import { useState, useEffect, useCallback } from 'react';
import { useCashu } from '@/hooks/wallet/useCashu';
import { useMintManager } from '@/hooks/wallet/useMintManager';
import { useLightningOperations } from '@/hooks/wallet/useLightningOperations';
import { useTokenOperations } from '@/hooks/wallet/useTokenOperations';
import { useHistoryManager } from '@/hooks/wallet/useHistoryManager';
import { useSatsToUsd } from '@/hooks/useExchangeRate';
import { useLightningAddress } from '@/hooks/useLightningAddress';
import { generateQRCode } from '@/lib/wallet/qrCodeGenerator';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import { Badge } from '@/components/ui/badge';
import { Alert, AlertDescription } from '@/components/ui/alert';
import { Skeleton } from '@/components/ui/skeleton';
import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select';
import { 
  Wallet, 
  ArrowDownCircle, 
  ArrowUpCircle, 
  History, 
  Copy, 
  ExternalLink,
  AlertCircle,
  Shield,
  ScanLine,
  Zap,
  Nut,
} from 'lucide-react';
import { useToast } from '@/hooks/useToast';
import { QRScannerModal } from '@/components/wallet/QRScannerModal';
import { MintPrivacyManager } from '@/components/wallet/MintPrivacyManager';
import { RecoveryPhraseDialog } from '@/components/wallet/RecoveryPhraseDialog';
import { isNativePlatform } from '@/lib/platform';
import { Smartphone } from 'lucide-react';

/**
 * The built-in Cashu (ecash) mint wallet only works where there's no browser
 * CORS jail — i.e. in the native app. In a plain web browser most mints block
 * requests (no Access-Control-Allow-Origin), so minting/melting fails. Rather
 * than ship a browser feature that unreliably errors, we gate the full wallet
 * to native and, in the browser, explain how to transact (zaps via a connected
 * Lightning wallet, or use the native app).
 *
 * Zaps/tips — the app's actual money flow — keep working in the browser via
 * NWC / WebLN / Lightning address, none of which touch a Cashu mint.
 */
export function CashuWalletCard() {
  if (!isNativePlatform()) {
    return <CashuWalletBrowserNotice />;
  }
  return <CashuWalletCardNative />;
}

function CashuWalletBrowserNotice() {
  return (
    <Card className="relative overflow-hidden border-orange-500/30 bg-gradient-to-br from-orange-500/[0.07] via-background to-yellow-500/[0.05]">
      {/* Ambient glow */}
      <div className="pointer-events-none absolute -top-16 -right-16 h-40 w-40 rounded-full bg-orange-500/10 blur-3xl" />
      <div className="pointer-events-none absolute -bottom-20 -left-10 h-40 w-40 rounded-full bg-yellow-500/[0.07] blur-3xl" />

      <CardHeader className="relative p-5 pb-3">
        <div className="flex items-center gap-3">
          <div className="relative flex h-11 w-11 items-center justify-center rounded-2xl bg-gradient-to-br from-orange-500 to-amber-500 shadow-lg shadow-orange-500/25">
            <Nut className="h-5 w-5 text-black" />
          </div>
          <div className="min-w-0">
            <CardTitle className="text-base font-black tracking-tight flex items-center gap-2">
              Built-in Ecash Wallet
              <Badge className="border-0 bg-orange-500/15 text-[10px] font-bold uppercase tracking-wider text-orange-400">
                App only
              </Badge>
            </CardTitle>
            <CardDescription className="text-xs mt-0.5">
              Self-custodial Cashu ecash, powered by Bitcoin Lightning
            </CardDescription>
          </div>
        </div>
      </CardHeader>

      <CardContent className="relative space-y-4 p-5 pt-1">
        {/* Native-only explainer — framed as a premium capability, not a disabled feature */}
        <div className="rounded-2xl border border-orange-500/20 bg-gradient-to-br from-orange-500/[0.08] to-transparent p-4">
          <div className="flex items-start gap-3">
            <div className="flex h-9 w-9 flex-shrink-0 items-center justify-center rounded-xl bg-orange-500/15">
              <Smartphone className="h-4 w-4 text-orange-400" />
            </div>
            <div className="space-y-1.5">
              <p className="text-sm font-bold leading-tight">Unlock the full wallet in the SkateSpots app</p>
              <p className="text-xs text-muted-foreground leading-relaxed">
                The built-in ecash wallet lets you mint, send and redeem Cashu tokens right at the
                spot. It lives in the native app, where it can talk to mints directly — browsers
                sandbox those connections for your security.
              </p>
            </div>
          </div>
        </div>

