import { type Project, validateProject } from "../engine/schema.ts";
function db(): Promise<IDBDatabase> {
  return new Promise((resolve, reject) => {
    const req = indexedDB.open("forma-projects", 1);
    req.onupgradeneeded = () => req.result.createObjectStore("projects");
    req.onsuccess = () => resolve(req.result);
    req.onerror = () => reject(req.error);
  });
}
export async function loadDraft(key = "active") {
  const d = await db();
  return new Promise<Project | null>((resolve, reject) => {
    const r = d.transaction("projects").objectStore("projects").get(key);
    r.onsuccess = () => {
      d.close();
      if (r.result) {
        try {
          validateProject(r.result);
          resolve(r.result);
        } catch {
          resolve(null);
        }
      } else resolve(null);
    };
    r.onerror = () => reject(r.error);
  });
}
export async function saveDraft(p: Project, key = "active") {
  const d = await db();
  return new Promise<void>((resolve, reject) => {
    const tx = d.transaction("projects", "readwrite");
    tx.objectStore("projects").put(p, key);
    tx.oncomplete = () => {
      d.close();
      resolve();
    };
    tx.onerror = () => reject(tx.error);
  });
}