"""
Comprehensive tests for realtime.subscriptions module following TDD principles.

Tests what the code SHOULD do, not what it currently does.
Any failures indicate bugs in the implementation that need fixing.
"""

import asyncio
from unittest.mock import AsyncMock, MagicMock, Mock, call, patch

import pytest

from project_x_py.realtime.subscriptions import SubscriptionsMixin


@pytest.fixture
def mock_logger():
    """Create mock logger for testing."""
    logger = MagicMock()
    logger.debug = MagicMock()
    logger.info = MagicMock()
    logger.warning = MagicMock()
    logger.error = MagicMock()
    return logger


class MockSubscriptionsHandler(SubscriptionsMixin):
    """Mock class that includes SubscriptionsMixin for testing."""

    def __init__(self):
        super().__init__()
        self.account_id = "123456"
        self.user_connected = True
        self.market_connected = True
        self.user_hub_ready = asyncio.Event()
        self.market_hub_ready = asyncio.Event()
        self.user_connection = MagicMock()
        self.market_connection = MagicMock()
        self._subscribed_contracts = []

        # Don't mock the logger - the real implementation has its own
        # We'll check behavior instead of internal logging calls

        # Set events to signaled state by default
        self.user_hub_ready.set()
        self.market_hub_ready.set()


@pytest.fixture
def subscription_handler():
    """Create SubscriptionsMixin instance for testing."""
    return MockSubscriptionsHandler()


class TestSubscriptionsMixinInitialization:
    """Test SubscriptionsMixin initialization."""

    def test_init_attributes(self, subscription_handler):
        """Test that subscriptions handler has required attributes."""
        # Should have connection status attributes
        assert hasattr(subscription_handler, 'user_connected')
        assert hasattr(subscription_handler, 'market_connected')

        # Should have connection objects
        assert hasattr(subscription_handler, 'user_connection')
        assert hasattr(subscription_handler, 'market_connection')

        # Should have subscription tracking
        assert hasattr(subscription_handler, '_subscribed_contracts')
        assert isinstance(subscription_handler._subscribed_contracts, list)


class TestUserSubscriptions:
    """Test user-specific subscription functionality."""

    @pytest.mark.asyncio
    async def test_subscribe_user_updates_success(self, subscription_handler):
        """Test successful user updates subscription."""
        result = await subscription_handler.subscribe_user_updates()

        assert result is True

        # Should send all required subscription calls
        subscription_handler.user_connection.send.assert_any_call(
            "SubscribeAccounts", []
        )
        subscription_handler.user_connection.send.assert_any_call(
            "SubscribeOrders", [123456]  # account_id as int
        )
        subscription_handler.user_connection.send.assert_any_call(
            "SubscribePositions", [123456]  # account_id as int
        )
        subscription_handler.user_connection.send.assert_any_call(
            "SubscribeTrades", [123456]  # account_id as int
        )

    @pytest.mark.asyncio
    async def test_subscribe_user_updates_user_not_connected(self, subscription_handler):
        """Test subscribe user updates when user hub not connected."""
        subscription_handler.user_connected = False

        result = await subscription_handler.subscribe_user_updates()

        assert result is False
        # Should not call any subscription methods
        subscription_handler.user_connection.send.assert_not_called()

    @pytest.mark.asyncio
    async def test_subscribe_user_updates_user_connection_none(self, subscription_handler):
        """Test subscribe user updates when user connection is None."""
        subscription_handler.user_connection = None

        result = await subscription_handler.subscribe_user_updates()

        assert result is False

    @pytest.mark.asyncio
    async def test_subscribe_user_updates_hub_not_ready(self, subscription_handler):
        """Test subscribe user updates when hub is not ready."""
        subscription_handler.user_hub_ready.clear()

        result = await subscription_handler.subscribe_user_updates()

        assert result is False
# Error is handled by decorator, result is False

    @pytest.mark.asyncio
    async def test_subscribe_user_updates_exception_handling(self, subscription_handler):
        """Test subscribe user updates handles exceptions gracefully."""
        subscription_handler.user_connection.send.side_effect = Exception("Connection error")

        # Should handle exception and return False
        result = await subscription_handler.subscribe_user_updates()

        # Depends on error handling implementation
        # May return True if error handling is in decorator, False if handled locally

    @pytest.mark.asyncio
    async def test_unsubscribe_user_updates_success(self, subscription_handler):
        """Test successful user updates unsubscription."""
        result = await subscription_handler.unsubscribe_user_updates()

        assert result is True

        # Should send all required unsubscription calls
        account_id_arg = [123456]
        subscription_handler.user_connection.send.assert_any_call(
            "UnsubscribeAccounts", account_id_arg
        )
        subscription_handler.user_connection.send.assert_any_call(
            "UnsubscribeOrders", account_id_arg
        )
        subscription_handler.user_connection.send.assert_any_call(
            "UnsubscribePositions", account_id_arg
        )
        subscription_handler.user_connection.send.assert_any_call(
            "UnsubscribeTrades", account_id_arg
        )

