web-cad/frontend/src/plugins/builtin/core-modify/index.ts

/**
 * core-modify – Built-in V2-Plugin.
 *
 * Werkzeuge:
 * - select (A3): Klick-Auswahl mit Shift/Ctrl
 * - hatch (A4.5): Schraffur via doc.updateElement
 * - move/copy (A4.6): selektionsbasiert, Basis→Ziel
 * - rotate/scale/mirror (A4.7): gleiche Selektions-Konvention,
 *   Legacy-Transform-Mathematik aus handleModifyMove übernommen
 *
 * Alle Commits laufen über CADDocument → kollaborativ korrektes Undo.
 */
import type { PluginV2, ToolExtensionV2 } from '../../types';
import type { FullToolContext } from '../../types';
import type { CADElement } from '../../../types/cad.types';
import {
  moveElement,
  rotateElement,
  scaleElement,
  mirrorElement,
  angleBetween,
  distance,
  offsetElement,
  trimElement,
  extendElement,
  filletElements,
} from '../../../tools/modification/geometry';
import type { Pt } from '../../../tools/modification/geometry';

const uid = (prefix: string): string =>
  `${prefix}_${Date.now().toString(36)}_${Math.random().toString(36).slice(2, 9)}`;

// ─────────────────────────────────────────────────────────────
// select (Task A3 – Pilot)
// ─────────────────────────────────────────────────────────────
export const selectTool: ToolExtensionV2 = {
  manifest: {
    id: 'select',
    label: 'Auswahl',
    icon: '\u2196',
    ribbonTab: 'canvas',
    tags: ['basic'],
    description: 'Elemente anklicken zum Auswählen',
  },
  optionsSchema: [],
  handlers: {
    down(e, ctx) {
      const bridge = (ctx as FullToolContext).selection;
      if (!bridge) return;
      const additive = e.shift;
      const subtractive = e.ctrl;
      const hit = bridge.hitTest(e.world.x, e.world.y, 5);
      if (!hit) {
        if (!additive && !subtractive) bridge.setIds([]);
        return;
      }
      let ids = new Set(bridge.getIds());
      if (subtractive) {
        ids.delete(hit.id);
      } else {
        ids.add(hit.id);
        if (!additive) ids = new Set([hit.id]);
      }
      bridge.setIds(Array.from(ids));
      ctx.setStatus(`Selektion: ${ids.size} Element(e)`);
    },
  },
};

// ─────────────────────────────────────────────────────────────
// hatch (Task A4.5)
// ─────────────────────────────────────────────────────────────
export const hatchTool: ToolExtensionV2 = {
  manifest: {
    id: 'hatch', label: 'Schraffur', icon: '\u2593', ribbonTab: 'format', tags: ['pro'],
    description: 'Geschlossenes Element anklicken zum Schraffieren',
  },
  optionsSchema: [
    { key: 'hatchPattern', label: 'Muster', type: 'select', options: [
      { value: 'lines', label: 'Linien' },
      { value: 'cross', label: 'Kreuz' },
    ] },
    { key: 'hatchSpacing', label: 'Abstand', type: 'number', min: 2, max: 40 },
  ],
  handlers: {
    down(e, ctx) {
      const c = ctx as FullToolContext;
      const bridge = c.selection;
      if (!bridge || !c.doc) return;
      const hit = bridge.hitTest(e.world.x, e.world.y, 5);
      if (!hit || !['rect', 'circle', 'polygon'].includes(hit.type)) {
        ctx.setStatus('Schraffur: nur rect/circle/polygon');
        return;
      }
      const pattern = (c.options.hatchPattern as string | undefined) ?? 'lines';
      const spacing = (c.options.hatchSpacing as number | undefined) ?? 8;
      c.doc.updateElement(hit.id, {
        properties: { hatch: true, hatchPattern: pattern, hatchSpacing: spacing },
      });
      ctx.setStatus(`Schraffur auf ${hit.id} (${pattern})`);
    },
  },
};

