import type { EncoderChannelMap } from "./config.js";
/**
 * Initializes the persistent assignment layer from the contents of encoder-channels.json. Called
 * once at startup by initializeEncoderModule(). Runtime assignments start empty.
 * @param initial - The channel-to-encoder-index map loaded from encoder-channels.json.
 */
export declare function initializeAssignments(initial: EncoderChannelMap): void;
/**
 * Assigns a channel key to an encoder index at runtime. Overrides any persistent assignment for
 * this key. Called when the user tunes an encoder via the WebUI or API.
 * @param channelKey   - The PrismCast channel key (e.g., "cnn").
 * @param encoderIndex - The encoder index (0-based).
 */
export declare function assignChannel(channelKey: string, encoderIndex: number): void;
/**
 * Removes a runtime assignment for a channel key. After this call, the channel falls back to its
 * persistent assignment (if any), or flows through the normal HLS pipeline. Called when the user
 * releases an encoder via the WebUI or API.
 * @param channelKey - The PrismCast channel key to unassign.
 */
export declare function unassignChannel(channelKey: string): void;
/**
 * Removes all runtime assignments for a given encoder index. Used when an encoder is released
 * wholesale (rather than per-channel). Persistent assignments for those channels are also cleared.
 * @param encoderIndex - The encoder index to clear.
 */
export declare function clearEncoderAssignments(encoderIndex: number): void;
/**
 * Returns the encoder index assigned to the given channel key, or undefined if the channel is
 * not assigned to any encoder. Runtime assignments take precedence over persistent assignments.
 * @param channelKey - The PrismCast channel key to look up.
 */
export declare function getAssignmentForChannel(channelKey: string): number | undefined;
/**
 * Returns all channel keys currently assigned to the given encoder index, from both runtime and
 * persistent layers (deduplicated, runtime takes precedence).
 * @param encoderIndex - The encoder index to query.
 */
export declare function getChannelsForEncoder(encoderIndex: number): string[];
/**
 * Returns a merged view of all current assignments (both persistent and runtime) as a plain
 * object. Runtime assignments override persistent ones for the same key. This is used by the
 * route middleware's getEncoderChannels() getter.
 */
export declare function getAllAssignments(): EncoderChannelMap;
/**
 * Returns true if any assignments exist (persistent or runtime).
 */
export declare function hasAnyAssignments(): boolean;