import { ExecutionResult, FlushReason } from './types.js';
/** Options for the {@link HmOog.constructor HmOog constructor}. */
export interface OogOptions {
    /**
     * The path to the shell.txt
     * @default (the Hackmud data folder of your system)/shell.txt
     */
    shellPath: string;
    /**
     * If the Hackmud shell should be focused on startup.
     * @default false
     */
    shouldFocusShell: boolean;
}
/** The class that manages OOG activity. */
export declare class HmOog {
    private readonly shellPath;
    private readonly shouldFocusShell;
    private readonly fileWatcher;
    private didInit;
    private lastShellFlag;
    private unprocessedLines;
    private isInHardline;
    /**
     * @param options Initialisation options - see {@link OogOptions}
     */
    constructor(options?: Partial<OogOptions>);
    /**
     * Initialize the OOG. Must be called before any other methods!
     */
    init(): Promise<void>;
    /**
     * Wait until the shell is flushed.
     *
     * @returns why the shell was flushed
     */
    waitForFlush(): Promise<FlushReason>;
    /**
     * Wait until the shell is flushed by a `flush` command.
     */
    waitForCommandFlush(): Promise<void>;
    /**
     * Runs the `flush` command and waits until it successfully flushed the shell.
     *
     * @param timeout=0 the maximum number of milliseconds to try flushing.
     *                  A value below 1 means no waiting.
     *
     * @returns whether or not a timeout happened.
     *
     * @remarks
     * The flush operation may be delayed by another program that's currently being executed,
     * in which case this function only returns when both the program and the flush command ran.
     */
    flush(timeout?: number): Promise<boolean>;
    /**
     * Sends a command to Hackmud and processes the result.
     *
     * @param command The command to send
     * @returns The result of the command
     * @throws TypeError if the command contains newlines
     * @throws OogExecutionError if the command couldn't be typed into Hackmud
     */
    runCommand(command: string): Promise<ExecutionResult>;
    private processOutput;
    /**
     * Sends a command to Hackmud.
     *
     * @param command The command to send
     * @returns whether the command could be typed into Hackmud
     * @throws TypeError if the command contains newlines
     */
    sendRaw(command: string): Promise<boolean>;
    /**
     * Removes and returns all shell lines yet to be processed by other methods.
     *
     * @returns a list of the raw shell output
     */
    consumeLines(): string[];
    /**
     * Get the current hardline activation status.
     */
    isHardlineActive(): boolean;
    /**
     * Enters hardline.
     *
     * @remarks
     *
     * Due to the hardline GUI, it takes *at least* 15 seconds to enter hardline!
     * If entering hardline fails, the call takes ~2s.
     * If it succeeds, it will take over 20s!
     *
     * This delay can **not** be reduced meaningfully due to the
     * `-hardline active-` message, as well as all the animations being pretty slow.
     *
     * @returns 0 if successful, otherwise how many milliseconds are left until the next hardline.
     */
    enterHardline(): Promise<number>;
    /**
     * Exits hardline.
     *
     * @remarks
     *
     * Wait five seconds after calling `kernel.hardline {dc: true}`, due to the
     * `-hardline disconnected-` message breaking parsing.
     *
     * While it could be reduced, it would also show up unexpectedly in results
     * from {@link runCommand}!
     */
    exitHardline(): Promise<void>;
    /**
     * Helper method to get the number of milliseconds left until the next hardline is available.
     *
     * @private
     */
    private getHardlineCooldown;
    /**
     * Small helper method to check if {@link init} has been run.
     *
     * @private
     * @throws OogNotInitializedError if not initialized
     */
    private assertDidInit;
    /**
     * Sends a special flag, so we can find where we last left off.
     *
     * @remarks
     *
     * The reason we need to do this is that we can't tell apart old stuff from new stuff
     * in every case. If the outputs have been exactly the same, we'd need to guesswork.
     * This completely negates the need for guessing!
     *
     * @private
     */
    private placeShellFlag;
    /**
     * Helper method that searches for the previous {@link placeShellFlag shell flag} and removes everything
     * before it, including the flag itself and its error output.
     *
     * @private
     * @param lines The lines to process
     */
    private removeOldLines;
    /**
     * Reads the actual shell.txt file and puts yet unprocessed lines into {@link unprocessedLines}.
     *
     * Removes *some* junk output like any `flush` executions.
     *
     * @private
     * @returns The reason for the last shell flush
     */
    private updateShell;
}