package config

import "testing"

func TestDefaultsAllowedFiles(t *testing.T) {
	cfg := defaults()

	if cfg.AllowedFilesMode != AllowedFilesByMediaType {
		t.Fatalf("allowed files mode = %q, want %q", cfg.AllowedFilesMode, AllowedFilesByMediaType)
	}

	wantTypes := []string{MediaTypeAudio, MediaTypeVideo}
	if len(cfg.EnabledMediaTypes) != len(wantTypes) {
		t.Fatalf("enabled media types len = %d, want %d", len(cfg.EnabledMediaTypes), len(wantTypes))
	}
	for i, want := range wantTypes {
		if cfg.EnabledMediaTypes[i] != want {
			t.Fatalf("enabled media types[%d] = %q, want %q", i, cfg.EnabledMediaTypes[i], want)
		}
	}

	exts := cfg.EffectiveAllowedExtensions()
	if containsString(exts, ".jpg") {
		t.Fatalf("default extensions unexpectedly include photo files: %v", exts)
	}
	if !containsString(exts, ".mp3") || !containsString(exts, ".mp4") {
		t.Fatalf("default extensions = %v, want audio/video entries", exts)
	}
}

func TestValidateAllowedFilesModeExtensions(t *testing.T) {
	cfg := defaults()
	cfg.AllowedFilesMode = AllowedFilesByExtensions
	cfg.AllowedExtensions = []string{" mp3 ", ".MP4", "*.jpg", ".mp3"}

	if err := cfg.Validate(); err != nil {
		t.Fatalf("Validate() error = %v", err)
	}

	want := []string{".mp3", ".mp4", ".jpg"}
	if len(cfg.AllowedExtensions) != len(want) {
		t.Fatalf("allowed extensions len = %d, want %d", len(cfg.AllowedExtensions), len(want))
	}
	for i, item := range want {
		if cfg.AllowedExtensions[i] != item {
			t.Fatalf("allowed extensions[%d] = %q, want %q", i, cfg.AllowedExtensions[i], item)
		}
	}
}

func TestValidateRejectsEmptyAllowedFiles(t *testing.T) {
	cfg := defaults()
	cfg.AllowedFilesMode = AllowedFilesByExtensions
	cfg.AllowedExtensions = nil

	if err := cfg.Validate(); err == nil {
		t.Fatal("Validate() error = nil, want non-nil")
	}
}

func containsString(items []string, want string) bool {
	for _, item := range items {
		if item == want {
			return true
		}
	}
	return false
}