'use client'

import React, { useState } from 'react'
import { SDKDocsSidebar } from '@/components/SDKDocsSidebar'
import { Copy, Check, Apple } from 'lucide-react'

function CopyButton({ text }: { text: string }) {
  const [copied, setCopied] = useState(false)
  const handleCopy = async () => {
    await navigator.clipboard.writeText(text)
    setCopied(true)
    setTimeout(() => setCopied(false), 2000)
  }
  return (
    <button onClick={handleCopy} className="p-2 hover:bg-gray-700 rounded transition-colors">
      {copied ? <Check className="w-4 h-4 text-green-400" /> : <Copy className="w-4 h-4 text-gray-400" />}
    </button>
  )
}

function CodeBlock({ code, filename }: { code: string; filename?: string }) {
  return (
    <div className="bg-gray-900 rounded-lg overflow-hidden">
      {filename && (
        <div className="px-4 py-2 bg-gray-800 text-gray-400 text-xs border-b border-gray-700">
          {filename}
        </div>
      )}
      <div className="relative">
        <div className="absolute top-2 right-2">
          <CopyButton text={code} />
        </div>
        <pre className="p-4 text-sm text-gray-300 font-mono overflow-x-auto">
          <code>{code}</code>
        </pre>
      </div>
    </div>
  )
}

export default function iOSSDKPage() {
  return (
    <div className="min-h-screen bg-gray-50 flex">
      <SDKDocsSidebar />

      <main className="flex-1 ml-64">
        <div className="max-w-4xl mx-auto px-8 py-12">
          <div className="flex items-center gap-3 mb-2">
            <div className="w-10 h-10 rounded-lg bg-gray-900 flex items-center justify-center">
              <Apple className="w-6 h-6 text-white" />
            </div>
            <h1 className="text-3xl font-bold text-gray-900">iOS SDK (Swift)</h1>
          </div>
          <p className="text-lg text-gray-600 mb-8">
            Native Swift SDK fuer iOS 15+ und iPadOS mit SwiftUI-Unterstuetzung.
          </p>

          {/* Requirements */}
          <section className="mb-12">
            <h2 className="text-xl font-semibold text-gray-900 mb-4">Systemvoraussetzungen</h2>
            <div className="bg-white rounded-xl border border-gray-200 overflow-hidden">
              <table className="min-w-full divide-y divide-gray-200">
                <tbody className="divide-y divide-gray-200">
                  <tr>
                    <td className="px-6 py-4 text-sm font-medium text-gray-900">Swift Version</td>
                    <td className="px-6 py-4 text-sm text-gray-600">5.9+</td>
                  </tr>
                  <tr>
                    <td className="px-6 py-4 text-sm font-medium text-gray-900">iOS Deployment Target</td>
                    <td className="px-6 py-4 text-sm text-gray-600">iOS 15.0+</td>
                  </tr>
                  <tr>
                    <td className="px-6 py-4 text-sm font-medium text-gray-900">Xcode Version</td>
                    <td className="px-6 py-4 text-sm text-gray-600">15.0+</td>
                  </tr>
                </tbody>
              </table>
            </div>
          </section>

          {/* Installation */}
          <section className="mb-12">
            <h2 className="text-xl font-semibold text-gray-900 mb-4">Installation</h2>
            <h3 className="font-medium text-gray-900 mb-2">Swift Package Manager</h3>
            <CodeBlock
              filename="Package.swift"
              code={`dependencies: [
    .package(url: "https://github.com/breakpilot/consent-sdk-ios.git", from: "1.0.0")
]`}
            />
            <p className="text-sm text-gray-600 mt-4">
              Oder in Xcode: File → Add Package Dependencies → URL eingeben
            </p>
          </section>

          {/* Basic Usage */}
          <section className="mb-12">
            <h2 className="text-xl font-semibold text-gray-900 mb-4">Grundlegende Verwendung</h2>
            <CodeBlock
              filename="AppDelegate.swift"
              code={`import ConsentSDK

@main
class AppDelegate: UIResponder, UIApplicationDelegate {
    func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {

        // Consent Manager konfigurieren
        ConsentManager.shared.configure(
            apiEndpoint: "https://api.example.com/consent",
            siteId: "my-ios-app"
        )

        // Initialisieren
        Task {
            await ConsentManager.shared.initialize()
        }

        return true
    }
}`}
            />
          </section>

          {/* SwiftUI Integration */}
          <section className="mb-12">
            <h2 className="text-xl font-semibold text-gray-900 mb-4">SwiftUI Integration</h2>
            <CodeBlock
              filename="ContentView.swift"
              code={`import SwiftUI
import ConsentSDK

struct ContentView: View {
    @StateObject private var consent = ConsentManager.shared

    var body: some View {
        VStack {
            if consent.hasConsent(.analytics) {
                AnalyticsView()
            }

