from copy import deepcopy
from pathlib import Path
from typing import Dict, List, Optional, Union

from fastapi import APIRouter, Depends
from fastapi.exceptions import HTTPException

from freqtrade import __version__
from freqtrade.constants import USERPATH_STRATEGIES
from freqtrade.data.history import get_datahandler
from freqtrade.exceptions import OperationalException
from freqtrade.rpc import RPC
from freqtrade.rpc.rpc import RPCException

from .api_models import (AvailablePairs, Balances, BlacklistPayload, BlacklistResponse, Count,
                         Daily, DeleteTrade, ForceBuyPayload, ForceSellPayload, Locks, Logs,
                         PairHistory, PerformanceEntry, Ping, PlotConfig, Profit, ResultMsg, Stats,
                         StatusMsg, StrategyListResponse, StrategyResponse, Version,
                         WhitelistResponse)
from .deps import get_config, get_rpc


# Public API, requires no auth.
router_public = APIRouter()
# Private API, protected by authentication
router = APIRouter()


@router_public.get('/ping', response_model=Ping)
def ping():
    """simple ping"""
    return {"status": "pong"}


@router.get('/version', response_model=Version, tags=['info'])
def version():
    """ Bot Version info"""
    return {"version": __version__}


@router.get('/balance', response_model=Balances, tags=['info'])
def balance(rpc: RPC = Depends(get_rpc), config=Depends(get_config)):
    """Account Balances"""
    return rpc._rpc_balance(config['stake_currency'], config.get('fiat_display_currency', ''),)


@router.get('/count', response_model=Count, tags=['info'])
def count(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_count()


@router.get('/performance', response_model=List[PerformanceEntry], tags=['info'])
def performance(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_performance()


@router.get('/profit', response_model=Profit, tags=['info'])
def profit(rpc: RPC = Depends(get_rpc), config=Depends(get_config)):
    return rpc._rpc_trade_statistics(config['stake_currency'],
                                     config.get('fiat_display_currency')
                                     )


@router.get('/stats', response_model=Stats, tags=['info'])
def stats(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_stats()


@router.get('/daily', response_model=Daily, tags=['info'])
def daily(timescale: int = 7, rpc: RPC = Depends(get_rpc), config=Depends(get_config)):
    return rpc._rpc_daily_profit(timescale, config['stake_currency'],
                                 config.get('fiat_display_currency', ''))


# TODO: Missing response model
@router.get('/status', tags=['info'])
def status(rpc: RPC = Depends(get_rpc)):
    try:
        return rpc._rpc_trade_status()
    except RPCException:
        return []


# TODO: Missing response model
@router.get('/trades', tags=['info', 'trading'])
def trades(limit: Optional[int] = 0, rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_trade_history(limit)


@router.delete('/trades/{tradeid}', response_model=DeleteTrade, tags=['info', 'trading'])
def trades_delete(tradeid: int, rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_delete(tradeid)


# TODO: Missing response model
@router.get('/edge', tags=['info'])
def edge(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_edge()


# TODO: Missing response model
@router.get('/show_config', tags=['info'])
def show_config(rpc: RPC = Depends(get_rpc), config=Depends(get_config)):
    return RPC._rpc_show_config(config, rpc._freqtrade.state)


# TODO: Missing response model
@router.post('/forcebuy', tags=['trading'])
def forcebuy(payload: ForceBuyPayload, rpc: RPC = Depends(get_rpc)):
    trade = rpc._rpc_forcebuy(payload.pair, payload.price)

    if trade:
        return trade.to_json()
    else:
        return {"status": f"Error buying pair {payload.pair}."}


@router.post('/forcesell', response_model=ResultMsg, tags=['trading'])
def forcesell(payload: ForceSellPayload, rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_forcesell(payload.tradeid)


@router.get('/blacklist', response_model=BlacklistResponse, tags=['info', 'pairlist'])
def blacklist(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_blacklist()


