stor-age 0.6.2

use std::str::FromStr;

use clap::ArgMatches;
use clap::{builder::PossibleValue, ValueEnum};

#[derive(Clone, Copy, Debug)]
pub enum Output {
    Oneline,
    Prometheus,
    #[cfg(feature = "table")]
    Table,
}

impl Output {
    #[must_use]
    pub const fn name(&self) -> &'static str {
        match self {
            Self::Oneline => "oneline",
            Self::Prometheus => "prometheus",
            #[cfg(feature = "table")]
            Self::Table => "table",
        }
    }
}

impl ValueEnum for Output {
    fn value_variants<'a>() -> &'a [Self] {
        &[
            Self::Oneline,
            Self::Prometheus,
            #[cfg(feature = "table")]
            Self::Table,
        ]
    }

    fn to_possible_value<'a>(&self) -> Option<PossibleValue> {
        Some(PossibleValue::new(self.name()))
    }
}

impl FromStr for Output {
    type Err = String;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let s = s.to_lowercase();
        let s = s.as_str();

        match s {
            "oneline" => Ok(Self::Oneline),
            "prometheus" => Ok(Self::Prometheus),
            #[cfg(feature = "table")]
            "table" => Ok(Self::Table),
            _ => Err(String::from("invalid output")),
        }
    }
}

#[allow(clippy::struct_excessive_bools)]
#[derive(Clone, Debug)]
pub struct Config {
    pub debug: bool,
    pub progress: bool,
    pub ages_in_days: Vec<u64>,
    pub output: Output,

    #[cfg(target_family = "unix")]
    pub one_file_system: bool,

    #[cfg(feature = "spectrum-scale")]
    pub spectrum_scale: bool,

    #[cfg(feature = "spectrum-scale")]
    pub spectrum_scale_nodes: Option<String>,

    #[cfg(feature = "spectrum-scale")]
    pub spectrum_scale_global_work_dir: Option<String>,

    #[cfg(feature = "spectrum-scale")]
    pub spectrum_scale_local_work_dir: Option<String>,
}

impl Config {
    /// Returns configuration from `clap` arguments.
    ///
    /// # Panics
    ///
    /// Panics if required arguments are not present.
    #[must_use]
    pub fn from_args(args: &ArgMatches) -> Self {
        let mut ages_in_days: Vec<u64> = args
            .get_many::<u64>("age")
            .expect("age is required")
            .copied()
            .collect();
        ages_in_days.sort_unstable();
        ages_in_days.dedup();

        let output = args
            .get_one::<Output>("format")
            .copied()
            .expect("format is required or has default");

        let debug = args.get_flag("debug");
        let progress = args.get_flag("progress") || debug;

        Self {
            debug,
            progress,
            ages_in_days,
            output,

            #[cfg(target_family = "unix")]
            one_file_system: args.get_flag("one-file-system"),

            #[cfg(feature = "spectrum-scale")]
            spectrum_scale: args.get_flag("spectrum-scale")
                || args.contains_id("spectrum-scale-N")
                || args.contains_id("spectrum-scale-g")
                || args.contains_id("spectrum-scale-s"),

            #[cfg(feature = "spectrum-scale")]
            spectrum_scale_nodes: args
                .get_one::<String>("spectrum-scale-N")
                .cloned(),

            #[cfg(feature = "spectrum-scale")]
            spectrum_scale_global_work_dir: args
                .get_one::<String>("spectrum-scale-g")
                .cloned(),

            #[cfg(feature = "spectrum-scale")]
            spectrum_scale_local_work_dir: args
                .get_one::<String>("spectrum-scale-s")
                .cloned(),
        }
    }
}