import { useState } from 'react';
import { useSeoMeta } from '@unhead/react';
import { Layout } from '@/components/Layout';
import { WalletModal } from '@/components/WalletModal';
import { Badge } from '@/components/ui/badge';
import { useWallet } from '@/hooks/useWallet';
import { useNWC } from '@/hooks/useNWCContext';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { useCashu } from '@/hooks/wallet/useCashu';
import { LoginArea } from '@/components/auth/LoginArea';
import { CashuWalletCard } from '@/components/wallet/CashuWalletCard';
import { cn } from '@/lib/utils';
import {
  Zap,
  Settings,
  CheckCircle,
  XCircle,
  Globe,
  WalletMinimal,
  Nut,
  ChevronRight,
  ExternalLink,
  ChevronDown,
  ChevronUp,
  Wallet,
} from 'lucide-react';

// ─── Wallet status bar ────────────────────────────────────────────────────────

function WalletStatusBar() {
  const { webln } = useWallet();
  const { connections } = useNWC();
  const { isInitialized: hasCashu } = useCashu();
  const hasNWC = connections.length > 0 && connections.some((c) => c.isConnected);
  const isReady = webln || hasNWC || hasCashu;

  return (
    <div className="flex items-center justify-between gap-3">
      {/* Status pills */}
      <div className="flex items-center gap-1.5">
        <StatusPill icon={Nut} label="Cashu" active={hasCashu} color="text-orange-400" activeBg="bg-orange-500/20 border-orange-500/30" />
        <StatusPill icon={Globe} label="WebLN" active={!!webln} color="text-blue-400" activeBg="bg-blue-500/20 border-blue-500/30" />
        <StatusPill icon={WalletMinimal} label="NWC" active={hasNWC} color="text-purple-400" activeBg="bg-purple-500/20 border-purple-500/30" />
      </div>

      {/* Manage wallets */}
      <WalletModal>
        <button className="flex items-center gap-1.5 px-3 py-1.5 rounded-xl bg-white/5 hover:bg-white/10 border border-white/8 active:scale-95 transition-all flex-shrink-0">
          <Settings className="h-3.5 w-3.5 text-orange-400" />
          <span className="text-xs font-bold text-white">Manage</span>
          {isReady
            ? <Badge className="bg-green-500/20 text-green-400 border-green-500/30 text-[9px] px-1 py-0 leading-none">ON</Badge>
            : <ChevronRight className="h-3 w-3 text-muted-foreground" />
          }
        </button>
      </WalletModal>
    </div>
  );
}

function StatusPill({
  icon: Icon, label, active, color, activeBg,
}: {
  icon: React.ComponentType<{ className?: string }>;
  label: string;
  active: boolean;
  color: string;
  activeBg: string;
}) {
  return (
    <div className={cn(
      'flex items-center gap-1 px-2 py-1 rounded-full border text-[10px] font-bold transition-all',
      active ? `${activeBg} ${color}` : 'bg-white/3 border-white/8 text-gray-600'
    )}>
      <Icon className="h-2.5 w-2.5" />
      {label}
      {active
        ? <CheckCircle className="h-2.5 w-2.5 text-green-500" />
        : <XCircle className="h-2.5 w-2.5 text-gray-700" />
      }
    </div>
  );
}

// ─── Get a wallet (collapsible) ───────────────────────────────────────────────

function GetAWallet() {
  const [open, setOpen] = useState(false);

  const wallets = [
    { name: 'Minibits', desc: 'Mobile Cashu · NWC', url: 'https://www.minibits.cash', color: 'text-orange-400' },
    { name: 'Alby', desc: 'Browser extension · WebLN + NWC', url: 'https://getalby.com', color: 'text-yellow-400' },
    { name: 'Zeus', desc: 'Self-custodial Lightning', url: 'https://zeusln.com', color: 'text-blue-400' },
    { name: 'Coinos', desc: 'Web-based · works everywhere', url: 'https://coinos.io', color: 'text-green-400' },
  ];

  return (
    <div className="rounded-2xl border border-white/8 overflow-hidden">
      <button
        onClick={() => setOpen((v) => !v)}
        className="w-full flex items-center justify-between px-4 py-3.5 bg-white/3 hover:bg-white/5 transition-all"
      >
        <div className="flex items-center gap-2">
          <Zap className="h-4 w-4 text-yellow-400" />
          <span className="text-sm font-black uppercase tracking-wide text-white">Get a Wallet</span>
        </div>
        {open
          ? <ChevronUp className="h-4 w-4 text-muted-foreground" />
          : <ChevronDown className="h-4 w-4 text-muted-foreground" />
        }
      </button>

