/**
 * Fingerprint Types
 *
 * Types for monthly chunk fingerprinting used for deduplication.
 */
/**
 * A monthly chunk of messages with its fingerprint.
 * Used for deduplication: if two chunks have the same fingerprint,
 * they contain the same messages and can be skipped on re-upload.
 */
export interface MonthlyChunk {
    /** First day of the month (UTC, time set to 00:00:00) */
    readonly monthStart: Date;
    /** ISO string format: "2024-01" for easier serialization */
    readonly monthKey: string;
    /** Total number of messages in this month */
    readonly messageCount: number;
    /** SHA-256 fingerprint of the chunk */
    readonly fingerprint: string;
    /** Timestamp of the first message in this month */
    readonly firstMessageAt: Date;
    /** Timestamp of the last message in this month */
    readonly lastMessageAt: Date;
    /** The actual messages (only present during processing, not persisted) */
    readonly messages?: readonly import('../types/parser').ParsedMessage[];
}
/**
 * Result of analyzing an upload for deduplication.
 */
export interface DeduplicationPlan {
    /** Total number of monthly chunks in the upload */
    readonly totalChunks: number;
    /** Number of new chunks to process */
    readonly newChunks: number;
    /** Number of chunks already processed (duplicates) */
    readonly duplicateChunks: number;
    /** Total messages to process (from new chunks) */
    readonly messagesToProcess: number;
    /** Total messages skipped (from duplicate chunks) */
    readonly messagesSkipped: number;
    /** The new chunks that need processing */
    readonly chunksToProcess: readonly MonthlyChunk[];
    /** The fingerprints of duplicate chunks (for logging/debugging) */
    readonly duplicateFingerprints: readonly string[];
}
/**
 * Configuration for fingerprint generation.
 */
export interface FingerprintConfig {
    /**
     * Number of messages to sample from the start of each month.
     * Default: 10
     */
    readonly sampleSize?: number;
    /**
     * Whether to include message count in fingerprint.
     * Default: true (recommended for detecting partial exports)
     */
    readonly includeCount?: boolean;
}
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