfile", "version", "config", "datadir", "user_data_dir"]

ARGS_STRATEGY = ["strategy", "strategy_path"]

ARGS_TRADE = ["db_url", "sd_notify", "dry_run", "dry_run_wallet", "fee"]

ARGS_COMMON_OPTIMIZE = ["timeframe", "timerange", "dataformat_ohlcv",
                        "max_open_trades", "stake_amount", "fee"]

ARGS_BACKTEST = ARGS_COMMON_OPTIMIZE + ["position_stacking", "use_max_market_positions",
                                        "enable_protections", "dry_run_wallet",
                                        "strategy_list", "export", "exportfilename"]

ARGS_HYPEROPT = ARGS_COMMON_OPTIMIZE + ["hyperopt", "hyperopt_path",
                                        "position_stacking", "use_max_market_positions",
                                        "enable_protections", "dry_run_wallet",
                                        "epochs", "spaces", "print_all",
                                        "print_colorized", "print_json", "hyperopt_jobs",
                                        "hyperopt_random_state", "hyperopt_min_trades",
                                        "hyperopt_loss"]

ARGS_EDGE = ARGS_COMMON_OPTIMIZE + ["stoploss_range"]

ARGS_LIST_STRATEGIES = ["strategy_path", "print_one_column", "print_colorized"]

ARGS_LIST_HYPEROPTS = ["hyperopt_path", "print_one_column", "print_colorized"]

ARGS_LIST_EXCHANGES = ["print_one_column", "list_exchanges_all"]

ARGS_LIST_TIMEFRAMES = ["exchange", "print_one_column"]

ARGS_LIST_PAIRS = ["exchange", "print_list", "list_pairs_print_json", "print_one_column",
                   "print_csv", "base_currencies", "quote_currencies", "list_pairs_all"]

ARGS_TEST_PAIRLIST = ["verbosity", "config", "quote_currencies", "print_one_column",
                      "list_pairs_print_json"]

ARGS_CREATE_USERDIR = ["user_data_dir", "reset"]

ARGS_BUILD_CONFIG = ["config"]

ARGS_BUILD_STRATEGY = ["user_data_dir", "strategy", "template"]

ARGS_BUILD_HYPEROPT = ["user_data_dir", "hyperopt", "template"]

ARGS_CONVERT_DATA = ["pairs", "format_from", "format_to", "erase"]
ARGS_CONVERT_DATA_OHLCV = ARGS_CONVERT_DATA + ["timeframes"]

ARGS_LIST_DATA = ["exchange", "dataformat_ohlcv", "pairs"]

ARGS_DOWNLOAD_DATA = ["pairs", "pairs_file", "days", "timerange", "download_trades", "exchange",
                      "timeframes", "erase", "dataformat_ohlcv", "dataformat_trades"]

ARGS_PLOT_DATAFRAME = ["pairs", "indicators1", "indicators2", "plot_limit",
                       "db_url", "trade_source", "export", "exportfilename",
                       "timerange", "timeframe", "no_trades"]

ARGS_PLOT_PROFIT = ["pairs", "timerange", "export", "exportfilename", "db_url",
                    "trade_source", "timeframe"]

ARGS_INSTALL_UI = ["erase_ui_only"]

ARGS_SHOW_TRADES = ["db_url", "trade_ids", "print_json"]

ARGS_HYPEROPT_LIST = ["hyperopt_list_best", "hyperopt_list_profitable",
                      "hyperopt_list_min_trades", "hyperopt_list_max_trades",
                      "hyperopt_list_min_avg_time", "hyperopt_list_max_avg_time",
                      "hyperopt_list_min_avg_profit", "hyperopt_list_max_avg_profit",
                      "hyperopt_list_min_total_profit", "hyperopt_list_max_total_profit",
                      "hyperopt_list_min_objective", "hyperopt_list_max_objective",
                      "print_colorized", "print_json", "hyperopt_list_no_details",
                      "hyperoptexportfilename", "export_csv"]

ARGS_HYPEROPT_SHOW = ["hyperopt_list_best", "hyperopt_list_profitable", "hyperopt_show_index",
                      "print_json", "hyperoptexportfilename", "hyperopt_show_no_header"]

