"""用量统计 + 审计日志 API（admin）：/admin/api/usage、/admin/api/audit。"""
from __future__ import annotations

from typing import Optional

from fastapi import APIRouter, Depends, Query

from ..services import usage_store
from .admin import _require_admin

router = APIRouter(prefix="/admin/api", tags=["usage-audit"])


@router.get("/usage")
async def usage(
    hours: int = Query(default=24, ge=1, le=720),
    _admin: str = Depends(_require_admin),
):
    summary = usage_store.usage_summary(hours=hours)
    return _ok(summary)


@router.get("/usage/timeline")
async def usage_timeline_api(
    hours: int = Query(default=24, ge=1, le=720),
    granularity: str = Query(default="hour", pattern="^(hour|day)$"),
    _admin: str = Depends(_require_admin),
):
    timeline = usage_store.usage_timeline(hours=hours, granularity=granularity)
    return _ok({"items": timeline, "granularity": granularity})


@router.get("/audit")
async def audit(
    hours: int = Query(default=24, ge=1, le=720),
    limit: int = Query(default=100, ge=1, le=1000),
    offset: int = Query(default=0, ge=0),
    action: Optional[str] = Query(default=None),
    _admin: str = Depends(_require_admin),
):
    items = usage_store.list_audit(hours=hours, limit=limit, offset=offset, action=action)
    return _ok({"items": items, "count": len(items)})


def _ok(payload: dict):
    from ._common import ok_with_cors
    return ok_with_cors(payload)