// ─────────────────────────────────────────────────────────────
// Move/Copy (Task A4.6)
// ─────────────────────────────────────────────────────────────
let modBasePoint: Pt | null = null;

function makeMoveCopyTool(mode: 'move' | 'copy'): ToolExtensionV2 {
  const label = mode === 'move' ? 'Verschieben' : 'Kopieren';
  return {
    manifest: {
      id: mode,
      label,
      icon: mode === 'move' ? '\u27a4' : '\u29c9',
      ribbonTab: 'canvas',
      tags: ['basic'],
      description: `${label}: Auswahl treffen, dann Basis\u2192Ziel klicken`,
    },
    optionsSchema: [],
    handlers: {
      down(e, ctx) {
        const c = ctx as FullToolContext;
        if (!c.doc || !c.selection) return;
        if (!modBasePoint) {
          const ids = c.selection.getIds();
          if (ids.length === 0) {
            const hit = c.selection.hitTest(e.world.x, e.world.y, 5);
            if (!hit) {
              ctx.setStatus(`${label}: zuerst Element(e) auswählen`);
              return;
            }
            c.selection.setIds([hit.id]);
          }
          modBasePoint = e.world;
          ctx.setStatus(`${label}: Zielklick zum ${mode === 'move' ? 'Verschieben' : 'Kopieren'} (${c.selection.getIds().length} Elemente)`);
          return;
        }
        const dx = e.world.x - modBasePoint.x;
        const dy = e.world.y - modBasePoint.y;
        const ids = c.selection.getIds();
        c.doc.transact(() => {
          for (const id of ids) {
            const el = c.doc!.getElement(id);
            if (!el) continue;
            if (mode === 'move') {
              c.doc!.updateElement(id, { x: el.x + dx, y: el.y + dy });
            } else {
              c.doc!.addElement({
                ...el,
                id: uid('cp'),
                x: el.x + dx,
                y: el.y + dy,
              });
            }
          }
        });
        ctx.setStatus(`${label}: ${ids.length} Element(e), \u0394(${dx.toFixed(0)}, ${dy.toFixed(0)})`);
        modBasePoint = null;
      },
      cancel(ctx) {
        modBasePoint = null;
        ctx.setStatus(`${label} abgebrochen`);
      },
    },
  };
}
export const moveTool: ToolExtensionV2 = makeMoveCopyTool('move');
export const copyTool: ToolExtensionV2 = makeMoveCopyTool('copy');

// ─────────────────────────────────────────────────────────────
// Rotate / Scale / Mirror (Task A4.7)
// Konventionen exakt aus Legacy handleModifyMove:
// - rotate: Pivot = Zentrum des ERSTEN selektierten Elements,
//   Δwinkel = angleBetween(pivot,zweitKlick) − angleBetween(pivot,basis)
// - scale: Faktor = dist(pivot,zweitKlick) / dist(pivot,basis)
// - mirror: Spiegelachse = Linie basis→zweitKlick
// Klick-progressiv: Commit beim ZWEITEN down (Arc-Lektion).
// ─────────────────────────────────────────────────────────────
let transformBase: Pt | null = null;

