import React from 'react';
import type { Metadata } from 'next';
import CryptoGenerator from './CryptoGenerator';
import { Bitcoin, Shield, Zap, Smartphone, Wallet, Coins, Sparkles, Download, Share2 } from 'lucide-react';
import { QRCodeSVG } from 'qrcode.react';
import { ToolBreadcrumb } from '@/components/seo/BreadcrumbSchema';
import { RelatedTools } from '@/components/marketing/RelatedTools';
import { generateSoftwareAppSchema, generateFaqSchema } from '@/lib/schema-utils';

// SEO Optimized Metadata
export const metadata: Metadata = {
    title: {
        absolute: 'Free Crypto QR Code Generator | Krypto QR Code Erstellen | QR Master',
    },
    description: 'Create a QR code for your Crypto wallet address. Erstelle Bitcoin & Ethereum QR Codes für einfache Zahlungen. Supports BTC, ETH, USDT & more.',
    keywords: ['crypto qr code', 'bitcoin qr generator', 'ethereum qr code', 'crypto wallet qr', 'donation qr code', 'krypto qr code', 'bitcoin qr code erstellen', 'kryptowährung qr code', 'wallet adresse qr code'],
    alternates: {
        canonical: 'https://www.qrmaster.net/tools/crypto-qr-code',
    },
    openGraph: {
        title: 'Free Crypto QR Code Generator | QR Master',
        description: 'Generate QR codes to accept Crypto payments securely. Supports BTC, ETH, SOL.',
        type: 'website',
        url: 'https://www.qrmaster.net/tools/crypto-qr-code',
        images: [{ url: '/og-crypto-generator.png', width: 1200, height: 630 }],
    },
    twitter: {
        card: 'summary_large_image',
        title: 'Free Crypto QR Code Generator',
        description: 'Create secure QR codes for your crypto wallet.',
    },
    robots: {
        index: true,
        follow: true,
    },
};

// JSON-LD Structured Data
const jsonLd = {
    '@context': 'https://schema.org',
    '@graph': [
        generateSoftwareAppSchema(
            'Crypto QR Code Generator',
            'Generate QR codes that contain your cryptocurrency wallet address for easy payments.',
            '/og-crypto-generator.png',
            'FinanceApplication'
        ),
        {
            '@type': 'HowTo',
            name: 'How to Create a Crypto QR Code',
            description: 'Create a QR code for your Bitcoin or Ethereum wallet.',
            step: [
                {
                    '@type': 'HowToStep',
                    position: 1,
                    name: 'Select Currency',
                    text: 'Choose your cryptocurrency from the list (Bitcoin, Ethereum, USDT, etc.).',
                },
                {
                    '@type': 'HowToStep',
                    position: 2,
                    name: 'Enter Address',
                    text: 'Copy your public wallet address from your crypto app and paste it into the "Wallet Address" field.',
                },
                {
                    '@type': 'HowToStep',
                    position: 3,
                    name: 'Add Amount (Optional)',
                    text: 'If you are requesting a specific payment, enter the amount to pre-fill the transaction.',
                },
                {
                    '@type': 'HowToStep',
                    position: 4,
                    name: 'Customize QR',
                    text: 'Select a brand color (like Bitcoin Orange or Ethereum Blue) and add a frame like "Pay Now".',
                },
                {
                    '@type': 'HowToStep',
                    position: 5,
                    name: 'Download',
                    text: 'Download the QR code image and share it to receive funds securely.',
                },
            ],
            totalTime: 'PT30S',
        },
        generateFaqSchema({
            'Is it safe to share my wallet address?': {
                question: 'Is it safe to share my wallet address?',
                answer: 'Yes. Your public wallet address is designed to be shared so you can receive funds. Never share your private key.',
            },
            'Which currencies are supported?': {
                question: 'Which currencies are supported?',
                answer: 'Our generator supports standard URI schemes for Bitcoin, Ethereum, Solana, and can generally store any wallet string for other coins.',
            },
            'Can I add a specific amount?': {
                question: 'Can I add a specific amount?',
                answer: 'Yes, you can pre-fill an amount so when the user scans, their wallet app automatically suggests the correct payment value.',
            },
            'Does it work with all wallets?': {
                question: 'Does it work with all wallets?',
                answer: 'Yes, standard crypto QR codes are universally readable by almost all modern wallet apps (Coinbase, MetaMask, Trust Wallet, etc.).',
            },
            'Are there any fees?': {
                question: 'Are there any fees?',
                answer: 'No. This generator is completely free. We do not charge any fees for generating codes or for the transactions made using them.',
            },
        }),
    ],
};

