export interface OutlookMessageData {
    messageId: string;
    conversationId: string | null;
    fromAddress: string | null;
    fromName: string | null;
    toAddresses: string[];
    ccAddresses: string[];
    subject: string | null;
    bodyText: string;
    receivedDateTime: string;
    accountId: string;
}
export interface ThreadGroup {
    rootKey: string;
    messages: OutlookMessageData[];
    /** All distinct lowercased addresses from From/To/Cc across the thread. */
    addresses: string[];
}
export interface DispatchResult {
    threadsDispatched: number;
    threadsSkipped: number;
    unresolvedAddresses: string[];
}
/**
 * Group messages into threads by Graph conversationId. A message with no
 * conversationId falls back to its own messageId key, so it stands alone
 * rather than colliding with other conversation-less messages.
 */
export declare function groupByThread(messages: OutlookMessageData[]): ThreadGroup[];
/** Thread JSON shape consumed by the `email` normaliser: [{from:{name,email},date,bodyText}]. */
export declare function buildThreadJson(thread: ThreadGroup): {
    from: {
        name: string | null;
        email: string | null;
    };
    date: string;
    bodyText: string;
}[];
export declare function dispatchOutlookMessagesToConversationArchive(messages: OutlookMessageData[]): Promise<DispatchResult>;
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