"""stats 路由：token 统计概览"""

from fastapi import APIRouter, Depends

from ..core.db import get_pool
from ..core.deps import current_admin

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


@router.get("")
async def stats(admin: dict = Depends(current_admin)):
    pool = await get_pool()

    total = await pool.fetchval("SELECT COUNT(*) FROM mcp_token")
    active = await pool.fetchval("SELECT COUNT(*) FROM mcp_token WHERE status = 'active'")
    revoked = await pool.fetchval("SELECT COUNT(*) FROM mcp_token WHERE status = 'revoked'")

    # 各 service_scope 活跃分布
    scope_rows = await pool.fetch(
        "SELECT service_scope, COUNT(*) AS cnt FROM mcp_token WHERE status = 'active' GROUP BY service_scope"
    )
    by_scope = {r["service_scope"]: r["cnt"] for r in scope_rows}

    # 近 24h 调用次数（基于 last_used_at）
    calls_24h = await pool.fetchval(
        "SELECT COUNT(*) FROM mcp_token WHERE last_used_at > now() - interval '24 hours'"
    )

    # 近 24h 活跃客户端
    clients_24h = await pool.fetchval(
        "SELECT COUNT(DISTINCT client_id) FROM mcp_token WHERE last_used_at > now() - interval '24 hours'"
    )

    # 最近 10 条调用记录
    recent_rows = await pool.fetch(
        """SELECT token_prefix, client_id, last_used_svc, last_used_at
           FROM mcp_token WHERE last_used_at IS NOT NULL
           ORDER BY last_used_at DESC LIMIT 10"""
    )
    recent = [
        {
            "token_prefix": r["token_prefix"],
            "client_id": r["client_id"],
            "service": r["last_used_svc"],
            "last_used_at": r["last_used_at"].isoformat() if r["last_used_at"] else None,
        }
        for r in recent_rows
    ]

    return {
        "total": total,
        "active": active,
        "revoked": revoked,
        "by_scope": by_scope,
        "calls_24h": calls_24h,
        "clients_24h": clients_24h,
        "recent": recent,
    }