// This file is part of Deja-Vu.
//
// Deja-Vu 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.
//
// Deja-Vu 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 Deja-Vu. If not, see <https://www.gnu.org/licenses/>.
//
use clap::Parser;

use crate::config::{get_config_dir, get_data_dir};

#[derive(Parser, Debug)]
#[command(author, version = version(), about)]
pub struct Cli {
    /// Tick rate, i.e. number of ticks per second
    #[arg(short, long, value_name = "FLOAT", default_value_t = 4.0)]
    pub tick_rate: f64,

    /// Frame rate, i.e. number of frames per second
    #[arg(short, long, value_name = "FLOAT", default_value_t = 60.0)]
    pub frame_rate: f64,
}

const VERSION_MESSAGE: &str = concat!(
    env!("CARGO_PKG_VERSION"),
    "-",
    env!("VERGEN_GIT_DESCRIBE"),
    " (",
    env!("VERGEN_BUILD_DATE"),
    ")"
);

#[must_use]
pub fn version() -> String {
    let author = clap::crate_authors!();

    // let current_exe_path = PathBuf::from(clap::crate_name!()).display().to_string();
    let config_dir_path = get_config_dir().display().to_string();
    let data_dir_path = get_data_dir().display().to_string();

    format!(
        "\
{VERSION_MESSAGE}

Authors: {author}

Config directory: {config_dir_path}
Data directory: {data_dir_path}"
    )
}