"""Plan-based engine gating and the expanded /languages endpoint."""

import pytest

from models.subscription import PlanType
from routes.translate_routes import (
    _allowed_providers_for_plan,
    _image_translation_allowed_for_plan,
    _plan_from_user,
)


class _FakeUser:
    def __init__(self, plan):
        self.plan = plan


class TestAllowedProviders:
    def test_free_gets_google_only(self):
        assert _allowed_providers_for_plan(PlanType.FREE) == {"google"}

    def test_starter_adds_deepl(self):
        assert _allowed_providers_for_plan(PlanType.STARTER) == {"google", "deepl"}

    def test_pro_adds_cloud_and_openrouter(self):
        allowed = _allowed_providers_for_plan(PlanType.PRO)
        assert {"google_cloud", "openrouter"} <= allowed
        assert "openai" not in allowed

    def test_business_adds_premium_and_xai(self):
        allowed = _allowed_providers_for_plan(PlanType.BUSINESS)
        assert {"openrouter_premium", "openai", "zai"} <= allowed

    def test_enterprise_has_all(self):
        enterprise = _allowed_providers_for_plan(PlanType.ENTERPRISE)
        assert enterprise >= _allowed_providers_for_plan(PlanType.BUSINESS)


class TestImageTranslationGate:
    @pytest.mark.parametrize("plan", [PlanType.FREE, PlanType.STARTER])
    def test_refused_below_pro(self, plan):
        assert _image_translation_allowed_for_plan(plan) is False

    @pytest.mark.parametrize("plan", [PlanType.PRO, PlanType.BUSINESS, PlanType.ENTERPRISE])
    def test_allowed_from_pro(self, plan):
        assert _image_translation_allowed_for_plan(plan) is True


class TestPlanFromUser:
    def test_anonymous_is_free(self):
        assert _plan_from_user(None) is PlanType.FREE

    def test_enum_plan_passthrough(self):
        assert _plan_from_user(_FakeUser(PlanType.PRO)) is PlanType.PRO

    def test_string_plan_accepted(self):
        assert _plan_from_user(_FakeUser("pro")) is PlanType.PRO

    def test_garbage_falls_back_to_free(self):
        assert _plan_from_user(_FakeUser("nonsense")) is PlanType.FREE


class TestLanguagesEndpoint:
    @pytest.mark.asyncio
    async def test_exposes_at_least_60_languages(self):
        from routes.legacy_routes import get_supported_languages

        response = await get_supported_languages()
        langs = response["supported_languages"]
        assert response["count"] >= 60
        assert len(langs) >= 60

    @pytest.mark.asyncio
    async def test_no_auto_and_canonical_chinese(self):
        from routes.legacy_routes import get_supported_languages

        langs = (await get_supported_languages())["supported_languages"]
        assert "auto" not in langs
        assert "zh-CN" in langs and "zh-TW" in langs

    @pytest.mark.asyncio
    async def test_every_language_has_a_name(self):
        from routes.legacy_routes import get_supported_languages

        langs = (await get_supported_languages())["supported_languages"]
        assert all(name and name != code.upper() for code, name in langs.items())