pub mod device;
pub mod disc_image;

use thiserror::Error;

#[derive(Debug, Error)]
pub enum VfsError {
    #[error("I/O error: {0}")]
    Io(#[from] std::io::Error),

    #[error("Invalid format: {0}")]
    InvalidFormat(String),

    #[error("File not found: {0}")]
    NotFound(String),
}

/// A virtual filesystem entry (file or directory).
#[derive(Debug)]
pub struct VfsEntry {
    pub name: String,
    pub is_directory: bool,
    pub size: u64,
    pub offset: u64,
}

/// Trait for VFS device implementations (XISO, STFS, host path, etc.)
pub trait VfsDevice: Send + Sync {
    fn name(&self) -> &str;
    fn list_root(&self) -> Result<Vec<VfsEntry>, VfsError>;
    fn read_file(&self, path: &str) -> Result<Vec<u8>, VfsError>;
    fn stat(&self, path: &str) -> Result<VfsEntry, VfsError>;
}