import express from "express";
import * as dal from "../dal/staticDal.js";

const router = express.Router();

router.get("/", (req, res) => {
  let vehicles = dal.getVehicles();

  const {routeNum, routeName, destination, minLat, maxLat, minLng, maxLng, limit} = req.query;

  if (routeNum) vehicles = vehicles.filter(v => String(v.routeNum) === String(routeNum));
  if (routeName) vehicles = vehicles.filter(v => v.routeName && v.routeName.toLowerCase().includes(String(routeName).toLowerCase()));
  if (destination) vehicles = vehicles.filter(v => v.destination && v.destination.toLowerCase().includes(String(destination).toLowerCase()));

  if (minLat || maxLat || minLng || maxLng) {
    const minLatN = parseFloat(minLat ?? -90);
    const maxLatN = parseFloat(maxLat ?? 90);
    const minLngN = parseFloat(minLng ?? -180);
    const maxLngN = parseFloat(maxLng ?? 180);

    vehicles = vehicles.filter(v => {
      const lat = parseFloat(v.location?.latitude);
      const lng = parseFloat(v.location?.longitude);

      return lat >= minLatN && lat <= maxLatN && lng >= minLngN && lng <= maxLngN;
    });

  }

  let returned = vehicles.length;
  if (limit) {
    const lim = Math.max(1, Math.min(1000, parseInt(limit, 10) || 100));

    vehicles = vehicles.slice(0, lim);
    returned = vehicles.length;
  }

  res.json({meta: {returned}, data: vehicles});
});

router.get("/:id", (req, res) => {
  const v = dal.getVehicleById(req.params.id);
  if (!v) return res.status(404).json({error: "Vehicle Was Not Found"});
  
  res.json({data: v});
});

export default router;