import { File } from "../file.js";
import { Tag } from "../tag.js";
import { ReadStyle } from "../toolkit/types.js";
import type { IOStream } from "../toolkit/ioStream.js";
import { ItProperties } from "./itProperties.js";
/**
 * Impulse Tracker (IT) file format handler.
 *
 * Magic "IMPM" at offset 0. Title at offset 4 (26 bytes).
 * Instrument and sample names form the comment, plus an optional message.
 */
export declare class ItFile extends File {
    /** Parsed tag holding title, comment, and tracker name. */
    private _tag;
    /** Parsed audio properties, or null if not yet read. */
    private _properties;
    /**
     * Private constructor — use {@link ItFile.open} instead.
     * @param stream - The underlying I/O stream.
     */
    private constructor();
    /**
     * Open and parse an Impulse Tracker file.
     * @param stream - The I/O stream to read from.
     * @param readProperties - Whether to parse audio properties.
     * @param readStyle - Detail level for audio property parsing.
     * @returns A fully initialized {@link ItFile} instance.
     */
    static open(stream: IOStream, readProperties?: boolean, readStyle?: ReadStyle): Promise<ItFile>;
    /**
     * Check whether a stream contains an Impulse Tracker file.
     * @param stream - The stream to inspect.
     * @returns `true` if the stream begins with the "IMPM" magic bytes.
     */
    static isSupported(stream: IOStream): Promise<boolean>;
    /** Returns the tag for this file. */
    tag(): Tag;
    /** Returns the audio properties, or `null` if not parsed. */
    audioProperties(): ItProperties | null;
    /**
     * Write the current tag data back to the file.
     * @returns `true` on success, `false` if the file is read-only or data is invalid.
     */
    save(): Promise<boolean>;
    /**
     * Parse the IT file header, instrument/sample names, and optional message.
     * @param readProperties - Whether to populate audio properties.
     * @param readStyle - Detail level for audio property parsing.
     */
    private read;
}
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