import type { WebEngineEditCommand } from "./web-engine";

type NonMeshCommand<T extends WebEngineEditCommand["type"]> = Extract<WebEngineEditCommand, { type: T }>;

/** Typed constructors for curve, font, volume and Grease Pencil editing. */
export const nonMeshGeometryCommands = Object.freeze({
  createCurve(name: string, controlPoints: readonly number[], cyclic = false, resolution = 12): NonMeshCommand<"createCurve"> {
    return { type: "createCurve", curveType: "CURVE", name, controlPoints: [...controlPoints], cyclic, resolution };
  },
  setCurveControlPoints(dataId: string, controlPoints: readonly number[], splineOffsets?: readonly number[], resolution?: number): NonMeshCommand<"setCurveControlPoints"> {
    return { type: "setCurveControlPoints", dataId, controlPoints: [...controlPoints], ...(splineOffsets ? { splineOffsets: [...splineOffsets] } : {}), ...(resolution === undefined ? {} : { resolution }) };
  },
  setFontBody(dataId: string, body: string): NonMeshCommand<"setFontBody"> {
    return { type: "setFontBody", dataId, body };
  },
  setFontProperties(dataId: string, properties: NonMeshCommand<"setFontProperties">["properties"]): NonMeshCommand<"setFontProperties"> {
    return { type: "setFontProperties", dataId, properties: { ...properties } };
  },
  setVolumeProperties(dataId: string, sourcePath: string, displayDensity: number, interpolation: "NEAREST" | "LINEAR", stepSize: number): NonMeshCommand<"setVolumeProperties"> {
    return { type: "setVolumeProperties", dataId, sourcePath, displayDensity, interpolation, stepSize };
  },
  setMetaballElements(dataId: string, elements: NonMeshCommand<"setMetaballElements">["elements"]): NonMeshCommand<"setMetaballElements"> {
    return { type: "setMetaballElements", dataId, elements: elements.map((element) => ({ ...element, position: [...element.position] as [number, number, number], scale: [...element.scale] as [number, number, number] })) };
  },
  createGreasePencilLayer(dataId: string, name: string): NonMeshCommand<"createGreasePencilLayer"> {
    return { type: "createGreasePencilLayer", dataId, name };
  },
  removeGreasePencilLayer(dataId: string, layerId: string): NonMeshCommand<"removeGreasePencilLayer"> {
    return { type: "removeGreasePencilLayer", dataId, layerId };
  },
  clearGreasePencilFrame(dataId: string, layerId: string, frame: number, baseRevision?: number): NonMeshCommand<"setGreasePencilStrokes"> {
    return { type: "setGreasePencilStrokes", dataId, layerId, frame, ...(baseRevision === undefined ? {} : { baseRevision }), strokes: [] };
  },
} satisfies Record<string, (...args: never[]) => WebEngineEditCommand>);