package config

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

func TestOmittingNormalizeSpeakersDoesNotRequireSpeakers(t *testing.T) {
	dir := t.TempDir()
	input := writeTempFile(t, dir, "input.json")
	output := filepath.Join(dir, "merged.json")

	_, err := NewMergeConfig(MergeOptions{
		InputFiles:            []string{input},
		OutputFile:            output,
		InputReader:           DefaultInputReader,
		OutputModules:         DefaultOutputModules,
		PreprocessingModules:  "validate-raw",
		PostprocessingModules: DefaultPostprocessingModules,
	})
	if err != nil {
		t.Fatalf("expected speakers file to be optional when normalize-speakers is omitted, got %v", err)
	}
}

func TestDuplicateInputFilesFailValidation(t *testing.T) {
	dir := t.TempDir()
	input := writeTempFile(t, dir, "input.json")
	output := filepath.Join(dir, "merged.json")

	_, err := NewMergeConfig(MergeOptions{
		InputFiles:            []string{input, input},
		OutputFile:            output,
		InputReader:           DefaultInputReader,
		OutputModules:         DefaultOutputModules,
		PreprocessingModules:  DefaultPreprocessingModules,
		PostprocessingModules: DefaultPostprocessingModules,
	})
	if err == nil {
		t.Fatal("expected duplicate input error")
	}
	if !strings.Contains(err.Error(), "duplicate --input-file") {
		t.Fatalf("unexpected error: %v", err)
	}
}

func writeTempFile(t *testing.T, dir string, name string) string {
	t.Helper()

	path := filepath.Join(dir, name)
	if err := os.WriteFile(path, []byte("{}\n"), 0o600); err != nil {
		t.Fatalf("write temp file: %v", err)
	}
	return path
}