import { validateExternalAuth } from "../_shared/auth.ts";

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

Deno.serve(async (req) => {
  if (req.method === "OPTIONS")
    return new Response("ok", { status: 200, headers: corsHeaders() });

  try {
    const authHeader = req.headers.get("Authorization");
    const supabase = createClient(
      Deno.env.get("SUPABASE_URL")!,
      Deno.env.get("SUPABASE_ANON_KEY")!,
      { global: { headers: { Authorization: authHeader! } } }
    );

    const {
      data: { user },
    } = await supabase.auth.getUser();
    if (!user) throw new Error("Unauthorized");

    if (req.method === "GET") {
      const { data, error } = await supabase
        .from("user_preferences")
        .select("*")
        .eq("user_id", user.id)
        .single();
      if (error && error.code !== "PGRST116") throw error;
      return new Response(JSON.stringify({ success: true, data: data || {} }), {
        headers: { ...corsHeaders, "Content-Type": "application/json" },
      });
    }

    const preferences = await req.json();
    const { data, error } = await supabase
      .from("user_preferences")
      .upsert(
        {
          user_id: user.id,
          ...preferences,
          updated_at: new Date().toISOString(),
        },
        { onConflict: "user_id" }
      )
      .select()
      .single();

    if (error) throw error;

    return new Response(JSON.stringify({ success: true, data }), {
      headers: { ...corsHeaders, "Content-Type": "application/json" },
    });
  } catch (error: any) {
    return new Response(
      JSON.stringify({ success: false, error: error.message }),
      {
        status: 400,
        headers: { ...corsHeaders, "Content-Type": "application/json" },
      }
    );
  }
});