import { NextRequest, NextResponse } from "next/server";

// MiniMax API configuration
const MINIMAX_API_KEY = process.env.MINIMAX_API_KEY || "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJTaXRlTWVudGUiLCJyb2xlIjoiYW5vbiIsImlhdCI6MTczODcxMjAwMCwiZXhwIjoyMDU0MzcyMDAwfQ.VxYNdTUkG4N0K2T8K3pK4JzY3vN8X9vK2pK3JzY2vN8X9";
const MINIMAX_BASE_URL = "https://api.minimax.chat/v1";

interface Message {
  role: "user" | "assistant";
  content: string;
}

interface RequestBody {
  message: string;
  language: "es" | "en";
  businessType: string;
  businessName: string;
  history?: Message[];
}

export async function POST(request: NextRequest) {
  try {
    const body: RequestBody = await request.json();
    const { message, language, businessType, businessName, history = [] } = body;

    // Build conversation context
    const systemPrompt = `You are a friendly AI assistant for ${businessName}, a ${businessType} business.
    
IMPORTANT RULES:
- Always respond in the SAME language the user uses
- Default to Spanish (respond in Spanish unless user clearly speaks English)
- Keep responses SHORT: 1-3 sentences max
- Be helpful, friendly, and professional
- If asked about pricing, mention: €299-€1,950/month depending on plan
- If asked about booking, say you'll help them book
- Never make up specific prices or details you don't know

Current language mode: ${language}`;

    // Build messages array
    const messages: Message[] = [
      { role: "assistant", content: systemPrompt }
    ];
    
    // Add history (last 5 messages for context)
    if (history.length > 0) {
      messages.push(...history.slice(-5));
    }
    
    // Add current message
    messages.push({ role: "user", content: message });

    // Call MiniMax API
    const response = await fetch(`${MINIMAX_BASE_URL}/text/chatcompletion_v2`, {
      method: "POST",
      headers: {
        "Authorization": `Bearer ${MINIMAX_API_KEY}`,
        "Content-Type": "application/json"
      },
      body: JSON.stringify({
        model: "MiniMax-M2.5",
        messages,
        temperature: 0.7,
        max_tokens: 500
      })
    });

    if (!response.ok) {
      const error = await response.text();
      console.error("MiniMax API error:", error);
      
      // Fallback response
      const fallbackResponse = language === "es"
        ? "Lo siento, tuve un problema técnico. ¿Puedes repetir tu pregunta?"
        : "Sorry, I had a technical issue. Can you repeat your question?";
      
      return NextResponse.json({ response: fallbackResponse });
    }

    const data = await response.json();
    const aiResponse = data.choices?.[0]?.message?.content || 
                       data.reply || 
                       (language === "es" 
                         ? "Gracias por tu mensaje. ¿En qué más puedo ayudarte?" 
                         : "Thanks for your message. How else can I help you?");

    return NextResponse.json({ response: aiResponse });

  } catch (error) {
    console.error("Voice chat API error:", error);
    return NextResponse.json(
      { error: "Internal server error" },
      { status: 500 }
    );
  }
}

// Disable body parsing for streaming if needed
export const runtime = "nodejs";