package cli

import (
	"errors"
	"fmt"
	"io"
	"os"

	configkit "gitea.maximumdirect.net/eric/ConfigKit"
	"gitea.maximumdirect.net/eric/notarius/internal/core/config"
)

func loadConfigKit(configPath, overlay string, overrides []configkit.Override, opts Options) (*config.LoadedConfig, string, error) {
	path, err := discoverConfigPath(configPath, opts)
	if err != nil {
		return nil, "", err
	}
	workingDirectory, err := os.Getwd()
	if err != nil {
		return nil, "", fmt.Errorf("determine invocation directory: %w", err)
	}
	loaded, err := config.Load(path, config.LoadOptions{Overlay: overlay, Overrides: overrides, InvocationDirectory: workingDirectory})
	if err != nil {
		return nil, "", err
	}
	return loaded, path, nil
}

func writeConfigLoadError(output io.Writer, err error) {
	var loadError *configkit.LoadError
	if errors.As(err, &loadError) {
		if writeErr := configkit.WriteDiagnostics(output, loadError.Diagnostics()); writeErr == nil {
			// ConfigKit's locations contain source IDs. Keep its renderer and
			// supply the acquired-source legend so imported/overlay errors can
			// be traced to a file. Quoting also escapes terminal controls.
			for _, source := range loadError.Sources() {
				label := source.Path
				if label == "" {
					label = source.Label
				}
				if _, err := fmt.Fprintf(output, "source %q: %q\n", source.ID, label); err != nil {
					return
				}
			}
			return
		}
	}
	fmt.Fprintf(output, "notarius: %v\n", err)
}