import { useEffect, useMemo, useState } from 'react';
import { useNavigate, useParams } from 'react-router-dom';
import AppImage from '@dukang/shared-ui/AppImage';
import ProductCarousel from '../components/ProductCarousel';
import AppToast from '../components/AppToast';
import { request } from '../lib/api';
import { track } from '../lib/analytics';
import { handleShareButtonClick } from '../lib/wechat-share';
import { STITCH_STORE_MAP, getStoreGalleryImages } from '../lib/store-images';

type StoreMedia = { url: string; mediaType?: string; sortOrder?: number };

type StoreDetail = {
  id: string;
  name: string;
  phone: string;
  province: string;
  cityName?: string;
  city?: string;
  district: string;
  address: string;
  intro?: string | null;
  coverUrl?: string | null;
  status: string;
  openTime?: string | null;
  closeTime?: string | null;
  openTime2?: string | null;
  closeTime2?: string | null;
  avgPrice?: number | null;
  category?: { name: string } | null;
  media?: StoreMedia[];
};

const SERVICES = [
  { icon: 'wifi', label: 'WiFi' },
  { icon: 'local_parking', label: '免费停车' },
  { icon: 'meeting_room', label: '独立包间' },
  { icon: 'table_restaurant', label: '宴会大厅' },
] as const;

const MOCK_DISTANCES = ['800m', '1.2km', '2.4km', '3.5km'];

const DEFAULT_INTRO =
  '作为本地优质餐饮合作伙伴，门店融合地域饮食文化与高端社交场景，设有杜康文化体验区，让宾客在用餐之余领略中华酒祖的千年传承。主打精品地方菜与创意融合菜，氛围庄重而不失亲和力，是商务宴请、亲友小聚以及文化交流的理想场所。';

function formatHours(store: StoreDetail) {
  const parts: string[] = [];
  if (store.openTime && store.closeTime) parts.push(`${store.openTime}-${store.closeTime}`);
  if (store.openTime2 && store.closeTime2) parts.push(`${store.openTime2}-${store.closeTime2}`);
  return parts.length ? parts.join('，') : '09:30-22:00';
}

function fullAddress(store: StoreDetail) {
  const city = store.cityName || store.city || '';
  return `${store.province}${city}${store.district}${store.address}`;
}

export default function StoreDetailPage() {
  const { id } = useParams();
  const navigate = useNavigate();
  const [store, setStore] = useState<StoreDetail | null>(null);
  const [benefitBalance, setBenefitBalance] = useState(0);
  const [headerSolid, setHeaderSolid] = useState(false);
  const [toast, setToast] = useState('');

  useEffect(() => {
    if (id) {
      request<StoreDetail>('USER_H5', `/stores/${id}`).then(setStore);
      track('store_detail_view', { refType: 'STORE', refId: id, storeId: id });
    }
  }, [id]);

  useEffect(() => {
    request<Array<{ balance: number; status: string }>>('USER_H5', '/benefit/coupons')
      .then((list) => {
        const balance = list.reduce((sum, c) => {
          if (c.status === 'ACTIVE') return sum + Number(c.balance || 0);
          return sum;
        }, 0);
        setBenefitBalance(balance);
      })
      .catch(() => {});
  }, []);

  useEffect(() => {
    function onScroll() {
      setHeaderSolid(window.scrollY > 80);
    }
    window.addEventListener('scroll', onScroll, { passive: true });
    return () => window.removeEventListener('scroll', onScroll);
  }, []);

  const galleryImages = useMemo(() => {
    if (!store) return [];
    return getStoreGalleryImages(store.coverUrl, store.media);
  }, [store]);

  const distance = MOCK_DISTANCES[Number(id || 0) % MOCK_DISTANCES.length];
  const isOpen = store?.status === 'OPEN';

  if (!store) {
    return <div className="empty store-detail-page">加载中...</div>;
  }

  function callStore() {
    if (store?.phone) window.location.href = `tel:${store.phone}`;
  }

  function openMap() {
    window.alert('preV1：导航功能即将开放');
  }

  return (
    <div className="store-detail-page">
      <header className={`store-detail-header${headerSolid ? ' solid' : ''}`}>
        <button
          type="button"
          className="store-detail-header-btn"
          aria-label="返回"
          onClick={() => navigate('/stores')}
        >
          <span className="material-symbols-outlined">arrow_back</span>
        </button>
        <h1 className={`app-page-title store-detail-header-title${headerSolid ? ' visible' : ''}`}>门店详情</h1>
        <button type="button" className="store-detail-header-btn" aria-label="分享" onClick={() => handleShareButtonClick(setToast)}>
          <span className="material-symbols-outlined">share</span>
        </button>
      </header>