        {/* What works right here — the actual money flow */}
        <div className="rounded-2xl border bg-muted/30 p-4">
          <p className="text-sm font-bold flex items-center gap-2">
            <span className="flex h-6 w-6 items-center justify-center rounded-lg bg-amber-500/15">
              <Zap className="h-3.5 w-3.5 text-amber-500" />
            </span>
            Zap &amp; tip — works in your browser now
          </p>
          <p className="mt-2 text-xs text-muted-foreground leading-relaxed">
            Sending sats to spots, events, coaches and crews works right here. Just connect a
            Lightning wallet below — Nostr Wallet Connect or a browser extension like Alby. No
            Cashu mint needed.
          </p>
          <div className="mt-3 flex flex-wrap gap-1.5">
            {['Nostr Wallet Connect', 'Alby / WebLN', 'Lightning address'].map((label) => (
              <span
                key={label}
                className="inline-flex items-center gap-1 rounded-full border border-amber-500/25 bg-amber-500/10 px-2.5 py-1 text-[11px] font-semibold text-amber-500/90"
              >
                <span className="h-1.5 w-1.5 rounded-full bg-green-500" />
                {label}
              </span>
            ))}
          </div>
        </div>
      </CardContent>
    </Card>
  );
}

function CashuWalletCardNative() {
  const {
    coco,
    repositories,
    balances,
    mints,
    totalBalance,
    isInitialized,
    isLoading: walletLoading,
    error: walletError,
    mnemonic,
    getEncodedToken,
    refreshMints,
  } = useCashu();

  const usdValue = useSatsToUsd(totalBalance);
  const { toast } = useToast();
  const { getInvoice: getLightningInvoice, isLoading: isResolvingAddress } = useLightningAddress();

  const {
    activeMintUrl,
    setActiveMintUrl,
    handleAddMint,
    handleRemoveMintDirect,
    getCleanMintLabel,
  } = useMintManager({ coco, mints, repositories, refreshMints });

  const {
    quoteAmount,
    setQuoteAmount,
    showInvoiceModal,
    setShowInvoiceModal,
    currentInvoice,
    handleLightningReceive,
    isGeneratingInvoice,
    lightningInvoice,
    setLightningInvoice,
    isProcessingPayment,
    handleLightningSend,
  } = useLightningOperations({ coco, activeMintUrl, generateQRCode });

  const {
    tokenInput,
    setTokenInput,
    handleTokenReceive,
    isReceivingToken,
    sendAmount,
    setSendAmount,
    handleTokenSend,
    isCreatingToken,
    sentToken,
    setSentToken,
    sentTokenQRCode,
  } = useTokenOperations({ coco, activeMintUrl, generateQRCode, getEncodedToken });

  const { history, isLoading: historyLoading } = useHistoryManager({
    coco,
    repositories,
    mints,
  });

  // QR Scanner state
  const [showQRScanner, setShowQRScanner] = useState(false);

  // Recovery-phrase reveal dialog
  const [showRecoveryPhrase, setShowRecoveryPhrase] = useState(false);

  // Lightning address state. Its amount is kept SEPARATE from the token-send
  // amount (`sendAmount`) so switching between "Create Token" and "Pay Address"
  // never carries a stale value between two unrelated intents.
  const [lightningAddress, setLightningAddress] = useState('');
  const [lightningAddressAmount, setLightningAddressAmount] = useState('');

  // Set first mint as active if none selected
  useEffect(() => {
    if (mints.length > 0 && !activeMintUrl) {
      setActiveMintUrl(mints[0].url);
    }
  }, [mints, activeMintUrl, setActiveMintUrl]);