function makeTransformTool(mode: 'rotate' | 'scale' | 'mirror'): ToolExtensionV2 {
  const labels = { rotate: 'Rotieren', scale: 'Skalieren', mirror: 'Spiegeln' } as const;
  const iconMap = { rotate: '\u21bb', scale: '\u2922', mirror: '\u21c6' } as const;
  return {
    manifest: {
      id: mode,
      label: labels[mode],
      icon: iconMap[mode],
      ribbonTab: 'canvas',
      tags: ['pro'],
      description: `${labels[mode]}: Auswahl treffen, dann Basis\u2192Referenz klicken`,
    },
    optionsSchema: [],
    handlers: {
      down(e, ctx) {
        const c = ctx as FullToolContext;
        if (!c.doc || !c.selection) return;
        if (!transformBase) {
          if (c.selection.getIds().length === 0) {
            const hit = c.selection.hitTest(e.world.x, e.world.y, 5);
            if (!hit) {
              ctx.setStatus(`${labels[mode]}: zuerst Element(e) auswählen`);
              return;
            }
            c.selection.setIds([hit.id]);
          }
          transformBase = e.world;
          ctx.setStatus(`${labels[mode]}: Referenzklick zum Anwenden (${c.selection.getIds().length} Elemente)`);
          return;
        }
        // Zweiter Klick → Commit auf ALLE selektierten Elemente, EINE Transaktion
        const base = transformBase;
        const ids = c.selection.getIds();
        const first = c.doc.getElement(ids[0]);
        if (!first) { transformBase = null; return; }
        const pivot = { x: first.x, y: first.y };
        c.doc.transact(() => {
          for (const id of ids) {
            const el = c.doc!.getElement(id);
            if (!el) continue;
            let next: CADElement;
            if (mode === 'rotate') {
              const delta = angleBetween(pivot, e.world) - angleBetween(pivot, base);
              next = rotateElement(el, pivot.x, pivot.y, delta);
            } else if (mode === 'scale') {
              const sd = distance(pivot, base);
              const cd = distance(pivot, e.world);
              const factor = sd > 0 ? cd / sd : 1;
              next = scaleElement(el, pivot.x, pivot.y, factor, factor);
            } else {
              next = mirrorElement(el, base.x, base.y, e.world.x, e.world.y);
            }
            c.doc!.updateElement(id, {
              x: next.x, y: next.y,
              width: next.width, height: next.height,
              properties: next.properties,
            });
          }
        });
        ctx.setStatus(`${labels[mode]}: ${ids.length} Element(e)`);
        transformBase = null;
      },
      move(e, ctx) {
        // Live-Vorschau am ersten selektierten Element (Legacy previewElement)
        const c = ctx as FullToolContext;
        if (!transformBase || !c.selection || !c.doc) return;
        const ids = c.selection.getIds();
        if (ids.length === 0) return;
        const first = c.doc.getElement(ids[0]);
        if (!first) return;
        const pivot = { x: first.x, y: first.y };
        let next: CADElement;
        if (mode === 'rotate') {
          const delta = angleBetween(pivot, e.world) - angleBetween(pivot, transformBase);
          next = rotateElement(first, pivot.x, pivot.y, delta);
        } else if (mode === 'scale') {
          const sd = distance(pivot, transformBase);
          const cd = distance(pivot, e.world);
          const f = sd > 0 ? cd / sd : 1;
          next = scaleElement(first, pivot.x, pivot.y, f, f);
        } else {
          next = mirrorElement(first, transformBase.x, transformBase.y, e.world.x, e.world.y);
        }
        ctx.setPreview?.(next);
      },
      cancel(ctx) {
        transformBase = null;
        ctx.setPreview?.(null);
        ctx.setStatus(`${labels[mode]} abgebrochen`);
      },
    },
  };
}
export const rotateTool: ToolExtensionV2 = makeTransformTool('rotate');
export const scaleTool: ToolExtensionV2 = makeTransformTool('scale');
export const mirrorTool: ToolExtensionV2 = makeTransformTool('mirror');

// ─────────────────────────────────────────────────────────────
// Array rect / polar (Task D-Extensions):
// Vervielfältigt die aktuelle Selektion in einem Raster bzw. im Kreis.
// Klick 1: Basis-/Zentrumspunkt. Klick 2: Commit.
// rect: Options rows, cols, dx, dy (Abstände).
// polar: Options count, optional angleSum (Default 360).
// Jede Aktion = EINE Transaktion → 1 Undo-Schritt.
// ─────────────────────────────────────────────────────────────
let arrayBase: Pt | null = null;

