import { generateText } from 'ai';
import { openai } from '@ai-sdk/openai';

/**
 * Motor de traducción impulsado por Vercel AI SDK y OpenAI.
 * Usa generateText para evitar bugs de compatibilidad con Zod.
 * @param content Objeto con los textos a traducir. Ej: { title: "...", content: "..." }
 * @returns Objeto con los idiomas y sus traducciones
 */
export async function translateContentForCMS(content: Record<string, string>) {
  try {
    const { text } = await generateText({
      model: openai('gpt-4o'), 
      system: `You are an elite technical translator for FLUX, a premium brand of Radio Frequency (RF) industrial machinery.
      
      Your task is to translate the user's JSON content into 4 specific locales:
      1. 'it': Standard Professional Italian.
      2. 'vec': Venetian dialect (from Bassano del Grappa). Maintain a proud, industrial, and authentic tone.
      3. 'es': Professional Spanish (Neutral/Global).
      4. 'de': Professional Industrial German.

      CRITICAL RULES:
      - NEVER translate Markdown syntax (#, **, *, >, |---|).
      - NEVER translate URLs, file paths (like /cases/img.jpg), or code blocks.
      - NEVER translate technical acronyms like "RF", "kW", "MHz", "FLUX".
      - Keep the exact same JSON key names as the input.
      
      OUTPUT FORMAT:
      You MUST return ONLY a raw, valid JSON object. Do not wrap it in \`\`\`json blocks. No pleasantries.
      The output must strictly follow this structure:
      {
        "it": { "key1": "translated text..." },
        "vec": { "key1": "translated text..." },
        "es": { "key1": "translated text..." },
        "de": { "key1": "translated text..." }
      }`,
      
      prompt: JSON.stringify(content),
    });

    // Limpiamos el texto por si GPT-4o decide ponerle "```json" alrededor
    const cleanedText = text.replace(/```json/g, '').replace(/```/g, '').trim();
    
    // Convertimos la respuesta de la IA en un objeto real de Javascript
    const parsedObject = JSON.parse(cleanedText);
    
    return parsedObject;

  } catch (error) {
    console.error("Error in AI Translation:", error);
    return null;
  }
}