package configkit

import (
	"errors"
	"strings"
	"testing"

	"gitea.maximumdirect.net/eric/ConfigKit/internal/engine"
)

func TestWrappedSourcesPreserveEngineOwnership(t *testing.T) {
	t.Parallel()

	type config struct {
		Value string `yaml:"value"`
	}
	data := []byte("value: retained\n")
	source := Bytes("snapshot.yml", data)
	data[7] = 'X'
	result, err := engine.Load[config](source.toEngine(), engine.SecretBinding{})
	if err != nil || result.Config.Value != "retained" {
		t.Fatalf("snapshotted source = %#v, %v", result, err)
	}

	readerSource := Reader("reader.yml", strings.NewReader("value: once\n"))
	first := readerSource
	if _, err := engine.Load[config](first.toEngine(), engine.SecretBinding{}); err != nil {
		t.Fatal(err)
	}
	_, err = engine.Load[config](readerSource.toEngine(), engine.SecretBinding{})
	var loadError *engine.LoadError
	if !errors.As(err, &loadError) || len(loadError.Diagnostics()) != 1 || loadError.Diagnostics()[0].Code != engine.CodeSourceReaderUsed {
		t.Fatalf("copied reader source error = %#v", err)
	}
}