// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.

// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity.  If not, see <http://www.gnu.org/licenses/>.

//! Path utilities
use std::path::Path;

/// Default ethereum paths
pub mod ethereum {
	use std::path::PathBuf;

	#[cfg(target_os = "macos")]
	/// Default path for ethereum installation on Mac Os
	pub fn default() -> PathBuf {
		let mut home = ::std::env::home_dir().expect("Failed to get home dir");
		home.push("Library");
		home.push("Ethereum");
		home
	}

	#[cfg(windows)]
	/// Default path for ethereum installation on Windows
	pub fn default() -> PathBuf {
		let mut home = ::std::env::home_dir().expect("Failed to get home dir");
		home.push("AppData");
		home.push("Roaming");
		home.push("Ethereum");
		home
	}

	#[cfg(not(any(target_os = "macos", windows)))]
	/// Default path for ethereum installation on posix system which is not Mac OS
	pub fn default() -> PathBuf {
		let mut home = ::std::env::home_dir().expect("Failed to get home dir");
		home.push(".ethereum");
		home
	}

	/// Get the specific folder inside default ethereum installation
	pub fn with_default(s: &str) -> PathBuf {
		let mut pth = default();
		pth.push(s);
		pth
	}

	/// Get the specific folder inside default ethereum installation configured for testnet
	pub fn with_testnet(s: &str) -> PathBuf {
		let mut pth = default();
		pth.push("testnet");
		pth.push(s);
		pth
	}
}

/// Restricts the permissions of given path only to the owner.
#[cfg(not(windows))]
pub fn restrict_permissions_owner(file_path: &Path) -> Result<(), i32>  {
	let cstr = ::std::ffi::CString::new(file_path.to_str().unwrap()).unwrap();
	match unsafe { ::libc::chmod(cstr.as_ptr(), ::libc::S_IWUSR | ::libc::S_IRUSR) } {
		0 => Ok(()),
		x => Err(x),
	}
}

/// Restricts the permissions of given path only to the owner.
#[cfg(windows)]
pub fn restrict_permissions_owner(_file_path: &Path) -> Result<(), i32>  {
	//TODO: implement me
	Ok(())
}