import freqtrade.vendor.qtpylib.indicators as qtpylib
import numpy as np
import talib.abstract as ta
from freqtrade.strategy.interface import IStrategy
from freqtrade.strategy import merge_informative_pair, DecimalParameter, stoploss_from_open, RealParameter
from pandas import DataFrame, Series
from datetime import datetime
from user_data.freqtrade3cw import Freqtrade3cw

def bollinger_bands(stock_price, window_size, num_of_std):
    rolling_mean = stock_price.rolling(window=window_size).mean()
    rolling_std = stock_price.rolling(window=window_size).std()
    lower_band = rolling_mean - (rolling_std * num_of_std)
    return np.nan_to_num(rolling_mean), np.nan_to_num(lower_band)

def ha_typical_price(bars):
    res = (bars['ha_high'] + bars['ha_low'] + bars['ha_close']) / 3.
    return Series(index=bars.index, data=res)

class ClucDCA(IStrategy):

    """
    PASTE OUTPUT FROM HYPEROPT HERE
    Can be overridden for specific sub-strategies (stake currencies) at the bottom.
    """
    entry_params = {
        'bbdelta_close': 0.01965,
        'bbdelta_tail': 0.95089,
        'close_bblower': 0.00799,
        'closedelta_close': 0.00556,
        'rocr_1h': 0.54904
    }

    # Sell hyperspace params:
    exit_params = {
        # custom stoploss params, come from BB_RPB_TSL
        "pHSL": -0.32,
        "pPF_1": 0.02,
        "pPF_2": 0.047,
        "pSL_1": 0.02,
        "pSL_2": 0.046, 

        'exit-fisher': 0.38414, 
        'exit-bbmiddle-close': 1.07634
    }

    # ROI table:
    minimal_roi = {
        "70": 0
    }

    # Stoploss:
    stoploss = -0.99   # use custom stoploss

    # Trailing stop:
    trailing_stop = False
    trailing_stop_positive = 0.001
    trailing_stop_positive_offset = 0.012
    trailing_only_offset_is_reached = False

    """
    END HYPEROPT
    """
    
    timeframe = '1m'

    # Make sure these match or are not overridden in config
    use_exit_signal = True
    exit_profit_only = False
    ignore_roi_if_entry_signal = False

    # Custom stoploss
    use_custom_stoploss = True

    process_only_new_candles = True
    startup_candle_count = 168

    order_types = {
        'entry': 'market',
        'exit': 'market',
        'emergencyexit': 'market',
        'forceentry': "market",
        'forceexit': 'market',
        'stoploss': 'market',
        'stoploss_on_exchange': False,

        'stoploss_on_exchange_interval': 60,
        'stoploss_on_exchange_limit_ratio': 0.99
    }

    # entry params
    rocr_1h = RealParameter(0.5, 1.0, default=0.54904, space='entry', optimize=True)
    bbdelta_close = RealParameter(0.0005, 0.02, default=0.01965, space='entry', optimize=True)
    closedelta_close = RealParameter(0.0005, 0.02, default=0.00556, space='entry', optimize=True)
    bbdelta_tail = RealParameter(0.7, 1.0, default=0.95089, space='entry', optimize=True)
    close_bblower = RealParameter(0.0005, 0.02, default=0.00799, space='entry', optimize=True)

    # hard stoploss profit
    pHSL = DecimalParameter(-0.500, -0.040, default=-0.08, decimals=3, space='exit', load=True)
    # profit threshold 1, trigger point, SL_1 is used
    pPF_1 = DecimalParameter(0.008, 0.020, default=0.016, decimals=3, space='exit', load=True)
    pSL_1 = DecimalParameter(0.008, 0.020, default=0.011, decimals=3, space='exit', load=True)

    # profit threshold 2, SL_2 is used
    pPF_2 = DecimalParameter(0.040, 0.100, default=0.080, decimals=3, space='exit', load=True)
    pSL_2 = DecimalParameter(0.020, 0.070, default=0.040, decimals=3, space='exit', load=True)

    def informative_pairs(self):
        pairs = self.dp.current_whitelist()
        informative_pairs = [(pair, '1h') for pair in pairs]
        return informative_pairs


