import type { CultureDecode } from '../types/culture';
import { getScanInsight } from './localLens';

const JOURNAL_KEY = 'local-in-30s-journal';

export type JournalRecord = CultureDecode & {
  savedAt: string;
  localMove: string;
};

export function loadJournalRecords(): JournalRecord[] {
  if (typeof window === 'undefined') return [];

  try {
    const raw = window.localStorage.getItem(JOURNAL_KEY);
    if (!raw) return [];

    const parsed = JSON.parse(raw);
    return Array.isArray(parsed)
      ? parsed.map((record) => ({
          ...record,
          localMove: record.localMove || getScanInsight(record).localMove,
        }))
      : [];
  } catch {
    return [];
  }
}

export function saveJournalRecord(decode: CultureDecode): JournalRecord[] {
  if (typeof window === 'undefined') return [];

  const current = loadJournalRecords();
  const insight = getScanInsight(decode);
  const nextRecord: JournalRecord = {
    ...decode,
    savedAt: new Date().toISOString(),
    localMove: insight.localMove,
  };

  const next = [nextRecord, ...current.filter((record) => record.id !== decode.id)].slice(0, 12);
  window.localStorage.setItem(JOURNAL_KEY, JSON.stringify(next));
  return next;
}