package copier

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

	"jukebox_maker/internal/config"
)

func TestBuildFileListFiltersAllowedExtensions(t *testing.T) {
	root := t.TempDir()
	source := filepath.Join(root, "music")
	if err := os.MkdirAll(filepath.Join(source, "nested"), 0o755); err != nil {
		t.Fatalf("MkdirAll() error = %v", err)
	}

	files := map[string]string{
		filepath.Join(source, "track.mp3"):          "audio",
		filepath.Join(source, "clip.mp4"):           "video",
		filepath.Join(source, "cover.jpg"):          "photo",
		filepath.Join(source, "nested", "note.txt"): "text",
	}
	for path, body := range files {
		if err := os.WriteFile(path, []byte(body), 0o644); err != nil {
			t.Fatalf("WriteFile(%q) error = %v", path, err)
		}
	}

	items, err := buildFileList("", []config.SourceFolder{
		{Path: source, Enabled: true, Root: true},
	}, nil, config.DefaultAllowedExtensions())
	if err != nil {
		t.Fatalf("buildFileList() error = %v", err)
	}

	if len(items) != 2 {
		t.Fatalf("buildFileList() len = %d, want 2", len(items))
	}

	got := make(map[string]struct{}, len(items))
	for _, item := range items {
		got[filepath.Base(item.relPath)] = struct{}{}
	}
	if _, ok := got["track.mp3"]; !ok {
		t.Fatalf("missing mp3 file: %v", got)
	}
	if _, ok := got["clip.mp4"]; !ok {
		t.Fatalf("missing mp4 file: %v", got)
	}
	if _, ok := got["cover.jpg"]; ok {
		t.Fatalf("unexpected jpg file: %v", got)
	}
}