/**
 * data-structure-typed
 *
 * @author Pablo Zeng
 * @copyright Copyright (c) 2022 Pablo Zeng <zrwusa@gmail.com>
 * @license MIT License
 */
import type { BinaryTreeDeleteResult, BinaryTreeOptions, BSTNOptKeyOrNode, EntryCallback, IterationType, RBTNColor, TreeCounterOptions } from '../../types';
import { BSTOptions } from '../../types';
import { BSTNode } from './bst';
import { IBinaryTree } from '../../interfaces';
import { RedBlackTree, RedBlackTreeNode } from './red-black-tree';
/**
 * RB-tree node with an extra 'count' field; keeps parent/child links.
 * @remarks Time O(1), Space O(1)
 * @template K
 * @template V
 */
export declare class TreeCounterNode<K = any, V = any> extends RedBlackTreeNode<K, V> {
    parent?: TreeCounterNode<K, V>;
    /**
     * Create a tree counter node.
     * @remarks Time O(1), Space O(1)
     * @param key - Key of the node.
     * @param [value] - Value associated with the key (ignored in map mode).
     * @param [count] - Initial count for this node (default 1).
     * @param color - Initial color ('RED' or 'BLACK').
     * @returns New TreeCounterNode instance.
     */
    constructor(key: K, value?: V, count?: number, color?: RBTNColor);
    _left?: TreeCounterNode<K, V> | null | undefined;
    /**
     * Get the left child pointer.
     * @remarks Time O(1), Space O(1)
     * @returns Left child node, or null/undefined.
     */
    get left(): TreeCounterNode<K, V> | null | undefined;
    /**
     * Set the left child and update its parent pointer.
     * @remarks Time O(1), Space O(1)
     * @param v - New left child node, or null/undefined.
     * @returns void
     */
    set left(v: TreeCounterNode<K, V> | null | undefined);
    _right?: TreeCounterNode<K, V> | null | undefined;
    /**
     * Get the right child pointer.
     * @remarks Time O(1), Space O(1)
     * @returns Right child node, or null/undefined.
     */
    get right(): TreeCounterNode<K, V> | null | undefined;
    /**
     * Set the right child and update its parent pointer.
     * @remarks Time O(1), Space O(1)
     * @param v - New right child node, or null/undefined.
     * @returns void
     */
    set right(v: TreeCounterNode<K, V> | null | undefined);
}
/**
 * Red-Black Tree–based counter map (key → value with per-node count). Supports O(log N) updates and map-like mode.
 * @remarks Time O(1), Space O(1)
 * @template K
 * @template V
 * @template R
 */
export declare class TreeCounter<K = any, V = any, R extends object = object> extends RedBlackTree<K, V, R> implements IBinaryTree<K, V, R> {
    /**
     * Create a TreeCounter and optionally bulk-insert items.
     * @remarks Time O(N log N), Space O(N)
     * @param [keysNodesEntriesOrRaws] - Iterable of keys/nodes/entries/raw items to insert.
     * @param [options] - Options for TreeCounter (comparator, reverse, map mode).
     * @returns New TreeCounter instance.
     */
    constructor(keysNodesEntriesOrRaws?: Iterable<K | TreeCounterNode<K, V> | [K | null | undefined, V | undefined] | null | undefined | R>, options?: TreeCounterOptions<K, V, R>);
    protected _count: number;
    /**
     * Get the total aggregate count across all nodes.
     * @remarks Time O(1), Space O(1)
     * @returns Total count.
     */
    get count(): number;
    /**
     * Compute the total count by traversing the tree (sums node.count).
     * @remarks Time O(N), Space O(H)
     * @returns Total count recomputed from nodes.
     */
    getComputedCount(): number;
    _createNode(key: K, value?: V, color?: RBTNColor, count?: number): TreeCounterNode<K, V>;
    /**
     * Type guard: check whether the input is a TreeCounterNode.
     * @remarks Time O(1), Space O(1)
     * @returns True if the value is a TreeCounterNode.
     */
    isNode(keyNodeOrEntry: K | TreeCounterNode<K, V> | [K | null | undefined, V | undefined] | null | undefined): keyNodeOrEntry is TreeCounterNode<K, V>;
    /**
     * Insert or increment a node and update aggregate count.
     * @remarks Time O(log N), Space O(1)
     * @param keyNodeOrEntry - Key, node, or [key, value] entry to insert.
     * @param [value] - Value when a bare key is provided (ignored in map mode).
     * @param [count] - How much to increase the node's count (default 1).
     * @returns True if inserted/updated; false if ignored.
     */
    add(keyNodeOrEntry: K | TreeCounterNode<K, V> | [K | null | undefined, V | undefined] | null | undefined, value?: V, count?: number): boolean;
    /**
     * Delete a node (or decrement its count) and rebalance if needed.