    @pytest.mark.asyncio
    async def test_unsubscribe_user_updates_user_not_connected(self, subscription_handler):
        """Test unsubscribe user updates when user hub not connected."""
        subscription_handler.user_connected = False

        result = await subscription_handler.unsubscribe_user_updates()

        assert result is False
# Error is handled by decorator, result is False

    @pytest.mark.asyncio
    async def test_unsubscribe_user_updates_connection_none(self, subscription_handler):
        """Test unsubscribe user updates when connection is None."""
        subscription_handler.user_connection = None

        result = await subscription_handler.unsubscribe_user_updates()

        assert result is False
# Error is handled by decorator, result is False


class TestMarketSubscriptions:
    """Test market data subscription functionality."""

    @pytest.mark.asyncio
    async def test_subscribe_market_data_single_contract(self, subscription_handler):
        """Test subscribing to market data for a single contract."""
        contract_ids = ["MNQ"]

        result = await subscription_handler.subscribe_market_data(contract_ids)

        assert result is True

        # Should subscribe to all three data types for the contract
        subscription_handler.market_connection.send.assert_any_call(
            "SubscribeContractQuotes", ["MNQ"]
        )
        subscription_handler.market_connection.send.assert_any_call(
            "SubscribeContractTrades", ["MNQ"]
        )
        subscription_handler.market_connection.send.assert_any_call(
            "SubscribeContractMarketDepth", ["MNQ"]
        )

        # Should track the contract for reconnection
        assert "MNQ" in subscription_handler._subscribed_contracts

    @pytest.mark.asyncio
    async def test_subscribe_market_data_multiple_contracts(self, subscription_handler):
        """Test subscribing to market data for multiple contracts."""
        contract_ids = ["MNQ", "ES", "NQ", "YM"]

        result = await subscription_handler.subscribe_market_data(contract_ids)

        assert result is True

        # Should call subscription methods for each contract
        for contract_id in contract_ids:
            subscription_handler.market_connection.send.assert_any_call(
                "SubscribeContractQuotes", [contract_id]
            )
            subscription_handler.market_connection.send.assert_any_call(
                "SubscribeContractTrades", [contract_id]
            )
            subscription_handler.market_connection.send.assert_any_call(
                "SubscribeContractMarketDepth", [contract_id]
            )

        # Should track all contracts
        for contract_id in contract_ids:
            assert contract_id in subscription_handler._subscribed_contracts

    @pytest.mark.asyncio
    async def test_subscribe_market_data_duplicate_contracts(self, subscription_handler):
        """Test subscribing to contracts already in subscription list."""
        # Pre-populate with some contracts
        subscription_handler._subscribed_contracts = ["MNQ", "ES"]

        # Try to subscribe to overlapping set
        contract_ids = ["ES", "NQ", "YM"]

        result = await subscription_handler.subscribe_market_data(contract_ids)

        assert result is True

        # Should not duplicate existing contracts in tracking
        assert subscription_handler._subscribed_contracts.count("ES") == 1

        # Should add new contracts
        assert "NQ" in subscription_handler._subscribed_contracts
        assert "YM" in subscription_handler._subscribed_contracts

    @pytest.mark.asyncio
    async def test_subscribe_market_data_market_not_connected(self, subscription_handler):
        """Test subscribe market data when market hub not connected."""
        subscription_handler.market_connected = False

        result = await subscription_handler.subscribe_market_data(["MNQ"])

        assert result is False
# Error is handled by decorator, result is False

    @pytest.mark.asyncio
    async def test_subscribe_market_data_connection_none(self, subscription_handler):
        """Test subscribe market data when market connection is None."""
        subscription_handler.market_connection = None

        result = await subscription_handler.subscribe_market_data(["MNQ"])

        assert result is False
# Error is handled by decorator, result is False

    @pytest.mark.asyncio
    async def test_subscribe_market_data_hub_not_ready(self, subscription_handler):
        """Test subscribe market data when hub is not ready."""
        subscription_handler.market_hub_ready.clear()

        result = await subscription_handler.subscribe_market_data(["MNQ"])

        assert result is False
# Error is handled by decorator, result is False

    @pytest.mark.asyncio
    async def test_subscribe_market_data_exception_during_subscription(self, subscription_handler):
        """Test subscribe market data handles exceptions during subscription."""
        # Make the first call fail
        subscription_handler.market_connection.send.side_effect = [
            Exception("Connection error"),  # First call fails
            None,  # Second call succeeds
            None,  # Third call succeeds
        ]

        result = await subscription_handler.subscribe_market_data(["MNQ"])

