package corebin

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

func TestResolveTrustsCacheWithoutStat(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: %q %v calls=%d", p, err, calls)
	}
	_ = os.Remove(path) // missing on disk — cache still trusted until Invalidate
	if p, err := Resolve(key, fn); err != nil || p != path || calls != 1 {
		t.Fatalf("cached without Stat: %q %v calls=%d", p, err, calls)
	}
	Invalidate()
	if _, err := Resolve(key, fn); err == nil && calls != 2 {
		// fn returns deleted path; Resolve still succeeds
	}
	if calls != 2 {
		t.Fatalf("after Invalidate expected refresh, calls=%d", calls)
	}
}

func TestVirtualEmbeddedAWG(t *testing.T) {
	Invalidate()
	key := CacheKey("/bin", "awg")
	calls := 0
	p, err := Resolve(key, func() (string, error) {
		calls++
		return "embedded-amneziawg-go", nil
	})
	if err != nil || p != "embedded-amneziawg-go" || calls != 1 {
		t.Fatalf("%q %v calls=%d", p, err, calls)
	}
	if !VirtualPath(p) {
		t.Fatal("expected virtual")
	}
	p2, err := Resolve(key, func() (string, error) {
		calls++
		return "embedded-amneziawg-go", nil
	})
	if err != nil || p2 != p || calls != 1 {
		t.Fatalf("second: %q calls=%d", p2, calls)
	}
}