"""REST: системная статистика и сводный статус."""
from __future__ import annotations

import os

from fastapi import APIRouter

from ..runtime import runtime
from ..services.system import system_stats

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

VERSION_FILE = os.environ.get("NVR_VERSION_FILE", "/app/VERSION")


def app_version() -> str:
    try:
        with open(VERSION_FILE, "r", encoding="utf-8") as fh:
            return fh.read().strip()
    except OSError:
        return "0.0.0"


@router.get("/system")
async def get_system() -> dict:
    stats = system_stats(runtime.config)
    stats["cameras"] = [s.to_dict() for s in runtime.supervisor.statuses()]
    stats["archive_size_bytes"] = await runtime.db.total_size()
    stats["version"] = app_version()
    return stats


@router.get("/health")
async def health() -> dict:
    return {"status": "ok"}