"""Tests for proxy token/cache mode normalization."""

import pytest

from headroom.proxy.modes import (
    PROXY_MODE_CACHE,
    PROXY_MODE_TOKEN,
    is_cache_mode,
    is_token_mode,
    normalize_proxy_mode,
)


def test_proxy_mode_normalizes_canonical_values() -> None:
    assert normalize_proxy_mode("token") == PROXY_MODE_TOKEN
    assert normalize_proxy_mode("cache") == PROXY_MODE_CACHE


def test_proxy_mode_normalizes_legacy_aliases() -> None:
    assert normalize_proxy_mode("token_headroom") == PROXY_MODE_TOKEN
    assert normalize_proxy_mode("token_savings") == PROXY_MODE_TOKEN
    assert normalize_proxy_mode("cost_savings") == PROXY_MODE_CACHE
    assert normalize_proxy_mode("cache_mode") == PROXY_MODE_CACHE


def test_proxy_mode_invalid_falls_back_to_default() -> None:
    assert normalize_proxy_mode("wat", default=PROXY_MODE_CACHE) == PROXY_MODE_CACHE


def test_proxy_mode_predicates() -> None:
    assert is_token_mode("token_headroom") is True
    assert is_cache_mode("cost_savings") is True


def test_stats_reports_configured_mode_for_compression_cache() -> None:
    pytest.importorskip("fastapi")
    from fastapi.testclient import TestClient

    from headroom.proxy.server import ProxyConfig, create_app

    app = create_app(
        ProxyConfig(
            mode="cache",
            optimize=False,
            cache_enabled=False,
            rate_limit_enabled=False,
            cost_tracking_enabled=False,
            log_requests=False,
            ccr_inject_tool=False,
            ccr_handle_responses=False,
            ccr_context_tracking=False,
        )
    )

    with TestClient(app) as client:
        response = client.get("/stats")
        assert response.status_code == 200
        data = response.json()
        assert data["compression_cache"]["mode"] == "cache"