  // Handle QR scan result
  const handleQRScanResult = useCallback(async (result: { type: string; value: string }) => {
    setShowQRScanner(false);
    
    switch (result.type) {
      case 'cashu_token':
        setTokenInput(result.value);
        // Auto-receive
        if (coco) {
          try {
            await coco.wallet.receive(result.value);
            toast({ title: 'Token received', description: 'Cashu token redeemed successfully!' });
          } catch (err) {
            toast({ 
              variant: 'destructive', 
              title: 'Receive failed', 
              description: err instanceof Error ? err.message : 'Unknown error' 
            });
          }
        }
        break;
      case 'lightning_invoice':
        setLightningInvoice(result.value);
        break;
      case 'lightning_address':
        setLightningAddress(result.value);
        break;
      case 'bitcoin_address':
        // Recognized, but this is an ecash/Lightning wallet — no on-chain send.
        toast({
          variant: 'destructive',
          title: 'On-chain not supported here',
          description: 'That’s a Bitcoin address. This wallet only sends Cashu tokens and Lightning payments.',
        });
        break;
      case 'npub':
        toast({
          variant: 'destructive',
          title: 'That’s a Nostr profile',
          description: 'Scan a Cashu token, Lightning invoice, or Lightning address to pay.',
        });
        break;
      case 'clink_offer':
      case 'clink_debit':
        toast({
          variant: 'destructive',
          title: 'Payment code not supported yet',
          description: 'This wallet can’t pay CLINK codes yet. Use a Lightning invoice or address instead.',
        });
        break;
      default:
        toast({
          variant: 'destructive',
          title: 'Unrecognized QR code',
          description: 'Scan a Cashu token, Lightning invoice, or Lightning address.',
        });
    }
  }, [coco, setTokenInput, setLightningInvoice, toast]);

  // Handle paying a Lightning address
  const [isPayingAddress, setIsPayingAddress] = useState(false);
  const handlePayLightningAddress = useCallback(async () => {
    if (!lightningAddress || !lightningAddressAmount || !coco || !activeMintUrl) return;

    try {
      const amount = parseInt(lightningAddressAmount);
      if (isNaN(amount) || amount <= 0) {
        toast({ variant: 'destructive', title: 'Invalid amount', description: 'Please enter a valid amount' });
        return;
      }

      setIsPayingAddress(true);

      // First resolve the Lightning address to get an invoice
      const invoice = await getLightningInvoice({ lightningAddress, amountSats: amount });

      // Then pay the invoice using Cashu
      const meltQuote = await coco.quotes.createMeltQuote(activeMintUrl, invoice);
      await coco.quotes.payMeltQuote(activeMintUrl, meltQuote.quote);

      toast({ title: 'Payment sent', description: `Sent ${amount} sats to ${lightningAddress}` });
      setLightningAddress('');
      setLightningAddressAmount('');
    } catch (err) {
      toast({ 
        variant: 'destructive', 
        title: 'Payment failed', 
        description: err instanceof Error ? err.message : 'Unknown error' 
      });
    } finally {
      setIsPayingAddress(false);
    }
  }, [lightningAddress, lightningAddressAmount, coco, activeMintUrl, getLightningInvoice, toast]);

  // Copy to clipboard helper
  const copyToClipboard = async (text: string, label: string) => {
    try {
      await navigator.clipboard.writeText(text);
      toast({ title: 'Copied', description: `${label} copied to clipboard` });
    } catch (err) {
      console.error('Failed to copy:', err);
    }
  };

  // Show wallet loading state
  if (walletLoading) {
    return (
      <Card>
        <CardHeader>
          <CardTitle className="flex items-center gap-2">
            <Wallet className="h-5 w-5 text-orange-500" />
            Cashu Wallet
          </CardTitle>
          <CardDescription>Initializing wallet...</CardDescription>
        </CardHeader>
        <CardContent className="space-y-4">
          <Skeleton className="h-20 w-full" />
          <Skeleton className="h-10 w-full" />
          <Skeleton className="h-10 w-full" />
        </CardContent>
      </Card>
    );
  }

  // Show wallet error state
  if (walletError) {
    return (
      <Card className="border-destructive/50">
        <CardHeader>
          <CardTitle className="flex items-center gap-2 text-destructive">
            <AlertCircle className="h-5 w-5" />
            Wallet Error
          </CardTitle>
        </CardHeader>
        <CardContent>
          <Alert variant="destructive">
            <AlertCircle className="h-4 w-4" />
            <AlertDescription>{walletError.message}</AlertDescription>
          </Alert>
        </CardContent>
      </Card>
    );
  }