@router.post('/blacklist', response_model=BlacklistResponse, tags=['info', 'pairlist'])
def blacklist_post(payload: BlacklistPayload, rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_blacklist(payload.blacklist)


@router.get('/whitelist', response_model=WhitelistResponse, tags=['info', 'pairlist'])
def whitelist(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_whitelist()


@router.get('/locks', response_model=Locks, tags=['info'])
def locks(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_locks()


@router.get('/logs', response_model=Logs, tags=['info'])
def logs(limit: Optional[int] = None, rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_get_logs(limit)


@router.post('/start', response_model=StatusMsg, tags=['botcontrol'])
def start(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_start()


@router.post('/stop', response_model=StatusMsg, tags=['botcontrol'])
def stop(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_stop()


@router.post('/stopbuy', response_model=StatusMsg, tags=['botcontrol'])
def stop_buy(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_stopbuy()


@router.post('/reload_config', response_model=StatusMsg, tags=['botcontrol'])
def reload_config(rpc: RPC = Depends(get_rpc)):
    return rpc._rpc_reload_config()


@router.get('/pair_candles', response_model=PairHistory, tags=['candle data'])
def pair_candles(pair: str, timeframe: str, limit: Optional[int], rpc=Depends(get_rpc)):
    return rpc._rpc_analysed_dataframe(pair, timeframe, limit)


@router.get('/pair_history', response_model=PairHistory, tags=['candle data'])
def pair_history(pair: str, timeframe: str, timerange: str, strategy: str,
                 config=Depends(get_config)):
    config = deepcopy(config)
    config.update({
            'strategy': strategy,
        })
    return RPC._rpc_analysed_history_full(config, pair, timeframe, timerange)


@router.get('/plot_config', response_model=Union[Dict, PlotConfig], tags=['candle data'])
def plot_config(rpc=Depends(get_rpc)):
    return rpc._rpc_plot_config()


@router.get('/strategies', response_model=StrategyListResponse, tags=['strategy'])
def list_strategies(config=Depends(get_config)):
    directory = Path(config.get(
        'strategy_path', config['user_data_dir'] / USERPATH_STRATEGIES))
    from freqtrade.resolvers.strategy_resolver import StrategyResolver
    strategies = StrategyResolver.search_all_objects(directory, False)
    strategies = sorted(strategies, key=lambda x: x['name'])

    return {'strategies': [x['name'] for x in strategies]}


@router.get('/strategy/{strategy}', response_model=StrategyResponse, tags=['strategy'])
def get_strategy(strategy: str, rpc: RPC = Depends(get_rpc), config=Depends(get_config)):

    config = deepcopy(config)
    from freqtrade.resolvers.strategy_resolver import StrategyResolver
    try:
        strategy_obj = StrategyResolver._load_strategy(strategy, config,
                                                       extra_dir=config.get('strategy_path'))
    except OperationalException:
        raise HTTPException(status_code=404, detail='Strategy not found')

    return {
        'strategy': strategy_obj.get_strategy_name(),
        'code': strategy_obj.__source__,
    }


@router.get('/available_pairs', response_model=AvailablePairs, tags=['candle data'])
def list_available_pairs(timeframe: Optional[str] = None, stake_currency: Optional[str] = None,
                         config=Depends(get_config)):

    dh = get_datahandler(config['datadir'], config.get('dataformat_ohlcv', None))

    pair_interval = dh.ohlcv_get_available_data(config['datadir'])

    if timeframe:
        pair_interval = [pair for pair in pair_interval if pair[1] == timeframe]
    if stake_currency:
        pair_interval = [pair for pair in pair_interval if pair[0].endswith(stake_currency)]
    pair_interval = sorted(pair_interval, key=lambda x: x[0])

    pairs = list({x[0] for x in pair_interval})

    result = {
        'length': len(pairs),
        'pairs': pairs,
        'pair_interval': pair_interval,
    }
    return result