"use client";

import { useState } from "react";
import { useUser } from "@/lib/context";
import { Coffee, ShoppingBag, Music, Film, Dumbbell, Ticket, Check, Coins, Copy, ArrowRight, ShieldCheck } from "lucide-react";

interface BrandVoucher {
  id: string;
  brand: string;
  discount: string;
  cost: number;
  icon: React.ReactNode;
  color: string;
  bgGlow: string;
}

export default function SpendSection() {
  const { profile, claimVoucher, vouchers } = useUser();
  const [redeemedCode, setRedeemedCode] = useState<{ brand: string; code: string } | null>(null);
  const [errorMessage, setErrorMessage] = useState<string | null>(null);
  const [copiedId, setCopiedId] = useState<string | null>(null);

  const availableVouchers: BrandVoucher[] = [
    {
      id: "v-sbux",
      brand: "Starbucks",
      discount: "$10 Gift Card",
      cost: 150,
      icon: <Coffee className="w-8 h-8 text-emerald-400" />,
      color: "border-emerald-500/20 text-emerald-400 hover:border-emerald-500/50",
      bgGlow: "rgba(16, 185, 129, 0.15)",
    },
    {
      id: "v-nike",
      brand: "Nike",
      discount: "20% Discount Code",
      cost: 300,
      icon: <ShoppingBag className="w-8 h-8 text-white" />,
      color: "border-white/10 text-white hover:border-white/30",
      bgGlow: "rgba(255, 255, 255, 0.15)",
    },
    {
      id: "v-spotify",
      brand: "Spotify",
      discount: "1 Month Premium",
      cost: 200,
      icon: <Music className="w-8 h-8 text-green-400" />,
      color: "border-green-500/20 text-green-400 hover:border-green-500/50",
      bgGlow: "rgba(34, 197, 94, 0.15)",
    },
    {
      id: "v-netflix",
      brand: "Netflix",
      discount: "1 Month Free UltraHD",
      cost: 450,
      icon: <Film className="w-8 h-8 text-red-500" />,
      color: "border-red-500/20 text-red-500 hover:border-red-500/50",
      bgGlow: "rgba(239, 68, 68, 0.15)",
    },
    {
      id: "v-gymshark",
      brand: "Gymshark",
      discount: "30% Storewide Voucher",
      cost: 250,
      icon: <Dumbbell className="w-8 h-8 text-amber-500" />,
      color: "border-amber-500/20 text-amber-500 hover:border-amber-500/50",
      bgGlow: "rgba(245, 158, 11, 0.15)",
    },
    {
      id: "v-tickets",
      brand: "Ticketmaster",
      discount: "$25 Concert Coupon",
      cost: 400,
      icon: <Ticket className="w-8 h-8 text-sky-400" />,
      color: "border-sky-500/20 text-sky-400 hover:border-sky-500/50",
      bgGlow: "rgba(56, 189, 248, 0.15)",
    },
  ];

  const handleRedeem = (voucher: BrandVoucher) => {
    if (profile.lytBalance < voucher.cost) {
      setErrorMessage(`Insufficient LYT balance. You need ${voucher.cost - profile.lytBalance} more LYTs for this voucher.`);
      setTimeout(() => setErrorMessage(null), 5000);
      return;
    }

    const res = claimVoucher(voucher.brand, voucher.discount, voucher.cost);
    if (res.success && res.code) {
      setRedeemedCode({ brand: voucher.brand, code: res.code });
      // Clear popup after a while
      setTimeout(() => setRedeemedCode(null), 10000);
    }
  };

  const copyToClipboard = (id: string, text: string) => {
    navigator.clipboard.writeText(text);
    setCopiedId(id);
    setTimeout(() => setCopiedId(null), 3000);
  };

  return (
    <section id="spend" className="py-24 bg-dark relative overflow-hidden">
      {/* Visual background glows */}
      <div className="absolute top-1/4 right-0 w-[500px] h-[500px] rounded-full bg-primary/5 blur-[150px] pointer-events-none" />
      <div className="absolute bottom-1/4 left-0 w-[500px] h-[500px] rounded-full bg-accent-pink/5 blur-[150px] pointer-events-none" />

      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 relative z-10">
        
        {/* Section Header */}
        <div className="text-center max-w-3xl mx-auto mb-16 space-y-4">
          <span className="text-accent-purple font-extrabold text-xs tracking-widest uppercase">
            Spend Your LYTs
          </span>
          <h2 className="text-3xl sm:text-5xl font-extrabold font-sora text-white leading-tight">
            Claim Vouchers at <span className="text-transparent bg-clip-text bg-gradient-to-r from-accent-pink via-accent-purple to-accent-lime">Your Favorite Brands</span>
          </h2>
          <p className="text-white/60 text-base sm:text-lg">
            Redeem your accumulated LYT coins for gift cards, subscriptions, and discounts. Click redeem to generate a checkout code.
          </p>
        </div>

        {/* Dynamic Warning Alert */}
        {errorMessage && (
          <div className="max-w-xl mx-auto mb-8 bg-red-950/40 border border-red-500/20 text-red-200 px-5 py-4 rounded-2xl flex items-center justify-between text-sm animate-bounce">
            <span>{errorMessage}</span>
            <a href="#play" className="text-primary font-bold underline hover:no-underline">Earn LYTs fast</a>
          </div>
        )}

