import { useSeoMeta } from '@unhead/react';
import { Layout } from '@/components/Layout';
import { WalletModal } from '@/components/WalletModal';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
import { useWallet } from '@/hooks/useWallet';
import { useNWC } from '@/hooks/useNWCContext';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { useCashu } from '@/hooks/wallet/useCashu';
import { useSatsToUsd } from '@/hooks/useExchangeRate';
import { LoginArea } from '@/components/auth/LoginArea';
import { CashuWalletCard } from '@/components/wallet/CashuWalletCard';
import { LightningPrivacyTips } from '@/components/wallet/LightningPrivacyTips';
import { WalletComparisonGuide } from '@/components/wallet/WalletComparisonGuide';
import {
  Wallet,
  Zap,
  Settings,
  CheckCircle,
  XCircle,
  ExternalLink,
  Globe,
  WalletMinimal,
  Info,
  Nut,
  ChevronRight,
  Bitcoin,
} from 'lucide-react';

// ─── Wallet Status Card ───────────────────────────────────────────────────────

function WalletStatusCard() {
  const { webln } = useWallet();
  const { connections } = useNWC();
  const { totalBalance: cashuBalance, isInitialized: hasCashu } = useCashu();
  const cashuUsd = useSatsToUsd(cashuBalance);
  const hasNWC = connections.length > 0 && connections.some(c => c.isConnected);
  const isReady = webln || hasNWC || hasCashu;

  return (
    <Card className={isReady ? 'border-green-500/30 bg-green-950/10' : 'border-gray-700'}>
      <CardHeader className="pb-3 px-4 pt-4">
        <div className="flex items-center justify-between">
          <CardTitle className="flex items-center gap-2 text-base">
            <Wallet className="h-5 w-5 text-primary flex-shrink-0" />
            Wallet Status
          </CardTitle>
          <Badge
            variant={isReady ? 'default' : 'secondary'}
            className={isReady ? 'bg-green-500/20 text-green-400 border-green-500/30 text-xs' : 'text-xs'}
          >
            {isReady ? '✓ Ready' : 'Not Connected'}
          </Badge>
        </div>
        <CardDescription className="text-xs mt-1">
          {isReady
            ? 'Your wallet is connected and ready to send zaps!'
            : 'Connect a wallet to enable Lightning zaps'}
        </CardDescription>
      </CardHeader>
      <CardContent className="px-4 pb-4 space-y-2">
        {/* Cashu */}
        <div className="flex items-center justify-between p-3 bg-muted/40 rounded-xl min-h-[56px]">
          <div className="flex items-center gap-3 min-w-0">
            <div className="w-9 h-9 rounded-lg bg-orange-500/15 flex items-center justify-center flex-shrink-0">
              <Nut className="h-4 w-4 text-orange-500" />
            </div>
            <div className="min-w-0">
              <p className="font-semibold text-sm">Cashu Wallet</p>
              <p className="text-xs text-muted-foreground truncate">
                {hasCashu && cashuBalance > 0
                  ? `${cashuBalance.toLocaleString()} sats${cashuUsd ? ` · $${cashuUsd.toFixed(2)}` : ''}`
                  : 'Built-in ecash wallet'}
              </p>
            </div>
          </div>
          {hasCashu
            ? <CheckCircle className="h-5 w-5 text-green-500 flex-shrink-0" />
            : <XCircle className="h-5 w-5 text-muted-foreground/50 flex-shrink-0" />}
        </div>

        {/* WebLN */}
        <div className="flex items-center justify-between p-3 bg-muted/40 rounded-xl min-h-[56px]">
          <div className="flex items-center gap-3 min-w-0">
            <div className="w-9 h-9 rounded-lg bg-blue-500/15 flex items-center justify-center flex-shrink-0">
              <Globe className="h-4 w-4 text-blue-400" />
            </div>
            <div className="min-w-0">
              <p className="font-semibold text-sm">WebLN</p>
              <p className="text-xs text-muted-foreground">Browser extension wallet</p>
            </div>
          </div>
          {webln
            ? <CheckCircle className="h-5 w-5 text-green-500 flex-shrink-0" />
            : <XCircle className="h-5 w-5 text-muted-foreground/50 flex-shrink-0" />}
        </div>

