import json
import hashlib
from django.core.cache import caches

_cache = caches['default']

CACHE_TIMEOUT = 900


def _make_cache_key(prefix, *args, **kwargs):
    raw = json.dumps({'args': args, 'kwargs': kwargs}, sort_keys=True, default=str)
    suffix = hashlib.md5(raw.encode('utf-8')).hexdigest()
    return f'currency_{prefix}_{suffix}'


def get_cached_data(prefix, *args, **kwargs):
    cache_key = _make_cache_key(prefix, *args, **kwargs)
    return _cache.get(cache_key)


def set_cached_data(prefix, data, *args, timeout=CACHE_TIMEOUT, **kwargs):
    cache_key = _make_cache_key(prefix, *args, **kwargs)
    _cache.set(cache_key, data, timeout=timeout)


def delete_cached_data(prefix, *args, **kwargs):
    cache_key = _make_cache_key(prefix, *args, **kwargs)
    _cache.delete(cache_key)