package registry

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

func noExecutable() (string, error) { return "", os.ErrNotExist }

func TestFindCranePrefersWerkdockCrane(t *testing.T) {
	dir := t.TempDir()
	configured := filepath.Join(dir, "my-crane")
	if err := os.WriteFile(configured, []byte("#!/bin/sh\n"), 0o755); err != nil {
		t.Fatal(err)
	}
	t.Setenv("PATH", "")
	got, err := FindCrane(configured, noExecutable)
	if err != nil || got != configured {
		t.Fatalf("got %q, %v", got, err)
	}
	if _, err := FindCrane(filepath.Join(dir, "missing"), noExecutable); err == nil || !strings.Contains(err.Error(), "WERKDOCK_CRANE") {
		t.Errorf("missing configured binary: got %v", err)
	}
}

func TestFindCraneBesideWerkdock(t *testing.T) {
	dir := t.TempDir()
	beside := filepath.Join(dir, "crane")
	if err := os.WriteFile(beside, []byte("#!/bin/sh\n"), 0o755); err != nil {
		t.Fatal(err)
	}
	t.Setenv("PATH", "")
	got, err := FindCrane("", func() (string, error) { return filepath.Join(dir, "werkdock"), nil })
	if err != nil || got != beside {
		t.Fatalf("got %q, %v", got, err)
	}
	if _, err := FindCrane("", noExecutable); err == nil || !strings.Contains(err.Error(), "crane binary") {
		t.Errorf("no crane anywhere: got %v", err)
	}
}