"""
Functions to handle deprecated settings
"""

import logging
from typing import Optional

from freqtrade.constants import Config
from freqtrade.exceptions import OperationalException


logger = logging.getLogger(__name__)


def check_conflicting_settings(config: Config,
                               section_old: Optional[str], name_old: str,
                               section_new: Optional[str], name_new: str) -> None:
    section_new_config = config.get(section_new, {}) if section_new else config
    section_old_config = config.get(section_old, {}) if section_old else config
    if name_new in section_new_config and name_old in section_old_config:
        new_name = f"{section_new}.{name_new}" if section_new else f"{name_new}"
        old_name = f"{section_old}.{name_old}" if section_old else f"{name_old}"
        raise OperationalException(
            f"Conflicting settings `{new_name}` and `{old_name}` "
            "(DEPRECATED) detected in the configuration file. "
            "This deprecated setting will be removed in the next versions of Freqtrade. "
            f"Please delete it from your configuration and use the `{new_name}` "
            "setting instead."
        )


def process_removed_setting(config: Config,
                            section1: str, name1: str,
                            section2: Optional[str], name2: str) -> None:
    """
    :param section1: Removed section
    :param name1: Removed setting name
    :param section2: new section for this key
    :param name2: new setting name
    """
    section1_config = config.get(section1, {})
    if name1 in section1_config:
        section_2 = f"{section2}.{name2}" if section2 else f"{name2}"
        raise OperationalException(
            f"Setting `{section1}.{name1}` has been moved to `{section_2}. "
            f"Please delete it from your configuration and use the `{section_2}` "
            "setting instead."
        )


def process_deprecated_setting(config: Config,
                               section_old: Optional[str], name_old: str,
                               section_new: Optional[str], name_new: str
                               ) -> None:
    check_conflicting_settings(config, section_old, name_old, section_new, name_new)
    section_old_config = config.get(section_old, {}) if section_old else config

    if name_old in section_old_config:
        section_1 = f"{section_old}.{name_old}" if section_old else f"{name_old}"
        section_2 = f"{section_new}.{name_new}" if section_new else f"{name_new}"
        logger.warning(
            "DEPRECATED: "
            f"The `{section_1}` setting is deprecated and "
            "will be removed in the next versions of Freqtrade. "
            f"Please use the `{section_2}` setting in your configuration instead."
        )

        section_new_config = config.get(section_new, {}) if section_new else config
        section_new_config[name_new] = section_old_config[name_old]
        del section_old_config[name_old]


def process_temporary_deprecated_settings(config: Config) -> None:

    # Kept for future deprecated / moved settings
    # check_conflicting_settings(config, 'ask_strategy', 'use_sell_signal',
    #                            'experimental', 'use_sell_signal')

    process_deprecated_setting(config, 'ask_strategy', 'ignore_buying_expired_candle_after',
                               None, 'ignore_buying_expired_candle_after')

    process_deprecated_setting(config, None, 'forcebuy_enable', None, 'force_entry_enable')

    # New settings
    if config.get('telegram'):
        process_deprecated_setting(config['telegram'], 'notification_settings', 'sell',
                                   'notification_settings', 'exit')
        process_deprecated_setting(config['telegram'], 'notification_settings', 'sell_fill',
                                   'notification_settings', 'exit_fill')
        process_deprecated_setting(config['telegram'], 'notification_settings', 'sell_cancel',
                                   'notification_settings', 'exit_cancel')
        process_deprecated_setting(config['telegram'], 'notification_settings', 'buy',
                                   'notification_settings', 'entry')
        process_deprecated_setting(config['telegram'], 'notification_settings', 'buy_fill',
                                   'notification_settings', 'entry_fill')
        process_deprecated_setting(config['telegram'], 'notification_settings', 'buy_cancel',
                                   'notification_settings', 'entry_cancel')
    if config.get('webhook'):
        process_deprecated_setting(config, 'webhook', 'webhookbuy', 'webhook', 'webhookentry')
        process_deprecated_setting(config, 'webhook', 'webhookbuycancel',
                                   'webhook', 'webhookentrycancel')
        process_deprecated_setting(config, 'webhook', 'webhookbuyfill',
                                   'webhook', 'webhookentryfill')
        process_deprecated_setting(config, 'webhook', 'webhooksell', 'webhook', 'webhookexit')
        process_deprecated_setting(config, 'webhook', 'webhooksellcancel',
                                   'webhook', 'webhookexitcancel')
        process_deprecated_setting(config, 'webhook', 'webhooksellfill',
                                   'webhook', 'webhookexitfill')

    # Legacy way - having them in experimental ...

    process_removed_setting(config, 'experimental', 'use_sell_signal', None, 'use_exit_signal')
    process_removed_setting(config, 'experimental', 'sell_profit_only', None, 'exit_profit_only')
    process_removed_setting(config, 'experimental', 'ignore_roi_if_buy_signal',
                            None, 'ignore_roi_if_entry_signal')

    process_removed_setting(config, 'ask_strategy', 'use_sell_signal', None, 'use_exit_signal')
    process_removed_setting(config, 'ask_strategy', 'sell_profit_only', None, 'exit_profit_only')
    process_removed_setting(config, 'ask_strategy', 'sell_profit_offset',
                            None, 'exit_profit_offset')
    process_removed_setting(config, 'ask_strategy', 'ignore_roi_if_buy_signal',
                            None, 'ignore_roi_if_entry_signal')
    if (config.get('edge', {}).get('enabled', False)
       and 'capital_available_percentage' in config.get('edge', {})):
        raise OperationalException(
            "DEPRECATED: "
            "Using 'edge.capital_available_percentage' has been deprecated in favor of "
            "'tradable_balance_ratio'. Please migrate your configuration to "
            "'tradable_balance_ratio' and remove 'capital_available_percentage' "
            "from the edge configuration."
        )
    if 'ticker_interval' in config:

        raise OperationalException(
            "DEPRECATED: 'ticker_interval' detected. "
            "Please use 'timeframe' instead of 'ticker_interval."
        )

    if 'protections' in config:
        logger.warning("DEPRECATED: Setting 'protections' in the configuration is deprecated.")