package corebin

import (
	"os"
	"path/filepath"
	"testing"
)

func TestResolveCacheAndStale(t *testing.T) {
	Invalidate()
	dir := t.TempDir()
	path := filepath.Join(dir, "core")
	if err := os.WriteFile(path, []byte("x"), 0o755); err != nil {
		t.Fatal(err)
	}
	key := CacheKey(dir, "naive")
	calls := 0
	fn := func() (string, error) {
		calls++
		return path, nil
	}
	if p, err := Resolve(key, fn); err != nil || p != path || calls != 1 {
		t.Fatalf("first: path=%q calls=%d err=%v", p, calls, err)
	}
	if p, err := Resolve(key, fn); err != nil || p != path || calls != 1 {
		t.Fatalf("cached: path=%q calls=%d err=%v", p, calls, err)
	}
	_ = os.Remove(path)
	if _, err := Resolve(key, fn); err != nil {
		// fn returns removed path; Resolve still succeeds but next Stat misses
		t.Fatalf("unexpected err after delete before recreate: %v", err)
	}
	if calls != 2 {
		t.Fatalf("expected refresh call, got %d", calls)
	}
	if err := os.WriteFile(path, []byte("y"), 0o755); err != nil {
		t.Fatal(err)
	}
	if p, err := Resolve(key, fn); err != nil || p != path {
		t.Fatalf("after recreate: %q %v", p, err)
	}
	if ProtoKey("vless") != "xray" || ProtoKey("naive") != "naive" {
		t.Fatal("ProtoKey")
	}
}