const templates = {
  'my-template': {
    converter: (context?: number[]) => {
      return context?.join(', ') || '';
    },
  },
} as const;

type Template = typeof templates;
type TemplateName = keyof Template;
type TemplateContext = {
  [key in TemplateName]: Parameters<Template[TemplateName]['converter']>[0];
};

export function convertTemplate(
  text: string,
  context?: TemplateContext,
  templateUse?: TemplateName[],
) {
  let ret = text;

  for (const [name, template] of Object.entries(templates)) {
    if (templateUse && !templateUse.includes(name as TemplateName)) continue;

    ret = text.replace(
      new RegExp('\\#\\[' + name.replaceAll('-', '\\-') + '\\]', 'g'),
      typeof template.converter === 'function'
        ? template.converter(context?.[name as TemplateName])
        : template.converter,
    );
  }

  return ret;
}