'use strict';

const test = require('node:test');
const assert = require('node:assert/strict');

const DashboardApi = require('../../src/specificClass.js');

test('subtreeChanged: null diff → always regen (safe default for cold start)', () => {
  const api = new DashboardApi({});
  assert.equal(api.subtreeChanged(null, new Set(['a', 'b'])), true);
  assert.equal(api.subtreeChanged(undefined, new Set(['a', 'b'])), true);
});

test('subtreeChanged: empty diff arrays → no regen needed', () => {
  const api = new DashboardApi({});
  const diff = { added: [], changed: [], removed: [], rewired: [], linked: [], flowChanged: [] };
  assert.equal(api.subtreeChanged(diff, new Set(['a', 'b'])), false);
});

test('subtreeChanged: id in added → regen', () => {
  const api = new DashboardApi({});
  const diff = { added: ['x', 'b'], changed: [], removed: [], rewired: [] };
  assert.equal(api.subtreeChanged(diff, new Set(['a', 'b'])), true);
});

test('subtreeChanged: id in changed → regen', () => {
  const api = new DashboardApi({});
  const diff = { added: [], changed: ['a'], removed: [], rewired: [] };
  assert.equal(api.subtreeChanged(diff, new Set(['a', 'b'])), true);
});

test('subtreeChanged: only unrelated ids → no regen', () => {
  const api = new DashboardApi({});
  const diff = { added: ['z'], changed: ['y'], removed: ['x'], rewired: ['w'] };
  assert.equal(api.subtreeChanged(diff, new Set(['a', 'b'])), false);
});

test('subtreeChanged: tab id in diff but not in subtree → no regen', () => {
  // Tab id over-triggering avoidance: when an unrelated tab changes, its
  // tab id lands in changed/added but should not affect this dashboardAPI.
  const api = new DashboardApi({});
  const diff = { added: [], changed: ['unrelated_tab'], removed: [], rewired: [] };
  assert.equal(api.subtreeChanged(diff, new Set(['dashboardApiId', 'childA'])), false);
});

test('subtreeIdsFor: includes dashboardAPI id + child id + grandchild ids', () => {
  const api = new DashboardApi({});
  const grandchild = {
    config: { general: { id: 'gc-1' }, functionality: { softwareType: 'measurement' } },
  };
  const grandchildEntry = { child: grandchild, position: 'downstream', softwareType: 'measurement' };
  const child = {
    config: { general: { id: 'child-1' }, functionality: { softwareType: 'pumpingStation' } },
    childRegistrationUtils: {
      registeredChildren: new Map([['gc-1', grandchildEntry]]),
    },
  };
  const ids = api.subtreeIdsFor('dApi-1', child);
  assert.equal(ids.has('dApi-1'), true);
  assert.equal(ids.has('child-1'), true);
  assert.equal(ids.has('gc-1'), true);
  assert.equal(ids.size, 3);
});

test('subtreeIdsFor: handles child with no grandchildren', () => {
  const api = new DashboardApi({});
  const child = {
    config: { general: { id: 'child-1' }, functionality: { softwareType: 'measurement' } },
  };
  const ids = api.subtreeIdsFor('dApi-1', child);
  assert.equal(ids.size, 2);
  assert.ok(ids.has('dApi-1') && ids.has('child-1'));
});