from fastapi import APIRouter, HTTPException
from sqlmodel import Session, select

from core.cache import auth_cache, cache
from core.database import engine
from core.settings import DATABASE_ENGINE, REDIS_ENABLED, REDIS_PREFIX, REDIS_URL
from models.bot import BotInstance

router = APIRouter()


@router.get("/api/health")
def get_health():
    try:
        with Session(engine) as session:
            session.exec(select(BotInstance).limit(1)).first()
        return {"status": "ok", "database": DATABASE_ENGINE}
    except Exception as exc:
        raise HTTPException(status_code=503, detail=f"database check failed: {exc}") from exc


@router.get("/api/health/cache")
def get_cache_health():
    redis_url = str(REDIS_URL or "").strip()
    configured = bool(REDIS_ENABLED and redis_url)
    client_enabled = bool(getattr(cache, "enabled", False))
    reachable = bool(cache.ping()) if client_enabled else False
    status = "ok"
    if configured and not reachable:
        status = "degraded"
    return {
        "status": status,
        "cache": {
            "configured": configured,
            "enabled": client_enabled,
            "reachable": reachable,
            "prefix": REDIS_PREFIX,
            "status": str(getattr(cache, "status", "") or ""),
            "detail": str(getattr(cache, "status_detail", "") or ""),
        },
        "auth_store": {
            "enabled": bool(getattr(auth_cache, "enabled", False)),
            "status": str(getattr(auth_cache, "status", "") or ""),
            "detail": str(getattr(auth_cache, "status_detail", "") or ""),
        },
    }