import { useEffect, useState } from 'react';
import type { PointsBalance, PackageInfo } from '../lib/api';
import { getPointsBalance, getPackages, invalidatePointsCache } from '../lib/api';

interface Props {
  locale: string;
  dashboard: { brandName: string; navHome: string; navStore: string; navDivination: string; navManual: string; navAuto: string; navHistory: string; navLanguage: string; navSettings: string; logout: string };
  store: { title: string; currentPoints: string; pointsLabel: string; rulesTitle: string; rule1: string; rule2: string; rule3: string; popularLabel: string; popularText: string; stepsTitle: string; step1: string; step2: string; step3: string; sideTitle: string; sideDesc: string };
  pricing: { p1Name: string; p1Badge: string; p1Price: string; p1Credits: string; p1Desc: string; p2Name: string; p2Price: string; p2Credits: string; p2Desc: string; p3Name: string; p3Badge: string; p3Price: string; p3Credits: string; p3Desc: string; p4Name: string; p4Price: string; p4Credits: string; p4Desc: string; buyNow: string };
}

interface PackageDisplay {
  name: string;
  badge: string;
  price: string;
  credits: string;
  desc: string;
  featured: boolean;
  productCode: string;
  appStoreProductId: string;
  starterEligible: boolean;
  isStarter: boolean;
}

// Map product codes to display names from pricing translations
const PRODUCT_CODE_MAP: Record<string, string> = {
  'new_user_pack': 'p1',   // 新人专享包 60积分
  'starter_pack': 'p2',    // 入门补充包 100积分
  'popular_pack': 'p3',    // 常用加量包 210积分
  'premium_pack': 'p4',    // 高频进阶包 415积分
};

function SidePanel({ s }: { s: Props['store'] }) {
  return (
    <div className="w-full xl:w-[320px] bg-white rounded-2xl p-5 border border-slate-200 flex flex-col gap-4 shrink-0 overflow-y-auto">
      <div className="w-12 h-12 rounded-xl bg-violet-50 flex items-center justify-center">
        <span className="material-symbols-rounded text-violet-600 text-2xl">shopping_cart</span>
      </div>
      <p className="text-slate-900 text-lg font-bold">{s.sideTitle}</p>
      <p className="text-slate-500 text-sm">{s.sideDesc}</p>
      <div className="h-px bg-slate-100" />
      <p className="text-slate-400 text-xs font-semibold">{s.popularLabel}</p>
      <div className="bg-amber-50 rounded-xl p-3.5 text-amber-700 text-sm">{s.popularText}</div>
      <p className="text-slate-400 text-xs font-semibold mt-2">{s.stepsTitle}</p>
      <div className="flex items-center gap-2.5 text-sm text-slate-600"><span className="w-5 h-5 rounded-full bg-violet-100 text-violet-600 text-xs font-bold flex items-center justify-center">1</span>{s.step1}</div>
      <div className="flex items-center gap-2.5 text-sm text-slate-600"><span className="w-5 h-5 rounded-full bg-violet-100 text-violet-600 text-xs font-bold flex items-center justify-center">2</span>{s.step2}</div>
      <div className="flex items-center gap-2.5 text-sm text-slate-600"><span className="w-5 h-5 rounded-full bg-violet-100 text-violet-600 text-xs font-bold flex items-center justify-center">3</span>{s.step3}</div>
    </div>
  );
}

export default function StorePage({ store: s, pricing: p }: Props) {
  const [points, setPoints] = useState<PointsBalance | null>(null);
  const [packages, setPackages] = useState<PackageDisplay[]>([]);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    setLoading(true);
    Promise.all([
      getPointsBalance(),
      getPackages(),
    ])
      .then(([pointsData, packagesData]) => {
        setPoints(pointsData);
        // Map backend packages to display format
        const displayPkgs: PackageDisplay[] = packagesData.packages.map((pkg) => {
          const key = PRODUCT_CODE_MAP[pkg.productCode] || 'p1';
          return {
            name: p[`${key}Name` as keyof typeof p] || pkg.productCode,
            badge: pkg.isStarter ? (pkg.starterEligible ? p.p1Badge : '') : '',
            price: p[`${key}Price` as keyof typeof p] || '',
            credits: `${pkg.credits} ${s.pointsLabel}`,
            desc: p[`${key}Desc` as keyof typeof p] || '',
            featured: pkg.productCode === 'popular_pack', // 只有常用加量包是推荐
            productCode: pkg.productCode,
            appStoreProductId: pkg.appStoreProductId,
            starterEligible: pkg.starterEligible,
            isStarter: pkg.isStarter,
          };
        });
        // Sort by sortOrder
        displayPkgs.sort((a, b) => {
          const pkgA = packagesData.packages.find(pkg => pkg.productCode === a.productCode);
          const pkgB = packagesData.packages.find(pkg => pkg.productCode === b.productCode);
          return (pkgA?.sortOrder || 0) - (pkgB?.sortOrder || 0);
        });
        setPackages(displayPkgs);
      })
      .catch(() => {
        // Fallback to static data if API fails
        setPoints({ balance: 0, frozenBalance: 0, availableBalance: 0, runCost: 20, canRun: false });
        setPackages([]);
      })
      .finally(() => setLoading(false));
  }, [p, s.pointsLabel]);