  return (
    <>
      <div className="space-y-4">
        {/* Main Wallet Card */}
        <Card className="border-orange-500/30 bg-gradient-to-br from-orange-500/5 to-yellow-500/5">
          <CardHeader className="p-4">
            <CardTitle className="text-base font-bold flex items-center gap-2">
              <Wallet className="h-5 w-5 text-orange-500" />
              Cashu Wallet
            </CardTitle>
            <CardDescription className="text-xs">
              Built-in ecash wallet — no external setup required
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-4 p-4 pt-0">
            {/* Balance Display — compact on mobile since BalanceHero already shows it */}
            <div className="flex items-center justify-between py-3 px-4 rounded-xl bg-orange-500/10 border border-orange-500/20">
              <div>
                <div className="text-[10px] text-orange-400/80 uppercase tracking-widest font-bold mb-0.5">Balance</div>
                <div className="text-2xl font-black tabular-nums leading-none">
                  {totalBalance.toLocaleString()}
                  <span className="text-sm font-semibold text-muted-foreground ml-1.5">sats</span>
                </div>
                {usdValue !== null && (
                  <div className="text-xs text-muted-foreground mt-0.5">
                    ≈ ${usdValue.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
                  </div>
                )}
              </div>
              <Nut className="h-8 w-8 text-orange-500/30 flex-shrink-0" />
            </div>

            {/* Active Mint Selector */}
            {mints.length > 0 && (
              <div className="space-y-1.5">
                <Label className="text-xs font-semibold text-muted-foreground uppercase tracking-wide">Active Mint</Label>
                <Select value={activeMintUrl || undefined} onValueChange={setActiveMintUrl}>
                  <SelectTrigger className="h-11">
                    <SelectValue placeholder="Select a mint" />
                  </SelectTrigger>
                  <SelectContent>
                    {mints.map((mint) => (
                      <SelectItem key={mint.url} value={mint.url}>
                        <div className="flex items-center justify-between gap-3">
                          <span>{getCleanMintLabel(mint)}</span>
                          <span className="text-xs text-muted-foreground">
                            {balances[mint.url] || 0} sats
                          </span>
                        </div>
                      </SelectItem>
                    ))}
                  </SelectContent>
                </Select>
              </div>
            )}

            {/* Main Actions */}
            <Tabs defaultValue="receive" className="w-full">
              <TabsList className="grid w-full grid-cols-2 h-11 rounded-xl">
                <TabsTrigger value="receive" className="gap-2 rounded-lg h-full font-bold text-sm data-[state=active]:bg-green-600 data-[state=active]:text-white">
                  <ArrowDownCircle className="h-4 w-4" />
                  Receive
                </TabsTrigger>
                <TabsTrigger value="send" className="gap-2 rounded-lg h-full font-bold text-sm data-[state=active]:bg-red-600 data-[state=active]:text-white">
                  <ArrowUpCircle className="h-4 w-4" />
                  Send
                </TabsTrigger>
              </TabsList>

              {/* Receive Tab */}
              <TabsContent value="receive" className="space-y-4 mt-4">
                {/* Lightning Invoice */}
                 <div className="space-y-3">
                   <Label className="text-sm font-semibold">⚡ Receive via Lightning</Label>
                   <div className="flex flex-col gap-2">
                     <Input
                       type="number"
                       inputMode="numeric"
                       placeholder="Amount in sats"
                       value={quoteAmount}
                       onChange={(e) => setQuoteAmount(e.target.value)}
                       className="h-11 min-w-0"
                     />
                     <Button
                       onClick={handleLightningReceive}
                       disabled={!activeMintUrl || !quoteAmount || isGeneratingInvoice}
                       className="h-11 bg-orange-500 hover:bg-orange-600 font-bold"
                     >
                       {isGeneratingInvoice ? 'Generating…' : 'Generate Invoice'}
                     </Button>
                   </div>
                 </div>

                <div className="relative">
                  <div className="absolute inset-0 flex items-center">
                    <span className="w-full border-t" />
                  </div>
                  <div className="relative flex justify-center text-xs uppercase">
                    <span className="bg-background px-2 text-muted-foreground">Or</span>
                  </div>
                </div>

