// Everything one account holds on the server, in the same file format the app's own "Download backup"
// makes, so it can be restored from Settings on any device.
export const BACKUP_APP = 'bible-study-project';
export const BACKUP_VERSION = 1;

// `store` supplies the account's data: { projects(), prefs(), marks(), ink(), plans() }.
export function buildAccountExport(user, store, now = new Date()) {
  const prefs = store.prefs() ?? {};
  const marks = store.marks() ?? {};
  const plans = store.plans() ?? {};
  return {
    app: BACKUP_APP,
    version: BACKUP_VERSION,
    exportedAt: now.toISOString(),
    account: user.email,
    source: 'server',
    projects: store.projects(),
    reader: {
      bookmarks: marks.bookmarks ?? {},
      highlights: marks.highlights ?? [],
      colorLabels: prefs.colorLabels?.v ?? {},
      ink: store.ink() ?? {},
    },
    readingHistory: store.history?.() ?? { chapters: {}, days: [] },
    readingPlans: {
      progress: plans.progress ?? [],
      customPlans: plans.customPlans ?? [],
      activity: plans.activity ?? [],
    },
  };
}

export const accountExportName = (now = new Date()) => `bible-study-account-${now.toISOString().slice(0, 10)}.json`;