/** Текущий формат архива проекта (новые сохранения). */
export const PROJECT_ZIP_EXTENSION = '.ttrpg.zip';

/** Устаревший формат — только открытие / импорт (вариант B). */
export const PROJECT_ZIP_EXTENSION_LEGACY = '.dnd.zip';

export function isProjectZipFileName(fileName: string): boolean {
  const lower = fileName.toLowerCase();
  return lower.endsWith(PROJECT_ZIP_EXTENSION) || lower.endsWith(PROJECT_ZIP_EXTENSION_LEGACY);
}

export function isLegacyProjectZipFileName(fileName: string): boolean {
  return fileName.toLowerCase().endsWith(PROJECT_ZIP_EXTENSION_LEGACY);
}

export function projectZipFileNameFromBase(stem: string): string {
  return `${stem}${PROJECT_ZIP_EXTENSION}`;
}

/** Имя файла для сохранения/экспорта — всегда `.ttrpg.zip`. */
export function normalizeSaveProjectZipPath(filePath: string): string {
  const lower = filePath.toLowerCase();
  if (lower.endsWith(PROJECT_ZIP_EXTENSION)) return filePath;
  if (lower.endsWith(PROJECT_ZIP_EXTENSION_LEGACY)) {
    return filePath.slice(0, -PROJECT_ZIP_EXTENSION_LEGACY.length) + PROJECT_ZIP_EXTENSION;
  }
  if (lower.endsWith('.zip')) {
    return filePath.replace(/\.zip$/iu, PROJECT_ZIP_EXTENSION);
  }
  return `${filePath}${PROJECT_ZIP_EXTENSION}`;
}

export function stripProjectZipExtension(fileName: string): string {
  const lower = fileName.toLowerCase();
  if (lower.endsWith(PROJECT_ZIP_EXTENSION)) {
    return fileName.slice(0, -PROJECT_ZIP_EXTENSION.length);
  }
  if (lower.endsWith(PROJECT_ZIP_EXTENSION_LEGACY)) {
    return fileName.slice(0, -PROJECT_ZIP_EXTENSION_LEGACY.length);
  }
  return fileName;
}

export const PROJECT_ZIP_OPEN_DIALOG_FILTER: Electron.FileFilter = {
  name: 'Проект TTRPG (*.ttrpg.zip, *.dnd.zip)',
  extensions: ['ttrpg.zip', 'dnd.zip'],
};

export const PROJECT_ZIP_SAVE_DIALOG_FILTER: Electron.FileFilter = {
  name: 'Проект TTRPG (*.ttrpg.zip)',
  extensions: ['ttrpg.zip'],
};