package cri

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

func loadFixture(t *testing.T, content string) string {
	t.Helper()
	path := filepath.Join(t.TempDir(), "config.toml")
	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
		t.Fatal(err)
	}
	return path
}

func TestLoadWithKata(t *testing.T) {
	cc, err := Load(loadFixture(t, configWithKata))
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if !cc.HasHandler("kata") {
		t.Fatalf("expected handler kata, got %v", cc.HandlerNames())
	}
}

func TestLoadWithMultipleRuntimes(t *testing.T) {
	cc, err := Load(loadFixture(t, configWithMultipleRuntimes))
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	want := []string{"kata", "kata-qemu", "kata-qemu-tdx"}
	if !reflect.DeepEqual(cc.HandlerNames(), want) {
		t.Fatalf("expected %v, got %v", want, cc.HandlerNames())
	}
}

func TestLoadWithoutRuntimes(t *testing.T) {
	cc, err := Load(loadFixture(t, configWithoutRuntimes))
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if got := cc.HandlerNames(); len(got) != 0 {
		t.Fatalf("expected no handlers, got %v", got)
	}
}

func TestLoadLegacyCRIName(t *testing.T) {
	cc, err := Load(loadFixture(t, configWithLegacyCRIName))
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if !cc.HasHandler("runsc") {
		t.Fatalf("expected handler runsc, got %v", cc.HandlerNames())
	}
}

func TestLoadEmptyRuntimes(t *testing.T) {
	cc, err := Load(loadFixture(t, configWithEmptyRuntimes))
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if got := cc.HandlerNames(); len(got) != 0 {
		t.Fatalf("expected no handlers, got %v", got)
	}
}

func TestLoadMissingFile(t *testing.T) {
	_, err := Load(filepath.Join(t.TempDir(), "does-not-exist.toml"))
	if !errors.Is(err, ErrConfigNotFound) {
		t.Fatalf("expected ErrConfigNotFound, got %v", err)
	}
}

func TestLoadMalformed(t *testing.T) {
	_, err := Load(loadFixture(t, "this is not = toml [["))
	if err == nil {
		t.Fatal("expected parse error, got nil")
	}
}