export default function CryptoQRCodePage() {
    return (
        <>
            <script
                type="application/ld+json"
                dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }}
            />
            <ToolBreadcrumb toolName="Crypto QR Code Generator" toolSlug="crypto-qr-code" />

            <div className="min-h-screen" style={{ backgroundColor: '#EBEBDF' }}>

                {/* HERO SECTION */}
                <section className="relative pt-20 pb-20 lg:pt-32 lg:pb-32 px-4 sm:px-6 lg:px-8 overflow-hidden bg-slate-900">
                    <div className="absolute inset-0 opacity-20">
                        {/* Circuit Pattern */}
                        <svg className="w-full h-full" width="100%" height="100%" xmlns="http://www.w3.org/2000/svg">
                            <defs>
                                <pattern id="circuit_pattern" width="100" height="100" patternUnits="userSpaceOnUse">
                                    <path d="M10 10 H 90 V 90 H 10 Z" stroke="none" fill="none" />
                                    <circle cx="20" cy="20" r="2" fill="#F7931A" />
                                    <circle cx="80" cy="80" r="2" fill="#627EEA" />
                                    <path d="M20 20 L 50 20 L 50 50" stroke="white" strokeWidth="1" strokeOpacity="0.1" />
                                </pattern>
                            </defs>
                            <rect width="100%" height="100%" fill="url(#circuit_pattern)" />
                        </svg>
                    </div>

                    <div className="max-w-7xl mx-auto grid lg:grid-cols-2 gap-12 items-center relative z-10">
                        <div className="text-center lg:text-left">
                            <div className="inline-flex items-center gap-2 px-3 py-1 rounded-full bg-white/10 text-white/90 text-sm font-medium mb-6 backdrop-blur-sm border border-white/10 hover:bg-white/20 transition-colors cursor-default">
                                <span className="flex h-2 w-2 relative">
                                    <span className="animate-ping absolute inline-flex h-full w-full rounded-full bg-orange-400 opacity-75"></span>
                                    <span className="relative inline-flex rounded-full h-2 w-2 bg-orange-400"></span>
                                </span>
                                Free Tool — Secure & Private
                            </div>

                            <h1 className="text-4xl md:text-5xl lg:text-6xl font-extrabold text-white tracking-tight leading-tight mb-6">
                                Accept Payments with <br className="hidden lg:block" />
                                <span className="text-transparent bg-clip-text bg-gradient-to-r from-[#F7931A] to-[#F2A900]">Crypto QR Codes</span>
                            </h1>

                            <p className="text-lg md:text-xl text-slate-400 max-w-2xl mx-auto lg:mx-0 mb-8 leading-relaxed">
                                Share your wallet address securely. Supports Bitcoin, Ethereum, USDT, and more.
                                <strong className="text-white block sm:inline mt-2 sm:mt-0"> Error-free transfers.</strong>
                            </p>

