import assert from "node:assert/strict";
import { after, before, test } from "node:test";

import { createServer } from "vite";

let server;
let ghostPins;

before(async () => {
  server = await createServer({
    appType: "custom",
    logLevel: "silent",
    server: { middlewareMode: true },
  });
  ghostPins = await server.ssrLoadModule("/src/core/map/ghostPins.ts");
});

after(async () => {
  await server?.close();
});

test("ghost pins are generated inside the requested current-view radius", () => {
  const samples = [0, 0.25, 0.5, 0.75, 0.1, 0.9];
  let index = 0;
  const pins = ghostPins.generateGhostPins({
    anchor: { longitude: 37.618423, latitude: 55.751244 },
    count: 3,
    radiusMeters: 1_000,
    maximumSpeedMetersPerSecond: 12,
    random: () => samples[index++ % samples.length],
    timestamp: 42,
  });

  assert.equal(pins.length, 3);
  assert.equal(new Set(pins.map((pin) => pin.label)).size, 3);
  assert.ok(pins.every((pin) => /^\d{6}$/.test(pin.label)));
  assert.ok(pins.every((pin) => pin.id.startsWith("ghost-16-")));
  assert.ok(pins.every((pin) => pin.speedMetersPerSecond >= 2.4));
  assert.ok(pins.every((pin) => pin.speedMetersPerSecond <= 12));
});

test("numeric pin names remain unique with a degenerate random source", () => {
  const pins = ghostPins.generateGhostPins({
    anchor: { longitude: 37.618423, latitude: 55.751244 },
    count: 4,
    radiusMeters: 1_000,
    maximumSpeedMetersPerSecond: 18,
    random: () => 0,
    timestamp: 42,
  });

  assert.equal(new Set(pins.map((pin) => pin.label)).size, 4);
});