"""``GET /quota`` and ``GET /quota/ledger`` (架构文档 §9.3 配额).

FR-BILL-07: 额度相关文案中**不得出现任何价格、购买、会员、升级字样**。
Only two recovery paths may ever be surfaced: 等待恢复 and 做任务换额度.
"""

from __future__ import annotations

from fastapi import APIRouter, Query

from apps.api.deps import BillingServiceDep, CurrentUserId
from apps.api.schemas import LedgerEntry, QuotaResponse
from packages.agent.service import QUOTA_KEY_AGENT_CHAT
from packages.shared.response import ok

router = APIRouter(prefix="/quota", tags=["quota"])


@router.get("", summary="Current period quota for a feature")
async def get_quota(
    user_id: CurrentUserId,
    billing: BillingServiceDep,
    quota_key: str = Query(default=QUOTA_KEY_AGENT_CHAT, max_length=64),
) -> dict[str, object]:
    snapshot = await billing.get_quota(user_id=user_id, quota_key=quota_key)
    return ok(
        QuotaResponse(
            quota_key=snapshot.quota_key,
            period_key=snapshot.period_key,
            used=snapshot.used,
            limit_value=snapshot.limit_value,
            bonus_value=snapshot.bonus_value,
            remaining=snapshot.remaining,
            reset_at=snapshot.reset_at,
        ).model_dump()
    )


@router.get("/ledger", summary="Quota ledger — 流水是真相，余额是缓存")
async def get_ledger(
    user_id: CurrentUserId,
    billing: BillingServiceDep,
    limit: int = Query(default=50, ge=1, le=200),
) -> dict[str, object]:
    rows = await billing.list_ledger(user_id=user_id, limit=limit)
    return ok(
        [
            LedgerEntry(
                tx_id=str(row.tx_id),
                delta=row.delta,
                tx_type=row.tx_type,
                status=row.status,
                reason=row.reason,
                quota_key=row.quota_key,
                period_key=row.period_key,
                balance_after=row.balance_after,
                created_at=row.created_at,
            ).model_dump()
            for row in rows
        ]
    )