NO_CONF_REQURIED = ["convert-data", "convert-trade-data", "download-data", "list-timeframes",
                    "list-markets", "list-pairs", "list-strategies", "list-data",
                    "list-hyperopts", "hyperopt-list", "hyperopt-show",
                    "plot-dataframe", "plot-profit", "show-trades"]

NO_CONF_ALLOWED = ["create-userdir", "list-exchanges", "new-hyperopt", "new-strategy"]


class Arguments:
    """
    Arguments Class. Manage the arguments received by the cli
    """

    def __init__(self, args: Optional[List[str]]) -> None:
        self.args = args
        self._parsed_arg: Optional[argparse.Namespace] = None

    def get_parsed_arg(self) -> Dict[str, Any]:
        """
        Return the list of arguments
        :return: List[str] List of arguments
        """
        if self._parsed_arg is None:
            self._build_subcommands()
            self._parsed_arg = self._parse_args()

        return vars(self._parsed_arg)

    def _parse_args(self) -> argparse.Namespace:
        """
        Parses given arguments and returns an argparse Namespace instance.
        """
        parsed_arg = self.parser.parse_args(self.args)

        # Workaround issue in argparse with action='append' and default value
        # (see https://bugs.python.org/issue16399)
        # Allow no-config for certain commands (like downloading / plotting)
        if ('config' in parsed_arg and parsed_arg.config is None):
            conf_required = ('command' in parsed_arg and parsed_arg.command in NO_CONF_REQURIED)

            if 'user_data_dir' in parsed_arg and parsed_arg.user_data_dir is not None:
                user_dir = parsed_arg.user_data_dir
            else:
                # Default case
                user_dir = 'user_data'
                # Try loading from "user_data/config.json"
            cfgfile = Path(user_dir) / DEFAULT_CONFIG
            if cfgfile.is_file():
                parsed_arg.config = [str(cfgfile)]
            else:
                # Else use "config.json".
                cfgfile = Path.cwd() / DEFAULT_CONFIG
                if cfgfile.is_file() or not conf_required:
                    parsed_arg.config = [DEFAULT_CONFIG]

        return parsed_arg

    def _build_args(self, optionlist, parser):

        for val in optionlist:
            opt = AVAILABLE_CLI_OPTIONS[val]
            parser.add_argument(*opt.cli, dest=val, **opt.kwargs)

    def _build_subcommands(self) -> None:
        """
        Builds and attaches all subcommands.
        :return: None
        """
        # Build shared arguments (as group Common Options)
        _common_parser = argparse.ArgumentParser(add_help=False)
        group = _common_parser.add_argument_group("Common arguments")
        self._build_args(optionlist=ARGS_COMMON, parser=group)

        _strategy_parser = argparse.ArgumentParser(add_help=False)
        strategy_group = _strategy_parser.add_argument_group("Strategy arguments")
        self._build_args(optionlist=ARGS_STRATEGY, parser=strategy_group)

        # Build main command
        self.parser = argparse.ArgumentParser(description='Free, open source crypto trading bot')
        self._build_args(optionlist=['version'], parser=self.parser)

        from freqtrade.commands import (start_backtesting, start_convert_data, start_create_userdir,
                                        start_download_data, start_edge, start_hyperopt,
                                        start_hyperopt_list, start_hyperopt_show, start_install_ui,
                                        start_list_data, start_list_exchanges, start_list_hyperopts,
                                        start_list_markets, start_list_strategies,
                                        start_list_timeframes, start_new_config, start_new_hyperopt,
                                        start_new_strategy, start_plot_dataframe, start_plot_profit,
                                        start_show_trades, start_test_pairlist, start_trading)

        subparsers = self.parser.add_subparsers(dest='command',
                                                # Use custom message when no subhandler is added
                                                # shown from `main.py`
                                                # required=True
                                                )

        # Add trade subcommand
        trade_cmd = subparsers.add_parser('trade', help='Trade module.',
                                          parents=[_common_parser, _strategy_parser])
        trade_cmd.set_defaults(func=start_trading)
        self._build_args(optionlist=ARGS_TRADE, parser=trade_cmd)

