import { Prism as SyntaxHighlighter } from 'react-syntax-highlighter'
import { oneDark } from 'react-syntax-highlighter/dist/esm/styles/prism'
import { useCopyToClipboard } from '../hooks/useCopyToClipboard'

// Map our common short names to Prism language ids
const LANG_ALIASES = {
  jsx: 'jsx', tsx: 'tsx', js: 'javascript', javascript: 'javascript',
  ts: 'typescript', typescript: 'typescript',
  py: 'python', python: 'python',
  sh: 'bash', shell: 'bash', bash: 'bash', zsh: 'bash',
  html: 'markup', xml: 'markup', svg: 'markup',
  css: 'css', json: 'json', yaml: 'yaml', yml: 'yaml',
  sql: 'sql', md: 'markdown', markdown: 'markdown',
}

export default function CodeBlock({ lang, children, dense = false }) {
  const code = String(children || '').replace(/\n$/, '')
  const language = LANG_ALIASES[(lang || '').toLowerCase()] || 'text'
  const { copied, copy } = useCopyToClipboard()

  return (
    <div className="relative group my-2 rounded-lg overflow-hidden border" style={{ borderColor: 'var(--border)' }}>
      <div
        className="flex items-center justify-between px-3 py-1.5 text-[10px] uppercase tracking-wider"
        style={{ background: 'var(--surface-3)', color: 'var(--text-faint)' }}
      >
        <span className="mono">{language === 'text' ? 'code' : language}</span>
        <button
          onClick={() => copy(code, 'Code copied')}
          className="text-[var(--text-dim)] hover:text-[var(--text)] transition-colors flex items-center gap-1"
          title="Copy code"
        >
          {copied ? (
            <>
              <svg width="11" height="11" viewBox="0 0 16 16" fill="none" stroke="currentColor" strokeWidth="2.2" strokeLinecap="round" strokeLinejoin="round">
                <path d="M3 8.5l3.5 3.5L13 4.5" />
              </svg>
              copied
            </>
          ) : (
            <>
              <svg width="11" height="11" viewBox="0 0 16 16" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round">
                <rect x="4" y="4" width="9" height="9" rx="1.5" />
                <path d="M3 11V3.5A1.5 1.5 0 0 1 4.5 2H11" />
              </svg>
              copy
            </>
          )}
        </button>
      </div>
      <SyntaxHighlighter
        language={language}
        style={oneDark}
        showLineNumbers={false}
        customStyle={{
          margin: 0,
          padding: dense ? '10px 12px' : '14px 14px',
          background: 'var(--surface-2)',
          fontSize: 12.5,
          lineHeight: 1.55,
          fontFamily: "'JetBrains Mono', ui-monospace, monospace",
        }}
        codeTagProps={{ style: { fontFamily: "'JetBrains Mono', ui-monospace, monospace" } }}
        wrapLongLines
      >
        {code}
      </SyntaxHighlighter>
    </div>
  )
}