import type { Channel, ConsoleChunk, ReadResult } from './types.ts';
/**
 * Storage for one job's console.
 *
 * The role this contract fills is a stream: ordered append, read from a
 * position, and block until there is more. Memory satisfies it with an
 * array, Redis Streams with XADD/XRANGE/XREAD BLOCK. A home qualifies by
 * offering those primitives, never by brand.
 *
 * The store knows nothing about jobs ending. Termination is an ordinary
 * CONTROL chunk, so a blocked reader is woken by it like any other
 * append, and every home can express it.
 */
export interface ConsoleStore {
    /** Add a chunk and return it with its assigned seq. */
    append(channel: Channel, data: Uint8Array): Promise<ConsoleChunk>;
    /**
     * Read chunks at or after a cursor.
     *
     * Returns the chunks, the cursor to pass next time, and whether the
     * requested cursor had already been dropped by retention. A reader
     * that fell behind resumes at the oldest retained chunk and is told
     * so, rather than silently losing bytes.
     */
    readFrom(seq: number, limit?: number): Promise<ReadResult>;
    /**
     * Whether `close` has run.
     *
     * Readers loop, so releasing them once is not enough to end a follow:
     * they re-read, find no CONTROL chunk, and wait again. They check this
     * to tell "more may arrive" from "this console is discarded".
     */
    readonly closed: boolean;
    /**
     * Resolve once the console holds a chunk after `seq`.
     *
     * Resolves immediately on a closed store, which is what keeps a reader
     * that re-arms from parking on a console nobody will write to again.
     */
    wait(seq: number): Promise<void>;
    /**
     * Release the store's resources.
     *
     * This is not "the job ended": that is the CONTROL chunk. Closing
     * releases any blocked reader so nothing hangs on a discarded console.
     */
    close(): Promise<void>;
}
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