// Command antidriftd is the AntiDrift focus daemon: it serves a local web UI
// and owns the commitment state machine.
package main

import (
	"context"
	"log"
	"os"
	"os/exec"
	"runtime"
	"time"

	"antidrift/internal/ai"
	"antidrift/internal/evidence"
	"antidrift/internal/session"
	"antidrift/internal/store"
	"antidrift/internal/web"
)

const addr = "localhost:7777"

func main() {
	path, err := store.DefaultPath()
	if err != nil {
		log.Fatalf("resolve snapshot path: %v", err)
	}
	ctrl, err := session.New(path)
	if err != nil {
		log.Fatalf("load session: %v", err)
	}

	srv := web.NewServer(ctrl)
	srv.Init() // re-arm or expire a restored Active session

	// Wire the AI planning coach. Backend selectable via ANTIDRIFT_AI_BACKEND
	// (claude default, or codex). Misconfiguration degrades to no coach rather
	// than failing startup — manual planning still works.
	if backend, err := ai.NewBackend(os.Getenv("ANTIDRIFT_AI_BACKEND")); err != nil {
		log.Printf("ai disabled: %v", err)
	} else {
		svc := ai.NewService(backend)
		ctrl.SetCoach(svc)
		ctrl.SetDriftJudge(svc)
		ctrl.SetNudge(svc)
		log.Printf("ai: %s backend (coach + drift judge + nudge)", backend.Name())
	}

	src := evidence.NewSource()
	go src.Watch(context.Background(), ctrl.RecordWindow)

	go openBrowser("http://" + addr)

	log.Printf("antidriftd listening on http://%s", addr)
	if err := srv.Router().Run(addr); err != nil {
		log.Fatalf("server: %v", err)
	}
}

// openBrowser best-effort launches the default browser after a short delay so
// the server is listening first. Failures are logged, not fatal.
func openBrowser(url string) {
	time.Sleep(300 * time.Millisecond)
	var cmd string
	var args []string
	switch runtime.GOOS {
	case "linux":
		cmd, args = "xdg-open", []string{url}
	case "darwin":
		cmd, args = "open", []string{url}
	case "windows":
		cmd, args = "rundll32", []string{"url.dll,FileProtocolHandler", url}
	default:
		log.Printf("open browser manually: %s", url)
		return
	}
	if err := exec.Command(cmd, args...).Start(); err != nil {
		log.Printf("could not open browser (%v); visit %s", err, url)
	}
}