export type PendingTextIntent = {
  text: string;
  dialogKey: string;
  messageKey: string;
};

const STORAGE_KEY = "han.pending-message";

export function createPendingTextIntent(text: string): PendingTextIntent {
  return {
    text,
    dialogKey: crypto.randomUUID(),
    messageKey: crypto.randomUUID(),
  };
}

export function savePendingTextIntent(intent: PendingTextIntent) {
  if (typeof window !== "undefined") {
    window.sessionStorage.setItem(STORAGE_KEY, JSON.stringify(intent));
  }
}

export function loadPendingTextIntent(): PendingTextIntent | null {
  if (typeof window === "undefined") return null;
  const raw = window.sessionStorage.getItem(STORAGE_KEY);
  if (!raw) return null;
  try {
    const value = JSON.parse(raw) as Partial<PendingTextIntent>;
    if (
      typeof value.text !== "string"
      || typeof value.dialogKey !== "string"
      || typeof value.messageKey !== "string"
    ) {
      return null;
    }
    return {
      text: value.text,
      dialogKey: value.dialogKey,
      messageKey: value.messageKey,
    };
  } catch {
    return null;
  }
}

export function clearPendingTextIntent() {
  if (typeof window !== "undefined") {
    window.sessionStorage.removeItem(STORAGE_KEY);
  }
}