import os
import threading
from unittest.mock import Mock, patch

import pytest
from crewai import Agent, Crew, Task
from crewai.telemetry import Telemetry
from opentelemetry.sdk.trace import TracerProvider


@pytest.fixture(autouse=True)
def cleanup_telemetry():
    Telemetry._instance = None
    if hasattr(Telemetry, "_lock"):
        Telemetry._lock = threading.Lock()
    yield
    Telemetry._instance = None
    if hasattr(Telemetry, "_lock"):
        Telemetry._lock = threading.Lock()


@pytest.mark.parametrize(
    "env_var,value,expected_ready",
    [
        ("OTEL_SDK_DISABLED", "true", False),
        ("OTEL_SDK_DISABLED", "TRUE", False),
        ("CREWAI_DISABLE_TELEMETRY", "true", False),
        ("CREWAI_DISABLE_TELEMETRY", "TRUE", False),
        ("OTEL_SDK_DISABLED", "false", True),
        ("CREWAI_DISABLE_TELEMETRY", "false", True),
    ],
)
def test_telemetry_environment_variables(env_var, value, expected_ready):
    """Test telemetry state with different environment variable configurations."""
    # Clear all telemetry-related env vars first, then set only the one being tested
    env_overrides = {
        "OTEL_SDK_DISABLED": "false",
        "CREWAI_DISABLE_TELEMETRY": "false",
        "CREWAI_DISABLE_TRACKING": "false",
        env_var: value,
    }
    with patch.dict(os.environ, env_overrides):
        with patch("crewai.telemetry.telemetry.TracerProvider"):
            telemetry = Telemetry()
            assert telemetry.ready is expected_ready


def test_telemetry_enabled_by_default():
    """Test that telemetry is enabled by default."""
    with patch.dict(os.environ, {}, clear=True):
        with patch("crewai.telemetry.telemetry.TracerProvider"):
            telemetry = Telemetry()
            assert telemetry.ready is True


def test_set_tracer_never_installs_a_global_provider():
    """Telemetry must not hijack the process-wide TracerProvider.

    Installing it globally made every OTel-instrumented library in the host
    process export to CrewAI's collector, so the global provider must be left
    exactly as it was found whether or not an application installed one.
    """
    import opentelemetry.trace as ot

    with patch.dict(os.environ, {}, clear=True):
        before = ot.get_tracer_provider()
        telemetry = Telemetry()
        telemetry.set_tracer()
        after = ot.get_tracer_provider()

    assert after is before
    assert telemetry.trace_set is True


def test_flow_execution_span_records_crewai_version():
    tracer = Mock()
    span = Mock()
    tracer.start_span.return_value = span

    with (
        patch.dict(
            os.environ,
            {
                "CREWAI_DISABLE_TELEMETRY": "false",
                "CREWAI_DISABLE_TRACKING": "false",
                "OTEL_SDK_DISABLED": "false",
            },
        ),
        patch(
            "crewai.telemetry.telemetry.TracerProvider",
            return_value=Mock(get_tracer=Mock(return_value=tracer)),
        ),
        patch("crewai.telemetry.telemetry.version", return_value="9.9.9"),
    ):
        telemetry = Telemetry()
        telemetry.flow_execution_span("ResearchFlow", ["start", "finish"])

    tracer.start_span.assert_called_once_with("Flow Execution")
    span.set_attribute.assert_any_call("crewai_version", "9.9.9")
    span.set_attribute.assert_any_call("flow_name", "ResearchFlow")


def test_flow_creation_span_records_crewai_version():
    tracer = Mock()
    span = Mock()
    tracer.start_span.return_value = span

    with (
        patch.dict(
            os.environ,
            {
                "CREWAI_DISABLE_TELEMETRY": "false",
                "CREWAI_DISABLE_TRACKING": "false",
                "OTEL_SDK_DISABLED": "false",
            },
        ),
        patch(
            "crewai.telemetry.telemetry.TracerProvider",
            return_value=Mock(get_tracer=Mock(return_value=tracer)),
        ),
        patch("crewai.telemetry.telemetry.version", return_value="9.9.9"),
    ):
        telemetry = Telemetry()
        # Flow creation also emits a once-per-process coding_agent feature span;
        # stub it so this test stays focused on the Flow Creation span.
        with patch.object(telemetry, "coding_agent_span"):
            telemetry.flow_creation_span("ResearchFlow")

    tracer.start_span.assert_called_once_with("Flow Creation")
    span.set_attribute.assert_any_call("crewai_version", "9.9.9")
    span.set_attribute.assert_any_call("flow_name", "ResearchFlow")


