use std::path::PathBuf;

use clap::Parser;

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

#[derive(Parser, Debug)]
#[command(author, version = version(), about)]
pub struct Cli {
    /// File to edit. A path that does not exist is created on write.
    // MJB-LLR-111, MJB-LLR-112
    #[arg(value_name = "FILE")]
    pub file: Option<PathBuf>,

    /// 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"),
    ")"
);

/// The `origin` remote of the checkout this binary was built from, emitted by
/// `build.rs`.
const GIT_REMOTE_URL: &str = env!("VERGEN_GIT_REMOTE_URL");

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}

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