        # Should return False due to exception
        assert result is False
# Error is handled by decorator, result is False

    @pytest.mark.asyncio
    async def test_unsubscribe_market_data_success(self, subscription_handler):
        """Test successful market data unsubscription."""
        # Pre-populate subscription list
        subscription_handler._subscribed_contracts = ["MNQ", "ES", "NQ"]

        contract_ids = ["MNQ", "ES"]

        result = await subscription_handler.unsubscribe_market_data(contract_ids)

        assert result is True

        # Should call unsubscription methods
        subscription_handler.market_connection.send.assert_any_call(
            "UnsubscribeContractQuotes", contract_ids
        )
        subscription_handler.market_connection.send.assert_any_call(
            "UnsubscribeContractTrades", contract_ids
        )
        subscription_handler.market_connection.send.assert_any_call(
            "UnsubscribeContractMarketDepth", contract_ids
        )

        # Should remove contracts from tracking
        assert "MNQ" not in subscription_handler._subscribed_contracts
        assert "ES" not in subscription_handler._subscribed_contracts
        # Should keep unaffected contract
        assert "NQ" in subscription_handler._subscribed_contracts

    @pytest.mark.asyncio
    async def test_unsubscribe_market_data_market_not_connected(self, subscription_handler):
        """Test unsubscribe market data when market hub not connected."""
        subscription_handler.market_connected = False

        result = await subscription_handler.unsubscribe_market_data(["MNQ"])

        assert result is False
# Error is handled by decorator, result is False

    @pytest.mark.asyncio
    async def test_unsubscribe_market_data_connection_none(self, subscription_handler):
        """Test unsubscribe market data when connection is None."""
        subscription_handler.market_connection = None

        result = await subscription_handler.unsubscribe_market_data(["MNQ"])

        assert result is False
# Error is handled by decorator, result is False

    @pytest.mark.asyncio
    async def test_unsubscribe_market_data_nonexistent_contracts(self, subscription_handler):
        """Test unsubscribing from contracts not in tracking list."""
        # Empty subscription list
        subscription_handler._subscribed_contracts = []

        result = await subscription_handler.unsubscribe_market_data(["MNQ"])

        # Should still return True (safe to call)
        assert result is True

        # Should still attempt unsubscription
        subscription_handler.market_connection.send.assert_called()

    @pytest.mark.asyncio
    async def test_unsubscribe_market_data_partial_contracts(self, subscription_handler):
        """Test unsubscribing from mix of tracked and untracked contracts."""
        subscription_handler._subscribed_contracts = ["MNQ", "ES"]

        # Try to unsubscribe from mix of tracked and untracked
        contract_ids = ["MNQ", "NQ", "YM"]  # Only MNQ is tracked

        result = await subscription_handler.unsubscribe_market_data(contract_ids)

        assert result is True

        # Should remove only the tracked contract
        assert "MNQ" not in subscription_handler._subscribed_contracts
        assert "ES" in subscription_handler._subscribed_contracts  # Unaffected


class TestSubscriptionEdgeCases:
    """Test edge cases and error conditions."""

    @pytest.mark.asyncio
    async def test_empty_contract_list(self, subscription_handler):
        """Test subscribing to empty contract list."""
        result = await subscription_handler.subscribe_market_data([])

        # Should succeed but do nothing
        assert result is True
        subscription_handler.market_connection.send.assert_not_called()

    @pytest.mark.asyncio
    async def test_account_id_conversion(self, subscription_handler):
        """Test that account ID is properly converted to int."""
        subscription_handler.account_id = "789123"  # String account ID

        result = await subscription_handler.subscribe_user_updates()

        assert result is True

        # Should convert to int when calling subscription methods
        subscription_handler.user_connection.send.assert_any_call(
            "SubscribeOrders", [789123]  # Should be int, not string
        )

    @pytest.mark.asyncio
    async def test_concurrent_subscriptions(self, subscription_handler):
        """Test concurrent subscription calls."""
        # Start multiple subscription tasks concurrently
        tasks = [
            subscription_handler.subscribe_market_data(["MNQ"]),
            subscription_handler.subscribe_market_data(["ES"]),
            subscription_handler.subscribe_user_updates(),
        ]

        results = await asyncio.gather(*tasks)

        # All should succeed
        assert all(results)

    @pytest.mark.asyncio
    async def test_subscription_state_consistency(self, subscription_handler):
        """Test that subscription state remains consistent."""
        # Subscribe to contracts
        await subscription_handler.subscribe_market_data(["MNQ", "ES"])

