import { expect, test } from 'vitest';
import { buildAMapMarkerURL, gcj02ToWgs84, isValidAMapCoordinate, wgs84ToGcj02 } from './amap';

test('accepts coordinates inside the China vehicle service range', () => {
  expect(isValidAMapCoordinate(116.397128, 39.916527)).toBe(true);
  expect(isValidAMapCoordinate(87.6379, 43.98146)).toBe(true);
});

test('rejects placeholder and out-of-range coordinates', () => {
  expect(isValidAMapCoordinate(0, 0)).toBe(false);
  expect(isValidAMapCoordinate(-0.999999, -0.999999)).toBe(false);
  expect(isValidAMapCoordinate(139.6917, 35.6895)).toBe(false);
  expect(isValidAMapCoordinate(121.4737, 10)).toBe(false);
});

test('converts WGS-84 coordinates to GCJ-02 and supports a precise viewport round trip', () => {
  const wgs: [number, number] = [116.397128, 39.916527];
  const gcj = wgs84ToGcj02(...wgs);
  expect(gcj[0]).toBeCloseTo(116.40337, 5);
  expect(gcj[1]).toBeCloseTo(39.91793, 5);
  const roundTrip = gcj02ToWgs84(...gcj);
  expect(roundTrip[0]).toBeCloseTo(wgs[0], 6);
  expect(roundTrip[1]).toBeCloseTo(wgs[1], 6);
});

test('keeps coordinates outside China unchanged and converts AMap marker links at the rendering boundary', () => {
  expect(wgs84ToGcj02(2.3522, 48.8566)).toEqual([2.3522, 48.8566]);
  const url = new URL(buildAMapMarkerURL({ longitude: 116.397128, latitude: 39.916527, name: '测试车辆' }));
  const position = url.searchParams.get('position')?.split(',').map(Number) ?? [];
  expect(position[0]).toBeCloseTo(116.40337, 5);
  expect(position[1]).toBeCloseTo(39.91793, 5);
});