/**
 * Task G1 – Layout-Datenmodell: Yjs Map layoutId → LayoutDefinition.
 *
 * LayoutDefinition: { id, name, viewport: { center: {x,y}, scale },
 * frameBlockRef? }. CRUD über CADDocument, undo-getrackt, Persistence
 * läuft automatisch über die Yjs-Doc-Serialisierung (drawing json).
 */
import { describe, it, expect } from 'vitest';
import { CADDocument } from '../src/kernel/document/CADDocument';
import { createInMemoryDoc } from './helpers/inMemoryDoc';

function mkDoc(): CADDocument {
  const { ydoc } = createInMemoryDoc();
  return new CADDocument(ydoc);
}

const LAYOUT = {
  id: 'layout-1',
  name: 'A4 Plan',
  viewport: { center: { x: 100, y: 50 }, scale: 0.5 },
  frameBlockRef: 'frame-a4',
};

describe('G1: Layout-CRUD', () => {
  it('addLayout + getLayout: Layout landet mit allen Feldern in der Map', () => {
    const doc = mkDoc();
    doc.addLayout(LAYOUT);
    const loaded = doc.getLayout('layout-1');
    expect(loaded).toBeDefined();
    expect(loaded!.name).toBe('A4 Plan');
    expect(loaded!.viewport.center.x).toBe(100);
    expect(loaded!.viewport.center.y).toBe(50);
    expect(loaded!.viewport.scale).toBe(0.5);
    expect(loaded!.frameBlockRef).toBe('frame-a4');
  });

  it('getAllLayouts liefert Array; leer ohne Layouts', () => {
    const doc = mkDoc();
    expect(doc.getAllLayouts()).toHaveLength(0);
    doc.addLayout(LAYOUT);
    doc.addLayout({ ...LAYOUT, id: 'layout-2', name: 'A3 Plan' });
    const all = doc.getAllLayouts();
    expect(all).toHaveLength(2);
    expect(all.map((l) => l.name)).toContain('A3 Plan');
  });

  it('updateLayout ändert name und viewport shallow (id/struktur bleibt)', () => {
    const doc = mkDoc();
    doc.addLayout(LAYOUT);
    doc.updateLayout('layout-1', { name: 'A4 geändert', viewport: { center: { x: 0, y: 0 }, scale: 2 } });
    const loaded = doc.getLayout('layout-1');
    expect(loaded!.name).toBe('A4 geändert');
    expect(loaded!.viewport.scale).toBe(2);
    expect(loaded!.frameBlockRef).toBe('frame-a4'); // unverändert erhalten
  });

  it('deleteLayout entfernt Layout still (unbekannte ID kein Fehler)', () => {
    const doc = mkDoc();
    doc.addLayout(LAYOUT);
    doc.deleteLayout('layout-1');
    expect(doc.getLayout('layout-1')).toBeUndefined();
    expect(() => doc.deleteLayout('gibts-nicht')).not.toThrow();
  });
});

describe('G1: Undo-Integration', () => {
  it('Undo entfernt hinzugefügtes Layout wieder', () => {
    const doc = mkDoc();
    doc.addLayout(LAYOUT);
    expect(doc.getLayout('layout-1')).toBeDefined();
    doc.undo();
    expect(doc.getLayout('layout-1')).toBeUndefined();
    doc.redo();
    expect(doc.getLayout('layout-1')).toBeDefined();
  });

  it('Layout-Undo ist EIN Schritt (nicht mit Element-Transaktion vermischt)', () => {
    const doc = mkDoc();
    doc.addLayout(LAYOUT);
    doc.deleteLayout('layout-1');
    // Zwei Schritte: undo stellt Löschung wieder her
    doc.undo();
    expect(doc.getLayout('layout-1')).toBeDefined();
    doc.undo();
    expect(doc.getLayout('layout-1')).toBeUndefined();
  });
});