        {/* NWC */}
        <div className="flex items-center justify-between p-3 bg-muted/40 rounded-xl min-h-[56px]">
          <div className="flex items-center gap-3 min-w-0">
            <div className="w-9 h-9 rounded-lg bg-purple-500/15 flex items-center justify-center flex-shrink-0">
              <WalletMinimal className="h-4 w-4 text-purple-400" />
            </div>
            <div className="min-w-0">
              <p className="font-semibold text-sm">Nostr Wallet Connect</p>
              <p className="text-xs text-muted-foreground">
                {connections.length > 0
                  ? `${connections.length} wallet${connections.length !== 1 ? 's' : ''} connected`
                  : 'Remote wallet connection'}
              </p>
            </div>
          </div>
          {hasNWC
            ? <CheckCircle className="h-5 w-5 text-green-500 flex-shrink-0" />
            : <XCircle className="h-5 w-5 text-muted-foreground/50 flex-shrink-0" />}
        </div>

        <WalletModal>
          <Button className="w-full gap-2 mt-1 h-12 rounded-xl font-bold">
            <Settings className="h-4 w-4" />
            Manage Wallets
          </Button>
        </WalletModal>
      </CardContent>
    </Card>
  );
}

// ─── Zaps Info Card ───────────────────────────────────────────────────────────

function ZapsInfoCard() {
  const items = [
    { emoji: '⚡', title: 'Instant', desc: 'Payments settle in seconds over Lightning' },
    { emoji: '🔐', title: 'Flexible custody', desc: 'Use your own wallet or a custodial service' },
    { emoji: '🥜', title: 'NutZaps for privacy', desc: "Cashu ecash — mints can't see who pays whom" },
    { emoji: '💜', title: 'Value for value', desc: 'Support creators directly' },
  ];

  return (
    <Card className="border-gray-700">
      <CardHeader className="px-4 pt-4 pb-3">
        <CardTitle className="flex items-center gap-2 text-base">
          <Zap className="h-5 w-5 text-amber-500" />
          What are Zaps?
        </CardTitle>
      </CardHeader>
      <CardContent className="px-4 pb-4 space-y-2">
        <p className="text-sm text-muted-foreground leading-relaxed">
          Zaps are Lightning micropayments — send sats instantly to any skater, spot creator, or coach. No middleman, no platform cut.
        </p>
        <div className="grid grid-cols-1 sm:grid-cols-2 gap-2 pt-1">
          {items.map((item) => (
            <div key={item.title} className="flex items-start gap-3 p-3 bg-muted/40 rounded-xl">
              <span className="text-xl flex-shrink-0 mt-0.5">{item.emoji}</span>
              <div>
                <p className="font-semibold text-sm">{item.title}</p>
                <p className="text-xs text-muted-foreground leading-snug">{item.desc}</p>
              </div>
            </div>
          ))}
        </div>
      </CardContent>
    </Card>
  );
}

// ─── Recommended Wallets ──────────────────────────────────────────────────────