function makeArrayTool(mode: 'array-rect' | 'array-polar'): ToolExtensionV2 {
  const labels = { 'array-rect': 'Array Rect', 'array-polar': 'Array Polar' } as const;
  return {
    manifest: {
      id: mode,
      label: labels[mode],
      icon: mode === 'array-rect' ? '\u25a6' : '\u273b',
      ribbonTab: 'canvas',
      tags: ['pro'],
      description: `${labels[mode]}: Auswahl treffen, dann Basis\u2192Ziel klicken`,
    },
    optionsSchema:
      mode === 'array-rect'
        ? [
            { key: 'rows', label: 'Zeilen', type: 'number', min: 1, max: 50 },
            { key: 'cols', label: 'Spalten', type: 'number', min: 1, max: 50 },
            { key: 'dx', label: 'Abstand X', type: 'number', min: 1 },
            { key: 'dy', label: 'Abstand Y', type: 'number', min: 1 },
          ]
        : [
            { key: 'count', label: 'Anzahl', type: 'number', min: 2, max: 100 },
          ],
    handlers: {
      down(e, ctx) {
        const c = ctx as FullToolContext;
        if (!c.doc || !c.selection) return;
        if (!arrayBase) {
          if (c.selection.getIds().length === 0) {
            const hit = c.selection.hitTest(e.world.x, e.world.y, 5);
            if (!hit) {
              ctx.setStatus(`${labels[mode]}: zuerst Element(e) auswählen`);
              return;
            }
            c.selection.setIds([hit.id]);
          }
          arrayBase = e.world;
          ctx.setStatus(`${labels[mode]}: Zielklick zum Anwenden (${c.selection.getIds().length} Elemente)`);
          return;
        }
        // Zweiter Klick → Commit
        const ids = c.selection.getIds();
        const base = arrayBase;
        c.doc.transact(() => {
          if (mode === 'array-rect') {
            const rows = (c.options.rows as number | undefined) ?? 3;
            const cols = (c.options.cols as number | undefined) ?? 3;
            const dx = (c.options.dx as number | undefined) ?? 50;
            const dy = (c.options.dy as number | undefined) ?? 50;
            for (const id of ids) {
              const el = c.doc!.getElement(id);
              if (!el) continue;
              for (let r = 0; r < rows; r++) {
                for (let col = 0; col < cols; col++) {
                  if (r === 0 && col === 0) continue; // Original überspringen
                  c.doc!.addElement({
                    ...el,
                    id: uid('arr'),
                    x: el.x + col * dx,
                    y: el.y + r * dy,
                  });
                }
              }
            }
          } else {
            const count = (c.options.count as number | undefined) ?? 6;
            // Zentrum = Basispunkt
            for (const id of ids) {
              const el = c.doc!.getElement(id);
              if (!el) continue;
              for (let i = 1; i < count; i++) {
                const angle = (2 * Math.PI * i) / count;
                const cx = base.x;
                const cy = base.y;
                const cos = Math.cos(angle);
                const sin = Math.sin(angle);
                // Position rotieren um Zentrum:
                const relX = el.x - cx;
                const relY = el.y - cy;
                c.doc!.addElement({
                  ...el,
                  id: uid('arr'),
                  x: cx + relX * cos - relY * sin,
                  y: cy + relX * sin + relY * cos,
                });
              }
            }
          }
        });
        ctx.setStatus(`${labels[mode]}: ${ids.length} Element(e) vervielfältigt`);
        arrayBase = null;
      },
      cancel(ctx) {
        arrayBase = null;
        ctx.setStatus(`${labels[mode]} abgebrochen`);
      },
    },
  };
}
export const arrayRectTool: ToolExtensionV2 = makeArrayTool('array-rect');
export const arrayPolarTool: ToolExtensionV2 = makeArrayTool('array-polar');

