// Copyright 2023 beego-dev
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
	"context"
	"fmt"
	"github.com/beego/beego/v2/client/cache"
	"math/rand"
	"time"
)

func main() {
	mc := cache.NewMemoryCache()
	// use the default strategy which will generate random time offset (range: [3s,8s)) expired
	c := cache.NewRandomExpireCache(mc)
	// so the expiration will be [1m3s, 1m8s)
	err := c.Put(context.Background(), "hello", "world", time.Minute)
	if err != nil {
		panic(err)
	}

	c = cache.NewRandomExpireCache(mc,
		// based on the expiration
		cache.WithRandomExpireOffsetFunc(func() time.Duration {
			val := rand.Int31n(100)
			fmt.Printf("calculate offset %d", val)
			return time.Duration(val) * time.Second
		}))

	// so the expiration will be [1m0s, 1m100s)
	err = c.Put(context.Background(), "hello", "world", time.Minute)
	if err != nil {
		panic(err)
	}
}