    ############################################################################
    #come from BB_RPB_TSL

    # Custom Trailing stoploss ( credit to Perkmeister for this custom stoploss to help the strategy ride a green candle )
    def custom_stoploss(self, pair: str, trade: 'Trade', current_time: datetime,
                        current_rate: float, current_profit: float, **kwargs) -> float:
    
        # hard stoploss profit
        HSL = self.pHSL.value
        PF_1 = self.pPF_1.value
        SL_1 = self.pSL_1.value
        PF_2 = self.pPF_2.value
        SL_2 = self.pSL_2.value

        # For profits between PF_1 and PF_2 the stoploss (sl_profit) used is linearly interpolated
        # between the values of SL_1 and SL_2. For all profits above PL_2 the sl_profit value
        # rises linearly with current profit, for profits below PF_1 the hard stoploss profit is used.

        if (current_profit > PF_2):
            sl_profit = SL_2 + (current_profit - PF_2)
        elif (current_profit > PF_1):
            sl_profit = SL_1 + ((current_profit - PF_1) * (SL_2 - SL_1) / (PF_2 - PF_1))
        else:
            sl_profit = HSL

        # Only for hyperopt invalid return
        if (sl_profit >= current_profit):
            return -0.99
    
        return stoploss_from_open(sl_profit, current_profit)

    ############################################################################

    def populate_indicators(self, dataframe: DataFrame, metadata: dict) -> DataFrame:
        # # Heikin Ashi Candles
        heikinashi = qtpylib.heikinashi(dataframe)
        dataframe['ha_open'] = heikinashi['open']
        dataframe['ha_close'] = heikinashi['close']
        dataframe['ha_high'] = heikinashi['high']
        dataframe['ha_low'] = heikinashi['low']


        # Set Up Bollinger Bands
        mid, lower = bollinger_bands(ha_typical_price(dataframe), window_size=40, num_of_std=2)
        dataframe['lower'] = lower
        dataframe['mid'] = mid
        
        dataframe['bbdelta'] = (mid - dataframe['lower']).abs()
        dataframe['closedelta'] = (dataframe['ha_close'] - dataframe['ha_close'].shift()).abs()
        dataframe['tail'] = (dataframe['ha_close'] - dataframe['ha_low']).abs()

        dataframe['bb_lowerband'] = dataframe['lower']
        dataframe['bb_middleband'] = dataframe['mid']

        dataframe['ema_fast'] = ta.EMA(dataframe['ha_close'], timeperiod=3)
        dataframe['ema_slow'] = ta.EMA(dataframe['ha_close'], timeperiod=50)
        dataframe['volume_mean_slow'] = dataframe['volume'].rolling(window=30).mean()
        dataframe['rocr'] = ta.ROCR(dataframe['ha_close'], timeperiod=28)

        rsi = ta.RSI(dataframe)
        dataframe["rsi"] = rsi
        rsi = 0.1 * (rsi - 50)
        dataframe["fisher"] = (np.exp(2 * rsi) - 1) / (np.exp(2 * rsi) + 1)
        
        inf_tf = '1h'
        
        informative = self.dp.get_pair_dataframe(pair=metadata['pair'], timeframe=inf_tf)
        
        inf_heikinashi = qtpylib.heikinashi(informative)

        informative['ha_close'] = inf_heikinashi['close']
        informative['rocr'] = ta.ROCR(informative['ha_close'], timeperiod=168)
     
        dataframe = merge_informative_pair(dataframe, informative, self.timeframe, inf_tf, ffill=True)

        return dataframe

    @Freqtrade3cw.entry_signal
    def populate_entry_trend(self, dataframe: DataFrame, metadata: dict) -> DataFrame:
        params = self.entry_params

        dataframe.loc[
            (
                dataframe['rocr_1h'].gt(self.rocr_1h.value)
            ) &
            ((      
                    (dataframe['lower'].shift().gt(0)) &
                    (dataframe['bbdelta'].gt(dataframe['ha_close'] * self.bbdelta_close.value)) &
                    (dataframe['closedelta'].gt(dataframe['ha_close'] * self.closedelta_close.value)) &
                    (dataframe['tail'].lt(dataframe['bbdelta'] * self.bbdelta_tail.value)) &
                    (dataframe['ha_close'].lt(dataframe['lower'].shift())) &
                    (dataframe['ha_close'].le(dataframe['ha_close'].shift()))
            ) |
            (       
                    (dataframe['ha_close'] < dataframe['ema_slow']) &
                    (dataframe['ha_close'] < self.close_bblower.value * dataframe['bb_lowerband'])
            )),
            'entry'
        ] = 1