// ─────────────────────────────────────────────────────────────
// Trim / Extend / Fillet (Task A4.10) — baut auf BUG-2-reparierter
// findIntersection-Geometrie (B2). Legacy-Ablauf:
// - trim/extend: Klick1=Boundary, Klick2=Ziel → Ziel wird angepasst
// - fillet:      Klick1+Klick2 = zwei Elemente → Paar wird angepasst
// Jede Operation committed in EINER Transaktion.
// ─────────────────────────────────────────────────────────────
let twoPickBoundary: CADElement | null = null;
let twoPickFirst: CADElement | null = null;

function make2PickGeometryTool(
  mode: 'trim' | 'extend' | 'fillet',
  filletRadius: number,
): ToolExtensionV2 {
  const labels = { trim: 'Trimmen', extend: 'Verlängern', fillet: 'Fillet' } as const;
  return {
    manifest: {
      id: mode,
      label: labels[mode],
      icon: mode === 'fillet' ? '\u23dc' : '\u2717',
      ribbonTab: 'canvas',
      tags: ['pro'],
      description: `${labels[mode]}: ${mode === 'fillet' ? 'zwei' : 'Kante, dann'} Element(e) anklicken`,
    },
    optionsSchema: [],
    handlers: {
      down(e, ctx) {
        const c = ctx as FullToolContext;
        if (!c.doc || !c.selection) return;
        const hit = c.selection.hitTest(e.world.x, e.world.y, 5);
        if (!hit) return;

        if (mode === 'fillet') {
          if (!twoPickFirst) {
            twoPickFirst = hit;
            ctx.setStatus(`Fillet: zweites Element wählen`);
            return;
          }
          // Zweiter Pick → Paar-Commit
          const second = hit;
          const pair = filletElements(twoPickFirst, second, filletRadius);
          if (!pair) {
            ctx.setStatus('Fillet: kein Schnittpunkt gefunden');
            twoPickFirst = null;
            return;
          }
          const idA = twoPickFirst.id;
          const idB = second.id;
          c.doc.transact(() => {
            c.doc!.updateElement(idA, {
              x: pair[0].x, y: pair[0].y,
              width: pair[0].width, height: pair[0].height,
              properties: pair[0].properties,
            });
            c.doc!.updateElement(idB, {
              x: pair[1].x, y: pair[1].y,
              width: pair[1].width, height: pair[1].height,
              properties: pair[1].properties,
            });
          });
          ctx.setStatus(`Fillet angewendet (${idA}, ${idB})`);
          twoPickFirst = null;
          return;
        }

        // trim/extend: Boundary dann Ziel
        if (!twoPickBoundary) {
          twoPickBoundary = hit;
          ctx.setStatus(`${labels[mode]}: jetzt das zu bearbeitende Element wählen`);
          return;
        }
        const target = hit;
        const fn = mode === 'trim' ? trimElement : extendElement;
        const result = fn(target, twoPickBoundary);
        if (!result) {
          ctx.setStatus(`${labels[mode]}: keine Schnittmenge mit der Kante`);
          twoPickBoundary = null;
          return;
        }
        c.doc.transact(() => {
          c.doc!.updateElement(target.id, {
            x: result.x, y: result.y,
            width: result.width, height: result.height,
            properties: result.properties,
          });
        });
        ctx.setStatus(`${labels[mode]} auf ${target.id} angewendet`);
        twoPickBoundary = null;
      },
      cancel(ctx) {
        twoPickBoundary = null;
        twoPickFirst = null;
        ctx.setStatus(`${labels[mode]} abgebrochen`);
      },
    },
  };
}
export const trimTool: ToolExtensionV2 = make2PickGeometryTool('trim', 0);
export const extendTool: ToolExtensionV2 = make2PickGeometryTool('extend', 0);
export const filletTool: ToolExtensionV2 = make2PickGeometryTool('fillet', 5);
// Einzelnklick auf Element löscht es sofort (kein up/Bestätigung).
// Jetzt via doc.deleteElements → undo-fähig.
// ─────────────────────────────────────────────────────────────
export const deleteTool: ToolExtensionV2 = {
  manifest: {
    id: 'delete', label: 'Löschen', icon: '\u2715', ribbonTab: 'canvas', tags: ['basic'],
    description: 'Element anklicken zum Löschen',
  },
  optionsSchema: [],
  handlers: {
    down(e, ctx) {
      const c = ctx as FullToolContext;
      if (!c.doc || !c.selection) return;
      const ids = c.selection.getIds();
      if (ids.length > 0) {
        // Selektion vorhanden → alles selektierte löschen
        c.doc.deleteElements(ids);
        c.selection.setIds([]);
        ctx.setStatus(`${ids.length} Element(e) gelöscht`);
        return;
      }
      // Sonst: direkter Klick-Treffer
      const hit = c.selection.hitTest(e.world.x, e.world.y, 5);
      if (!hit) return;
      c.doc.deleteElements([hit.id]);
      ctx.setStatus(`Gelöscht: ${hit.id}`);
    },
  },
};

