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", { 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");

    const { months } = await req.json();
    const monthsCount = months || 12;

    // Buscar stats por mês (em produção, agregar do external)
    const stats = [];
    for (let i = 0; i < monthsCount; i++) {
      const date = new Date();
      date.setMonth(date.getMonth() - (monthsCount - i - 1));
      stats.push({
        month: date.toISOString().substring(0, 7),
        no_show_count: Math.floor(Math.random() * 20),
        total_appointments: Math.floor(Math.random() * 100) + 50,
        no_show_rate: (Math.random() * 20).toFixed(2) + "%",
      });
    }

    const data = { stats, months: monthsCount };

    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" },
      }
    );
  }
});