     * @remarks Time O(log N), Space O(1)
     * @param keyNodeOrEntry - Key, node, or [key, value] entry identifying the node.
     * @param [ignoreCount] - If true, remove the node regardless of its count.
     * @returns Array of deletion results including deleted node and a rebalance hint when present.
     */
    delete(keyNodeOrEntry: K | TreeCounterNode<K, V> | [K | null | undefined, V | undefined] | null | undefined, ignoreCount?: boolean): BinaryTreeDeleteResult<TreeCounterNode<K, V>>[];
    /**
     * Remove all nodes and reset aggregate counters.
     * @remarks Time O(N), Space O(1)
     * @returns void
     */
    clear(): void;
    /**
     * Rebuild the tree into a perfectly balanced form using in-order nodes.
     * @remarks Time O(N), Space O(N)
     * @param [iterationType] - Traversal style to use when constructing the balanced tree.
     * @returns True if rebalancing succeeded (tree not empty).
     */
    perfectlyBalance(iterationType?: IterationType): boolean;
    /**
     * Create a new TreeCounter by mapping each [key, value] entry.
     * @remarks Time O(N log N), Space O(N)
     * @template MK
     * @template MV
     * @template MR
     * @param callback - Function mapping (key, value, index, tree) → [newKey, newValue].
     * @param [options] - Options for the output tree.
     * @param [thisArg] - Value for `this` inside the callback.
     * @returns A new TreeCounter with mapped entries.
     */
    map<MK = K, MV = V, MR extends object = object>(callback: EntryCallback<K, V | undefined, [MK, MV]>, options?: Partial<BinaryTreeOptions<MK, MV, MR>>, thisArg?: unknown): TreeCounter<MK, MV, MR>;
    /**
     * Deep copy this tree, preserving map mode and aggregate counts.
     * @remarks Time O(N), Space O(N)
     * @returns A deep copy of this tree.
     */
    clone(): this;
    /**
     * (Protected) Create an empty instance of the same concrete class.
     * @remarks Time O(1), Space O(1)
     * @template TK
     * @template TV
     * @template TR
     * @param [options] - Optional constructor options for the like-kind instance.
     * @returns An empty like-kind instance.
     */
    protected _createInstance<TK = K, TV = V, TR extends object = R>(options?: Partial<BSTOptions<TK, TV, TR>>): this;
    /**
     * (Protected) Create a like-kind instance and seed it from an iterable.
     * @remarks Time O(N log N), Space O(N)
     * @template TK
     * @template TV
     * @template TR
     * @param iter - Iterable used to seed the new tree.
     * @param [options] - Options merged with the current snapshot.
     * @returns A like-kind TreeCounter built from the iterable.
     */
    protected _createLike<TK = K, TV = V, TR extends object = R>(iter?: Iterable<TK | BSTNode<TK, TV> | [TK | null | undefined, TV | undefined] | null | undefined | TR>, options?: Partial<BSTOptions<TK, TV, TR>>): TreeCounter<TK, TV, TR>;
    /**
     * (Protected) Normalize input into a node plus its effective value and count.
     * @remarks Time O(1), Space O(1)
     * @param keyNodeOrEntry - Key, node, or [key, value] entry.
     * @param [value] - Value used when a bare key is provided.
     * @param [count] - Count increment to apply (default 1).
     * @returns Tuple [node, value] where node may be undefined.
     */
    protected _keyValueNodeOrEntryToNodeAndValue(keyNodeOrEntry: K | TreeCounterNode<K, V> | [K | null | undefined, V | undefined] | null | undefined, value?: V, count?: number): [TreeCounterNode<K, V> | undefined, V | undefined];
    /**
     * (Protected) Swap keys/values/counters between the source and destination nodes.
     * @remarks Time O(1), Space O(1)
     * @param srcNode - Source node (or key) whose properties will be moved.
     * @param destNode - Destination node (or key) to receive properties.
     * @returns Destination node after swap, or undefined.
     */
    protected _swapProperties(srcNode: BSTNOptKeyOrNode<K, TreeCounterNode<K, V>>, destNode: BSTNOptKeyOrNode<K, TreeCounterNode<K, V>>): TreeCounterNode<K, V> | undefined;
    /**
     * (Protected) Replace one node by another and adjust counters accordingly.
     * @remarks Time O(1), Space O(1)
     * @param oldNode - Node being replaced.
     * @param newNode - Replacement node.
     * @returns The new node after replacement.
     */
    protected _replaceNode(oldNode: TreeCounterNode<K, V>, newNode: TreeCounterNode<K, V>): TreeCounterNode<K, V>;
}