import pytest
from pydantic import ValidationError

from api.schemas.workflow_configurations import (
    DEFAULT_MAX_CALL_DURATION_SECONDS,
    MAX_CALL_DURATION_SECONDS,
    WorkflowConfigurationDefaults,
)


def test_max_call_duration_default_within_bounds():
    config = WorkflowConfigurationDefaults()
    assert config.max_call_duration == DEFAULT_MAX_CALL_DURATION_SECONDS


def test_max_call_duration_accepts_cap():
    config = WorkflowConfigurationDefaults(max_call_duration=MAX_CALL_DURATION_SECONDS)
    assert config.max_call_duration == MAX_CALL_DURATION_SECONDS


def test_max_call_duration_rejects_over_cap():
    with pytest.raises(ValidationError):
        WorkflowConfigurationDefaults(max_call_duration=MAX_CALL_DURATION_SECONDS + 1)


def test_max_call_duration_rejects_non_positive():
    with pytest.raises(ValidationError):
        WorkflowConfigurationDefaults(max_call_duration=0)


def test_null_values_treated_as_unset():
    """Stored configs / older clients send explicit JSON nulls for keys the
    user never configured; they must validate as defaults, not fail."""
    config = WorkflowConfigurationDefaults.model_validate(
        {
            "max_call_duration": None,
            "turn_start_strategy": None,
            "turn_start_min_words": None,
        }
    )
    assert config.max_call_duration == DEFAULT_MAX_CALL_DURATION_SECONDS
    # Nulls count as unset, so a sparse round-trip drops them entirely.
    assert config.model_dump(exclude_unset=True) == {}


def test_exclude_unset_round_trip_stays_sparse():
    config = WorkflowConfigurationDefaults.model_validate(
        {"max_call_duration": 600, "custom_extra_key": {"a": 1}}
    )
    assert config.model_dump(exclude_unset=True) == {
        "max_call_duration": 600,
        "custom_extra_key": {"a": 1},
    }


def test_cap_stays_within_concurrency_stale_timeout():
    """A call outliving the rate limiter's stale window has its concurrency
    slot purged mid-call, so the cap must never exceed it."""
    from api.services.campaign.rate_limiter import rate_limiter

    assert MAX_CALL_DURATION_SECONDS <= rate_limiter.stale_call_timeout