import { useState, useCallback } from 'react'

interface UseFullTranscriptOptions {
  videoId: string
}

export function useFullTranscript({ videoId }: UseFullTranscriptOptions) {
  const [fullTranscript, setFullTranscript] = useState('')
  const [isLoading, setIsLoading] = useState(false)
  const [error, setError] = useState<string | null>(null)

  const requestFullTranscript = useCallback(async () => {
    setIsLoading(true)
    setError(null)
    try {
      const base = import.meta.env.VITE_API_BASE_URL ?? ''
      const resp = await fetch(`${base}/api/v1/video/${videoId}/transcribe`, {
        method: 'POST',
      })
      if (!resp.ok) {
        throw new Error(`Server returned ${resp.status}`)
      }
      const data = await resp.json()
      setFullTranscript(data.text)
      return data.text
    } catch (err) {
      const msg = err instanceof Error ? err.message : 'Transcription failed'
      setError(msg)
      return null
    } finally {
      setIsLoading(false)
    }
  }, [videoId])

  return { fullTranscript, isLoading, error, requestFullTranscript }
}