"""
Questrade broker testing
"""
import time
import logging

import trio
from trio.testing import trio_test
import tractor
from tractor.testing import tractor_test
from piker.brokers import questrade as qt
import pytest


log = tractor.get_logger('tests')


@pytest.fixture(autouse=True)
def check_qt_conf_section(brokerconf):
    """Skip this module's tests if we have not quetrade API creds.
    """
    if not brokerconf.has_section('questrade'):
        pytest.skip("No questrade API credentials available")


# stock quote
_ex_quotes = {
    'stock': {
        "VWAP": 7.383792,
        "askPrice": 7.56,
        "askSize": 2,
        "bidPrice": 6.1,
        "bidSize": 2,
        "delay": 0,
        "high52w": 9.68,
        "highPrice": 8,
        "key": "EMH.VN",
        "isHalted": 'false',
        "lastTradePrice": 6.96,
        "lastTradePriceTrHrs": 6.97,
        "lastTradeSize": 2000,
        "lastTradeTick": "Down",
        "lastTradeTime": "2018-02-07T15:59:59.259000-05:00",
        "low52w": 1.03,
        "lowPrice": 6.88,
        "openPrice": 7.64,
        "symbol": "EMH.VN",
        "symbolId": 10164524,
        "tier": "",
        "volume": 5357805
    },
    'option': {
        'VWAP': 0,
        'askPrice': None,
        'askSize': 0,
        'bidPrice': None,
        'bidSize': 0,
        'contract_type': 'call',
        'delay': 0,
        'delta': -0.212857,
        "expiry": "2021-01-15T00:00:00.000000-05:00",
        'gamma': 0.003524,
        'highPrice': 0,
        'isHalted': False,
        "key": ["WEED.TO", '2018-10-23T00:00:00.000000-04:00'],
        'lastTradePrice': 22,
        'lastTradePriceTrHrs': None,
        'lastTradeSize': 0,
        'lastTradeTick': 'Equal',
        'lastTradeTime': '2018-10-23T00:00:00.000000-04:00',
        'lowPrice': 0,
        'openInterest': 1,
        'openPrice': 0,
        'rho': -0.891868,
        "strike": 8,
        'symbol': 'WEED15Jan21P54.00.MX',
        'symbolId': 22739148,
        'theta': -0.012911,
        'underlying': 'WEED.TO',
        'underlyingId': 16529510,
        'vega': 0.220885,
        'volatility': 75.514171,
        'volume': 0
    }
}


def match_packet(symbols, quotes, feed_type='stock'):
    """Verify target ``symbols`` match keys in ``quotes`` packet.
    """
    assert len(quotes) == len(symbols)
    # for ticker in symbols:
    for quote in quotes.copy():
        assert quote['key'] in symbols
        quotes.remove(quote)

        # verify the quote packet format hasn't changed
        for key in _ex_quotes[feed_type]:
            quote.pop(key)

        # no additional fields either
        assert not quote

    # not more quotes then in target set
    assert not quotes


async def intermittently_refresh_tokens():
    async with qt.get_client() as client:
        try:
            while True:
                try:
                    log.info("REFRESHING TOKENS!")
                    await client.ensure_access(force_refresh=True)
                    await trio.sleep(0.3)
                except Exception:
                   log.exception("Token refresh failed")
        finally:
            with trio.open_cancel_scope(shield=True):
                async with qt.get_client() as client:
                    await client.ensure_access(force_refresh=True)


# XXX: demonstrates the shoddy API QT serves
@pytest.mark.skip
@tractor_test
async def test_concurrent_tokens_refresh(us_symbols, loglevel):
    async with qt.get_client() as client:

        # async with tractor.open_nursery() as n:
        #     await n.run_in_actor('other', intermittently_refresh_tokens)

        async with trio.open_nursery() as n:
            n.start_soon(intermittently_refresh_tokens)

            quoter = await qt.stock_quoter(client, us_symbols)

            async def get_quotes():
                for tries in range(10):
                    log.info(f"{tries}: GETTING QUOTES!")
                    quotes = await quoter(us_symbols)
                    await trio.sleep(0.1)

            await get_quotes()

            # shutdown
            # await n.cancel()
            n.cancel_scope.cancel()


@trio_test
async def test_batched_stock_quote(us_symbols):
    """Use the client stock quote api and verify quote response format.
    """
    async with qt.get_client() as client:
        quotes = await client.quote(us_symbols)
        assert len(quotes) == len(us_symbols)
        match_packet(us_symbols, quotes)


@trio_test
async def test_stock_quoter_context(us_symbols):
    """Test that a quoter "context" used by the data feed daemon.
    """
    async with qt.get_client() as client:
        quoter = await qt.stock_quoter(client, us_symbols)
        quotes = await quoter(us_symbols)
        match_packet(us_symbols, quotes)


@trio_test
async def test_option_contracts(tmx_symbols):
    """Verify we can retrieve contracts by expiry.
    """
    async with qt.get_client() as client:
        for symbol in tmx_symbols:
            contracts = await client.symbol2contracts(symbol)
            key, byroot = next(iter(contracts.items()))
            assert isinstance(key.id, int)
            assert isinstance(byroot, dict)
            for key in contracts:
                # check that datetime is same as reported in contract
                assert key.expiry.isoformat(
                    timespec='microseconds') == contracts[key]['expiryDate']


