// steamcache/gc.go
package steamcache

import (
	"s1d3sw1ped/SteamCache2/vfs"
	"s1d3sw1ped/SteamCache2/vfs/cachestate"
	"s1d3sw1ped/SteamCache2/vfs/disk"
	"s1d3sw1ped/SteamCache2/vfs/memory"
	"time"
)

// lruGC deletes files in LRU order until enough space is reclaimed.
func lruGC(vfss vfs.VFS, size uint) {
	deletions := 0
	var reclaimed uint

	for reclaimed < size {
		switch fs := vfss.(type) {
		case *disk.DiskFS:
			fi := fs.LRU.Back()
			if fi == nil {
				break
			}
			sz := uint(fi.Size())
			err := fs.Delete(fi.Name())
			if err != nil {
				continue
			}
			reclaimed += sz
			deletions++
		case *memory.MemoryFS:
			fi := fs.LRU.Back()
			if fi == nil {
				break
			}
			sz := uint(fi.Size())
			err := fs.Delete(fi.Name())
			if err != nil {
				continue
			}
			reclaimed += sz
			deletions++
		default:
			// Fallback to old method if not supported
			stats := vfss.StatAll()
			if len(stats) == 0 {
				break
			}
			fi := stats[0] // Assume sorted or pick first
			sz := uint(fi.Size())
			err := vfss.Delete(fi.Name())
			if err != nil {
				continue
			}
			reclaimed += sz
			deletions++
		}
	}
}

func cachehandler(fi *vfs.FileInfo, cs cachestate.CacheState) bool {
	return time.Since(fi.AccessTime()) < time.Second*60 // Put hot files in the fast vfs if equipped
}