/**
 * Task D3 – Point/XLine/Ray: Konstruktions-Elemente.
 *
 * pointTool: Klick-Platzierer (kleiner Kreis mit point:true-Marker,
 * r=1.5 wie DXF-POINT-Import). xlineTool: 2 Klicks (Basis+Richtung),
 * sehr lange Linie in BEIDE Richtungen. rayTool: halblang (nur eine
 * Richtung). Alle mit construction:true und auf defpoints-Layer
 * (auto-angelegt falls fehlt).
 */
import { describe, it, expect, beforeEach } from 'vitest';
import { pointTool, xlineTool, rayTool } from '../src/plugins/builtin/core-drawing';
import { CADDocument } from '../src/kernel/document/CADDocument';
import { createInMemoryDoc } from './helpers/inMemoryDoc';
import type { CADElement, Pt } from '../src/types/cad.types';

function mkCtx() {
  const { ydoc } = createInMemoryDoc();
  const doc = new CADDocument(ydoc);
  const previews: (CADElement | null)[] = [];
  const statuses: string[] = [];
  const ctx: any = {
    doc,
    options: {},
    setStatus: (m: string) => statuses.push(m),
    setPreview: (el: CADElement | null) => previews.push(el),
  };
  return { ctx, doc, previews, statuses };
}

function pe(x: number, y: number): { world: Pt } {
  return { world: { x, y } } as never;
}

beforeEach(() => {
  pointTool.handlers.cancel?.({ setStatus: () => {}, setPreview: () => {} } as never);
  xlineTool.handlers.cancel?.({ setStatus: () => {}, setPreview: () => {} } as never);
  rayTool.handlers.cancel?.({ setStatus: () => {}, setPreview: () => {} } as never);
});

describe('D3: pointTool', () => {
  it('Klick platziert Kreis mit point-Marker (r=1.5, wie DXF POINT)', () => {
    const { ctx, doc } = mkCtx();
    pointTool.handlers.down!(pe(55, 66), ctx);
    const els = doc.getAllElements();
    expect(els).toHaveLength(1);
    const el = els[0];
    expect(el.type).toBe('circle');
    expect(el.x).toBe(55);
    expect(el.y).toBe(66);
    expect(el.properties.radius).toBe(1.5);
    expect(el.properties.point).toBe(true);
  });

  it('defpoints-Layer wird automatisch angelegt falls fehlt', () => {
    const { ctx, doc } = mkCtx();
    expect(doc.getLayer('defpoints')).toBeUndefined();
    pointTool.handlers.down!(pe(0, 0), ctx);
    expect(doc.getLayer('defpoints')).toBeDefined();
    expect(doc.getLayer('defpoints')!.name).toBe('defpoints');
  });

  it('Element landet auf defpoints-Layer mit construction:true', () => {
    const { ctx, doc } = mkCtx();
    pointTool.handlers.down!(pe(10, 10), ctx);
    const el = doc.getAllElements()[0];
    expect(el.layerId).toBe('defpoints');
    expect(el.properties.construction).toBe(true);
  });
});

describe('D3: xlineTool (Konstruktionslinie, beide Richtungen)', () => {
  it('2 Klicks erzeugen sehr lange Linie durch beide Punkte in BEIDE Richtungen', () => {
    const { ctx, doc } = mkCtx();
    xlineTool.handlers.down!(pe(0, 0), ctx);
    xlineTool.handlers.down!(pe(10, 10), ctx);
    const els = doc.getAllElements();
    expect(els).toHaveLength(1);
    const el = els[0];
    expect(el.type).toBe('line');
    const dx = (el.properties.x2 as number) - (el.properties.x1 as number);
    const dy = (el.properties.y2 as number) - (el.properties.y1 as number);
    // Sehr lange: Länge >> Distanz der beiden Klicks (14.14)
    expect(Math.hypot(dx, dy)).toBeGreaterThan(100000);
    // Mittelpunkt der Linie = Basispunkt
    expect((el.properties.x1 as number) + dx / 2).toBeCloseTo(0, 3);
    expect((el.properties.y1 as number) + dy / 2).toBeCloseTo(0, 3);
  });

  it('Element auf defpoints-Layer mit construction:true', () => {
    const { ctx, doc } = mkCtx();
    xlineTool.handlers.down!(pe(0, 0), ctx);
    xlineTool.handlers.down!(pe(5, 0), ctx);
    const el = doc.getAllElements()[0];
    expect(el.layerId).toBe('defpoints');
    expect(el.properties.construction).toBe(true);
  });

  it('Preview bei move nach erstem Klick', () => {
    const { ctx, previews } = mkCtx();
    xlineTool.handlers.down!(pe(0, 0), ctx);
    xlineTool.handlers.move!(pe(50, 50), ctx);
    expect(previews.length).toBeGreaterThanOrEqual(1);
  });

  it('Erster Klick ohne zweiten erzeugt NICHTS (Session-State)', () => {
    const { ctx, doc } = mkCtx();
    xlineTool.handlers.down!(pe(0, 0), ctx);
    expect(doc.getAllElements()).toHaveLength(0);
  });
});

describe('D3: rayTool (Strahl, nur EINE Richtung)', () => {
  it('2 Klicks erzeugen Linie ab Basispunkt NUR in Zugrichtung', () => {
    const { ctx, doc } = mkCtx();
    rayTool.handlers.down!(pe(0, 0), ctx);
    rayTool.handlers.down!(pe(10, 0), ctx);
    const el = doc.getAllElements()[0];
    expect(el.type).toBe('line');
    expect(el.properties.x1).toBe(0);
    expect(el.properties.y1).toBe(0);
    // Endpunkt weit in +x-Richtung
    expect((el.properties.x2 as number)).toBeGreaterThanOrEqual(100000);
    // NICHT in Gegenrichtung: x1 ist exakt der Basispunkt
    expect(el.properties.x1).toBe(0);
  });

  it('construction:true + defpoints-Layer', () => {
    const { ctx, doc } = mkCtx();
    rayTool.handlers.down!(pe(0, 0), ctx);
    rayTool.handlers.down!(pe(0, 10), ctx);
    const el = doc.getAllElements()[0];
    expect(el.layerId).toBe('defpoints');
    expect(el.properties.construction).toBe(true);
  });
});

describe('D3: Manifeste', () => {
  it('ids/ribbonTab/tags korrekt', () => {
    expect(pointTool.manifest.id).toBe('point');
    expect(xlineTool.manifest.id).toBe('xline');
    expect(rayTool.manifest.id).toBe('ray');
    for (const t of [pointTool, xlineTool, rayTool]) {
      expect(t.manifest.ribbonTab).toBe('canvas');
      expect((t.manifest.tags ?? [])).toContain('basic');
    }
  });
});