      {open && (
        <div className="divide-y divide-white/5">
          {wallets.map((w) => (
            <a
              key={w.name}
              href={w.url}
              target="_blank"
              rel="noopener noreferrer"
              className="flex items-center justify-between px-4 py-3 hover:bg-white/5 active:scale-[0.99] transition-all"
            >
              <div className="min-w-0">
                <p className={cn('font-bold text-sm', w.color)}>{w.name}</p>
                <p className="text-xs text-muted-foreground">{w.desc}</p>
              </div>
              <ExternalLink className="h-3.5 w-3.5 text-muted-foreground flex-shrink-0" />
            </a>
          ))}
          <div className="px-4 py-3">
            <a
              href="https://planb.academy/en/tutorials/wallet"
              target="_blank"
              rel="noopener noreferrer"
              className="text-xs text-orange-400 hover:text-orange-300 transition-colors flex items-center gap-1.5"
            >
              <ExternalLink className="h-3 w-3" />
              Learn more at Plan B Academy
            </a>
          </div>
        </div>
      )}
    </div>
  );
}

// ─── What are zaps (collapsible, hidden once wallet connected) ────────────────

function WhatAreZaps({ walletConnected }: { walletConnected: boolean }) {
  const [open, setOpen] = useState(!walletConnected);

  if (walletConnected && !open) {
    return (
      <button
        onClick={() => setOpen(true)}
        className="text-xs text-muted-foreground/40 hover:text-muted-foreground transition-colors flex items-center gap-1 mx-auto"
      >
        <ChevronDown className="h-3 w-3" />
        What are zaps?
      </button>
    );
  }

  return (
    <div className="rounded-2xl border border-white/8 overflow-hidden">
      <button
        onClick={() => setOpen((v) => !v)}
        className="w-full flex items-center justify-between px-4 py-3.5 bg-white/3 hover:bg-white/5 transition-all"
      >
        <div className="flex items-center gap-2">
          <Zap className="h-4 w-4 text-amber-500" />
          <span className="text-sm font-black uppercase tracking-wide text-white">What are Zaps?</span>
        </div>
        {open
          ? <ChevronUp className="h-4 w-4 text-muted-foreground" />
          : <ChevronDown className="h-4 w-4 text-muted-foreground" />
        }
      </button>

      {open && (
        <div className="px-4 pb-4 pt-3 space-y-3">
          <p className="text-sm text-muted-foreground leading-relaxed">
            Instant Bitcoin Lightning payments. Send sats to any skater, spot creator, or coach — no middleman, no platform cut.
          </p>
          <div className="grid grid-cols-2 gap-2">
            {[
              { emoji: '⚡', title: 'Instant', desc: 'Settles in seconds' },
              { emoji: '🔐', title: 'Flexible', desc: 'Your wallet, your keys' },
              { emoji: '🥜', title: 'Private', desc: 'Cashu hides who pays' },
              { emoji: '💜', title: 'Direct', desc: 'Value goes to creator' },
            ].map((item) => (
              <div key={item.title} className="flex items-start gap-2 p-2.5 bg-white/3 rounded-xl">
                <span className="text-base flex-shrink-0">{item.emoji}</span>
                <div>
                  <p className="font-bold text-xs text-white">{item.title}</p>
                  <p className="text-[11px] text-muted-foreground">{item.desc}</p>
                </div>
              </div>
            ))}
          </div>
        </div>
      )}
    </div>
  );
}

// ─── Not logged in ────────────────────────────────────────────────────────────

function NotLoggedIn() {
  return (
    <div className="flex flex-col items-center justify-center py-20 px-4 text-center">
      <div className="w-16 h-16 rounded-2xl bg-orange-500/10 flex items-center justify-center mb-4">
        <Wallet className="h-8 w-8 text-orange-500/60" />
      </div>
      <h3 className="text-lg font-black mb-2 text-white">Login Required</h3>
      <p className="text-muted-foreground text-sm max-w-xs mb-6 leading-relaxed">
        Log in with your Nostr account to connect your Lightning wallet and start zapping.
      </p>
      <LoginArea className="justify-center" />
    </div>
  );
}

// ─── Page ─────────────────────────────────────────────────────────────────────

export default function WalletPage() {
  useSeoMeta({
    title: 'Wallet - SkateSpots',
    description: 'Connect your Lightning wallet to send zaps to skaters and spot creators.',
  });

  const { user } = useCurrentUser();
  const { webln } = useWallet();
  const { connections } = useNWC();
  const { isInitialized: hasCashu } = useCashu();
  const hasNWC = connections.length > 0 && connections.some((c) => c.isConnected);
  const walletConnected = !!(webln || hasNWC || hasCashu);

  return (
    <Layout>
      <div className="container px-4 py-5 max-w-lg mx-auto">

        {/* Header */}
        <div className="mb-4">
          <h1 className="text-4xl md:text-5xl font-black uppercase leading-none mb-1">
            <span className="neon-orange">WALLET</span>
          </h1>
          <p className="text-muted-foreground text-sm">Bitcoin Lightning + Cashu</p>
        </div>

        {user ? (
          <div className="space-y-4">
            {/* Status bar + manage — compact single row */}
            <WalletStatusBar />

            {/* Cashu wallet — the one and only balance + send/receive UI */}
            <CashuWalletCard />

            {/* Get a wallet — collapsed by default */}
            <GetAWallet />

            {/* What are zaps — auto-collapses once wallet connected */}
            <WhatAreZaps walletConnected={walletConnected} />
          </div>
        ) : (
          <NotLoggedIn />
        )}
      </div>
    </Layout>
  );
}