// If using TypeScript, ensure Jest types are available
// This import is only necessary if your environment does not provide 'expect' globally
import { describe, expect, it } from '@jest/globals';
import { getCoordinatesFromZip, SAN_DIEGO_ZIP_COORDINATES } from './location';
import { LIBRARY_LOCATIONS as LIBRARY_LOCATIONS_OBJ } from '../api/availability/route';
// Convert the object to an array of coordinates for testing
const LIBRARY_LOCATIONS = Object.values(LIBRARY_LOCATIONS_OBJ);
const ZIP_COORDS = Object.entries(SAN_DIEGO_ZIP_COORDINATES || {});

describe('San Diego ZIP and Library Coordinates', () => {
  it('all ZIP code lat/lngs are unique', () => {
    const seen = new Map();
    let duplicate = null;
    for (const [zip, coord] of ZIP_COORDS) {
      const { lat, lng } = coord as { lat: number; lng: number };
      const key = `${lat},${lng}`;
      if (seen.has(key)) {
        duplicate = { zip, other: seen.get(key), lat, lng };
        break;
      }
      seen.set(key, zip);
    }
    if (duplicate) {
      throw new Error(`Duplicate ZIP coordinates: ${duplicate.zip} and ${duplicate.other} share (${duplicate.lat}, ${duplicate.lng})`);
    }
    expect(duplicate).toBe(null);
  });

  it('all library lat/lngs are unique', () => {
    const seen = new Map();
    let duplicate = null;
    for (const [i, coord] of LIBRARY_LOCATIONS.entries()) {
      const key = `${coord.lat},${coord.lng}`;
      if (seen.has(key)) {
        duplicate = { idx: i, other: seen.get(key), lat: coord.lat, lng: coord.lng };
        break;
      }
      seen.set(key, i);
    }
    if (duplicate) {
      throw new Error(`Duplicate library coordinates: index ${duplicate.idx} and ${duplicate.other} share (${duplicate.lat}, ${duplicate.lng})`);
    }
    expect(duplicate).toBe(null);
  });

  it('no ZIP code lat/lng matches any library lat/lng', () => {
    const librarySet = new Set(LIBRARY_LOCATIONS.map(c => `${c.lat},${c.lng}`));
    let conflict = null;
    for (const [zip, coord] of ZIP_COORDS) {
      const { lat, lng } = coord as { lat: number; lng: number };
      const key = `${lat},${lng}`;
      if (librarySet.has(key)) {
        conflict = { zip, lat, lng };
        break;
      }
    }
    if (conflict) {
      throw new Error(`ZIP code ${conflict.zip} shares coordinates (${conflict.lat}, ${conflict.lng}) with a library`);
    }
    expect(conflict).toBe(null);
  });

  it("'92129' has the expected coordinates", () => {
    const coord = getCoordinatesFromZip('92129');
    expect(coord).toEqual({ lat: 32.9584, lng: -117.1253 });
  });
});