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

  return (
    <Card className="border-gray-700">
      <CardHeader className="px-4 pt-4 pb-3">
        <CardTitle className="flex items-center gap-2 text-base">
          <Info className="h-5 w-5" />
          Recommended Wallets
        </CardTitle>
        <CardDescription className="text-xs">Get started with one of these Lightning wallets</CardDescription>
      </CardHeader>
      <CardContent className="px-4 pb-4 space-y-2">
        {wallets.map((w) => (
          <a
            key={w.name}
            href={w.url}
            target="_blank"
            rel="noopener noreferrer"
            className="flex items-center justify-between p-3 bg-muted/40 rounded-xl hover:bg-muted active:scale-[0.98] transition-all group min-h-[56px]"
          >
            <div className="flex items-center gap-3 min-w-0">
              <div className="w-9 h-9 rounded-lg bg-white/5 flex items-center justify-center flex-shrink-0">
                <Wallet className={`h-4 w-4 ${w.color}`} />
              </div>
              <div className="min-w-0">
                <div className="flex items-center gap-2">
                  <span className="font-semibold text-sm group-hover:text-primary transition-colors">{w.name}</span>
                  <Badge variant="outline" className="text-[10px] px-1.5 py-0 h-4">{w.type}</Badge>
                </div>
                <p className="text-xs text-muted-foreground truncate">{w.desc}</p>
              </div>
            </div>
            <ChevronRight className="h-4 w-4 text-muted-foreground group-hover:text-primary flex-shrink-0 transition-colors" />
          </a>
        ))}
        <a
          href="https://planb.academy/en/tutorials/wallet"
          target="_blank"
          rel="noopener noreferrer"
          className="flex items-center gap-2 text-xs text-orange-400 hover:text-orange-300 transition-colors pt-1"
        >
          <ExternalLink className="h-3.5 w-3.5 flex-shrink-0" />
          Learn more at Plan B Academy
        </a>
      </CardContent>
    </Card>
  );
}

// ─── Not Logged In ────────────────────────────────────────────────────────────

function NotLoggedInCard() {
  return (
    <Card className="border-dashed border-gray-700">
      <CardContent className="py-12 px-6 text-center">
        <div className="w-16 h-16 rounded-2xl bg-[#ff0040]/10 flex items-center justify-center mx-auto mb-4">
          <Wallet className="h-8 w-8 text-[#ff0040]/60" />
        </div>
        <h3 className="text-lg font-bold mb-2">Login Required</h3>
        <p className="text-muted-foreground text-sm max-w-xs mx-auto mb-6 leading-relaxed">
          Log in with your Nostr account to connect your Lightning wallet and start zapping.
        </p>
        <LoginArea className="justify-center" />
      </CardContent>
    </Card>
  );
}

// ─── Balance Hero Banner ──────────────────────────────────────────────────────

function BalanceHero() {
  const { totalBalance: cashuBalance, isInitialized: hasCashu } = useCashu();
  const cashuUsd = useSatsToUsd(cashuBalance);
  const { webln } = useWallet();
  const { connections } = useNWC();
  const hasNWC = connections.length > 0 && connections.some(c => c.isConnected);

  return (
    <div className="relative overflow-hidden rounded-2xl border border-orange-500/30 bg-gradient-to-br from-orange-950/40 via-black to-yellow-950/20 p-5">
      {/* Background glow */}
      <div className="absolute -top-8 -right-8 w-32 h-32 bg-orange-500/10 rounded-full blur-2xl pointer-events-none" />
      <div className="absolute -bottom-6 -left-6 w-24 h-24 bg-yellow-500/10 rounded-full blur-2xl pointer-events-none" />

