import { DiffType } from 'api-smart-diff';
import { DiffBlockData } from '../diff-builder/common';
/** Pre-computed index entry for a block */
export interface BlockIndexEntry {
    block: DiffBlockData;
    parentId: string | null;
    depth: number;
    /** Aggregate classification counts (mirrors block.diffs) */
    counts: {
        breaking: number;
        nonBreaking: number;
        annotation: number;
        unclassified: number;
    };
    /** Direct diff type if block has a change */
    diffType?: DiffType;
    /** All ancestor block IDs from root to parent */
    ancestorIds: string[];
}
/** Pre-computed index for the entire block tree */
export interface BlockTreeIndex {
    /** blockId → entry (O(1) lookup) */
    byId: Map<string, BlockIndexEntry>;
    /** All container block IDs (have children), for filter operations */
    containerIds: string[];
    /** Container blocks grouped by which diff types they contain */
    containersByMatchingType: Map<DiffType, Set<string>>;
    /** Container blocks that match NO diff type (no changes at all) */
    unchangedContainers: Set<string>;
    /** All blocks with direct changes, sorted by document order */
    changedBlocks: {
        blockId: string;
        diffType: DiffType;
        block: DiffBlockData;
    }[];
    /** Changed blocks grouped by type, sorted by document order */
    changedByType: Map<DiffType, {
        blockId: string;
        block: DiffBlockData;
    }[]>;
}
/**
 * Build the block tree index. Called once after buildDiffBlock().
 * O(N) where N = total nodes in the tree.
 */
export declare function buildBlockTreeIndex(blocks: DiffBlockData[]): BlockTreeIndex;