        return dataframe

    def populate_exit_trend(self, dataframe: DataFrame, metadata: dict) -> DataFrame:
        params = self.exit_params

        dataframe.loc[
            (dataframe['fisher'] > params['exit-fisher']) &
            (dataframe['ha_high'].le(dataframe['ha_high'].shift(1))) &
            (dataframe['ha_high'].shift(1).le(dataframe['ha_high'].shift(2))) &
            (dataframe['ha_close'].le(dataframe['ha_close'].shift(1))) &
            (dataframe['ema_fast'] > dataframe['ha_close']) &
            ((dataframe['ha_close'] * params['exit-bbmiddle-close']) > dataframe['bb_middleband']) &
            (dataframe['volume'] > 0)
            ,
            'exit'
        ] = 1

        return dataframe

class ClucHAnix_ETH(ClucHAnix):

    # Buy hyperspace params:
    entry_params = {
        'bbdelta-close': 0.01566,
        'bbdelta-tail': 0.8478,
        'close-bblower': 0.00998,
        'closedelta-close': 0.00614,
        'rocr-1h': 0.61579,
        'volume': 27
    }
	
    # Sell hyperspace params:
    exit_params = {
        'exit-bbmiddle-close': 1.02894, 
		'exit-fisher': 0.38414
    }
	
    # ROI table:
    minimal_roi = {
        "0": 0.14414,
        "13": 0.10123,
        "20": 0.03256,
        "47": 0.0177,
        "132": 0.01016,
        "177": 0.00328,
        "277": 0
    }
	
    # Stoploss:
    stoploss = -0.02
	
    # Trailing stop:
    trailing_stop = True
    trailing_stop_positive = 0.01
    trailing_stop_positive_offset = 0.0116
    trailing_only_offset_is_reached = False

class ClucHAnix_BTC(ClucHAnix):

    # Buy hyperspace params:
    entry_params = {
        'bbdelta-close': 0.01192,
        'bbdelta-tail': 0.96183,
        'close-bblower': 0.01212,
        'closedelta-close': 0.01039,
        'rocr-1h': 0.53422,
        'volume': 27
    }
	
    # Sell hyperspace params:
    exit_params = {
        'exit-bbmiddle-close': 0.98016, 
		'exit-fisher': 0.38414
    }
	
    # ROI table:
    minimal_roi = {
        "0": 0.19724,
        "15": 0.14323,
        "33": 0.07688,
        "52": 0.03011,
        "144": 0.01616,
        "307": 0.0063,
        "449": 0
    }
	
    # Stoploss:
    stoploss = -0.11356
	
    # Trailing stop:
    trailing_stop = True
    trailing_stop_positive = 0.01544
    trailing_stop_positive_offset = 0.11438
    trailing_only_offset_is_reached = False

class ClucHAnix_USD(ClucHAnix):

    # Buy hyperspace params:
    entry_params = {
        'bbdelta-close': 0.01806,
        'bbdelta-tail': 0.85912,
        'close-bblower': 0.01158,
        'closedelta-close': 0.01466,
        'rocr-1h': 0.51901,
        'volume': 26
    }
	
    # Sell hyperspace params:
    exit_params = {
        'exit-bbmiddle-close': 0.96094, 
        'exit-fisher': 0.38414
    }

    # ROI table:
    minimal_roi = {
        "0": 0.16139,
        "11": 0.12608,
        "54": 0.08335,
        "140": 0.03423,
        "197": 0.0123,
        "325": 0.00649,
        "417": 0
    }

    # Stoploss:
    stoploss = -0.17654

    # Trailing stop:
    trailing_stop = True
    trailing_stop_positive = 0.0101
    trailing_stop_positive_offset = 0.02952
    trailing_only_offset_is_reached = False