"""Plan service — 套餐定义与查询。"""

from app.features.plan.catalog import (
    AVAILABLE_PLANS,
    ENABLE_TEST_PLAN,
    TEST_PLAN,
    get_plan_by_type,
    get_plans_for_api,
)
from app.features.plan.schemas import (
    CurrentPlanResponse,
    PlanResponse,
    PlanUsageResponse,
)
from app.features.quota.service import QuotaService
from app.features.user.models import User

__all__ = [
    "AVAILABLE_PLANS",
    "ENABLE_TEST_PLAN",
    "TEST_PLAN",
    "PlanService",
    "get_plan_by_type",
    "get_plans_for_api",
]


class PlanService:
    def __init__(self, quota_service: QuotaService):
        self._quota = quota_service

    def get_plans_for_api(self) -> list[PlanResponse]:
        """对外套餐列表（供 payment 等 feature 通过注入使用，不直接 import plan.service）。"""
        return get_plans_for_api()

    async def get_current_plan_response(self, user: User) -> CurrentPlanResponse:
        plan = get_plan_by_type(user.subscription_type)
        segment_count, chapter_count = await self._quota.get_usage(user.id)
        usage = PlanUsageResponse(
            conversations=segment_count,
            chapters=chapter_count,
            max_conversations=plan.max_conversations,
            max_chapters=plan.max_chapters,
        )
        expires_at = None
        if user.subscription_expires_at:
            expires_at = user.subscription_expires_at.isoformat()
        return CurrentPlanResponse(
            plan_id=plan.id,
            plan_name=plan.display_name,
            subscription_type=user.subscription_type,
            expires_at=expires_at,
            features=plan.features,
            usage=usage,
        )