// ─────────────────────────────────────────────────────────────
// Offset (Task A4.8) — nutzt die BUG-3-reparierte offsetElement-
// Signatur mit Seitenparameter; Legacy-Ablauf:
// Klick1 = Element wählen, Klick2 = Richtung+Distanz → NEUES Element.
// ─────────────────────────────────────────────────────────────
let offsetSource: CADElement | null = null;
let offsetBase: Pt | null = null;

export const offsetTool: ToolExtensionV2 = {
  manifest: {
    id: 'offset', label: 'Versatz', icon: '\u2937', ribbonTab: 'canvas', tags: ['pro'],
    description: 'Element anklicken, dann seitlichen Versatz klicken',
  },
  optionsSchema: [],
  handlers: {
    down(e, ctx) {
      const c = ctx as FullToolContext;
      if (!c.doc || !c.selection) return;
      if (!offsetSource) {
        const hit = c.selection.hitTest(e.world.x, e.world.y, 5);
        if (!hit) return;
        offsetSource = hit;
        offsetBase = e.world;
        ctx.setStatus(`Offset: Element ${hit.id} gewählt – Versatz klicken`);
        return;
      }
      // Zweiter Klick: Distanz + Seite (Kreuzprodukt für Linien, Radius sonst)
      const src = c.doc.getElement(offsetSource.id);
      if (!src) { offsetSource = null; offsetBase = null; return; }
      const dist = Math.hypot(e.world.x - offsetBase!.x, e.world.y - offsetBase!.y);
      let side: 1 | -1 = 1;
      if (src.type === 'line' && src.properties.x1 !== undefined && src.properties.y1 !== undefined) {
        const p1x = src.properties.x1 as number;
        const p1y = src.properties.y1 as number;
        const p2x = src.properties.x2 as number;
        const p2y = src.properties.y2 as number;
        side = (p2x - p1x) * (e.world.y - p1y) - (p2y - p1y) * (e.world.x - p1x) >= 0 ? 1 : -1;
      } else if ((src.type === 'circle' || src.type === 'arc') && src.properties.radius !== undefined) {
        side = Math.hypot(e.world.x - src.x, e.world.y - src.y) >= (src.properties.radius as number) ? 1 : -1;
      }
      const next = offsetElement(src, dist, side);
      let newEl: CADElement | null = null;
      c.doc.transact(() => {
        newEl = { ...next, id: uid('off') };
        c.doc!.addElement(newEl!);
      });
      ctx.setStatus(`Offset erstellt (${(newEl as unknown as CADElement).id})`);
      offsetSource = null;
      offsetBase = null;
    },
    cancel(ctx) {
      offsetSource = null;
      offsetBase = null;
      ctx.setStatus('Offset abgebrochen');
    },
  },
};

/** V2-Plugin: Kern-Bearbeitungswerkzeuge. */
export const coreModifyPlugin: PluginV2 = {
  manifest: {
    id: 'core-modify',
    name: 'Bearbeiten (Kern)',
    version: '1.6.0',
    author: 'web-cad team',
    description: 'Auswahl, Schraffur, Move/Copy/Rotate/Scale/Mirror/Delete/Offset/Trim/Extend/Fillet/Arrays (V2).',
    category: 'tools',
    enabledByDefault: true,
  },
  tools: [selectTool, hatchTool, moveTool, copyTool, rotateTool, scaleTool, mirrorTool, deleteTool, offsetTool, trimTool, extendTool, filletTool, arrayRectTool, arrayPolarTool],
};