/**
 * Declaration file for the npm module "libmount".
 *
 * This module provides TypeScript declarations for interacting with the "libmount" library,
 *
 * @remarks
 * The "libmount" library typically includes functionality for mounting and unmounting filesystems,
 * managing mount points, and querying mounted filesystems.
 *
 * @see {@link https://www.npmjs.com/package/libmount}
 */
declare module "libmount" {
  /**
   * Mount a raw image.
   *
   * @param img A Raw image.
   * @param options Mount options.
   * @returns A mounted disk.
   */
  export function mount(img: Uint8Array, options?: MountOptions): Disk;

  /**
   * Represents the mount options.
   */
  export type MountOptions = {
    /**
     * The codepage used to decode and encode FAT short names. Default codepage is cp1252.
     */
    codepage?: Codepage;

    /**
     * Disk partition to mount.
     */
    partition?: Partition;
  };

  /**
   * Represents a codepage.
   */
  export interface Codepage {
    /**
     * Decodes an array of single-byte characters into a string.
     */
    decode(array: Uint8Array): string;

    /**
     * Encodes a string into an array of single-byte characters.
     */
    encode(text: string, defaultCharCode?: number): Uint8Array;

    /**
     * Convert a wide character code to a single-byte character code if possible.
     */
    encodeChar(wcCode: number): number | null;
  }

  /**
   * Represents a disk.
   */
  export interface Disk {
    /**
     * Retrieves the file system associated with the disk if detected.
     * Returning null may indicate the disk is either empty, partitioned, or lacks a known file system.
     * @returns The file system object if available.
     */
    getFileSystem(): FileSystem | null;

    /**
     * Retrieves an array of MBR partitions on the disk.
     * The array may be empty if the disk has no partitions (e.g., like a floppy disk, or empty disk).
     * @returns An array of MBR partitions.
     */
    getPartitions(): Partition[];
  }

  /**
   * Represents a file system.
   */
  export interface FileSystem {
    /**
     * Retrieves the name of the file system.
     * @returns The name of the file system (e.g. FAT12, FAT16, FAT32).
     */
    getName(): string;

    /**
     * Retrieves volume information associated with the file system.
     * @returns Volume.
     */
    getVolume(): Volume;

    /**
     * Retrieves the root directory of the file system.
     * @returns The root directory file object.
     */
    getRoot(): File;
  }

  /**
   * Represents a file or directory in a file system.
   */
  export interface File {
    /**
     * Retrieves the name of the file.
     * @returns The name of the file.
     */
    getName(): string;

    /**
     * Retrieves the short name (8.3 format) of the file.
     * @returns The short name of the file.
     */
    getShortName(): string;

    /**
     * Retrieves the absolute path of the file.
     * @returns The absolute path of the file.
     */
    getAbsolutePath(): string;

    /**
     * Checks if the file is a regular file.
     * @returns True if the file is a regular file (not a directory), otherwise false.
     */
    isRegularFile(): boolean;

    /**
     * Checks if the file is a directory.
     * @returns True if the file is a directory (or the root directory), otherwise false.
     */
    isDirectory(): boolean;

    /**
     * Retrieves the size of the file or the total size of all files in a directory.
     * @returns The file or directory size in bytes.
     */
    length(): number;

    /**
     * Retrieves the size on disk of the current file object.
     * @returns The file object size in bytes.
     */
    getSizeOnDisk(): number;

    /**
     * Retrieves the last modified timestamp of the file.
     * @returns The last modified timestamp of the file.
     */
    lastModified(): Date | null;

    /**
     * Retrieves the creation timestamp of the file.
     * @returns The creation timestamp of the file.
     */
    creationTime(): Date | null;

    /**
     * Retrieves the last access timestamp of the file.
     * @returns The last access timestamp of the file.
     */
    lastAccessTime(): Date | null;

    /**
     * Finds the first file matching the given predicate.
     * @param predicate The predicate function.
     * @returns The first file matching the predicate, or null if not a directory or nothing found.
     */
    findFirst(predicate: (file: File) => boolean): File | null;

    /**
     * Finds all files matching the given predicate.
     * @param predicate The predicate function.
     * @returns An array of files matching the predicate or null if not a directory.
     */
    findAll(predicate: (file: File) => boolean): File[] | null;

    /**
     * Lists all files in the directory.
     * @returns An array of files in the directory, or null if not a directory.
     */
    listFiles(): File[] | null;

    /**
     * Retrieves the data content of the file.
     * @returns The data content of the file, or null if not a regular file.
     */
    getData(): Uint8Array | null;

    /**
     * Set the content to the current file.
     * @param data File content.
     * @returns This file if success, null otherwise.
     */
    setData(data: Uint8Array): File | null;

    /**
     * Deletes the file or directory recursive. After deletion, this file becomes unusable.
     * Deleting the root directory deletes all files recursive.
     */
    delete(): void;

    /**
     * Retrieves a file object given its path relative to the current file.
     * @param path The path to the file.
     * @returns The File located at the specified path, otherwise null.
     */
    getFile(relativePath: string): File | null;

    /**
     * Creates a file at the specified path, including any necessary parent directories.
     * If the file already exists, returns the existing file.
     *
     * @param relativePath Relative path where the file should be created.
     * @returns The file located at the specified path if successfully created or already exists, otherwise null.
     */
    makeFile(relativePath: string): File | null;

    /**
     * Creates a directory at the specified path, including any necessary parent directories.
     * If the directory already exists, returns the existing directory.
     *
     * @param relativePath Relative path where the directory should be created.
     * @returns The file located at the specified path if successfully created or already exists, otherwise null.
     */
    makeDir(relativePath: string): File | null;

    /**
     * Moves the current file to the destination path, creating any necessary parent directories.
     * - If `dest` points to an existing directory, the current file is moved into that directory.
     * - If `dest` does not exist, the current file is renamed to `dest`.
     * Root directory cannot be moved or renamed.
     * @param dest Absolute or relative to the current file path where the current file should be moved or renamed to.
     * @returns The new file object at the destination path if successfully moved or renamed, otherwise null.
     */
    moveTo(dest: string): File | null;
  }

  /**
   * Represents a file system volume
   */
  export interface Volume {
    /**
     * The volume label.
     */
    getLabel(): string | null;
    setLabel(label: string | null): void;
    /**
     * OEM Name Identifier. Typically this is some indication of what system formatted the volume.
     */
    getOEMName(): string | null;
    setOEMName(oemName: string | null): void;
    /**
     * The volume serial number.
     */
    getId(): number;
    setId(id: number): void;
    /**
     * The size of a cluster on the volume in bytes.
     */
    getSizeOfCluster(): number;
    /**
     * Total count of clusters on the volume.
     */
    getCountOfClusters(): number;
    /**
     * Number of free clusters available for allocation.
     */
    getFreeClusters(): number;
  }

  /**
   * Represents the disk partition information.
   */
  export type Partition = {
    /**
     * Flag indicating whether the partition is active.
     */
    active: boolean;

    /**
     * Partition Type (e.g. 0xE for FAT).
     */
    type: number;

    /**
     * Offset (in bytes) from the beginning of the disk to the start of the partition.
     */
    begin: number;

    /**
     * Offset (in bytes) from the beginning of the disk to the end of the partition.
     */
    end: number;
  };
}