// This file is part of Substrate.

// Copyright (C) 2018-2020 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0

// This program 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.

// This program 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 this program. If not, see <https://www.gnu.org/licenses/>.

use sc_service::config::BasePath;
use std::path::PathBuf;
use structopt::StructOpt;

/// Shared parameters used by all `CoreParams`.
#[derive(Debug, StructOpt)]
pub struct SharedParams {
	/// Specify the chain specification.
	///
	/// It can be one of the predefined ones (dev, local, or staging) or it can be a path to a file with
	/// the chainspec (such as one exported by the `build-spec` subcommand).
	#[structopt(long, value_name = "CHAIN_SPEC")]
	pub chain: Option<String>,

	/// Specify the development chain.
	#[structopt(long, conflicts_with_all = &["chain"])]
	pub dev: bool,

	/// Specify custom base path.
	#[structopt(long, short = "d", value_name = "PATH", parse(from_os_str))]
	pub base_path: Option<PathBuf>,

	/// Sets a custom logging filter. Syntax is <target>=<level>, e.g. -lsync=debug.
	///
	/// Log levels (least to most verbose) are error, warn, info, debug, and trace.
	/// By default, all targets log `info`. The global log level can be set with -l<level>.
	#[structopt(short = "l", long, value_name = "LOG_PATTERN")]
	pub log: Vec<String>,
}

impl SharedParams {
	/// Specify custom base path.
	pub fn base_path(&self) -> Option<BasePath> {
		self.base_path.clone().map(Into::into)
	}

	/// Specify the development chain.
	pub fn is_dev(&self) -> bool {
		self.dev
	}

	/// Get the chain spec for the parameters provided
	pub fn chain_id(&self, is_dev: bool) -> String {
		match self.chain {
			Some(ref chain) => chain.clone(),
			None => {
				if is_dev {
					"dev".into()
				} else {
					"".into()
				}
			}
		}
	}

	/// Get the filters for the logging
	pub fn log_filters(&self) -> &[String] {
		&self.log
	}
}