"""Pytest configuration for unity-mcp tests."""
import logging
import os
import sys
from pathlib import Path
import pytest

logger = logging.getLogger(__name__)

# Add src directory to Python path so tests can import cli, transport, etc.
src_path = Path(__file__).parent.parent / "src"
if str(src_path) not in sys.path:
    sys.path.insert(0, str(src_path))


def _safe_reset_telemetry() -> None:
    """Safely reset telemetry, distinguishing import errors from reset failures."""
    try:
        from core.telemetry import reset_telemetry
    except ImportError:
        # Telemetry module not available - this is normal if telemetry not used
        return
    try:
        reset_telemetry()
    except Exception as exc:
        logger.debug("Telemetry reset failed (may indicate cleanup needed)", exc_info=exc)


@pytest.fixture(scope="module", autouse=True)
def cleanup_telemetry():
    """Clean up telemetry singleton after each test module to prevent state pollution."""
    yield
    _safe_reset_telemetry()


@pytest.fixture(scope="class")
def fresh_telemetry():
    """Reset telemetry before test class runs (for tests that need clean state)."""
    _safe_reset_telemetry()
    yield


def pytest_collection_modifyitems(session, config, items):  # noqa: ARG001
    """Reorder tests so characterization tests run before integration tests.

    This prevents integration tests from initializing the telemetry singleton
    before characterization tests can mock it.
    """
    # Separate integration tests from other tests
    integration_tests = []
    other_tests = []

    for item in items:
        # Check if test is in integration/ directory
        if "integration" in str(item.path):
            integration_tests.append(item)
        else:
            other_tests.append(item)

    # Reorder: characterization/unit tests first, then integration tests
    items[:] = other_tests + integration_tests


@pytest.fixture(autouse=True)
def restore_global_config():
    """Restore global config/env mutations between tests."""
    from core.config import config as global_config

    prior_env = os.environ.get("UNITY_MCP_TRANSPORT")
    prior = {
        "transport_mode": global_config.transport_mode,
        "http_remote_hosted": global_config.http_remote_hosted,
        "api_key_validation_url": global_config.api_key_validation_url,
        "api_key_login_url": global_config.api_key_login_url,
        "api_key_cache_ttl": global_config.api_key_cache_ttl,
        "api_key_service_token_header": global_config.api_key_service_token_header,
        "api_key_service_token": global_config.api_key_service_token,
    }
    yield

    if prior_env is None:
        os.environ.pop("UNITY_MCP_TRANSPORT", None)
    else:
        os.environ["UNITY_MCP_TRANSPORT"] = prior_env

    for key, value in prior.items():
        setattr(global_config, key, value)