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

import (
	"context"
	"flag"
	"log"
	"os"

	"github.com/waste-go/internal/anchor"
	"github.com/waste-go/internal/crypto"
	"github.com/waste-go/internal/ipc"
	"github.com/waste-go/internal/mesh"
	"github.com/waste-go/internal/proto"
)

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")
	flag.Parse()

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

	m := mesh.New(id)

	// joinFn is passed to the IPC layer; it's called when the UI sends join_network.
	joinFn := func(ctx context.Context, networkName string) {
		if *anchorURL == "" {
			log.Printf("daemon: join_network: no -anchor flag set")
			m.Emit(proto.IpcMessage{Type: proto.EvtError, ErrorMessage: "no anchor configured — start daemon with -anchor <url>"})
			return
		}
		log.Printf("daemon: joining network %q via %s", networkName, *anchorURL)
		anchor.Run(ctx, *anchorURL, networkName, id, m)
		log.Printf("daemon: left network %q", networkName)
	}

	if err := ipc.Run(m, *ipcPort, joinFn); 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
}