        # add create-userdir subcommand
        create_userdir_cmd = subparsers.add_parser('create-userdir',
                                                   help="Create user-data directory.",
                                                   )
        create_userdir_cmd.set_defaults(func=start_create_userdir)
        self._build_args(optionlist=ARGS_CREATE_USERDIR, parser=create_userdir_cmd)

        # add new-config subcommand
        build_config_cmd = subparsers.add_parser('new-config',
                                                 help="Create new config")
        build_config_cmd.set_defaults(func=start_new_config)
        self._build_args(optionlist=ARGS_BUILD_CONFIG, parser=build_config_cmd)

        # add new-hyperopt subcommand
        build_hyperopt_cmd = subparsers.add_parser('new-hyperopt',
                                                   help="Create new hyperopt")
        build_hyperopt_cmd.set_defaults(func=start_new_hyperopt)
        self._build_args(optionlist=ARGS_BUILD_HYPEROPT, parser=build_hyperopt_cmd)

        # add new-strategy subcommand
        build_strategy_cmd = subparsers.add_parser('new-strategy',
                                                   help="Create new strategy")
        build_strategy_cmd.set_defaults(func=start_new_strategy)
        self._build_args(optionlist=ARGS_BUILD_STRATEGY, parser=build_strategy_cmd)

        # Add download-data subcommand
        download_data_cmd = subparsers.add_parser(
            'download-data',
            help='Download backtesting data.',
            parents=[_common_parser],
        )
        download_data_cmd.set_defaults(func=start_download_data)
        self._build_args(optionlist=ARGS_DOWNLOAD_DATA, parser=download_data_cmd)

        # Add convert-data subcommand
        convert_data_cmd = subparsers.add_parser(
            'convert-data',
            help='Convert candle (OHLCV) data from one format to another.',
            parents=[_common_parser],
        )
        convert_data_cmd.set_defaults(func=partial(start_convert_data, ohlcv=True))
        self._build_args(optionlist=ARGS_CONVERT_DATA_OHLCV, parser=convert_data_cmd)

        # Add convert-trade-data subcommand
        convert_trade_data_cmd = subparsers.add_parser(
            'convert-trade-data',
            help='Convert trade data from one format to another.',
            parents=[_common_parser],
        )
        convert_trade_data_cmd.set_defaults(func=partial(start_convert_data, ohlcv=False))
        self._build_args(optionlist=ARGS_CONVERT_DATA, parser=convert_trade_data_cmd)

        # Add list-data subcommand
        list_data_cmd = subparsers.add_parser(
            'list-data',
            help='List downloaded data.',
            parents=[_common_parser],
        )
        list_data_cmd.set_defaults(func=start_list_data)
        self._build_args(optionlist=ARGS_LIST_DATA, parser=list_data_cmd)

        # Add backtesting subcommand
        backtesting_cmd = subparsers.add_parser('backtesting', help='Backtesting module.',
                                                parents=[_common_parser, _strategy_parser])
        backtesting_cmd.set_defaults(func=start_backtesting)
        self._build_args(optionlist=ARGS_BACKTEST, parser=backtesting_cmd)

        # Add edge subcommand
        edge_cmd = subparsers.add_parser('edge', help='Edge module.',
                                         parents=[_common_parser, _strategy_parser])
        edge_cmd.set_defaults(func=start_edge)
        self._build_args(optionlist=ARGS_EDGE, parser=edge_cmd)

        # Add hyperopt subcommand
        hyperopt_cmd = subparsers.add_parser('hyperopt', help='Hyperopt module.',
                                             parents=[_common_parser, _strategy_parser],
                                             )
        hyperopt_cmd.set_defaults(func=start_hyperopt)
        self._build_args(optionlist=ARGS_HYPEROPT, parser=hyperopt_cmd)

        # Add hyperopt-list subcommand
        hyperopt_list_cmd = subparsers.add_parser(
            'hyperopt-list',
            help='List Hyperopt results',
            parents=[_common_parser],
        )
        hyperopt_list_cmd.set_defaults(func=start_hyperopt_list)
        self._build_args(optionlist=ARGS_HYPEROPT_LIST, parser=hyperopt_list_cmd)

        # Add hyperopt-show subcommand
        hyperopt_show_cmd = subparsers.add_parser(
            'hyperopt-show',
            help='Show details of Hyperopt results',
            parents=[_common_parser],
        )
        hyperopt_show_cmd.set_defaults(func=start_hyperopt_show)
        self._build_args(optionlist=ARGS_HYPEROPT_SHOW, parser=hyperopt_show_cmd)

