from fastapi import APIRouter
import aiofiles
import json
from async_lru import alru_cache

router = APIRouter(prefix='/api/v1', tags=['tariffs'])

@alru_cache(maxsize=1, ttl=86400)
async def get_tariffs():
    async with aiofiles.open('data/tariffs.json', 'r', encoding='utf-8') as f:
        content = await f.read()
    return json.loads(content)

@router.get('/tariffs')
async def get_tariffs():
    return await get_tariffs()