// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.

// OpenEthereum 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.

// OpenEthereum 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 OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.

//! Parity version specific information.

extern crate parity_bytes as bytes;
extern crate rlp;
extern crate target_info;

use bytes::Bytes;
use rlp::RlpStream;
use target_info::Target;

mod vergen {
    #![allow(unused)]
    include!(concat!(env!("OUT_DIR"), "/version.rs"));
}

mod generated {
    include!(concat!(env!("OUT_DIR"), "/meta.rs"));
}

#[cfg(feature = "final")]
const THIS_TRACK: &'static str = "stable";
// ^^^ should be reset in Cargo.toml to "stable"

#[cfg(not(feature = "final"))]
const THIS_TRACK: &'static str = "unstable";
// ^^^ This gets used when we're not building a final release; should stay as "unstable".

/// Get the platform identifier.
pub fn platform() -> String {
    let env = Target::env();
    let env_dash = if env.is_empty() { "" } else { "-" };
    format!("{}-{}{}{}", Target::arch(), Target::os(), env_dash, env)
}

/// Get the standard version string for this software.
pub fn version() -> String {
    let sha3 = vergen::short_sha();
    let sha3_dash = if sha3.is_empty() { "" } else { "-" };
    let commit_date = vergen::commit_date().replace("-", "");
    let date_dash = if commit_date.is_empty() { "" } else { "-" };
    format!(
        "OpenEthereum/v{}-{}{}{}{}{}/{}/rustc{}",
        env!("CARGO_PKG_VERSION"),
        THIS_TRACK,
        sha3_dash,
        sha3,
        date_dash,
        commit_date,
        platform(),
        generated::rustc_version()
    )
}

/// Get the standard version data for this software.
pub fn version_data() -> Bytes {
    let mut s = RlpStream::new_list(4);
    let v = (env!("CARGO_PKG_VERSION_MAJOR")
        .parse::<u32>()
        .expect("Environment variables are known to be valid; qed")
        << 16)
        + (env!("CARGO_PKG_VERSION_MINOR")
            .parse::<u32>()
            .expect("Environment variables are known to be valid; qed")
            << 8)
        + env!("CARGO_PKG_VERSION_PATCH")
            .parse::<u32>()
            .expect("Environment variables are known to be valid; qed");
    s.append(&v);
    s.append(&"OpenEthereum");
    s.append(&generated::rustc_version());
    s.append(&&Target::os()[0..2]);
    s.out()
}

/// Provide raw information on the package.
pub fn raw_package_info() -> (&'static str, &'static str, &'static str) {
    (THIS_TRACK, env!["CARGO_PKG_VERSION"], vergen::sha())
}
