import { serve } from "https://deno.land/std@0.168.0/http/server.ts";

const corsHeaders = {
  "Access-Control-Allow-Origin": "*",
  "Access-Control-Allow-Headers": "authorization, x-client-info, apikey, content-type, x-supabase-client-platform, x-supabase-client-platform-version, x-supabase-client-runtime, x-supabase-client-runtime-version",
};

serve(async (req) => {
  if (req.method === "OPTIONS") {
    return new Response(null, { headers: corsHeaders });
  }

  try {
    const { query } = await req.json();

    if (!query || typeof query !== "string" || query.trim().length === 0 || query.length > 200) {
      return new Response(JSON.stringify({ error: "Invalid query" }), {
        status: 400,
        headers: { ...corsHeaders, "Content-Type": "application/json" },
      });
    }

    const LOVABLE_API_KEY = Deno.env.get("LOVABLE_API_KEY");
    if (!LOVABLE_API_KEY) {
      return new Response(JSON.stringify({ error: "AI not configured" }), {
        status: 500,
        headers: { ...corsHeaders, "Content-Type": "application/json" },
      });
    }

    const response = await fetch("https://ai.gateway.lovable.dev/v1/chat/completions", {
      method: "POST",
      headers: {
        Authorization: `Bearer ${LOVABLE_API_KEY}`,
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        model: "google/gemini-2.5-flash-lite",
        messages: [
          {
            role: "system",
            content: "You are a translator. Translate the user's Minecraft-related search query to English. Return ONLY the translated text, nothing else. If it's already in English, return it as-is. Keep Minecraft mod names unchanged.",
          },
          { role: "user", content: query.trim() },
        ],
      }),
    });

    if (!response.ok) {
      if (response.status === 429) {
        return new Response(JSON.stringify({ error: "Rate limited" }), {
          status: 429,
          headers: { ...corsHeaders, "Content-Type": "application/json" },
        });
      }
      const t = await response.text();
      console.error("AI error:", response.status, t);
      return new Response(JSON.stringify({ error: "Translation failed" }), {
        status: 500,
        headers: { ...corsHeaders, "Content-Type": "application/json" },
      });
    }

    const data = await response.json();
    const translated = data.choices?.[0]?.message?.content?.trim() || query;

    return new Response(JSON.stringify({ translated, original: query.trim() }), {
      headers: { ...corsHeaders, "Content-Type": "application/json" },
    });
  } catch (error) {
    console.error("translate error:", error);
    return new Response(JSON.stringify({ error: "Translation failed" }), {
      status: 500,
      headers: { ...corsHeaders, "Content-Type": "application/json" },
    });
  }
});