'use client';

import { useState } from 'react';
import Link from 'next/link';
import Navbar from '@/components/Navbar';
import Footer from '@/components/Footer';

// ─── Stripe Payment Links ───────────────────────────────────────────
// These are pre-generated checkout URLs from the Stripe Dashboard.
// Sami needs to provide his Stripe secret key so we can create these
// programmatically, or create them manually in the Stripe Dashboard.
// The product catalog (from src/billing/catalog.js):
//   pro-30d  → $20,  30-day license  (one-time payment)
//   pro-90d  → $50,  90-day license  (one-time payment)
//   pro-180d → $70, 180-day license  (one-time payment)
//   pro-365d → $99, 365-day license  (one-time payment)
// ─────────────────────────────────────────────────────────────────────
const STRIPE_LINKS: Record<string, string> = {
  '30d':    'https://buy.stripe.com/7sY9AVgJm35P6Uo5j904800',
  '90d':    'https://buy.stripe.com/bJe6oJ0Ko7m5emQ4f504801',
  '180d':   'https://buy.stripe.com/4gMeVfct635P2E826X04802',
  '365d':   'https://buy.stripe.com/8x228tct65dXdiM9zp04803',
};

export default function PricingPage() {
  const [selectedPlan, setSelectedPlan] = useState<'30d' | '90d' | '180d' | '365d'>('365d');

  const planOptions = [
    { key: '30d',  label: '30 Days',   price: 20, productId: 'pro-30d',  perDay: '$0.67/day' },
    { key: '90d',  label: '90 Days',   price: 50, productId: 'pro-90d',  perDay: '$0.56/day' },
    { key: '180d', label: '180 Days',  price: 70, productId: 'pro-180d', perDay: '$0.39/day' },
    { key: '365d', label: '365 Days',  price: 99, productId: 'pro-365d', perDay: '$0.27/day' },
  ] as const;

  const selected = planOptions.find(p => p.key === selectedPlan)!;

  const coreFeatures = [
    'Dashboard & real-time service monitoring',
    '76+ pre-configured app templates',
    'Automatic SSL via Caddy internal CA',
    'DNS automation via Technitium DNS',
    'Reverse proxy management + Caddyfile-as-Code',
    'AI Intent Router — natural language commands',
    'MCP Server — AI assistant integration',
    'Security Center — unified event pipeline',
    'Service Discovery — auto-detect containers',
    'Smart Defaults Wizard — guided setup',
    'WebSocket real-time dashboard updates',
    'TOTP 2FA + multi-user admin & invites',
    'Audit logging & encrypted credential vault',
    'One-click backup & disaster recovery',
    'Plugin/extension system',
    'JavaScript SDK + TypeScript types (39 methods)',
    'Prometheus metrics export',
    'i18n — 5 languages (EN/ES/FR/DE/AR)',
  ];

  const premiumFeatures = [
    'Everything in Core, plus:',
    'Auto-Login SSO for deployed apps',
    'Recipes — multi-container stack deployment',
    'Swarm — Docker Swarm multi-node orchestration',
    'Multi-Host Fleet Management — remote instance control',
    'Priority support',
    'One active machine per license',
    '7-day grace period on expiry',
    'One-time payment — no recurring billing',
  ];

  const faqs = [
    {
      question: 'How does the license work?',
      answer: 'You pay once and receive a license code valid for the selected duration (30, 90, 180, or 365 days). Paste it into your DashCaddy dashboard under Admin → License to unlock all premium features. No recurring billing — when it expires, you simply purchase again if you want to continue.',
    },
    {
      question: 'What happens when my license expires?',
      answer: 'Premium features gracefully deactivate after a 7-day grace period. Your services keep running — only the premium-gated features (SSO, Recipes, Swarm, Fleet Management) become unavailable. Purchase a new license at any time to re-enable them.',
    },
    {
      question: 'Can I use DashCaddy without Premium?',
      answer: 'Absolutely. The core platform is fully functional without a license — including AI commands, the Security Center, service discovery, monitoring, backup, and all 76+ app templates. Premium unlocks SSO, Recipes, Swarm orchestration, and Fleet Management for advanced multi-node setups.',
    },
    {
      question: 'How many machines can I activate?',
      answer: 'One active machine at a time per license. You can deactivate and move to a new machine when needed.',
    },
    {
      question: 'Is my data safe?',
      answer: 'DashCaddy runs entirely on your infrastructure. Your data never leaves your server. We have no access to your applications, configurations, or data.',
    },
    {
      question: 'What payment methods do you accept?',
      answer: 'We use Stripe for secure payment processing. All major credit cards are accepted. Payments are processed through Stripe\'s encrypted checkout — we never see or store your card details.',
    },
  ];

  const [expandedFaq, setExpandedFaq] = useState<number | null>(0);

  return (
    <div className="flex flex-col min-h-screen bg-surface-950 text-surface-50">
      <Navbar />

