from decimal import Decimal as D

from django.test import TestCase

from core.exchanges.common import convert_open_trades
from core.models import Trade
from core.tests.helpers import ElasticMock, LiveBase
from core.trading.market import get_precision, get_price, get_sl, get_tp


class LiveTradingTestCase(ElasticMock, LiveBase, TestCase):
    def setUp(self):
        super(LiveTradingTestCase, self).setUp()
        self.trade = Trade.objects.create(
            user=self.user,
            account=self.account,
            symbol="EUR_USD",
            time_in_force="FOK",
            type="market",
            amount=10,
            direction="buy",
        )
        self.commission = 0.025

    def test_account_functional(self):
        """
        Test that the account is functional.
        """
        balance = self.account.client.get_balance()
        # We need some money to place trades
        self.assertTrue(balance > 1000)

    def open_trade(self, trade=None):
        if trade:
            posted = trade.post()
        else:
            posted = self.trade.post()
        # Check the opened trade
        self.assertEqual(posted["type"], "MARKET_ORDER")
        self.assertEqual(posted["symbol"], "EUR_USD")
        self.assertEqual(posted["units"], "10")
        self.assertEqual(posted["timeInForce"], "FOK")

        return posted

    def close_trade(self, trade=None):
        if trade:
            trade.refresh_from_db()
            closed = self.account.client.close_trade(trade.order_id)
        else:
            # refresh the trade to get the trade id
            self.trade.refresh_from_db()
            closed = self.account.client.close_trade(self.trade.order_id)

        # Check the feedback from closing the trade
        self.assertEqual(closed["type"], "MARKET_ORDER")
        self.assertEqual(closed["symbol"], "EUR_USD")
        self.assertEqual(closed["units"], "-10")
        self.assertEqual(closed["timeInForce"], "FOK")
        self.assertEqual(closed["reason"], "TRADE_CLOSE")

        return closed

    def test_place_close_trade(self):
        """
        Test placing a trade.
        """
        self.open_trade()
        self.close_trade()

    def test_get_all_open_trades(self):
        """
        Test getting all open trades.
        """

        self.open_trade()

        trades = self.account.client.get_all_open_trades()
        self.trade.refresh_from_db()
        found = False
        for trade in trades["itemlist"]:
            if trade["id"] == self.trade.order_id:
                self.assertEqual(trade["symbol"], "EUR_USD")
                self.assertEqual(trade["currentUnits"], "10")
                self.assertEqual(trade["initialUnits"], "10")
                self.assertEqual(trade["state"], "OPEN")
                found = True
                break
        self.close_trade()

        if not found:
            self.fail("Could not find the trade in the list of open trades")

    def test_convert_open_trades(self):
        """
        Test converting open trades response to Trade-like format.
        """
        eur_usd_price = get_price(self.account, "buy", "EUR_USD")
        trade_tp = get_tp("buy", 1, eur_usd_price)
        trade_sl = get_sl("buy", 2, eur_usd_price)
        # trade_tsl = get_sl("buy", 1, eur_usd_price, return_var=True)
        # # TP 1% profit
        # trade_tp = eur_usd_price * D(1.01)
        # # SL 2% loss
        # trade_sl = eur_usd_price * D(0.98)
        # # TSL 1% loss
        # trade_tsl = eur_usd_price * D(0.99)

        trade_precision, display_precision = get_precision(self.account, "EUR_USD")
        # Round everything to the display precision

        trade_tp = round(trade_tp, display_precision)
        trade_sl = round(trade_sl, display_precision)
        # trade_tsl = round(trade_tsl, display_precision)

        complex_trade = Trade.objects.create(
            user=self.user,
            account=self.account,
            symbol="EUR_USD",
            time_in_force="FOK",
            type="market",
            amount=10,
            direction="buy",
            take_profit=trade_tp,
            stop_loss=trade_sl,
            # trailing_stop_loss=trade_tsl,
        )

        self.open_trade(complex_trade)
        trades = self.account.client.get_all_open_trades()
        trades_converted = convert_open_trades(trades["itemlist"])
        self.assertEqual(len(trades_converted), 1)
        expected_tp_percent = D(1 - self.commission)
        expected_sl_percent = D(2 - self.commission)
        actual_tp_percent = trades_converted[0]["take_profit_percent"]
        actual_sl_percent = trades_converted[0]["stop_loss_percent"]
        print("actual_tp_percent", actual_tp_percent)
        print("actual_sl_percent", actual_sl_percent)

        tp_percent_difference = abs(expected_tp_percent - actual_tp_percent)
        sl_percent_difference = abs(expected_sl_percent - actual_sl_percent)
        max_difference = D(0.08)  # depends on market conditions
        print("TP percent difference: {}".format(tp_percent_difference))
        print("SL percent difference: {}".format(sl_percent_difference))

        self.assertLess(tp_percent_difference, max_difference)
        self.assertLess(sl_percent_difference, max_difference)
        self.close_trade(complex_trade)