'use client'

import { useState, useMemo } from 'react'
import { Copy, Check } from 'lucide-react'
import { CookieBannerConfig } from '@/lib/sdk/einwilligungen/types'
import { generateEmbedCode } from '@/lib/sdk/einwilligungen/generator/cookie-banner'

interface EmbedCodeViewerProps {
  config: CookieBannerConfig | null
}

export function EmbedCodeViewer({ config }: EmbedCodeViewerProps) {
  const [activeTab, setActiveTab] = useState<'script' | 'html' | 'css' | 'js'>('script')
  const [copied, setCopied] = useState(false)

  const embedCode = useMemo(() => {
    if (!config) return null
    return generateEmbedCode(config, '/datenschutz')
  }, [config])

  const copyToClipboard = async (text: string) => {
    await navigator.clipboard.writeText(text)
    setCopied(true)
    setTimeout(() => setCopied(false), 2000)
  }

  if (!embedCode) {
    return (
      <div className="flex items-center justify-center h-48 bg-slate-100 rounded-xl">
        <p className="text-slate-400">Embed-Code wird generiert...</p>
      </div>
    )
  }

  const tabs = [
    { id: 'script', label: 'Script-Tag', content: embedCode.scriptTag },
    { id: 'html', label: 'HTML', content: embedCode.html },
    { id: 'css', label: 'CSS', content: embedCode.css },
    { id: 'js', label: 'JavaScript', content: embedCode.js },
  ] as const

  const currentContent = tabs.find((t) => t.id === activeTab)?.content || ''

  return (
    <div className="border border-slate-200 rounded-xl overflow-hidden">
      <div className="flex border-b border-slate-200 bg-slate-50">
        {tabs.map((tab) => (
          <button
            key={tab.id}
            onClick={() => setActiveTab(tab.id)}
            className={`px-4 py-2 text-sm font-medium transition-colors ${
              activeTab === tab.id
                ? 'bg-white text-indigo-600 border-b-2 border-indigo-600 -mb-px'
                : 'text-slate-600 hover:text-slate-900'
            }`}
          >
            {tab.label}
          </button>
        ))}
      </div>

      <div className="relative">
        <pre className="p-4 bg-slate-900 text-slate-100 text-sm font-mono overflow-x-auto max-h-[400px]">
          {currentContent}
        </pre>
        <button
          onClick={() => copyToClipboard(currentContent)}
          className="absolute top-3 right-3 flex items-center gap-1.5 px-3 py-1.5 bg-slate-800 hover:bg-slate-700 text-slate-200 rounded-lg text-xs"
        >
          {copied ? (
            <>
              <Check className="w-3.5 h-3.5 text-green-400" />
              Kopiert
            </>
          ) : (
            <>
              <Copy className="w-3.5 h-3.5" />
              Kopieren
            </>
          )}
        </button>
      </div>

      {activeTab === 'script' && (
        <div className="p-4 bg-amber-50 border-t border-amber-200">
          <p className="text-sm text-amber-800">
            <strong>Integration:</strong> Fuegen Sie den Script-Tag in den{' '}
            <code className="bg-amber-100 px-1 rounded">&lt;head&gt;</code> oder vor dem
            schliessenden{' '}
            <code className="bg-amber-100 px-1 rounded">&lt;/body&gt;</code>-Tag ein.
          </p>
        </div>
      )}
    </div>
  )
}