      {/* Hero */}
      <section className="relative py-16 sm:py-20 lg:py-24">
        <div className="absolute inset-0 -z-10">
          <div className="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 w-96 h-96 bg-brand-500/20 rounded-full blur-3xl opacity-30 animate-pulse" />
        </div>
        <div className="mx-auto max-w-4xl px-4 sm:px-6 lg:px-8 text-center">
          <h1 className="text-4xl sm:text-5xl lg:text-6xl font-bold mb-6">
            Simple, Transparent <span className="text-brand-400">Pricing</span>
          </h1>
          <p className="text-xl text-surface-300 mb-8 max-w-2xl mx-auto">
            The core platform is completely free — including AI commands, Security Center, and all 76+ app templates. Premium unlocks advanced orchestration with a one-time payment.
          </p>
        </div>
      </section>

      {/* Two-column: Core vs Premium */}
      <section className="relative py-12 sm:py-16 lg:py-20">
        <div className="mx-auto max-w-6xl px-4 sm:px-6 lg:px-8">
          <div className="grid grid-cols-1 md:grid-cols-2 gap-8">

            {/* Core Plan */}
            <div className="relative rounded-2xl border border-surface-700/50 bg-surface-800/50 hover:border-surface-700 hover:bg-surface-800/80 transition-all">
              <div className="p-8 sm:p-10">
                <div className="mb-8">
                  <h3 className="text-2xl font-bold text-surface-50 mb-2">Core</h3>
                  <p className="text-surface-400 text-sm mb-6">Everything you need to deploy, manage, and secure self-hosted services — with AI built in.</p>
                  <div className="flex items-baseline gap-2">
                    <span className="text-5xl font-bold text-surface-50">Free</span>
                  </div>
                  <p className="text-surface-500 text-sm mt-2">No license required, no credit card</p>
                </div>

                <Link
                  href="/docs/installation"
                  className="block w-full rounded-lg border border-surface-700 bg-surface-700/50 px-6 py-3 text-center font-semibold text-surface-50 hover:border-brand-400 hover:bg-surface-700 hover:text-brand-400 transition-all"
                >
                  Read Install Guide
                </Link>

                <div className="border-t border-surface-700/50 pt-8 mt-8">
                  <p className="text-xs font-semibold uppercase tracking-wide text-surface-500 mb-4">Everything included — no limits</p>
                  <ul className="space-y-3">
                    {coreFeatures.map((feature, i) => (
                      <li key={i} className="flex items-start gap-3">
                        <svg className="h-5 w-5 flex-shrink-0 text-green-400 mt-0.5" fill="currentColor" viewBox="0 0 20 20">
                          <path fillRule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clipRule="evenodd" />
                        </svg>
                        <span className="text-surface-300 text-sm">{feature}</span>
                      </li>
                    ))}
                  </ul>
                </div>
              </div>
            </div>

            {/* Premium Plan */}
            <div className="relative rounded-2xl border border-brand-500/50 bg-gradient-to-br from-surface-800 to-surface-900 shadow-2xl shadow-brand-500/20">
              <div className="absolute -top-4 left-1/2 -translate-x-1/2">
                <span className="inline-block rounded-full bg-brand-500 px-4 py-1 text-xs font-bold uppercase tracking-wide text-white">
                  Premium
                </span>
              </div>

              <div className="p-8 sm:p-10">
                <div className="mb-8">
                  <h3 className="text-2xl font-bold text-surface-50 mb-2">Premium</h3>
                  <p className="text-surface-400 text-sm mb-6">Advanced orchestration, SSO, and fleet management. One-time payment — no subscription.</p>

                  {/* Plan selector */}
                  <div className="mb-4">
                    <div className="grid grid-cols-2 gap-2">
                      {planOptions.map((opt) => (
                        <button
                          key={opt.key}
                          onClick={() => setSelectedPlan(opt.key)}
                          className={`rounded-lg px-3 py-2 text-sm font-medium transition-all ${
                            selectedPlan === opt.key
                              ? 'bg-brand-500 text-white'
                              : 'bg-surface-700/50 text-surface-400 hover:bg-surface-700 hover:text-surface-300'
                          }`}
                        >
                          {opt.label}
                        </button>
                      ))}
                    </div>
                  </div>

                  <div className="flex items-baseline gap-2">
                    <span className="text-5xl font-bold text-surface-50">${selected.price}</span>
                    <span className="text-surface-400 text-lg">one-time</span>
                  </div>
                  <p className="text-brand-400 text-sm font-semibold mt-1">{selected.perDay} · {selected.productId}</p>
                </div>

