'use client'

import { useState } from 'react'
import Link from 'next/link'

export default function Playground() {
  const [apiKey, setApiKey] = useState('')
  const [url, setUrl] = useState('https://example.com')
  const [endpoint, setEndpoint] = useState('screenshot')
  const [options, setOptions] = useState('{}')
  const [result, setResult] = useState('')
  const [loading, setLoading] = useState(false)
  const [codeLang, setCodeLang] = useState('curl')

  const endpoints = [
    { value: 'screenshot', label: 'Screenshot' },
    { value: 'pdf', label: 'PDF' },
    { value: 'crawl', label: 'Crawl' },
    { value: 'content', label: 'Content' },
    { value: 'markdown', label: 'Markdown' },
    { value: 'json', label: 'JSON' },
    { value: 'links', label: 'Links' },
    { value: 'scrape', label: 'Scrape' },
    { value: 'snapshot', label: 'Snapshot' },
    { value: 'extract', label: 'AI Extract' },
  ]

  async function sendRequest() {
    setLoading(true)
    try {
      const body: any = { url }
      if (options && options !== '{}') {
        body.options = JSON.parse(options)
      }
      const res = await fetch(`http://localhost:3000/api/${endpoint}`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'x-api-key': apiKey,
        },
        body: JSON.stringify(body),
      })
      const data = await res.json()
      setResult(JSON.stringify(data, null, 2))
    } catch (e) {
      setResult(String(e))
    } finally {
      setLoading(false)
    }
  }

  function getCodeSnippet() {
    const body = JSON.stringify({ url, options: JSON.parse(options || '{}') }, null, 2)
    switch (codeLang) {
      case 'curl':
        return `curl -X POST http://localhost:3000/api/${endpoint} \\
  -H "Content-Type: application/json" \\
  -H "x-api-key: ${apiKey || 'YOUR_API_KEY'}" \\
  -d '${body}'`
      case 'python':
        return `import requests

response = requests.post(
    "http://localhost:3000/api/${endpoint}",
    headers={
        "Content-Type": "application/json",
        "x-api-key": "${apiKey || 'YOUR_API_KEY'}"
    },
    json=${body.replace(/true/g, 'True').replace(/false/g, 'False').replace(/null/g, 'None')}
)
print(response.json())`
      case 'javascript':
        return `const response = await fetch('http://localhost:3000/api/${endpoint}', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'x-api-key': '${apiKey || 'YOUR_API_KEY'}'
  },
  body: JSON.stringify(${body})
});
const data = await response.json();
console.log(data);`
      default:
        return ''
    }
  }

  return (
    <main style={{ maxWidth: 1200, margin: '0 auto', padding: '40px 20px' }}>
      <nav style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: 40 }}>
        <Link href="/" style={{ fontSize: 24, fontWeight: 700, color: '#fff', textDecoration: 'none' }}>Crawl API</Link>
        <Link href="/" style={{ color: '#888', textDecoration: 'none' }}>← Back</Link>
      </nav>

      <h1 style={{ fontSize: 36, marginBottom: 8 }}>API Playground</h1>
      <p style={{ color: '#888', marginBottom: 32 }}>Test any endpoint directly from the browser.</p>

      <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: 24 }}>
        <div>
          <div style={{ background: '#111', borderRadius: 12, padding: 24, marginBottom: 24 }}>
            <h3 style={{ marginTop: 0 }}>Request</h3>
            <div style={{ display: 'grid', gap: 12 }}>
              <div>
                <label style={{ display: 'block', color: '#888', marginBottom: 4, fontSize: 13 }}>API Key</label>
                <input type="text" value={apiKey} onChange={e => setApiKey(e.target.value)} placeholder="your-api-key"
                  style={{ width: '100%', padding: 10, background: '#1a1a1a', border: '1px solid #333', borderRadius: 6, color: '#fff', fontSize: 13, boxSizing: 'border-box' }} />
              </div>
              <div>
                <label style={{ display: 'block', color: '#888', marginBottom: 4, fontSize: 13 }}>Endpoint</label>
                <select value={endpoint} onChange={e => setEndpoint(e.target.value)}
                  style={{ width: '100%', padding: 10, background: '#1a1a1a', border: '1px solid #333', borderRadius: 6, color: '#fff', fontSize: 13 }}>
                  {endpoints.map(ep => <option key={ep.value} value={ep.value}>{ep.label}</option>)}
                </select>
              </div>
              <div>
                <label style={{ display: 'block', color: '#888', marginBottom: 4, fontSize: 13 }}>URL</label>
                <input type="text" value={url} onChange={e => setUrl(e.target.value)}
                  style={{ width: '100%', padding: 10, background: '#1a1a1a', border: '1px solid #333', borderRadius: 6, color: '#fff', fontSize: 13, boxSizing: 'border-box' }} />
              </div>
              <div>
                <label style={{ display: 'block', color: '#888', marginBottom: 4, fontSize: 13 }}>Options (JSON)</label>
                <textarea value={options} onChange={e => setOptions(e.target.value)} rows={4}
                  style={{ width: '100%', padding: 10, background: '#1a1a1a', border: '1px solid #333', borderRadius: 6, color: '#fff', fontSize: 13, boxSizing: 'border-box', fontFamily: 'monospace' }} />
              </div>
              <button onClick={sendRequest} disabled={loading}
                style={{ background: loading ? '#333' : '#fff', color: '#000', padding: '12px', borderRadius: 6, border: 'none', fontWeight: 600, cursor: loading ? 'not-allowed' : 'pointer' }}>
                {loading ? 'Sending...' : 'Send Request'}
              </button>
            </div>
          </div>

          <div style={{ background: '#111', borderRadius: 12, padding: 24 }}>
            <h3 style={{ marginTop: 0 }}>Code Snippet</h3>
            <div style={{ display: 'flex', gap: 8, marginBottom: 12 }}>
              {['curl', 'python', 'javascript'].map(l => (
                <button key={l} onClick={() => setCodeLang(l)}
                  style={{ background: codeLang === l ? '#fff' : '#1a1a1a', color: codeLang === l ? '#000' : '#888', padding: '6px 12px', borderRadius: 4, border: 'none', fontSize: 12, cursor: 'pointer', textTransform: 'uppercase' }}>
                  {l}
                </button>
              ))}
            </div>
            <pre style={{ margin: 0, fontSize: 12, overflow: 'auto', background: '#0a0a0a', padding: 12, borderRadius: 6 }}>{getCodeSnippet()}</pre>
          </div>
        </div>

        <div>
          <div style={{ background: '#111', borderRadius: 12, padding: 24, height: '100%' }}>
            <h3 style={{ marginTop: 0 }}>Response</h3>
            {result ? (
              <pre style={{ margin: 0, fontSize: 13, overflow: 'auto', background: '#0a0a0a', padding: 12, borderRadius: 6, height: 'calc(100% - 40px)' }}>{result}</pre>
            ) : (
              <div style={{ color: '#555', textAlign: 'center', padding: '40px 0' }}>Send a request to see the response</div>
            )}
          </div>
        </div>
      </div>
    </main>
  )
}