from metadata.workflow.context.context_manager import ContextManager, ContextsEnum
from metadata.workflow.context.workflow_context import (
    WorkflowContext,
    WorkflowContextFieldsEnum,
)


def test_singleton_behavior():
    cm1 = ContextManager.get_instance()
    cm2 = ContextManager.get_instance()
    assert cm1 is cm2, "ContextManager should be a singleton"


def test_context_get_set_attr():
    service_name = "test_service"
    cm = ContextManager.get_instance()
    assert cm is not None
    # Set and get using enums
    ContextManager.set_context_attr(
        ContextsEnum.WORKFLOW, WorkflowContextFieldsEnum.SERVICE_NAME, service_name
    )
    value = ContextManager.get_context_attr(
        ContextsEnum.WORKFLOW, WorkflowContextFieldsEnum.SERVICE_NAME
    )
    assert value == service_name


def test_get_context_returns_context():
    cm = ContextManager.get_instance()
    assert cm is not None
    workflow_ctx = ContextManager.get_context(ContextsEnum.WORKFLOW)
    assert isinstance(workflow_ctx, WorkflowContext)
    # Should be the same object as returned by get_context
    assert workflow_ctx is ContextManager.get_context(ContextsEnum.WORKFLOW)


def test_thread_safety():
    import threading

    cm = ContextManager.get_instance()
    assert cm is not None

    def set_service_name(name):
        ContextManager.set_context_attr(
            ContextsEnum.WORKFLOW, WorkflowContextFieldsEnum.SERVICE_NAME, name
        )

    threads = [
        threading.Thread(target=set_service_name, args=(f"service_{i}",))
        for i in range(10)
    ]
    for t in threads:
        t.start()
    for t in threads:
        t.join()
    # The final value should be one of the set values
    final_value = ContextManager.get_context_attr(
        ContextsEnum.WORKFLOW, WorkflowContextFieldsEnum.SERVICE_NAME
    )
    assert final_value in {f"service_{i}" for i in range(10)}