import { type Aabb, type Vec2 } from "./geometry.js";
export type WallVec3 = readonly [number, number, number];
export interface WallSegment {
    from: Vec2;
    to: Vec2;
    length: number;
    angle: number;
}
export interface EnclosedFootprint {
    polygon: readonly Vec2[];
    aabb: Aabb;
    area: number;
    perimeter: number;
    closed: boolean;
}
export type RoofStyle = "hip" | "gable" | "flat";
export interface RoofPlan {
    style: RoofStyle;
    ridge: readonly [Vec2, Vec2];
    apexHeight: number;
    eaveHeight: number;
    faces: readonly (readonly WallVec3[])[];
}
export interface RoofConfig {
    style?: RoofStyle;
    eaveHeight?: number;
    pitch?: number;
    overhang?: number;
}
/** @internal */
export declare function wallSegments(points: readonly Vec2[], closed: boolean): WallSegment[];
/** @internal */
export declare function isEnclosed(points: readonly Vec2[], tolerance?: number): boolean;
/** @internal */
export declare function enclosePath(points: readonly Vec2[], tolerance?: number): readonly Vec2[];
/** @internal */
export declare function polygonArea(polygon: readonly Vec2[]): number;
/** @internal */
export declare function footprintFromWalls(points: readonly Vec2[], tolerance?: number): EnclosedFootprint | null;
/** @internal */
export declare function autoRoof(footprint: EnclosedFootprint, config?: RoofConfig): RoofPlan;
export type PaintTarget = "floor" | "wall";
export interface SurfacePaintStore {
    paint(target: PaintTarget, key: string, surface: string): void;
    clear(target: PaintTarget, key: string): void;
    get(target: PaintTarget, key: string): string | null;
    entries(target: PaintTarget): readonly (readonly [string, string])[];
    snapshot(): Record<PaintTarget, Record<string, string>>;
    restore(snapshot: Record<PaintTarget, Record<string, string>>): void;
}
/** @internal */
export declare function createSurfacePaint(): SurfacePaintStore;
/** Plain JSON state of a {@link WallDrawTool}: the drawn points and whether the loop is closed. */
export interface WallDrawToolState {
    points: Vec2[];
    closed: boolean;
}
export interface WallDrawTool {
    addPoint(point: Vec2, snap?: number): Vec2;
    undo(): void;
    close(): void;
    clear(): void;
    points(): readonly Vec2[];
    segments(): WallSegment[];
    isClosed(): boolean;
    footprint(): EnclosedFootprint | null;
    roof(config?: RoofConfig): RoofPlan | null;
    snapshot(): WallDrawToolState;
    restore(next: WallDrawToolState): void;
}
/** @internal */
export declare function createWallDrawTool(config?: {
    snap?: number;
    closeTolerance?: number;
}): WallDrawTool;
/** @internal */
export declare function wallSegmentBounds(segment: WallSegment, thickness: number): Aabb;