// waste-daemon: the local peer process.
// Run one of these on each friend's machine.
package main

import (
	"flag"
	"log"
	"os"

	"github.com/waste-go/internal/crypto"
	"github.com/waste-go/internal/ipc"
	"github.com/waste-go/internal/invite"
	"github.com/waste-go/internal/netmgr"
)

func main() {
	dataDir    := flag.String("data-dir", "~/.waste", "path to identity/config directory")
	alias      := flag.String("alias", "anon", "display name shown to peers (advisory only)")
	ipcPort    := flag.Int("ipc-port", 17337, "port for local IPC (UI connects here)")
	anchorURL  := flag.String("anchor", "", "anchor WebSocket URL, e.g. ws://your-vps:17339/ws")
	shareDir   := flag.String("share-dir", "", "directory to share with peers on the network")
	joinInvite := flag.String("join", "", "waste: invite string — sets anchor URL and auto-joins the network on startup")
	flag.Parse()

	dir := expandHome(*dataDir)

	id, err := crypto.LoadOrCreate(dir, *alias)
	if err != nil {
		log.Fatalf("identity: %v", err)
	}
	log.Printf("daemon: local peer id: %s  alias: %s", id.PeerID().Short(), id.Alias)

	// --join overrides/sets the anchor URL and triggers an auto-join.
	var autoJoinNetwork string
	if *joinInvite != "" {
		inv, err := invite.Decode(*joinInvite)
		if err != nil {
			log.Fatalf("invalid invite: %v", err)
		}
		*anchorURL = inv.Anchor
		autoJoinNetwork = inv.Network
		log.Printf("daemon: invite decoded — anchor=%s network=%s", inv.Anchor, inv.Network)
	}

	mgr := netmgr.New(netmgr.Config{
		MasterIdentity: id,
		StoreDir:       dir,
		AnchorURL:      *anchorURL,
		ShareDir:       expandHome(*shareDir),
	})

	if autoJoinNetwork != "" {
		if _, err := mgr.Join(autoJoinNetwork); err != nil {
			log.Fatalf("auto-join: %v", err)
		}
	}

	if err := ipc.Run(mgr, *ipcPort); err != nil {
		log.Fatalf("ipc: %v", err)
	}
}

func expandHome(path string) string {
	if len(path) >= 2 && path[:2] == "~/" {
		if home, err := os.UserHomeDir(); err == nil {
			return home + path[1:]
		}
	}
	return path
}