@trio_test
async def test_option_chain(tmx_symbols):
    """Verify we can retrieve all option chains for a list of symbols.
    """
    async with qt.get_client() as client:
        # contract lookup - should be cached
        contracts = await client.get_all_contracts([tmx_symbols[0]])
        # chains quote for all symbols
        quotes = await client.option_chains(contracts)
        # verify contents match what we expect
        for quote in quotes:
            assert quote['underlying'] in tmx_symbols
            for key in _ex_quotes['option']:
                quote.pop(key)
            assert not quote


@trio_test
async def test_option_quote_latency(tmx_symbols):
    """Audit option quote latencies.
    """
    async with qt.get_client() as client:
        # all contracts lookup - should be cached
        contracts = await client.get_all_contracts(['WEED.TO'])

        # build single expriry contract
        id, by_expiry = next(iter(contracts.items()))
        dt, by_strike = next(iter(by_expiry.items()))
        single = {id: {dt: None}}

        for expected_latency, contract in [
            # NOTE: request latency is usually 2x faster that these
            (5, contracts), (0.5, single)
        ]:
            for _ in range(3):
                # chains quote for all symbols
                start = time.time()
                await client.option_chains(contract)
                took = time.time() - start
                print(f"Request took {took}")
                assert took <= expected_latency
                await trio.sleep(0.1)


async def stream_option_chain(portal, symbols):
    """Start up an option quote stream.

    ``symbols`` arg is ignored here.
    """
    symbol = symbols[0]
    async with qt.get_client() as client:
        contracts = await client.get_all_contracts([symbol])

    contractkey = next(iter(contracts))
    subs_keys = list(
        map(lambda item: (item.symbol, item.expiry), contracts))
    sub = subs_keys[0]

    agen = await portal.run(
        'piker.brokers.data',
        'start_quote_stream',
        broker='questrade',
        symbols=[sub],
        feed_type='option',
        rate=3,
        diff_cached=False,
    )
    # latency arithmetic
    loops = 8
    period = 1/3.   # 3 rps
    timeout = loops / period

    try:
        # wait on the data streamer to actually start
        # delivering
        await agen.__anext__()

        # it'd sure be nice to have an asyncitertools here...
        with trio.fail_after(timeout):
            count = 0
            async for quotes in agen:
                # print(f'got quotes for {quotes.keys()}')
                # we should receive all calls and puts
                assert len(quotes) == len(contracts[contractkey]) * 2
                for symbol, quote in quotes.items():
                    assert quote['key'] == sub
                    for key in _ex_quotes['option']:
                        quote.pop(key)
                    assert not quote
                count += 1
                if count == loops:
                    break

        # switch the subscription and make sure
        # stream is still working
        sub = subs_keys[1]
        await agen.aclose()
        agen = await portal.run(
            'piker.brokers.data',
            'start_quote_stream',
            broker='questrade',
            symbols=[sub],
            feed_type='option',
            rate=4,
            diff_cached=False,
        )

        await agen.__anext__()
        with trio.fail_after(timeout):
            count = 0
            async for quotes in agen:
                for symbol, quote in quotes.items():
                    assert quote['key'] == sub
                count += 1
                if count == loops:
                    break
    finally:
        # unsub
        await agen.aclose()


async def stream_stocks(portal, symbols):
    """Start up a stock quote stream.
    """
    agen = await portal.run(
        'piker.brokers.data',
        'start_quote_stream',
        broker='questrade',
        symbols=symbols,
        diff_cached=False,
    )
    try:
        # it'd sure be nice to have an asyncitertools here...
        async for quotes in agen:
            assert quotes
            for key in quotes:
                assert key in symbols
            break
    finally:
        # unsub
        await agen.aclose()


@pytest.mark.parametrize(
    'stream_what',
    [
        (stream_stocks,),
        (stream_option_chain,),
        (stream_stocks, stream_option_chain),
        (stream_stocks, stream_stocks),
        (stream_option_chain, stream_option_chain),
    ],
    ids=[
        'stocks', 'options',
        'stocks_and_options', 'stocks_and_stocks',
        'options_and_options',
    ],
)
@tractor_test
async def test_quote_streaming(tmx_symbols, loglevel, stream_what):
    """Set up option streaming using the broker daemon.
    """
    async with tractor.find_actor('brokerd') as portal:
        async with tractor.open_nursery() as nursery:
            # only one per host address, spawns an actor if None
            if not portal:
                # no brokerd actor found
                portal = await nursery.start_actor(
                    'data_feed',
                    rpc_module_paths=[
                        'piker.brokers.data',
                        'piker.brokers.core'
                    ],
                )
            if len(stream_what) > 1:
                # stream disparate symbol sets per task
                first, *tail = tmx_symbols
                symbols = ([first], tail)
            else:
                symbols = [tmx_symbols]

            async with trio.open_nursery() as n:
                for syms, func in zip(symbols, stream_what):
                    n.start_soon(func, portal, syms)

            # stop all spawned subactors
            await nursery.cancel()