                {/* Cashu Token */}
                 <div className="space-y-3">
                   <div className="flex items-center justify-between">
                     <Label className="text-sm font-semibold">🥜 Receive Cashu Token</Label>
                     <Button
                       variant="outline"
                       size="sm"
                       className="h-9 gap-1.5 px-3"
                       onClick={() => setShowQRScanner(true)}
                     >
                       <ScanLine className="h-4 w-4" />
                       Scan QR
                     </Button>
                   </div>
                   <div className="space-y-2">
                     <Input
                       placeholder="Paste Cashu token (cashu...)"
                       value={tokenInput}
                       onChange={(e) => setTokenInput(e.target.value)}
                       className="font-mono text-xs h-11"
                     />
                     <Button
                       onClick={handleTokenReceive}
                       disabled={!tokenInput || isReceivingToken}
                       className="w-full h-11 bg-green-600 hover:bg-green-700 font-bold"
                     >
                       {isReceivingToken ? 'Receiving…' : 'Receive Token'}
                     </Button>
                   </div>
                 </div>
              </TabsContent>

              {/* Send Tab */}
              <TabsContent value="send" className="space-y-4 mt-4">
                {/* Send Token */}
                 <div className="space-y-3">
                   <Label className="text-sm font-semibold">🥜 Create Cashu Token</Label>
                   <div className="flex flex-col gap-2">
                     <Input
                       type="number"
                       inputMode="numeric"
                       placeholder="Amount in sats"
                       value={sendAmount}
                       onChange={(e) => setSendAmount(e.target.value)}
                       className="min-w-0 h-11"
                     />
                     <Button
                       onClick={handleTokenSend}
                       disabled={!activeMintUrl || !sendAmount || isCreatingToken}
                       className="h-11 bg-orange-500 hover:bg-orange-600 font-bold"
                     >
                       {isCreatingToken ? 'Creating…' : 'Create Token'}
                     </Button>
                   </div>
                 </div>

                <div className="relative">
                  <div className="absolute inset-0 flex items-center">
                    <span className="w-full border-t" />
                  </div>
                  <div className="relative flex justify-center text-xs uppercase">
                    <span className="bg-background px-2 text-muted-foreground">Or</span>
                  </div>
                </div>

                {/* Pay Lightning Invoice */}
                 <div className="space-y-3">
                   <div className="flex items-center justify-between">
                     <Label className="text-sm font-semibold">⚡ Pay Lightning Invoice</Label>
                     <Button
                       variant="outline"
                       size="sm"
                       className="h-9 gap-1.5 px-3"
                       onClick={() => setShowQRScanner(true)}
                     >
                       <ScanLine className="h-4 w-4" />
                       Scan QR
                     </Button>
                   </div>
                   <div className="space-y-2">
                     <Input
                       placeholder="Paste Lightning invoice (lnbc...)"
                       value={lightningInvoice}
                       onChange={(e) => setLightningInvoice(e.target.value)}
                       className="font-mono text-xs h-11"
                     />
                     <Button
                       onClick={handleLightningSend}
                       disabled={!lightningInvoice || isProcessingPayment}
                       className="w-full h-11 bg-blue-600 hover:bg-blue-700 font-bold"
                     >
                       <Zap className="h-4 w-4 mr-2" />
                       {isProcessingPayment ? 'Processing...' : 'Pay Invoice'}
                     </Button>
                   </div>
                 </div>

                <div className="relative">
                  <div className="absolute inset-0 flex items-center">
                    <span className="w-full border-t" />
                  </div>
                  <div className="relative flex justify-center text-xs uppercase">
                    <span className="bg-background px-2 text-muted-foreground">Or</span>
                  </div>
                </div>

                {/* Pay Lightning Address */}
                 <div className="space-y-3">
                   <Label className="text-sm font-semibold">📧 Pay Lightning Address</Label>
                   <div className="space-y-2">
                     <Input
                       placeholder="user@domain.com"
                       value={lightningAddress}
                       onChange={(e) => setLightningAddress(e.target.value)}
                       className="h-11"
                     />
                     <Input
                       type="number"
                       inputMode="numeric"
                       placeholder="Amount in sats"
                       value={lightningAddressAmount}
                       onChange={(e) => setLightningAddressAmount(e.target.value)}
                       className="h-11"
                     />
                     <Button
                       onClick={handlePayLightningAddress}
                       disabled={!lightningAddress || !lightningAddressAmount || isResolvingAddress || isPayingAddress}
                       className="w-full h-11 bg-purple-600 hover:bg-purple-700 font-bold"
                     >
                       {isResolvingAddress || isPayingAddress ? 'Sending…' : 'Send to Address'}
                     </Button>
                   </div>
                 </div>
              </TabsContent>
            </Tabs>