            Button("Alle akzeptieren") {
                Task {
                    await consent.acceptAll()
                }
            }
        }
        .consentBanner() // Zeigt Banner automatisch
    }
}

// Consent Gate Modifier
struct ProtectedView: View {
    var body: some View {
        Text("Geschuetzter Inhalt")
            .requiresConsent(.marketing) {
                // Fallback wenn kein Consent
                Text("Marketing-Zustimmung erforderlich")
            }
    }
}`}
            />
          </section>

          {/* UIKit Integration */}
          <section className="mb-12">
            <h2 className="text-xl font-semibold text-gray-900 mb-4">UIKit Integration</h2>
            <CodeBlock
              filename="ViewController.swift"
              code={`import UIKit
import ConsentSDK
import Combine

class ViewController: UIViewController {
    private var cancellables = Set<AnyCancellable>()

    override func viewDidLoad() {
        super.viewDidLoad()

        // Reaktiv auf Consent-Aenderungen reagieren
        ConsentManager.shared.$consent
            .receive(on: DispatchQueue.main)
            .sink { [weak self] state in
                self?.updateUI(consent: state)
            }
            .store(in: &cancellables)
    }

    private func updateUI(consent: ConsentState?) {
        if consent?.hasConsent(.analytics) == true {
            loadAnalytics()
        }
    }

    @IBAction func acceptAllTapped(_ sender: UIButton) {
        Task {
            await ConsentManager.shared.acceptAll()
        }
    }
}`}
            />
          </section>

          {/* Consent Categories */}
          <section className="mb-12">
            <h2 className="text-xl font-semibold text-gray-900 mb-4">Consent-Kategorien</h2>
            <CodeBlock
              code={`// Verfuegbare Kategorien
enum ConsentCategory {
    case essential      // Immer aktiv
    case functional     // Funktionale Features
    case analytics      // Statistik & Analyse
    case marketing      // Werbung & Tracking
    case social         // Social Media Integration
}

// Consent pruefen
if ConsentManager.shared.hasConsent(.analytics) {
    // Analytics laden
}

// Mehrere Kategorien pruefen
if ConsentManager.shared.hasConsent([.analytics, .marketing]) {
    // Beide Kategorien haben Consent
}`}
            />
          </section>

          {/* API Reference */}
          <section>
            <h2 className="text-xl font-semibold text-gray-900 mb-4">API Referenz</h2>
            <div className="bg-white rounded-xl border border-gray-200 overflow-hidden">
              <table className="min-w-full divide-y divide-gray-200">
                <thead className="bg-gray-50">
                  <tr>
                    <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">Methode</th>
                    <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">Beschreibung</th>
                  </tr>
                </thead>
                <tbody className="divide-y divide-gray-200">
                  <tr>
                    <td className="px-6 py-4"><code className="text-violet-600">configure()</code></td>
                    <td className="px-6 py-4 text-sm text-gray-600">SDK konfigurieren</td>
                  </tr>
                  <tr>
                    <td className="px-6 py-4"><code className="text-violet-600">initialize()</code></td>
                    <td className="px-6 py-4 text-sm text-gray-600">SDK initialisieren (async)</td>
                  </tr>
                  <tr>
                    <td className="px-6 py-4"><code className="text-violet-600">hasConsent(_:)</code></td>
                    <td className="px-6 py-4 text-sm text-gray-600">Consent fuer Kategorie pruefen</td>
                  </tr>
                  <tr>
                    <td className="px-6 py-4"><code className="text-violet-600">acceptAll()</code></td>
                    <td className="px-6 py-4 text-sm text-gray-600">Alle Kategorien akzeptieren (async)</td>
                  </tr>
                  <tr>
                    <td className="px-6 py-4"><code className="text-violet-600">rejectAll()</code></td>
                    <td className="px-6 py-4 text-sm text-gray-600">Alle ablehnen (async)</td>
                  </tr>
                  <tr>
                    <td className="px-6 py-4"><code className="text-violet-600">setConsent(_:)</code></td>
                    <td className="px-6 py-4 text-sm text-gray-600">Spezifische Kategorien setzen (async)</td>
                  </tr>
                  <tr>
                    <td className="px-6 py-4"><code className="text-violet-600">showBanner()</code></td>
                    <td className="px-6 py-4 text-sm text-gray-600">Banner anzeigen</td>
                  </tr>
                  <tr>
                    <td className="px-6 py-4"><code className="text-violet-600">exportConsent()</code></td>
                    <td className="px-6 py-4 text-sm text-gray-600">Consent-Daten exportieren (DSGVO)</td>
                  </tr>
                </tbody>
              </table>
            </div>
          </section>
        </div>
      </main>
    </div>
  )
}