        # Add list-exchanges subcommand
        list_exchanges_cmd = subparsers.add_parser(
            'list-exchanges',
            help='Print available exchanges.',
            parents=[_common_parser],
        )
        list_exchanges_cmd.set_defaults(func=start_list_exchanges)
        self._build_args(optionlist=ARGS_LIST_EXCHANGES, parser=list_exchanges_cmd)

        # Add list-hyperopts subcommand
        list_hyperopts_cmd = subparsers.add_parser(
            'list-hyperopts',
            help='Print available hyperopt classes.',
            parents=[_common_parser],
        )
        list_hyperopts_cmd.set_defaults(func=start_list_hyperopts)
        self._build_args(optionlist=ARGS_LIST_HYPEROPTS, parser=list_hyperopts_cmd)

        # Add list-markets subcommand
        list_markets_cmd = subparsers.add_parser(
            'list-markets',
            help='Print markets on exchange.',
            parents=[_common_parser],
        )
        list_markets_cmd.set_defaults(func=partial(start_list_markets, pairs_only=False))
        self._build_args(optionlist=ARGS_LIST_PAIRS, parser=list_markets_cmd)

        # Add list-pairs subcommand
        list_pairs_cmd = subparsers.add_parser(
            'list-pairs',
            help='Print pairs on exchange.',
            parents=[_common_parser],
        )
        list_pairs_cmd.set_defaults(func=partial(start_list_markets, pairs_only=True))
        self._build_args(optionlist=ARGS_LIST_PAIRS, parser=list_pairs_cmd)

        # Add list-strategies subcommand
        list_strategies_cmd = subparsers.add_parser(
            'list-strategies',
            help='Print available strategies.',
            parents=[_common_parser],
        )
        list_strategies_cmd.set_defaults(func=start_list_strategies)
        self._build_args(optionlist=ARGS_LIST_STRATEGIES, parser=list_strategies_cmd)

        # Add list-timeframes subcommand
        list_timeframes_cmd = subparsers.add_parser(
            'list-timeframes',
            help='Print available timeframes for the exchange.',
            parents=[_common_parser],
        )
        list_timeframes_cmd.set_defaults(func=start_list_timeframes)
        self._build_args(optionlist=ARGS_LIST_TIMEFRAMES, parser=list_timeframes_cmd)

        # Add show-trades subcommand
        show_trades = subparsers.add_parser(
            'show-trades',
            help='Show trades.',
            parents=[_common_parser],
        )
        show_trades.set_defaults(func=start_show_trades)
        self._build_args(optionlist=ARGS_SHOW_TRADES, parser=show_trades)

        # Add test-pairlist subcommand
        test_pairlist_cmd = subparsers.add_parser(
            'test-pairlist',
            help='Test your pairlist configuration.',
        )
        test_pairlist_cmd.set_defaults(func=start_test_pairlist)
        self._build_args(optionlist=ARGS_TEST_PAIRLIST, parser=test_pairlist_cmd)

        # Add install-ui subcommand
        install_ui_cmd = subparsers.add_parser(
            'install-ui',
            help='Install FreqUI',
        )
        install_ui_cmd.set_defaults(func=start_install_ui)
        self._build_args(optionlist=ARGS_INSTALL_UI, parser=install_ui_cmd)

        # Add Plotting subcommand
        plot_dataframe_cmd = subparsers.add_parser(
            'plot-dataframe',
            help='Plot candles with indicators.',
            parents=[_common_parser, _strategy_parser],
        )
        plot_dataframe_cmd.set_defaults(func=start_plot_dataframe)
        self._build_args(optionlist=ARGS_PLOT_DATAFRAME, parser=plot_dataframe_cmd)

        # Plot profit
        plot_profit_cmd = subparsers.add_parser(
            'plot-profit',
            help='Generate plot showing profits.',
            parents=[_common_parser, _strategy_parser],
        )
        plot_profit_cmd.set_defaults(func=start_plot_profit)
        self._build_args(optionlist=ARGS_PLOT_PROFIT, parser=plot_profit_cmd)
