import CommonService from '@/api/common'
import type { AudioItem, TranscriptionResult } from '@/src/types/global'

/**
 * 转录数据接口
 */
interface TranscriptionData {
  file_url?: string
  transcripts?: Array<{ text: string }>
}

/**
 * 响应结果接口
 */
interface TranscriptionResponse {
  results: Array<{
    transcription_url: string
  }>
}

/**
 * 将音频列表转换为文本转录
 * @param list - 音频项列表
 * @returns 转录结果数组
 * @throws 当转录过程出错时抛出错误
 * 
 * @example
 * const audioList = [{ audio_url: 'https://example.com/audio.mp3' }]
 * const transcriptions = await getVoiceText(audioList)
 * console.log(transcriptions) // [{ key: 'url', value: 'transcribed text' }]
 */
export async function getVoiceText(list: AudioItem[]): Promise<TranscriptionResult[]> {
  // 调用API将视频转换为文本
  const ret = await CommonService.videoToCharacters({
    fileLinkList: list.map(item => item.audio_url),
  })
  
  // 解析响应数据
  const data: string = ret.data
  const rst: TranscriptionResponse = JSON.parse(data)
  const transcription_url: string[] = rst.results.map(item => item.transcription_url)
  
  // 并行获取所有转录内容
  const transcriptions: TranscriptionResult[] = await Promise.all(
    (transcription_url || []).filter(Boolean).map(async (url: string): Promise<TranscriptionResult> => {
      try {
        const resp: Response = await fetch(url)
        const contentType: string = resp.headers.get('content-type') || ''
        const value: string = contentType.includes('application/json')
          ? JSON.stringify(await resp.json())
          : await resp.text()
        const parsed: TranscriptionData = JSON.parse(value)
        return { 
          key: url, 
          audio_url: parsed.file_url, 
          value: parsed.transcripts?.[0]?.text || '' 
        }
      } catch (e: unknown) {
        console.warn('获取转写内容失败:', url, e)
        return { key: url, value: '' }
      }
    })
  )
  return transcriptions
}

/**
 * Hook 返回值接口
 */
interface UseVoiceTextReturn {
  getVoiceText: (list: AudioItem[]) => Promise<TranscriptionResult[]>
}

/**
 * 语音文本转换 Hook
 * @returns 包含 getVoiceText 方法的对象
 * 
 * @example
 * const { getVoiceText } = useVoiceText()
 * const result = await getVoiceText(audioList)
 */
export default function useVoiceText(): UseVoiceTextReturn {
  return { getVoiceText }
}