        {/* Success Modal Popup */}
        {redeemedCode && (
          <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-dark/80 backdrop-blur-sm animate-in fade-in duration-200">
            <div className="glassmorphism max-w-md w-full p-8 rounded-3xl border border-accent-lime/30 text-center space-y-6 shadow-[0_0_50px_rgba(200,255,55,0.15)]">
              <div className="w-16 h-16 rounded-full bg-accent-lime/10 border border-accent-lime/30 mx-auto flex items-center justify-center text-accent-lime">
                <ShieldCheck className="w-8 h-8 animate-pulse" />
              </div>
              
              <div className="space-y-2">
                <h3 className="text-2xl font-bold font-sora text-white">Redemption Successful!</h3>
                <p className="text-white/60 text-sm">
                  You successfully claimed your <span className="text-white font-bold">{redeemedCode.brand}</span> voucher code.
                </p>
              </div>

              {/* Code Shelf */}
              <div className="bg-white/5 border border-white/10 rounded-2xl p-4 flex items-center justify-between">
                <code className="text-xl font-mono font-bold tracking-wider text-accent-lime">{redeemedCode.code}</code>
                <button
                  onClick={() => copyToClipboard("modal", redeemedCode.code)}
                  className="p-2.5 rounded-xl bg-white/5 hover:bg-white/10 text-white/80 hover:text-white transition-colors cursor-pointer"
                >
                  {copiedId === "modal" ? <Check className="w-5 h-5 text-accent-lime" /> : <Copy className="w-5 h-5" />}
                </button>
              </div>

              <div className="flex flex-col gap-2">
                <button
                  onClick={() => setRedeemedCode(null)}
                  className="w-full py-3 rounded-xl bg-primary text-dark font-extrabold text-sm tracking-wider cursor-pointer"
                >
                  Awesome, Thanks!
                </button>
                <span className="text-[10px] text-white/40">Code is also saved to your Active Vouchers panel below.</span>
              </div>
            </div>
          </div>
        )}

        {/* Voucher Grid */}
        <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-6 mb-20">
          {availableVouchers.map((voucher) => {
            const isAffordable = profile.lytBalance >= voucher.cost;
            return (
              <div
                key={voucher.id}
                style={{
                  boxShadow: `0 10px 30px -15px ${voucher.bgGlow}`,
                }}
                className={`glassmorphism rounded-3xl p-6 flex flex-col justify-between border transition-all duration-300 transform hover:-translate-y-1.5 ${voucher.color}`}
              >
                <div className="space-y-6">
                  {/* Brand Header */}
                  <div className="flex justify-between items-start">
                    <div className="p-3.5 bg-white/5 rounded-2xl border border-white/5 flex items-center justify-center">
                      {voucher.icon}
                    </div>
                    <div className="flex items-center space-x-1.5 px-3 py-1 rounded-full bg-white/5 border border-white/10 font-sora font-extrabold text-xs text-white">
                      <Coins className="w-3.5 h-3.5 text-primary" />
                      <span>{voucher.cost} LYTs</span>
                    </div>
                  </div>

                  {/* Info */}
                  <div className="space-y-1.5">
                    <h3 className="text-xl font-bold font-sora text-white">{voucher.brand}</h3>
                    <p className="text-white/60 text-sm font-semibold">{voucher.discount}</p>
                  </div>
                </div>

                {/* Bottom action */}
                <div className="mt-8">
                  <button
                    onClick={() => handleRedeem(voucher)}
                    className={`w-full py-3.5 rounded-xl font-extrabold text-xs tracking-wider uppercase transition-all flex items-center justify-center gap-1.5 cursor-pointer ${
                      isAffordable
                        ? "bg-white/5 hover:bg-primary hover:text-dark text-white border border-white/10 hover:border-primary shadow-sm"
                        : "bg-white/2 text-white/20 border border-white/5 cursor-not-allowed"
                    }`}
                  >
                    <span>Redeem Voucher</span>
                    <ArrowRight className="w-4 h-4" />
                  </button>
                </div>
              </div>
            );
          })}
        </div>

        {/* Claimed Vouchers Display */}
        {vouchers.length > 0 && (
          <div className="border-t border-white/5 pt-16">
            <h3 className="text-2xl font-bold font-sora text-white mb-6 flex items-center gap-2">
              <span>Your Claimed Vouchers</span>
              <span className="text-xs px-2.5 py-1 rounded-full bg-accent-lime/10 border border-accent-lime/20 text-accent-lime">
                {vouchers.length} Total
              </span>
            </h3>
            
            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
              {vouchers.map((v) => (
                <div
                  key={v.id}
                  className="bg-[#0b0b0b] border border-white/5 rounded-2xl p-5 flex items-center justify-between gap-4 animate-in slide-in-from-bottom-2 duration-300"
                >
                  <div className="space-y-1">
                    <span className="text-white font-extrabold text-sm">{v.brand}</span>
                    <p className="text-white/60 text-xs">{v.discount}</p>
                    <span className="text-[10px] text-white/40 block">Claimed on {v.claimedAt}</span>
                  </div>

                  <div className="text-right space-y-1.5">
                    <span className="inline-block px-2.5 py-1 bg-white/5 border border-white/10 rounded-lg text-xs font-mono font-extrabold text-accent-lime">
                      {v.code}
                    </span>
                    <button
                      onClick={() => copyToClipboard(v.id, v.code)}
                      className="text-[10px] font-bold text-primary hover:underline flex items-center justify-end gap-1 ml-auto cursor-pointer"
                    >
                      {copiedId === v.id ? (
                        <span className="text-accent-lime">Copied!</span>
                      ) : (
                        <>
                          <Copy className="w-3 h-3" />
                          <span>Copy Code</span>
                        </>
                      )}
                    </button>
                  </div>
                </div>
              ))}
            </div>
          </div>
        )}

      </div>
    </section>
  );
}