"use client";

import { useEffect, useMemo, useState } from "react";
import type { Destination } from "@/lib/types";
import ToolCityExits from "@/components/ToolCityExits";
import { meetupCityHref } from "@/lib/meetupLinks";
import Link from "next/link";

interface Task {
  id: string;
  emoji: string;
  label: string;
  day: number;
}

const TASKS: Task[] = [
  { id: "sim", emoji: "📱", label: "办本地 SIM / 激活 eSIM", day: 1 },
  { id: "cash", emoji: "💵", label: "换少量现金 + 测试银行卡", day: 1 },
  { id: "wifi", emoji: "📶", label: "测网速，确认可视频会议", day: 1 },
  { id: "grocery", emoji: "🛒", label: "采购日用品与饮水", day: 1 },
  { id: "maps", emoji: "🗺️", label: "标记医院 / 警局 / 超市", day: 2 },
  { id: "cowork", emoji: "💻", label: "探访 1–2 个联合办公", day: 2 },
  { id: "cafe", emoji: "☕", label: "找到常去的工作咖啡馆", day: 3 },
  { id: "meetup", emoji: "🤝", label: "加本地游民群 / 报名 Meetup", day: 3 },
  { id: "housing", emoji: "🏡", label: "确认长租或续住决策", day: 5 },
  { id: "routine", emoji: "🕐", label: "固定作息与深度工作时段", day: 7 },
  { id: "backup", emoji: "🔐", label: "备份证件照片到云盘", day: 2 },
  { id: "insurance", emoji: "🏥", label: "确认保险客服与紧急电话", day: 1 },
];

const STORAGE_PREFIX = "nomadro-arrival-";

interface Props {
  destinations: Destination[];
}

export default function ArrivalChecklist({ destinations }: Props) {
  const [slug, setSlug] = useState(destinations[0]?.slug || "bali");
  const [checked, setChecked] = useState<Record<string, boolean>>({});
  const [ready, setReady] = useState(false);
  const dest = destinations.find((d) => d.slug === slug);

  useEffect(() => {
    try {
      const raw = localStorage.getItem(STORAGE_PREFIX + slug);
      setChecked(raw ? JSON.parse(raw) : {});
    } catch {
      setChecked({});
    }
    setReady(true);
  }, [slug]);

  useEffect(() => {
    if (!ready) return;
    localStorage.setItem(STORAGE_PREFIX + slug, JSON.stringify(checked));
  }, [checked, slug, ready]);

  const done = Object.values(checked).filter(Boolean).length;
  const pct = Math.round((done / TASKS.length) * 100);

  const byDay = useMemo(() => {
    const map: Record<number, Task[]> = {};
    TASKS.forEach((t) => {
      if (!map[t.day]) map[t.day] = [];
      map[t.day].push(t);
    });
    return Object.entries(map).sort((a, b) => Number(a[0]) - Number(b[0]));
  }, []);

  const toggle = (id: string) => setChecked((p) => ({ ...p, [id]: !p[id] }));

  return (
    <section className="section arrival-section" id="arrival">
      <div className="container">
        <div className="section-header reveal">
          <span className="section-tag">🛬 ARRIVAL</span>
          <h2>落地第一周清单</h2>
          <p>从落地到进入工作节奏，按天勾选不慌乱</p>
        </div>

        <div className="housing-cities reveal">
          {destinations.map((d) => (
            <button
              key={d.slug}
              className={`season-city-btn${slug === d.slug ? " active" : ""}`}
              onClick={() => setSlug(d.slug)}
            >
              {d.emoji} {d.name}
            </button>
          ))}
        </div>

        <div className="arrival-card reveal">
          <div className="arrival-progress">
            <div>
              <h3>{dest?.emoji} {dest?.name} · 到站进度</h3>
              <p>{done}/{TASKS.length} 完成 · {pct}%</p>
            </div>
            <div className="packing-bar" style={{ maxWidth: 240, flex: 1 }}>
              <div className="packing-bar-fill" style={{ width: `${pct}%` }} />
            </div>
          </div>

          <div className="arrival-days">
            {byDay.map(([day, tasks]) => (
              <div key={day} className="arrival-day">
                <h4>Day {day}</h4>
                <ul>
                  {tasks.map((t) => (
                    <li key={t.id}>
                      <label className={`packing-item${checked[t.id] ? " checked" : ""}`}>
                        <input type="checkbox" checked={!!checked[t.id]} onChange={() => toggle(t.id)} />
                        <span className="packing-check">{checked[t.id] ? "✓" : ""}</span>
                        <span className="packing-emoji">{t.emoji}</span>
                        <span className="packing-label">{t.label}</span>
                        {t.id === "meetup" && dest && (
                          <Link href={meetupCityHref(dest.name)} className="arrival-meetup-link">
                            →
                          </Link>
                        )}
                      </label>
                    </li>
                  ))}
                </ul>
              </div>
            ))}
          </div>
          {dest && <ToolCityExits dest={dest} />}
        </div>
      </div>
    </section>
  );
}