            {/* History */}
            {history.length > 0 && (
              <div className="space-y-3">
                <Label className="text-xs font-semibold text-muted-foreground uppercase tracking-wide flex items-center gap-2">
                  <History className="h-3.5 w-3.5" />
                  Recent Activity
                </Label>
                <div className="space-y-2 max-h-52 overflow-y-auto scroll-container">
                  {history.slice(0, 5).map((entry) => (
                    <div
                      key={entry.id}
                      className="flex items-center justify-between p-3 rounded-xl bg-muted/50 border min-h-[52px]"
                    >
                      <div className="flex items-center gap-2.5 min-w-0">
                        {entry.type === 'mint' || entry.type === 'receive' ? (
                          <ArrowDownCircle className="h-5 w-5 text-green-500 flex-shrink-0" />
                        ) : (
                          <ArrowUpCircle className="h-5 w-5 text-red-500 flex-shrink-0" />
                        )}
                        <div className="min-w-0">
                          <div className="text-sm font-semibold leading-tight">
                            {entry.type === 'mint' && 'Received ⚡ Lightning'}
                            {entry.type === 'melt' && 'Sent ⚡ Lightning'}
                            {entry.type === 'send' && 'Sent 🥜 Token'}
                            {entry.type === 'receive' && 'Received 🥜 Token'}
                          </div>
                          <div className="text-xs text-muted-foreground">
                            {new Date(entry.timestamp).toLocaleDateString()}
                          </div>
                        </div>
                      </div>
                      <div className="text-right flex-shrink-0 ml-2">
                        <div className={`text-sm font-mono font-bold ${entry.type === 'mint' || entry.type === 'receive' ? 'text-green-400' : 'text-red-400'}`}>
                          {entry.type === 'mint' || entry.type === 'receive' ? '+' : '-'}
                          {entry.amount.toLocaleString()}
                        </div>
                        <div className="text-xs text-muted-foreground">sats</div>
                      </div>
                    </div>
                  ))}
                </div>
              </div>
            )}
          </CardContent>
        </Card>

        {/* What is Cashu Info Card */}
        <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 is Cashu?
            </CardTitle>
          </CardHeader>
          <CardContent className="px-4 pb-4 space-y-3">
            <p className="text-muted-foreground text-sm leading-relaxed">
              Cashu is digital cash backed by Bitcoin Lightning. Think of it as Bitcoin tokens you hold in your browser.
            </p>
            <div className="grid grid-cols-1 sm:grid-cols-2 gap-2 text-sm">
              {[
                'Works offline at skate spots',
                'Instant peer-to-peer payments',
                "Privacy-focused (mints can't track you)",
                'Always redeemable for Lightning sats',
              ].map((item) => (
                <div key={item} className="flex items-start gap-2 p-2.5 bg-muted/40 rounded-lg">
                  <span className="text-green-500 flex-shrink-0 mt-0.5">✅</span>
                  <span className="text-muted-foreground text-xs leading-snug">{item}</span>
                </div>
              ))}
            </div>
            <a
              href="https://mintradar.pedani.eu/"
              target="_blank"
              rel="noopener noreferrer"
              className="inline-flex items-center gap-2 text-sm text-primary hover:underline font-medium"
            >
              <ExternalLink className="h-4 w-4" />
              Find mints at mintradar.pedani.eu
            </a>
          </CardContent>
        </Card>

        {/* Mint Privacy Management */}
        <MintPrivacyManager
          mints={mints}
          balances={balances}
          activeMintUrl={activeMintUrl}
          onSetActiveMint={setActiveMintUrl}
          onAddMint={handleAddMint}
          onRemoveMint={handleRemoveMintDirect}
          totalBalance={totalBalance}
        />
      </div>

      {/* Backup Warning */}
      {mnemonic && (
        <Card className="border-amber-500/50 bg-amber-500/5">
          <CardHeader className="px-4 pt-4 pb-3">
            <CardTitle className="flex items-center gap-2 text-amber-600 text-base">
              <Shield className="h-5 w-5" />
              Backup Your Wallet
            </CardTitle>
          </CardHeader>
          <CardContent className="px-4 pb-4 space-y-3">
            <p className="text-muted-foreground text-sm leading-relaxed">
              Your wallet is secured with a 12-word recovery phrase. Save it safely — you'll need it to restore your balance if you clear browser data.
            </p>
            <Button
              onClick={() => setShowRecoveryPhrase(true)}
              variant="outline"
              className="w-full h-11 border-amber-500/50 text-amber-600 hover:bg-amber-500/10 font-bold"
            >
              View Recovery Phrase
            </Button>
            <p className="text-xs text-muted-foreground italic">
              This is like your Nostr nsec — keep it secret and backed up!
            </p>
          </CardContent>
        </Card>
      )}

