import { CodeChunk, DiffResult, ChunkMetadata } from '../../types';
import { Change } from 'diff';
export declare class DiffEngine {
    private previousChunks;
    private currentChunks;
    private metadata;
    constructor(metadata?: Map<string, ChunkMetadata>);
    setPreviousChunks(chunks: CodeChunk[]): void;
    setCurrentChunks(chunks: CodeChunk[]): void;
    computeDiff(): DiffResult;
    private hasChunkChanged;
    computeTextDiff(oldText: string, newText: string): Change[];
    generateHash(content: string): string;
    getChunkDiff(chunkId: string): {
        old?: CodeChunk;
        new?: CodeChunk;
        diff?: Change[];
    };
    getModifiedChunksWithContext(contextLines?: number): Map<string, string>;
    private formatDiffWithContext;
    updateMetadata(chunk: CodeChunk, aiSummary?: string): void;
    getMetadata(chunkId: string): ChunkMetadata | undefined;
    getAllMetadata(): Map<string, ChunkMetadata>;
    getChangedFiles(diffResult: DiffResult): Set<string>;
    getChangeStatistics(diffResult: DiffResult): {
        added: number;
        modified: number;
        deleted: number;
        unchanged: number;
        total: number;
        filesChanged: number;
    };
}
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