                {/* Subscribe button — Stripe Payment Link */}
                <a
                  href={STRIPE_LINKS[selectedPlan]}
                  target="_blank"
                  rel="noopener noreferrer"
                  className="block w-full rounded-lg bg-brand-500 px-6 py-3 text-center font-semibold text-white hover:bg-brand-600 hover:shadow-lg hover:shadow-brand-500/30 transition-all"
                >
                  Buy Premium License
                </a>
                <p className="text-center text-xs text-surface-500 mt-2">
                  🔒 Secure checkout via Stripe · One-time payment
                </p>

                <div className="border-t border-surface-700/50 pt-8 mt-8">
                  <p className="text-xs font-semibold uppercase tracking-wide text-surface-500 mb-4">Everything in Core, plus</p>
                  <ul className="space-y-3">
                    {premiumFeatures.map((feature, i) => (
                      <li key={i} className="flex items-start gap-3">
                        {feature.startsWith('Everything') ? (
                          <span className="text-sm font-semibold text-surface-300">{feature}</span>
                        ) : (
                          <>
                            <svg className="h-5 w-5 flex-shrink-0 text-brand-400 mt-0.5" fill="currentColor" viewBox="0 0 20 20">
                              <path fillRule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clipRule="evenodd" />
                            </svg>
                            <span className="text-surface-300 text-sm">{feature}</span>
                          </>
                        )}
                      </li>
                    ))}
                  </ul>
                </div>
              </div>
            </div>

          </div>
        </div>
      </section>

      {/* FAQ */}
      <section className="relative py-16 sm:py-20 lg:py-24 bg-gradient-to-b from-surface-950 to-surface-900">
        <div className="mx-auto max-w-3xl px-4 sm:px-6 lg:px-8">
          <div className="mb-12 text-center">
            <h2 className="text-3xl sm:text-4xl lg:text-5xl font-bold mb-4">
              Frequently Asked <span className="text-brand-400">Questions</span>
            </h2>
          </div>
          <div className="space-y-4">
            {faqs.map((faq, idx) => (
              <div
                key={idx}
                className="rounded-lg border border-surface-700/50 bg-surface-800/50 overflow-hidden transition-all hover:border-surface-700"
              >
                <button
                  onClick={() => setExpandedFaq(expandedFaq === idx ? null : idx)}
                  className="w-full px-6 py-4 flex items-center justify-between hover:bg-surface-800/70 transition-colors"
                >
                  <h3 className="text-lg font-semibold text-surface-50 text-left">{faq.question}</h3>
                  <svg
                    className={`h-6 w-6 flex-shrink-0 text-brand-400 transition-transform ${expandedFaq === idx ? 'rotate-180' : ''}`}
                    fill="none" viewBox="0 0 24 24" strokeWidth={2} stroke="currentColor"
                  >
                    <path strokeLinecap="round" strokeLinejoin="round" d="M19.5 8.25l-7.5 7.5-7.5-7.5" />
                  </svg>
                </button>
                {expandedFaq === idx && (
                  <div className="border-t border-surface-700/50 bg-surface-900/50 px-6 py-4">
                    <p className="text-surface-300 leading-relaxed">{faq.answer}</p>
                  </div>
                )}
              </div>
            ))}
          </div>
        </div>
      </section>

      {/* CTA */}
      <section className="relative py-16 sm:py-20 lg:py-24 bg-surface-950">
        <div className="mx-auto max-w-4xl px-4 sm:px-6 lg:px-8 text-center">
          <h2 className="text-3xl sm:text-4xl font-bold mb-6">Ready to Get Started?</h2>
          <p className="text-xl text-surface-300 mb-8 max-w-2xl mx-auto">
            Install DashCaddy and start deploying services in minutes. The core platform is free forever.
          </p>
          <div className="flex flex-col sm:flex-row gap-4 justify-center">
            <Link
              href="/docs/installation"
              className="inline-flex items-center justify-center gap-2 rounded-lg bg-brand-500 px-8 py-3 text-base font-semibold text-white hover:bg-brand-600 transition-all hover:shadow-lg hover:shadow-brand-500/30"
            >
              Installation Guide
            </Link>
            <Link
              href="/"
              className="inline-flex items-center justify-center gap-2 rounded-lg border border-surface-700 bg-surface-800/50 px-8 py-3 text-base font-semibold text-surface-50 hover:border-brand-400 hover:bg-surface-800 transition-colors"
            >
              Back to Home
            </Link>
          </div>
        </div>
      </section>

      <Footer />
    </div>
  );
}
