/**
 * Teams emoji shortcut-to-ID resolution.
 *
 * Fetches the emoji catalog dynamically from the Teams CDN at runtime
 * and builds a shortcut→ID map in memory. This avoids hardcoding 1100+
 * entries and keeps the map up-to-date as Teams adds new emojis.
 *
 * The CDN URL pattern is:
 *   https://statics.teams.cdn.office.net/evergreen-assets/personal-expressions/v1/metadata/{version}/{locale}.json
 *
 * The {version} is a content hash embedded in the Teams client config.
 * Multiple known versions are tried in order (newest first).
 * If all fetches fail, resolveReactionKey falls back to returning the
 * lowercased input (standard reactions like "like", "heart", "laugh"
 * have id === shortcut and work without any map).
 */
/**
 * Reset internal state — exposed for test isolation only.
 */
export declare function resetEmojiMap(): void;
/**
 * Initialize the emoji shortcut→ID map by fetching from the Teams CDN.
 *
 * Safe to call multiple times — only the first call triggers a fetch.
 * If the fetch fails, resolveReactionKey will fall back to returning
 * the lowercased input (which works for standard reactions).
 */
export declare function initializeEmojiMap(): Promise<void>;
/**
 * Resolve a user-friendly reaction name to the Teams emoji ID.
 *
 * Accepts shortcuts (e.g. "horse"), emoji IDs (e.g. "1f40e_horse"),
 * or standard reaction names (e.g. "like"). Returns the emoji ID that
 * the Teams Chat Service API expects.
 *
 * Resolution order:
 * 1. If the emoji map has been fetched, looks up the input as a shortcut.
 * 2. Otherwise, returns the lowercased input (works for standard reactions
 *    where id === shortcut, e.g. "like", "heart", "laugh").
 */
export declare function resolveReactionKey(input: string): string;
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