import { AcApContext } from '../../app';
import { AcEdCommand } from '../../editor';
/**
 * Command to copy selected entities by cloning and translating them.
 *
 * Supported AutoCAD-like workflow:
 * 1) Select entities (or reuse preselection),
 * 2) Specify base point or choose `Displacement` / `Mode` / `Multiple`,
 * 3) Specify placement point, or create an evenly spaced array,
 * 4) Append cloned copies without modifying the originals.
 */
export declare class AcApCopyCmd extends AcEdCommand {
    private static _defaultMode;
    /**
     * Creates the COPY command and marks it as a review-mode command.
     */
    constructor();
    /**
     * Adds one localized keyword entry to a point/keyword prompt.
     *
     * @param prompt - Prompt instance that should expose the keyword.
     * @param key - Translation key suffix describing which keyword to add.
     */
    private addKeyword;
    /**
     * Computes the vector from a copy base point to a target point.
     *
     * @param basePoint - Copy base point.
     * @param targetPoint - Destination point selected by the user.
     * @returns Translation vector that moves a clone from base to target.
     */
    private computeDisplacement;
    /**
     * Scales a displacement for one copy in a repeated copy/array operation.
     *
     * @param displacement - Raw placement displacement from the base point.
     * @param factor - One-based copy index.
     * @param copyCount - Total number of copies to generate.
     * @param fitMode - Whether indexed copies should be distributed across the full span.
     * @returns Displacement assigned to the requested copy index.
     */
    private scaleDisplacement;
    /**
     * Clones source entities and translates each clone batch into its final position.
     *
     * @param sourceEntities - Entities to duplicate.
     * @param displacement - Raw placement displacement from base point to end point.
     * @param copyCount - Number of translated copy batches to produce.
     * @param fitMode - Whether batches should be distributed evenly across the full displacement.
     * @returns Newly cloned and transformed entities ready to append to model space.
     */
    private buildCopies;
    /**
     * Prompts the user to choose between single-copy and repeated-copy behavior.
     *
     * @param currentMode - Mode shown as the current default in the prompt.
     * @returns Selected mode, the current mode on empty input, or `undefined` on cancel/error.
     */
    private promptCopyMode;
    /**
     * Collects array placement settings for the `Array` COPY option.
     *
     * The routine first asks for the number of items, then asks for the final
     * placement point. If the user chooses `Fit`, the returned placement marks
     * copies as evenly distributed across the overall span.
     *
     * @param context - Current application/document context.
     * @param sourceEntities - Entities used to build the transient preview.
     * @param basePoint - Array start point shared by all placements.
     * @returns Array placement settings, or `undefined` when input is canceled.
     */
    private promptArrayPlacement;
    /**
     * Runs the placement loop that repeatedly creates copies until the command ends.
     *
     * @param context - Current application/document context.
     * @param sourceEntities - Entities selected for copying.
     * @param basePoint - Base/displacement point used by the current copy session.
     * @param copyMode - Whether the loop should stop after one placement or continue.
     * @param useDisplacementPrompt - Whether prompt text should describe displacement instead of second point placement.
     */
    private executeCopyLoop;
    /**
     * Executes COPY using AutoCAD-like selection, base-point, and placement prompts.
     *
     * Existing selection is reused when available; otherwise the command requests
     * a new selection. The command then resolves copy mode/base point options and
     * appends cloned entities into model space for each accepted placement.
     *
     * @param context - Current application/document context.
     */
    execute(context: AcApContext): Promise<void>;
}
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