// Copyright 2023 ROC. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.

package conf

import (
	"fmt"

	"github.com/alimy/tryst/cache"
	"github.com/rocboss/paopao-ce/pkg/types"
)

const (
	_defaultKeyPoolSize = 128
)

// 以下包含一些在cache中会用到的key的前缀
const (
	PrefixNewestTweets       = "paopao:newesttweets:"
	PrefixHotsTweets         = "paopao:hotstweets:"
	PrefixFollowingTweets    = "paopao:followingtweets:"
	PrefixUserTweets         = "paopao:usertweets:"
	PrefixUnreadmsg          = "paopao:unreadmsg:"
	PrefixOnlineUser         = "paopao:onlineuser:"
	PrefixIdxTweetsNewest    = "paopao:index:tweets:newest:"
	PrefixIdxTweetsHots      = "paopao:index:tweets:hots:"
	PrefixIdxTweetsFollowing = "paopao:index:tweets:following:"
	KeySiteStatus            = "paopao:sitestatus"
	KeyHistoryMaxOnline      = "history.max.online"
)

// 以下包含一些在cache中会用到的池化后的key
var (
	KeyNewestTweets    cache.KeyPool[int]
	KeyHotsTweets      cache.KeyPool[int]
	KeyFollowingTweets cache.KeyPool[string]
	KeyUnreadMsg       cache.KeyPool[int64]
	KeyOnlineUser      cache.KeyPool[int64]
)

func initCacheKeyPool() {
	poolSize := _defaultKeyPoolSize
	if poolSize < CacheSetting.KeyPoolSize {
		poolSize = CacheSetting.KeyPoolSize
	}
	KeyNewestTweets = intKeyPool[int](poolSize, PrefixNewestTweets)
	KeyHotsTweets = intKeyPool[int](poolSize, PrefixHotsTweets)
	KeyFollowingTweets = strKeyPool(poolSize, PrefixFollowingTweets)
	KeyUnreadMsg = intKeyPool[int64](poolSize, PrefixUnreadmsg)
	KeyOnlineUser = intKeyPool[int64](poolSize, PrefixOnlineUser)
}

func strKeyPool(size int, prefix string) cache.KeyPool[string] {
	return cache.MustKeyPool(size, func(key string) string {
		return fmt.Sprintf("%s%s", prefix, key)
	})
}

func intKeyPool[T types.Integer](size int, prefix string) cache.KeyPool[T] {
	return cache.MustKeyPool[T](size, intKey[T](prefix))
}

func intKey[T types.Integer](prefix string) func(T) string {
	return func(key T) string {
		return fmt.Sprintf("%s%d", prefix, key)
	}
}