import { serve } from "https://deno.land/std@0.168.0/http/server.ts";
import { mydb } from "../../lib/mySupabase.ts";
import { corsHeaders, jsonResponse, errorResponse } from "../../lib/utils.ts";

/**
 * GET /virtual-queue/:doctor_id
 * Listar fila virtual do médico
 *
 * Params:
 * doctor_id: uuid
 *
 * Returns:
 * {
 *   queue: [{
 *     id: uuid,
 *     patient_id: uuid,
 *     position: number,
 *     status: string,
 *     estimated_wait_minutes: number,
 *     checked_in_at: timestamptz
 *   }]
 * }
 */

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

  try {
    const authHeader = req.headers.get("Authorization") || "";

    const url = new URL(req.url);
    const doctorId = url.pathname.split("/").pop();

    if (req.method !== "GET") {
      return errorResponse("Method not allowed", 405);
    }

    if (!doctorId) {
      return errorResponse("doctor_id is required", 400);
    }

    // Buscar fila virtual filtrada por médico
    const queueRes = await mydb
      .from("virtual_queue")
      .select("*")
      .eq("external_doctor_id", doctorId)
      .eq("status", "waiting")
      .order("position", { ascending: true });

    if (queueRes.error) {
      return errorResponse(queueRes.error.message);
    }

    // Enriquecer com dados do Supabase externo
    const { getExternalPatients } = await import("../_shared/external.ts");

    type QueueEntry = {
      external_patient_id: string;
      [key: string]: unknown;
    };

    const enrichedQueue = await Promise.all(
      (queueRes.data || []).map(async (entry: QueueEntry) => {
        try {
          const patients = await getExternalPatients(
            { id: entry.external_patient_id },
            authHeader
          );
          const patient = Array.isArray(patients) ? patients[0] : null;
          return {
            ...entry,
            patient_name:
              (patient as Record<string, unknown>)?.full_name || "Desconhecido",
            patient_cpf: (patient as Record<string, unknown>)?.cpf,
          };
        } catch {
          return entry;
        }
      })
    );

    // Audit log (simplified - no auth validation)
    await mydb.from("audit_log").insert({
      action: "view_virtual_queue",
      entity_type: "virtual_queue",
      external_entity_id: doctorId,
      metadata: { doctor_id: doctorId, count: queueRes.data?.length || 0 },
    });

    return jsonResponse({
      queue: enrichedQueue || [],
      total_waiting: enrichedQueue.length,
      current_patient: enrichedQueue[0] || null,
      average_wait_minutes: 15,
    });
  } catch (error: unknown) {
    console.error("[virtual-queue]", error);
    const err = error as Error;
    return errorResponse(err.message, 500);
  }
});