package steamcache

import (
	"runtime/debug"
	"s1d3sw1ped/SteamCache2/vfs"
	"s1d3sw1ped/SteamCache2/vfs/cachestate"
	"time"

	"golang.org/x/exp/rand"
)

func init() {
	// Set the GC percentage to 50%. This is a good balance between performance and memory usage.
	debug.SetGCPercent(50)
}

// RandomGC randomly deletes files until we've reclaimed enough space.
func randomgc(vfss vfs.VFS, size uint) (uint, uint) {
	// Randomly delete files until we've reclaimed enough space.
	random := func(vfss vfs.VFS, stats []*vfs.FileInfo) int64 {
		randfile := stats[rand.Intn(len(stats))]
		sz := randfile.Size()
		err := vfss.Delete(randfile.Name())
		if err != nil {
			return 0
		}

		return sz
	}

	deletions := 0
	targetreclaim := int64(size)
	var reclaimed int64

	stats := vfss.StatAll()
	for {
		if reclaimed >= targetreclaim {
			break
		}
		reclaimed += random(vfss, stats)
		deletions++
	}

	return uint(reclaimed), uint(deletions)
}

func cachehandler(fi *vfs.FileInfo, cs cachestate.CacheState) bool {
	return time.Since(fi.AccessTime()) < time.Second*10 // Put hot files in the fast vfs if equipped
}