      <AppToast message={toast} />

      <main className="store-detail-main">
        <section className="store-detail-hero">
          <ProductCarousel images={galleryImages} alt={store.name} variant="store" />
        </section>

        <section className="store-detail-info-wrap">
          <div className="store-detail-info-card">
            <div className="store-detail-info-head">
              <div>
                <h2 className="store-detail-name">{store.name}</h2>
                <p className="store-detail-hours">营业时间：{formatHours(store)}</p>
                {store.avgPrice != null && Number(store.avgPrice) > 0 ? (
                  <p className="store-detail-hours">人均约 ¥{Number(store.avgPrice).toFixed(0)}</p>
                ) : null}
                {store.category?.name && (
                  <span className="store-detail-category">{store.category.name}</span>
                )}
              </div>
              <div className={`store-detail-status${isOpen ? '' : ' closed'}`}>
                {isOpen && <span className="store-detail-status-dot" />}
                <span>{isOpen ? '营业中' : '休息中'}</span>
              </div>
            </div>
          </div>
        </section>

        <section className="store-detail-tip">
          <span className="material-symbols-outlined">info</span>
          <p>温馨提示：为保证服务品质，如用餐规模超过2桌，请提前电话联系门店确认可用性。</p>
        </section>

        <section className="store-detail-location">
          <div className="store-detail-location-card">
            <div className="store-detail-map">
              <AppImage src={STITCH_STORE_MAP} alt="" wrapperClassName="app-image--fill" />
              <div className="store-detail-map-gradient" aria-hidden />
            </div>
            <div className="store-detail-location-body">
              <div className="store-detail-location-text">
                <p>{fullAddress(store)}</p>
                <p className="store-detail-distance">
                  <span className="material-symbols-outlined">near_me</span>
                  距离您 {distance}
                </p>
              </div>
              <div className="store-detail-location-actions">
                <button type="button" className="store-detail-action-btn" aria-label="电话" onClick={callStore}>
                  <span className="material-symbols-outlined">call</span>
                </button>
                <button
                  type="button"
                  className="store-detail-action-btn store-detail-action-btn--primary"
                  aria-label="导航"
                  onClick={openMap}
                >
                  <span className="material-symbols-outlined">directions</span>
                </button>
              </div>
            </div>
          </div>
        </section>

        <section className="store-detail-services">
          <h3>设施服务</h3>
          <div className="store-detail-service-grid">
            {SERVICES.map((s) => (
              <div key={s.label} className="store-detail-service-item">
                <span className="material-symbols-outlined">{s.icon}</span>
                <span>{s.label}</span>
              </div>
            ))}
          </div>
        </section>

        <section className="store-detail-intro">
          <h3>门店介绍</h3>
          <div className="store-detail-intro-card">
            <p>{store.intro || DEFAULT_INTRO}</p>
            <div className="store-detail-intro-foot">
              <div className="store-detail-intro-avatars" aria-hidden>
                <span />
                <span />
                <span />
              </div>
              <span className="store-detail-intro-stat">已有 1.2w 人到店体验</span>
            </div>
          </div>
        </section>
      </main>

      <footer className="store-detail-footer">
        <div className="store-detail-footer-inner">
          <div className="store-detail-balance">
            <span className="store-detail-balance-label">可用额度</span>
            <span className="store-detail-balance-value">
              ¥{benefitBalance.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
            </span>
          </div>
          <button type="button" className="store-detail-redeem-btn" onClick={() => navigate('/redeem')}>
            <span className="material-symbols-outlined">qr_code_scanner</span>
            去核销
          </button>
        </div>
      </footer>
    </div>
  );
}