import { module, test } from 'qunit';
import { setupTest } from 'marco/tests/helpers';

module('Unit | Service | osm', function (hooks) {
  setupTest(hooks);

  test('it exists', function (assert) {
    let service = this.owner.lookup('service:osm');
    assert.ok(service);
  });

  test('normalizeOsmApiData handles nodes correctly', function (assert) {
    let service = this.owner.lookup('service:osm');
    const elements = [
      {
        id: 123,
        type: 'node',
        lat: 52.5,
        lon: 13.4,
        tags: { name: 'Test Node' },
      },
    ];

    const result = service.normalizeOsmApiData(elements, 123, 'node');

    assert.strictEqual(result.title, 'Test Node');
    assert.strictEqual(result.lat, 52.5);
    assert.strictEqual(result.lon, 13.4);
    assert.strictEqual(result.osmId, '123');
    assert.strictEqual(result.osmType, 'node');
  });

  test('normalizeOsmApiData calculates centroid for ways', function (assert) {
    let service = this.owner.lookup('service:osm');
    const elements = [
      {
        id: 456,
        type: 'way',
        nodes: [1, 2],
        tags: { name: 'Test Way' },
      },
      { id: 1, type: 'node', lat: 10, lon: 10 },
      { id: 2, type: 'node', lat: 20, lon: 20 },
    ];

    const result = service.normalizeOsmApiData(elements, 456, 'way');

    assert.strictEqual(result.title, 'Test Way');
    assert.strictEqual(result.lat, 15); // (10+20)/2
    assert.strictEqual(result.lon, 15); // (10+20)/2
    assert.strictEqual(result.osmId, '456');
    assert.strictEqual(result.osmType, 'way');
  });

  test('normalizeOsmApiData calculates centroid for relations with member nodes', function (assert) {
    let service = this.owner.lookup('service:osm');
    const elements = [
      {
        id: 789,
        type: 'relation',
        members: [
          { type: 'node', ref: 1, role: 'admin_centre' },
          { type: 'node', ref: 2, role: 'label' },
        ],
        tags: { name: 'Test Relation' },
      },
      { id: 1, type: 'node', lat: 10, lon: 10 },
      { id: 2, type: 'node', lat: 30, lon: 30 },
    ];

    const result = service.normalizeOsmApiData(elements, 789, 'relation');

    assert.strictEqual(result.title, 'Test Relation');
    assert.strictEqual(result.lat, 20); // (10+30)/2
    assert.strictEqual(result.lon, 20); // (10+30)/2
    assert.strictEqual(result.osmId, '789');
    assert.strictEqual(result.osmType, 'relation');
  });

  test('normalizeOsmApiData calculates centroid for relations with member ways', function (assert) {
    let service = this.owner.lookup('service:osm');
    /*
      Relation 999
        -> Way 888
           -> Node 1 (10, 10)
           -> Node 2 (20, 20)
    */
    const elements = [
      {
        id: 999,
        type: 'relation',
        members: [{ type: 'way', ref: 888, role: 'outer' }],
        tags: { name: 'Complex Relation' },
      },
      {
        id: 888,
        type: 'way',
        nodes: [1, 2],
      },
      { id: 1, type: 'node', lat: 10, lon: 10 },
      { id: 2, type: 'node', lat: 20, lon: 20 },
    ];

    const result = service.normalizeOsmApiData(elements, 999, 'relation');

    assert.strictEqual(result.title, 'Complex Relation');
    // It averages all nodes found. In this case, Node 1 and Node 2.
    assert.strictEqual(result.lat, 15); // (10+20)/2
    assert.strictEqual(result.lon, 15); // (10+20)/2
    assert.strictEqual(result.osmId, '999');
    assert.strictEqual(result.osmType, 'relation');
  });
});