const { runWithModel } = require('./shared')

/**
 * 入参：prompt, model, imageUrl
 * imageUrl：单张 data URL / https，或 **多张 URL 的数组**（与 OpenAI 多图 content 一致）
 */
async function executeImg2text ({ prompt, model, imageUrl, folderPath }) {
  const p = prompt != null ? String(prompt).trim() : ''
  let url
  if (Array.isArray(imageUrl)) {
    url = imageUrl.map((u) => String(u || '').trim()).filter(Boolean)
  } else {
    url = imageUrl != null ? String(imageUrl).trim() : ''
  }
  if (!url || (Array.isArray(url) && url.length === 0)) {
    return { success: false, error: 'img2text 缺少 imageUrl（或非空 URL 数组）' }
  }
  try {
    const result = await runWithModel('img2text', 'doubao_img2text', [p, url], model)
    if (!result.success) return { success: false, error: result.error || 'img2text 失败' }
    const data = result.data
    const text = data?.choices?.[0]?.message?.content ?? data?.choices?.[0]?.text ?? ''
    return { success: true, value: typeof text === 'string' ? text : String(text) }
  } catch (e) {
    return { success: false, error: (e && (e.message || String(e))) || 'img2text 异常' }
  }
}

module.exports = { executeImg2text }