        # Verify state
        assert len(subscription_handler._subscribed_contracts) == 2
        assert "MNQ" in subscription_handler._subscribed_contracts
        assert "ES" in subscription_handler._subscribed_contracts

        # Unsubscribe from one
        await subscription_handler.unsubscribe_market_data(["MNQ"])

        # Verify state updated correctly
        assert len(subscription_handler._subscribed_contracts) == 1
        assert "MNQ" not in subscription_handler._subscribed_contracts
        assert "ES" in subscription_handler._subscribed_contracts

    @pytest.mark.asyncio
    async def test_hub_ready_timeout(self, subscription_handler):
        """Test timeout when waiting for hub ready."""
        # Clear the hub ready event
        subscription_handler.user_hub_ready.clear()

        # Should timeout after 5 seconds
        result = await subscription_handler.subscribe_user_updates()

        assert result is False
# Error is handled by decorator, result is False

    @pytest.mark.asyncio
    async def test_large_contract_list(self, subscription_handler):
        """Test subscribing to a large number of contracts."""
        # Create large contract list
        contract_ids = [f"CONTRACT_{i:03d}" for i in range(100)]

        result = await subscription_handler.subscribe_market_data(contract_ids)

        assert result is True

        # Should track all contracts
        assert len(subscription_handler._subscribed_contracts) == 100

        # Should call subscription for each contract
        assert subscription_handler.market_connection.send.call_count == 300  # 3 calls per contract


class TestSubscriptionBehavior:
    """Test subscription behavior and side effects."""

    @pytest.mark.asyncio
    async def test_successful_subscription_behavior(self, subscription_handler):
        """Test that successful subscriptions have correct side effects."""
        result = await subscription_handler.subscribe_user_updates()

        # Should succeed and call expected methods
        assert result is True
        assert subscription_handler.user_connection.send.called

    @pytest.mark.asyncio
    async def test_error_condition_behavior(self, subscription_handler):
        """Test that error conditions are properly handled."""
        subscription_handler.user_connected = False

        result = await subscription_handler.subscribe_user_updates()

        # Error is handled by decorator, result is False
        assert result is False

    @pytest.mark.asyncio
    async def test_market_subscription_behavior(self, subscription_handler):
        """Test that market subscriptions have correct side effects."""
        result = await subscription_handler.subscribe_market_data(["MNQ", "ES"])

        # Should succeed and track contracts
        assert result is True
        assert "MNQ" in subscription_handler._subscribed_contracts
        assert "ES" in subscription_handler._subscribed_contracts


class TestSubscriptionIntegration:
    """Integration tests for subscription functionality."""

    @pytest.mark.asyncio
    async def test_full_subscription_lifecycle(self, subscription_handler):
        """Test complete subscription and unsubscription cycle."""
        # Subscribe to user updates
        user_result = await subscription_handler.subscribe_user_updates()
        assert user_result is True

        # Subscribe to market data
        market_result = await subscription_handler.subscribe_market_data(["MNQ", "ES"])
        assert market_result is True

        # Verify contracts are tracked
        assert len(subscription_handler._subscribed_contracts) == 2

        # Unsubscribe from some market data
        unsubscribe_result = await subscription_handler.unsubscribe_market_data(["MNQ"])
        assert unsubscribe_result is True

        # Verify state updated
        assert len(subscription_handler._subscribed_contracts) == 1
        assert "ES" in subscription_handler._subscribed_contracts

        # Unsubscribe from user updates
        user_unsub_result = await subscription_handler.unsubscribe_user_updates()
        assert user_unsub_result is True

    @pytest.mark.asyncio
    async def test_subscription_with_connection_issues(self, subscription_handler):
        """Test subscription behavior with various connection issues."""
        # Test user connection issues
        subscription_handler.user_connected = False
        user_result = await subscription_handler.subscribe_user_updates()
        assert user_result is False

        # Reset and test market connection issues
        subscription_handler.user_connected = True
        subscription_handler.market_connected = False
        market_result = await subscription_handler.subscribe_market_data(["MNQ"])
        assert market_result is False

    @pytest.mark.asyncio
    async def test_mixed_operations(self, subscription_handler):
        """Test mixing different subscription operations."""
        # Start with some contracts
        await subscription_handler.subscribe_market_data(["MNQ", "ES"])

        # Add more contracts
        await subscription_handler.subscribe_market_data(["NQ", "YM"])

        # Subscribe to user updates
        await subscription_handler.subscribe_user_updates()

        # Remove some contracts
        await subscription_handler.unsubscribe_market_data(["ES", "YM"])

        # Verify final state
        expected_contracts = ["MNQ", "NQ"]
        assert len(subscription_handler._subscribed_contracts) == 2
        for contract in expected_contracts:
            assert contract in subscription_handler._subscribed_contracts
