"use client";

import { clearDraft, loadDraft, saveDraft } from "@/lib/localDraft";

export type NextStopPrefs = {
  budget: number;
  internet: number;
  climate: string;
  selectedTags: string[];
};

const KEY = "nomadro-next-stop-prefs";

const DEFAULTS: NextStopPrefs = {
  budget: 8000,
  internet: 50,
  climate: "mild",
  selectedTags: ["社区活跃"],
};

export function loadNextStopPrefs(): NextStopPrefs {
  const raw = loadDraft<Partial<NextStopPrefs>>(KEY);
  if (!raw) return { ...DEFAULTS };
  return {
    budget: typeof raw.budget === "number" ? raw.budget : DEFAULTS.budget,
    internet: typeof raw.internet === "number" ? raw.internet : DEFAULTS.internet,
    climate: raw.climate || DEFAULTS.climate,
    selectedTags: Array.isArray(raw.selectedTags) && raw.selectedTags.length
      ? raw.selectedTags
      : DEFAULTS.selectedTags,
  };
}

export function saveNextStopPrefs(prefs: NextStopPrefs) {
  saveDraft(KEY, prefs);
}

export function clearNextStopPrefs() {
  clearDraft(KEY);
}