                            <div className="flex flex-wrap justify-center lg:justify-start gap-4 text-sm font-medium text-white/80">
                                <div className="flex items-center gap-2 bg-white/5 px-4 py-2.5 rounded-xl border border-white/10 backdrop-blur-sm">
                                    <Bitcoin className="w-4 h-4 text-[#F7931A]" />
                                    Bitcoin
                                </div>
                                <div className="flex items-center gap-2 bg-white/5 px-4 py-2.5 rounded-xl border border-white/10 backdrop-blur-sm">
                                    <Coins className="w-4 h-4 text-[#627EEA]" />
                                    Ethereum & Altcoins
                                </div>
                                <div className="flex items-center gap-2 bg-white/5 px-4 py-2.5 rounded-xl border border-white/10 backdrop-blur-sm">
                                    <Wallet className="w-4 h-4 text-white" />
                                    Wallet Connect
                                </div>
                            </div>
                        </div>

                        {/* Visual Abstract */}
                        <div className="hidden lg:flex relative items-center justify-center min-h-[400px]">
                            <div className="absolute w-[500px] h-[500px] bg-orange-500/10 rounded-full blur-[100px] -top-20 -right-20 animate-pulse" />

                            <div className="relative w-80 h-96 bg-white/5 backdrop-blur-xl border border-white/20 rounded-3xl shadow-2xl flex flex-col items-center justify-center p-8 transform rotate-2 hover:-rotate-1 transition-all duration-700 group">
                                <div className="absolute inset-0 bg-gradient-to-br from-white/5 to-transparent rounded-3xl" />

                                <div className="w-full bg-gradient-to-br from-orange-400 to-orange-600 rounded-xl shadow-lg p-5 mb-6 relative overflow-hidden text-white">
                                    <div className="flex justify-between items-start mb-4">
                                        <Bitcoin className="w-8 h-8 opacity-80" />
                                        <div className="bg-white/20 px-2 py-1 rounded text-xs">BTC</div>
                                    </div>
                                    <div className="text-2xl font-bold tracking-wider mb-1">0.05 BTC</div>
                                    <div className="text-xs opacity-70">$3,450.25 USD</div>
                                </div>

                                <div className="w-48 h-48 bg-white rounded-xl p-2 shadow-inner relative overflow-hidden flex items-center justify-center">
                                    <QRCodeSVG value="https://www.qrmaster.net" size={170} fgColor="#333" level="Q" />
                                </div>

                                {/* Floating Badge */}
                                <div className="absolute -bottom-6 -right-6 bg-slate-900 border border-white/10 py-3 px-5 rounded-xl shadow-xl flex items-center gap-3 transform transition-transform hover:scale-105 duration-300">
                                    <div className="bg-orange-500/20 p-2 rounded-full">
                                        <Wallet className="w-5 h-5 text-orange-500" />
                                    </div>
                                    <div className="text-left">
                                        <div className="text-[10px] text-slate-400 font-bold uppercase tracking-wider">Payment</div>
                                        <div className="text-sm font-bold text-white">Receive Crypto</div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </section>

                {/* GENERATOR SECTION */}
                <section className="py-12 px-4 sm:px-6 lg:px-8 -mt-8">
                    <CryptoGenerator />
                </section>

                {/* HOW IT WORKS */}
                <section className="py-16 px-4 sm:px-6 lg:px-8 bg-white">
                    <div className="max-w-4xl mx-auto">
                        <h2 className="text-3xl font-bold text-slate-900 text-center mb-12">
                            How Crypto QR Codes Work
                        </h2>

                        <div className="grid md:grid-cols-3 lg:grid-cols-5 gap-8">
                            <article className="text-center">
                                <div className="w-12 h-12 rounded-2xl bg-black flex items-center justify-center mx-auto mb-4">
                                    <Coins className="w-6 h-6 text-white" />
                                </div>
                                <h3 className="font-bold text-slate-900 mb-2">1. Select</h3>
                                <p className="text-slate-600 text-xs leading-relaxed">
                                    Choose your crypto currency (BTC, ETH, etc.).
                                </p>
                            </article>

