"use strict";

const { OS } = ChromeUtils.import("resource://gre/modules/osfile.jsm");
const { Region } = ChromeUtils.import("resource://gre/modules/Region.jsm");
const { sinon } = ChromeUtils.import("resource://testing-common/Sinon.jsm");

async function readFile(file) {
  let decoder = new TextDecoder();
  let data = await OS.File.read(file.path);
  return decoder.decode(data);
}

function setLocation(location) {
  Services.prefs.setCharPref(
    "geo.provider.network.url",
    `data:application/json,${JSON.stringify({ location })}`
  );
}

async function stubMap(path, fun) {
  let map = await readFile(do_get_file(path));
  sinon.stub(Region, fun).resolves(JSON.parse(map));
}

add_task(async function test_setup() {
  await stubMap("regions/world.geojson", "_getPlainMap");
  await stubMap("regions/world-buffered.geojson", "_getBufferedMap");
});

const LOCATIONS = [
  { lat: 55.867005, lng: -4.271078, expectedRegion: "GB" },
  // Small cove in Italy surrounded by another region.
  { lat: 45.6523148, lng: 13.7486427, expectedRegion: "IT" },
  // In Bosnia and Herzegovina but within a lot of borders.
  { lat: 42.557079, lng: 18.4370373, expectedRegion: "HR" },
  // In the sea bordering Italy and a few other regions.
  { lat: 45.608696, lng: 13.4667903, expectedRegion: "IT" },
  // In the middle of the Atlantic.
  { lat: 35.4411368, lng: -41.5372973, expectedRegion: null },
];

add_task(async function test_basic() {
  for (const { lat, lng, expectedRegion } of LOCATIONS) {
    setLocation({ lat, lng });
    let region = await Region._getRegionLocally();
    Assert.equal(
      region,
      expectedRegion,
      `Got the expected region at ${lat},${lng}`
    );
  }
});