package node

import (
	"context"
	"path/filepath"
	"syscall"

	"github.com/anacrolix/torrent"
	"github.com/hanwen/go-fuse/v2/fs"
	"github.com/hanwen/go-fuse/v2/fuse"
	"github.com/panjf2000/ants/v2"
)

var _ fs.NodeOnAdder = &Root{}
var _ fs.NodeGetattrer = &Root{}

type Root struct {
	fs.Inode
	pool     *ants.Pool
	torrents []*torrent.Torrent
}

func NewRoot(torrents []*torrent.Torrent, pool *ants.Pool) *Root {
	return &Root{torrents: torrents, pool: pool}
}

func (root *Root) OnAdd(ctx context.Context) {
	for _, torrent := range root.torrents {
		root.pool.Submit(func() {
			root.AddChild(
				filepath.Clean(torrent.Name()),
				root.NewPersistentInode(ctx, &Torrent{t: torrent, pool: root.pool}, fs.StableAttr{
					Mode: syscall.S_IFDIR,
				}), true)
		})
	}
}

func (root *Root) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut) syscall.Errno {
	out.Mode = syscall.S_IFDIR & 07777

	return fs.OK
}