                            <article className="text-center">
                                <div className="w-12 h-12 rounded-2xl bg-black flex items-center justify-center mx-auto mb-4">
                                    <Wallet className="w-6 h-6 text-white" />
                                </div>
                                <h3 className="font-bold text-slate-900 mb-2">2. Paste</h3>
                                <p className="text-slate-600 text-xs leading-relaxed">
                                    Enter your public wallet address.
                                </p>
                            </article>

                            <article className="text-center">
                                <div className="w-12 h-12 rounded-2xl bg-black flex items-center justify-center mx-auto mb-4">
                                    <Zap className="w-6 h-6 text-white" />
                                </div>
                                <h3 className="font-bold text-slate-900 mb-2">3. Amount</h3>
                                <p className="text-slate-600 text-xs leading-relaxed">
                                    Optionally specify an amount to request.
                                </p>
                            </article>

                            <article className="text-center">
                                <div className="w-12 h-12 rounded-2xl bg-black flex items-center justify-center mx-auto mb-4">
                                    <Sparkles className="w-6 h-6 text-white" />
                                </div>
                                <h3 className="font-bold text-slate-900 mb-2">4. Style</h3>
                                <p className="text-slate-600 text-xs leading-relaxed">
                                    Customize colors and add a 'Pay' frame.
                                </p>
                            </article>

                            <article className="text-center">
                                <div className="w-12 h-12 rounded-2xl bg-black flex items-center justify-center mx-auto mb-4">
                                    <Download className="w-6 h-6 text-white" />
                                </div>
                                <h3 className="font-bold text-slate-900 mb-2">5. Download</h3>
                                <p className="text-slate-600 text-xs leading-relaxed">
                                    Save your secure QR code image.
                                </p>
                            </article>
                        </div>
                    </div>
                </section>

                {/* RELATED TOOLS */}
                <RelatedTools />

                {/* FAQ SECTION */}
                <section className="py-16 px-4 sm:px-6 lg:px-8" style={{ backgroundColor: '#EBEBDF' }}>
                    <div className="max-w-3xl mx-auto">
                        <h2 className="text-3xl font-bold text-slate-900 text-center mb-4">
                            Frequently Asked Questions
                        </h2>
                        <p className="text-slate-600 text-center mb-10">
                            Common questions about Crypto QR codes.
                        </p>

                        <div className="space-y-4">
                            <FaqItem
                                question="Is it safe to share my wallet address?"
                                answer="Yes. Your public wallet address is designed to be shared so you can receive funds. Never share your private key."
                            />
                            <FaqItem
                                question="Which currencies are supported?"
                                answer="Our generator supports standard URI schemes for Bitcoin, Ethereum, Solana, and can generally store any wallet string for other coins."
                            />
                            <FaqItem
                                question="Can I add a specific amount?"
                                answer="Yes, you can pre-fill an amount so when the user scans, their wallet app automatically suggests the correct payment value."
                            />
                            <FaqItem
                                question="Does it work with all wallets?"
                                answer="Yes, standard crypto QR codes are universally readable by almost all modern wallet apps (Coinbase, MetaMask, Trust Wallet, etc.)."
                            />
                            <FaqItem
                                question="Are there any fees?"
                                answer="No. This generator is completely free. We do not charge any fees for generating codes or for the transactions made using them."
                            />
                        </div>
                    </div>
                </section>

            </div>
        </>
    );
}

function FaqItem({ question, answer }: { question: string; answer: string }) {
    return (
        <details className="group bg-white rounded-xl shadow-sm border border-slate-200 overflow-hidden">
            <summary className="flex items-center justify-between p-5 cursor-pointer list-none text-slate-900 font-semibold hover:bg-slate-50 transition-colors">
                {question}
                <span className="transition group-open:rotate-180 text-slate-400">
                    <svg fill="none" height="20" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" viewBox="0 0 24 24" width="20">
                        <path d="M6 9l6 6 6-6" />
                    </svg>
                </span>
            </summary>
            <div className="text-slate-600 px-5 pb-5 pt-0 leading-relaxed text-sm">
                {answer}
            </div>
        </details>
    );
}