import { atom } from 'jotai';

const LAST_SEEN_VERSION_KEY = 'paarrot:lastSeenVersion';
const PENDING_RELEASE_NOTES_KEY = 'paarrot:pendingReleaseNotes';

export type PendingReleaseNotes = {
  version: string;
  releaseNotes: unknown;
};

export type ReleaseNotesDialogState = {
  open: boolean;
  /** Opened from About instead of an automatic post-update prompt. */
  manual: boolean;
};

export const releaseNotesDialogAtom = atom<ReleaseNotesDialogState>({
  open: false,
  manual: false,
});

export function getLastSeenAppVersion(): string | null {
  return localStorage.getItem(LAST_SEEN_VERSION_KEY);
}

export function setLastSeenAppVersion(version: string): void {
  localStorage.setItem(LAST_SEEN_VERSION_KEY, version);
}

export function storePendingReleaseNotes(version: string, releaseNotes: unknown): void {
  try {
    localStorage.setItem(
      PENDING_RELEASE_NOTES_KEY,
      JSON.stringify({ version, releaseNotes } satisfies PendingReleaseNotes)
    );
  } catch {
    // ignore quota errors
  }
}

export function getPendingReleaseNotes(): PendingReleaseNotes | null {
  try {
    const raw = localStorage.getItem(PENDING_RELEASE_NOTES_KEY);
    if (!raw) return null;
    const parsed = JSON.parse(raw) as PendingReleaseNotes;
    if (typeof parsed?.version !== 'string') return null;
    return parsed;
  } catch {
    return null;
  }
}

export function clearPendingReleaseNotes(): void {
  localStorage.removeItem(PENDING_RELEASE_NOTES_KEY);
}