      {/* Invoice Modal */}
      <Dialog open={showInvoiceModal} onOpenChange={setShowInvoiceModal}>
        <DialogContent className="w-[calc(100%-1rem)] sm:max-w-md p-4 sm:p-6">
          <DialogHeader>
            <DialogTitle className="text-base sm:text-lg">Receive {currentInvoice?.amount} sats</DialogTitle>
            <DialogDescription className="text-xs sm:text-sm">
              Pay this invoice from any Lightning wallet
            </DialogDescription>
          </DialogHeader>
          {currentInvoice && (
            <div className="space-y-3 sm:space-y-4">
              <div className="flex justify-center p-2 sm:p-4 bg-white rounded-lg">
                <img src={currentInvoice.qrCodeUrl} alt="Invoice QR Code" className="max-w-full max-h-[40vh] h-auto object-contain" />
              </div>
              <div className="space-y-2">
                <Label className="text-xs text-muted-foreground">Lightning Invoice</Label>
                <div className="flex gap-2">
                  <Input
                    value={currentInvoice.invoice}
                    readOnly
                    className="font-mono text-[10px] sm:text-xs"
                  />
                  <Button
                    size="sm"
                    variant="outline"
                    onClick={() => copyToClipboard(currentInvoice.invoice, 'Invoice')}
                  >
                    <Copy className="h-4 w-4" />
                  </Button>
                </div>
              </div>
              <p className="text-xs sm:text-sm text-amber-600">
                ⏳ Waiting for payment...
              </p>
            </div>
          )}
        </DialogContent>
      </Dialog>

      {/* Send Token Modal */}
      <Dialog open={!!sentToken} onOpenChange={(open) => !open && setSentToken(null)}>
        <DialogContent className="w-[calc(100%-1rem)] sm:max-w-md p-4 sm:p-6">
          <DialogHeader>
            <DialogTitle className="text-base sm:text-lg">Token Ready to Send</DialogTitle>
            <DialogDescription className="text-xs sm:text-sm">
              Share this token with the recipient
            </DialogDescription>
          </DialogHeader>
          {sentToken && (
            <div className="space-y-3 sm:space-y-4">
              {sentTokenQRCode && (
                <div className="flex justify-center p-2 sm:p-4 bg-white rounded-lg">
                  <img src={sentTokenQRCode} alt="Token QR Code" className="max-w-full max-h-[40vh] h-auto object-contain" />
                </div>
              )}
              <div className="space-y-2">
                <Label className="text-xs text-muted-foreground">Cashu Token</Label>
                <div className="space-y-2">
                  <Input
                    value={sentToken}
                    readOnly
                    className="font-mono text-[10px] sm:text-xs"
                  />
                  <div className="flex gap-2">
                    <Button
                      size="sm"
                      variant="outline"
                      onClick={() => copyToClipboard(sentToken, 'Token')}
                      className="flex-1"
                    >
                      <Copy className="h-4 w-4 mr-2" />
                      Copy Token
                    </Button>
                  </div>
                </div>
              </div>
              <Alert className="border-amber-500/50 bg-amber-500/5">
                <AlertCircle className="h-4 w-4 text-amber-600" />
                <AlertDescription className="text-xs sm:text-sm">
                  Anyone with this token can claim it - treat it like cash!
                </AlertDescription>
              </Alert>
            </div>
          )}
        </DialogContent>
      </Dialog>

      {/* Recovery Phrase Dialog — replaces the old raw alert() with an elegant,
          hidden-by-default reveal */}
      {mnemonic && (
        <RecoveryPhraseDialog
          open={showRecoveryPhrase}
          onOpenChange={setShowRecoveryPhrase}
          mnemonic={mnemonic}
        />
      )}

      {/* QR Scanner Modal */}
      <QRScannerModal
        isOpen={showQRScanner}
        onClose={() => setShowQRScanner(false)}
        onResult={handleQRScanResult}
      />
    </>
  );
}