/* global Counter */
/* eslint-disable import/no-absolute-path */

import { Meteor } from 'meteor/meteor';
import { check, Match } from 'meteor/check';
import IPGeocoder from '/imports/startup/server/IPGeocoder';
import ActiveFires from '../ActiveFires';

const counter = new Counter('countActiveFires', ActiveFires.find({}));


Meteor.publish('activefirestotal', () => counter);

const validZoom = Match.Where((zoom) => {
  // http://wiki.openstreetmap.org/wiki/Zoom_levels
  check(zoom, Number);
  return zoom >= 0 && zoom <= 19;
});

// https://github.com/3stack-software/meteor-match-library
function NumberBetween(min, max) {
  return Match.Where((x) => {
    check(x, Number);
    return min <= x && x <= max;
  });
}

function NullOr(type) {
  return Match.Where((x) => {
    if (x === null) {
      return true;
    }
    check(x, type);
    return true;
  });
}

// http://wiki.openstreetmap.org/wiki/Zoom_levels
// http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Resolution_and_Scale

// http://cwestblog.com/2012/11/12/javascript-degree-and-radian-conversion/
Math.radians = (degrees) => {
  const rad = (degrees * Math.PI) / 180;
  return rad;
};

const activefires = (zoom, lat, lng, height, width) => {
  // latitude -90 and 90 and the longitude between -180 and 180
  check(lat, NumberBetween(-90, 90));
  check(lng, NumberBetween(-180, 180));

  // console.log("Zoom: " + zoom + " lat: " + lat + " lng: " + lng);
  const resolution = (156543.03 * Math.cos(Math.radians(lat))) / (2 ** zoom);
  const distUnt = resolution * Math.max(height, width);
  const distance = Math.trunc(distUnt);
  // console.log(`so ${height}x${width} gives ${Math.trunc(resolution*height/1000)} x ${Math.trunc(resolution*width/1000)} km, so looking in ${distance}`);
  console.log(`so ${height}x${width} gives ${resolution} of resolution, so looking in ${distance}`);

  return ActiveFires.find({
    ourid: {
      $near: {
        $geometry: {
          type: 'Point',
          coordinates: [lng, lat]
        },
        $minDistance: 0,
        $maxDistance: distance
      }
    }
  }, {
    fields: {
      lat: 1,
      lon: 1,
      scan: 1
    }
  });
};

Meteor.publish('activefiresmyloc', (zoom, lat, lng, height, width) => {
  check(zoom, validZoom);
  check(lat, NullOr(Number));
  check(lng, NullOr(Number));
  check(height, NullOr(Number));
  check(width, NullOr(Number));
  console.log(`Check active fires in ${lat},${lng} with zoom ${zoom} pixels in ${height}x${width} map`);
  if (lat === null || lng === null) {
    let clientIP;
    if (this.connection && this.connection.clientAddress) {
      clientIP = this.connection.clientAddress;
    } else {
      console.warn('We cannot get this meteor connection IP');
      clientIP = '127.0.0.1';
    }
    if (clientIP === '127.0.0.1') {
      clientIP = '80.58.61.250'; // Some Spain IP address
    }
    // https://www.npmjs.com/package/maxmind
    const location = IPGeocoder.get(clientIP);
    console.log(location);
    return activefires(zoom, location.latitude, location.longitude, height, width);
  }
  return activefires(zoom, lat, lng, height, width);
});