      <div className="relative flex items-center justify-between gap-4">
        <div>
          <div className="flex items-center gap-2 mb-1">
            <Bitcoin className="h-4 w-4 text-orange-400" />
            <span className="text-xs font-bold uppercase tracking-widest text-orange-400/80">Cashu Balance</span>
          </div>
          <div className="text-3xl font-black tabular-nums leading-none">
            {hasCashu ? cashuBalance.toLocaleString() : '—'}
            <span className="text-base font-semibold text-muted-foreground ml-2">sats</span>
          </div>
          {cashuUsd !== null && cashuBalance > 0 && (
            <div className="text-sm text-muted-foreground mt-1">
              ≈ ${cashuUsd.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
            </div>
          )}
          {/* Wallet status pills */}
          <div className="flex flex-wrap gap-1.5 mt-3">
            {hasCashu && (
              <span className="inline-flex items-center gap-1 px-2 py-0.5 rounded-full bg-orange-500/20 border border-orange-500/30 text-[10px] font-bold text-orange-400">
                <Nut className="h-2.5 w-2.5" /> Cashu
              </span>
            )}
            {webln && (
              <span className="inline-flex items-center gap-1 px-2 py-0.5 rounded-full bg-blue-500/20 border border-blue-500/30 text-[10px] font-bold text-blue-400">
                <Globe className="h-2.5 w-2.5" /> WebLN
              </span>
            )}
            {hasNWC && (
              <span className="inline-flex items-center gap-1 px-2 py-0.5 rounded-full bg-purple-500/20 border border-purple-500/30 text-[10px] font-bold text-purple-400">
                <WalletMinimal className="h-2.5 w-2.5" /> NWC
              </span>
            )}
            {!hasCashu && !webln && !hasNWC && (
              <span className="inline-flex items-center gap-1 px-2 py-0.5 rounded-full bg-gray-700/50 border border-gray-600 text-[10px] font-semibold text-gray-400">
                No wallet connected
              </span>
            )}
          </div>
        </div>

        {/* Manage button */}
        <WalletModal>
          <button className="flex-shrink-0 flex flex-col items-center gap-1.5 px-3 py-2.5 rounded-xl bg-orange-500/15 border border-orange-500/30 hover:bg-orange-500/25 active:scale-95 transition-all">
            <Settings className="h-5 w-5 text-orange-400" />
            <span className="text-[10px] font-bold text-orange-400 uppercase tracking-wide leading-none">Manage</span>
          </button>
        </WalletModal>
      </div>
    </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();

  return (
    <Layout>
      <div className="container px-3 xs:px-4 py-4 md:py-8 max-w-2xl mx-auto">
        {/* Header */}
        <div className="mb-4">
          <h1 className="text-2xl font-black uppercase tracking-wide flex items-center gap-2">
            <Wallet className="h-6 w-6 text-orange-400" />
            Wallet
          </h1>
          <p className="text-muted-foreground text-sm mt-0.5">
            Bitcoin Lightning payments &amp; zaps
          </p>
        </div>

        {user ? (
          <div className="space-y-4">
            {/* Balance hero — always at top for logged-in users */}
            <BalanceHero />

            {/* Quick Guide — collapsed by default */}
            <WalletComparisonGuide />

            <Tabs defaultValue="cashu" className="w-full">
              {/* Tab pills — full width, thumb-friendly height */}
              <TabsList className="grid w-full grid-cols-2 h-12 rounded-xl p-1 mb-4 bg-muted/60">
                <TabsTrigger
                  value="cashu"
                  className="gap-2 rounded-lg text-sm font-bold h-full data-[state=active]:bg-orange-500 data-[state=active]:text-white"
                >
                  <Nut className="h-4 w-4 flex-shrink-0" />
                  <span>Cashu</span>
                </TabsTrigger>
                <TabsTrigger
                  value="lightning"
                  className="gap-2 rounded-lg text-sm font-bold h-full data-[state=active]:bg-yellow-500 data-[state=active]:text-black"
                >
                  <Zap className="h-4 w-4 flex-shrink-0" />
                  <span>Lightning</span>
                </TabsTrigger>
              </TabsList>

              {/* Cashu tab */}
              <TabsContent value="cashu" className="space-y-4 mt-0">
                <CashuWalletCard />
              </TabsContent>

              {/* Lightning tab */}
              <TabsContent value="lightning" className="space-y-4 mt-0">
                <LightningPrivacyTips />
                <WalletStatusCard />
                <WalletResourcesCard />
                <ZapsInfoCard />
              </TabsContent>
            </Tabs>
          </div>
        ) : (
          <div className="space-y-4">
            <NotLoggedInCard />
            <ZapsInfoCard />
          </div>
        )}
      </div>
    </Layout>
  );
}