import assert from 'node:assert/strict';
import test from 'node:test';

import { buildScreenshotRequest, ValidationError } from './validation.js';

test('buildScreenshotRequest accepts supported screenshot parameters', () => {
  const result = buildScreenshotRequest({
    lat: '51.5074',
    lon: '-0.1278',
    zoom: '12.5',
    tab: 'properties',
    og: '1',
    path: '/invite/abc123',
    filter: ['Last known price:100000:500000', 'Total floor area (sqm):50:150'],
    school: 'primary:good:2:1:10',
    crime: ['Burglary (avg/yr):0:5', 'Vehicle crime (avg/yr):0:10'],
    voteShare: ['% Labour:30:55', '% Conservative:10:35'],
    ethnicity: ['% White:10:80', '% South Asian:5:35'],
    amenityDistance: [
      'Distance%20to%20nearest%20amenity%20(Park)%20(km):0:0.4',
      'Distance%20to%20nearest%20amenity%20(Caf%C3%A9)%20(km):0:1.5',
    ],
    transportDistance: 'Distance%20to%20nearest%20amenity%20(Bus%20stop)%20(km):0:0.3',
    amenityCount2km: 'Number%20of%20amenities%20(Cafe)%20within%202km:2:8',
    amenityCount5km: 'Number%20of%20amenities%20(Park)%20within%205km:1:20',
    poi: 'supermarket',
    tt: 'transit:kings-cross:Kings Cross:b:0:30',
    share: 'abc123',
    pc: 'SW1A 1AA',
  });

  assert.equal(result.pagePath, '/invite/abc123');
  assert.equal(result.qs.get('lat'), '51.5074');
  assert.equal(result.qs.get('lon'), '-0.1278');
  assert.equal(result.qs.get('zoom'), '12.5');
  assert.equal(result.qs.get('tab'), 'properties');
  assert.deepEqual(result.qs.getAll('filter'), [
    'Last known price:100000:500000',
    'Total floor area (sqm):50:150',
  ]);
  assert.deepEqual(result.qs.getAll('school'), ['primary:good:2:1:10']);
  assert.deepEqual(result.qs.getAll('crime'), [
    'Burglary (avg/yr):0:5',
    'Vehicle crime (avg/yr):0:10',
  ]);
  assert.deepEqual(result.qs.getAll('voteShare'), ['% Labour:30:55', '% Conservative:10:35']);
  assert.deepEqual(result.qs.getAll('ethnicity'), ['% White:10:80', '% South Asian:5:35']);
  assert.deepEqual(result.qs.getAll('amenityDistance'), [
    'Distance%20to%20nearest%20amenity%20(Park)%20(km):0:0.4',
    'Distance%20to%20nearest%20amenity%20(Caf%C3%A9)%20(km):0:1.5',
  ]);
  assert.deepEqual(result.qs.getAll('transportDistance'), [
    'Distance%20to%20nearest%20amenity%20(Bus%20stop)%20(km):0:0.3',
  ]);
  assert.deepEqual(result.qs.getAll('amenityCount2km'), [
    'Number%20of%20amenities%20(Cafe)%20within%202km:2:8',
  ]);
  assert.deepEqual(result.qs.getAll('amenityCount5km'), [
    'Number%20of%20amenities%20(Park)%20within%205km:1:20',
  ]);
  assert.equal(result.qs.get('share'), 'abc123');
  assert.equal(result.qs.get('pc'), 'SW1A 1AA');
});

test('buildScreenshotRequest safely passes through future dashboard parameters', () => {
  const result = buildScreenshotRequest({
    futureFilter: ['alpha:1:2', 'beta:3:4'],
    viewMode_2: 'postcode',
  });

  assert.deepEqual(result.qs.getAll('futureFilter'), ['alpha:1:2', 'beta:3:4']);
  assert.equal(result.qs.get('viewMode_2'), 'postcode');
});

test('buildScreenshotRequest rejects invalid numeric values', () => {
  assert.throws(
    () => buildScreenshotRequest({ lat: '91', lon: '-0.1', zoom: '12' }),
    ValidationError,
  );
  assert.throws(
    () => buildScreenshotRequest({ lat: '51abc', lon: '-0.1', zoom: '12' }),
    ValidationError,
  );
});

test('buildScreenshotRequest rejects unsafe paths', () => {
  assert.throws(() => buildScreenshotRequest({ path: '//example.com' }), ValidationError);
  assert.throws(() => buildScreenshotRequest({ path: '/../../etc/passwd' }), ValidationError);
});

test('buildScreenshotRequest limits repeated parameters', () => {
  assert.throws(
    () =>
      buildScreenshotRequest({
        filter: Array.from({ length: 41 }, (_, index) => `Feature ${index}:0:1`),
      }),
    ValidationError,
  );
});

test('buildScreenshotRequest rejects control characters', () => {
  assert.throws(() => buildScreenshotRequest({ filter: 'Feature:\u0000:1' }), ValidationError);
});

test('buildScreenshotRequest rejects reserved screenshot service parameters', () => {
  assert.throws(() => buildScreenshotRequest({ screenshot: '0' }), ValidationError);
  assert.throws(() => buildScreenshotRequest({ _auth: '1' }), ValidationError);
});

test('buildScreenshotRequest rejects unsafe passthrough parameter names', () => {
  assert.throws(() => buildScreenshotRequest({ 'filter[]': 'Feature:0:1' }), ValidationError);
});