@patch("crewai.telemetry.telemetry.logger.error")
@patch(
    "opentelemetry.exporter.otlp.proto.http.trace_exporter.OTLPSpanExporter.export",
    side_effect=Exception("Test exception"),
)
@pytest.mark.vcr()
def test_telemetry_fails_due_connect_timeout(export_mock, logger_mock):
    error = Exception("Test exception")
    export_mock.side_effect = error

    with patch.dict(
        os.environ, {"CREWAI_DISABLE_TELEMETRY": "false", "OTEL_SDK_DISABLED": "false"}
    ):
        telemetry = Telemetry()

        tracer = telemetry.provider.get_tracer(__name__)
        with tracer.start_as_current_span("test-span"):
            agent = Agent(
                role="agent",
                llm="gpt-4o-mini",
                goal="Just say hi",
                backstory="You are a helpful assistant that just says hi",
            )
            task = Task(
                description="Just say hi",
                expected_output="hi",
                agent=agent,
            )
            crew = Crew(agents=[agent], tasks=[task], name="TestCrew")
            crew.kickoff()

        telemetry.provider.force_flush()

    assert export_mock.called
    assert logger_mock.call_count == export_mock.call_count
    for call in logger_mock.call_args_list:
        assert call[0][0] == error


@pytest.mark.telemetry
def test_telemetry_singleton_pattern():
    """Test that Telemetry uses the singleton pattern correctly."""
    Telemetry._instance = None

    telemetry1 = Telemetry()
    telemetry2 = Telemetry()

    assert telemetry1 is telemetry2

    telemetry1.test_attribute = "test_value"
    assert hasattr(telemetry2, "test_attribute")
    assert telemetry2.test_attribute == "test_value"

    import threading

    instances = []

    def create_instance():
        instances.append(Telemetry())

    threads = [threading.Thread(target=create_instance) for _ in range(5)]
    for thread in threads:
        thread.start()
    for thread in threads:
        thread.join()

    assert all(instance is telemetry1 for instance in instances)


def test_no_signal_handler_traceback_in_non_main_thread():
    """Signal handler registration should be silently skipped in non-main threads.

    Regression test for https://github.com/crewAIInc/crewAI/issues/4289
    """
    errors: list[Exception] = []
    mock_holder: dict = {}

    def init_in_thread():
        try:
            Telemetry._instance = None
            with (
                patch.dict(
                    os.environ,
                    {"CREWAI_DISABLE_TELEMETRY": "false", "OTEL_SDK_DISABLED": "false"},
                ),
                patch("crewai.telemetry.telemetry.TracerProvider"),
                patch("signal.signal") as mock_signal,
                patch("crewai.telemetry.telemetry.logger") as mock_logger,
            ):
                Telemetry()
                mock_holder["signal"] = mock_signal
                mock_holder["logger"] = mock_logger
        except Exception as exc:
            errors.append(exc)

    thread = threading.Thread(target=init_in_thread)
    thread.start()
    thread.join()

    assert not errors, f"Unexpected error: {errors}"
    assert mock_holder, "Thread did not execute"
    mock_holder["signal"].assert_not_called()
    mock_holder["logger"].debug.assert_any_call(
        "Skipping signal handler registration: not running in main thread"
    )


def test_hook_dispatched_span_counts_point_usage():
    with (
        patch.dict(
            os.environ,
            {
                "CREWAI_DISABLE_TELEMETRY": "false",
                "CREWAI_DISABLE_TRACKING": "false",
                "OTEL_SDK_DISABLED": "false",
            },
        ),
        patch("crewai.telemetry.telemetry.TracerProvider"),
    ):
        telemetry = Telemetry()
        with patch.object(telemetry, "feature_usage_span") as feature_usage_span:
            telemetry.hook_dispatched_span("pre_tool_call", "proceeded")

    feature_usage_span.assert_called_once_with("hooks:pre_tool_call")


def test_hook_dispatched_span_counts_aborts():
    with (
        patch.dict(
            os.environ,
            {
                "CREWAI_DISABLE_TELEMETRY": "false",
                "CREWAI_DISABLE_TRACKING": "false",
                "OTEL_SDK_DISABLED": "false",
            },
        ),
        patch("crewai.telemetry.telemetry.TracerProvider"),
    ):
        telemetry = Telemetry()
        with patch.object(telemetry, "feature_usage_span") as feature_usage_span:
            telemetry.hook_dispatched_span("pre_tool_call", "aborted")

    feature_usage_span.assert_any_call("hooks:pre_tool_call")
    feature_usage_span.assert_any_call("hooks:aborted")
    assert feature_usage_span.call_count == 2


def test_event_listener_tracks_hook_dispatched_events():
    from crewai.events.event_bus import crewai_event_bus
    from crewai.events.event_listener import event_listener
    from crewai.events.types.hook_events import HookDispatchedEvent

    with (
        crewai_event_bus.scoped_handlers(),
        patch.object(
            event_listener._telemetry,
            "hook_dispatched_span",
        ) as hook_dispatched_span,
    ):
        event_listener.setup_listeners(crewai_event_bus)
        crewai_event_bus.emit(
            "test",
            HookDispatchedEvent(
                interception_point="pre_tool_call",
                outcome="aborted",
                hook_count=1,
                duration_ms=1.5,
            ),
        )
        crewai_event_bus.flush()

    hook_dispatched_span.assert_called_once_with(
        interception_point="pre_tool_call",
        outcome="aborted",
    )