import { get, put } from "./api";

export interface Template {
  id: string;
  name: string;
  text: string;
}

export interface TemplateLists {
  personal: Template[];
  global: Template[];
  can_edit_global: boolean;
}

export const loadTemplates = () => get<TemplateLists>("/templates");
export const saveTemplates = (scope: "personal" | "global", list: Template[]) => put<Template[]>(`/templates/${scope}`, list);

/** Placeholders like {{file}} or {{goal: what should change}} (name, optional hint). */
export function placeholders(text: string): { name: string; hint: string }[] {
  const seen = new Map<string, string>();
  for (const m of text.matchAll(/\{\{\s*([^}:]+?)\s*(?::\s*([^}]*?))?\s*\}\}/g)) {
    if (!seen.has(m[1])) seen.set(m[1], m[2] ?? "");
  }
  return [...seen].map(([name, hint]) => ({ name, hint }));
}

export function fill(text: string, values: Record<string, string>): string {
  return text.replace(/\{\{\s*([^}:]+?)\s*(?::\s*([^}]*?))?\s*\}\}/g, (_, name: string) => values[name] ?? "");
}