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//! Wraps the memory file system implementation - this has been
//! enhanced to support mounting file systems, shared static files,
//! readonly files, etc...

#![allow(dead_code)]
#![allow(unused)]
use std::collections::HashMap;
use std::io::prelude::*;
use std::io::SeekFrom;
use std::io::{self};
use std::path::{Path, PathBuf};
use std::result::Result as StdResult;
use std::sync::atomic::AtomicU32;
use std::sync::Arc;
use std::sync::Mutex;
#[allow(unused_imports, dead_code)]
use tracing::{debug, error, info, trace, warn};

use crate::mem_fs;
use crate::Result as FsResult;
use crate::*;

#[derive(Debug, Default, Clone)]
pub struct TmpFileSystem {
    fs: mem_fs::FileSystem,
}

impl TmpFileSystem {
    pub fn new() -> Self {
        Self::default()
    }

    pub fn new_open_options_ext(&self) -> &mem_fs::FileSystem {
        self.fs.new_open_options_ext()
    }

    pub fn union(&self, other: &Arc<dyn FileSystem + Send + Sync>) {
        self.fs.union(other)
    }

    pub fn mount(
        &self,
        src_path: PathBuf,
        other: &Arc<dyn FileSystem + Send + Sync>,
        dst_path: PathBuf,
    ) -> Result<()> {
        self.fs.mount(src_path, other, dst_path)
    }
}

impl FileSystem for TmpFileSystem {
    fn read_dir(&self, path: &Path) -> Result<ReadDir> {
        self.fs.read_dir(path)
    }

    fn create_dir(&self, path: &Path) -> Result<()> {
        self.fs.create_dir(path)
    }

    fn remove_dir(&self, path: &Path) -> Result<()> {
        self.fs.remove_dir(path)
    }

    fn rename(&self, from: &Path, to: &Path) -> Result<()> {
        self.fs.rename(from, to)
    }

    fn metadata(&self, path: &Path) -> Result<Metadata> {
        self.fs.metadata(path)
    }

    fn symlink_metadata(&self, path: &Path) -> Result<Metadata> {
        self.fs.symlink_metadata(path)
    }

    fn remove_file(&self, path: &Path) -> Result<()> {
        self.fs.remove_file(path)
    }

    fn new_open_options(&self) -> OpenOptions {
        self.fs.new_open_options()
    }
}