package repository

import (
	"electricity_bill_calc/cache"
	"time"
)

func _postProcessSingle[T interface{}](instance *T, has bool, err error) (*T, error) {
	if err != nil {
		return nil, err
	}
	if has {
		return instance, nil
	} else {
		return nil, nil
	}
}

func _postProcessList[T interface{}](instance []*T, has bool, err error) ([]*T, error) {
	if err != nil {
		return nil, err
	}
	if has {
		return instance, nil
	} else {
		return nil, nil
	}
}

func cacheData[T interface{}](instance T, category string, key ...string) error {
	var keys = make([]string, 0)
	keys = append(keys, category)
	keys = append(keys, key...)
	cacheKey := cache.CacheKey("cache", keys...)
	if exists, _ := cache.Exists(cacheKey); exists {
		cache.Delete(cacheKey)
	}
	return cache.Cache(cacheKey, &instance, 5*time.Minute)
}

func retreiveData[T interface{}](category string, key ...string) (*T, error) {
	var keys = make([]string, 0)
	keys = append(keys, category)
	keys = append(keys, key...)
	return cache.Retreive[T](cache.CacheKey("cache", keys...))
}