'use client'
import { useEffect, useState } from 'react'
import { highlight } from 'sugar-high'
import { getFileContent } from '~/utils/git'

interface Props {
  path: string
  gitRef: string
}

export function FileViewer({ path, gitRef }: Props) {
  const [content, setContent] = useState<string | null>(null)
  const [error, setError] = useState<string | null>(null)
  const [loading, setLoading] = useState(true)

  useEffect(() => {
    setLoading(true)
    setError(null)
    getFileContent({ data: { ref: gitRef, path } })
      .then((c: string) => {
        setContent(c)
        setLoading(false)
      })
      .catch((e: Error) => {
        setError(e.message || 'Failed to load file')
        setLoading(false)
      })
  }, [path, gitRef])

  if (loading) {
    return (
      <div className="flex h-full items-center justify-center text-gray-600">
        Loading...
      </div>
    )
  }

  if (error) {
    return (
      <div className="flex h-full items-center justify-center text-red-500">
        {error}
      </div>
    )
  }

  const isBinary =
    content !== null && content.includes('\x00')

  return (
    <div className="flex h-full flex-col">
      <div className="flex items-center gap-2 border-b border-gray-800 px-4 py-2 text-sm">
        <span className="font-mono text-gray-300">{path}</span>
        {content && (
          <span className="text-xs text-gray-600">
            {content.split('\n').length} lines
          </span>
        )}
      </div>
      <div className="flex-1 overflow-auto">
        {isBinary ? (
          <div className="flex h-full items-center justify-center text-gray-500">
            Binary file
          </div>
        ) : (
          <HighlightedCode code={content || ''} filename={path} />
        )}
      </div>
    </div>
  )
}

function HighlightedCode({
  code,
  filename,
}: {
  code: string
  filename: string
}) {
  const html = highlight(code)
  const lines = html.split('\n')

  return (
    <div className="sh-code overflow-auto font-mono text-sm">
      <table className="w-full border-collapse">
        <tbody>
          {lines.map((line, i) => (
            <tr key={i} className="hover:bg-gray-900/50">
              <td className="sticky left-0 w-12 select-none bg-gray-950 pr-3 text-right text-xs text-gray-600">
                {i + 1}
              </td>
              <td
                className="whitespace-pre px-4 py-0"
                dangerouslySetInnerHTML={{ __html: line || ' ' }}
              />
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  )
}