  return (
    <div className="flex flex-col gap-5 min-h-full">
        <h1 className="text-slate-900 text-xl font-bold">{s.title}</h1>

        {/* Top: Points hero + rules */}
        <div className="flex flex-col lg:flex-row gap-5">
          <div className="flex-1 rounded-2xl p-7 flex items-center gap-6" style={{ background: 'linear-gradient(135deg, #673AB7, #9C27B0)' }}>
            <div className="w-[68px] h-[68px] rounded-full flex items-center justify-center" style={{ background: 'rgba(255,255,255,0.14)' }}>
              <span className="material-symbols-rounded text-white text-3xl">account_balance_wallet</span>
            </div>
            <div>
              <p className="text-violet-200 text-sm">{s.currentPoints}</p>
              <p className="text-white text-3xl font-bold">
                {loading ? '...' : points?.balance ?? 0}
                <span className="text-base font-normal text-violet-200"> {s.pointsLabel}</span>
              </p>
            </div>
          </div>
          <div className="w-full lg:w-[320px] bg-white rounded-2xl p-5 border border-slate-200 flex flex-col gap-3.5 shrink-0">
            <div className="flex items-center gap-2.5">
              <span className="material-symbols-rounded text-violet-600 text-lg">info</span>
              <span className="text-slate-900 text-sm font-bold">{s.rulesTitle}</span>
            </div>
            <p className="text-slate-500 text-sm">{s.rule1}</p>
            <p className="text-slate-500 text-sm">{s.rule2}</p>
            <p className="text-slate-500 text-sm">{s.rule3}</p>
          </div>
        </div>

        {/* Mobile: Side panel below rules (visible only on mobile) */}
        <div className="xl:hidden">
          <SidePanel s={s} />
        </div>

        {/* Body: Packages + side panel (desktop) */}
        <div className="flex flex-col xl:flex-row gap-5 flex-1 min-h-0">
          <div className="flex-1 flex flex-col gap-4 overflow-y-auto">
            {loading ? (
              <div className="text-slate-500 text-center py-8">{s.sideDesc}</div>
            ) : (
              <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                {packages.map((pkg) => (
                  <div key={pkg.productCode} className={`bg-white rounded-2xl p-6 flex flex-col gap-3 border ${pkg.featured ? 'border-violet-400 ring-1 ring-violet-100' : 'border-slate-200'}`}>
                    <div className="flex items-center justify-between">
                      <span className="text-slate-900 font-bold text-base">{pkg.name}</span>
                      {pkg.badge && <span className={`text-xs px-2.5 py-0.5 rounded-full ${pkg.featured ? 'bg-violet-600 text-white' : 'bg-amber-100 text-amber-700'}`}>{pkg.badge}</span>}
                    </div>
                    <p className="text-slate-900 text-2xl font-extrabold">{pkg.price}</p>
                    <p className="text-violet-600 text-sm font-medium">{pkg.credits}</p>
                    <p className="text-slate-500 text-sm">{pkg.desc}</p>
                    <button
                      className={`w-full py-2.5 rounded-lg font-semibold text-sm mt-auto ${pkg.featured ? 'bg-violet-600 text-white hover:bg-violet-700' : 'bg-white text-violet-600 border border-violet-200 hover:bg-violet-50'} transition-colors`}
                      disabled={pkg.isStarter && !pkg.starterEligible}
                    >
                      {pkg.isStarter && !pkg.starterEligible ? (s.rulesTitle.includes('已购') ? '已购买' : 'Purchased') : p.buyNow}
                    </button>
                  </div>
                ))}
              </div>
            )}
          </div>

          {/* Desktop: Side panel (visible only on xl+) */}
          <div className="hidden xl:block">
            <SidePanel s={s} />
          </div>
        </div>
    </div>
  );
}