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use crate::{Config, SearchPath};
use clap::{Args, Parser};
use figment::{value, Metadata, Profile, Provider};
use serde::Serialize;
use std::path::PathBuf;
use tracing::Level;

/// Tool for listing project directories.
#[derive(Debug, Clone, Default, Parser, Serialize)]
#[command(author, version, about)]
#[serde(into = "Config")]
pub struct Cli {
    /// Directory to search.
    ///
    /// Directories are searched recursively based on `--max-depth`.
    pub(crate) paths: Vec<PathBuf>,

    /// Max depth to recurse.
    ///
    /// By default, no limit is set. Setting to 0 will only use the supplied directory.
    #[arg(short = 'd', long)]
    pub(crate) max_depth: Option<usize>,

    /// Recurse into hidden directories.
    ///
    /// Traverse into hidden directories while searching. A directory is considered hidden
    /// if its name starts with a `.` sign (dot). If `--max-depth` is 0, this has no effect.
    #[arg(long, default_value_t)]
    pub(crate) hidden: bool,

    #[command(flatten)]
    pub verbose: Verbosity,
}

impl Provider for Cli {
    fn metadata(&self) -> Metadata {
        Metadata::named("Projectr cli provider")
    }

    fn data(&self) -> figment::error::Result<value::Map<Profile, value::Dict>> {
        Config::from(self.to_owned()).data()
    }
}

impl From<Cli> for Config {
    fn from(value: Cli) -> Self {
        let paths = value
            .paths
            .iter()
            .cloned()
            .map(|p| SearchPath {
                path: p,
                hidden: value.hidden,
                recurse: value.max_depth,
            })
            .collect();

        Config { paths }
    }
}

#[derive(Debug, Default, Clone, Args)]
pub struct Verbosity {
    /// Print additional information per occurrence.
    ///
    /// Conflicts with `--quiet`.
    #[arg(short, long, global = true, action = clap::ArgAction::Count, conflicts_with = "quiet")]
    pub verbose: u8,

    /// Suppress all output.
    ///
    /// Conflicts with `--verbose`.
    #[arg(short, long, global = true, conflicts_with = "verbose")]
    pub quiet: bool,
}

impl From<Verbosity> for Option<Level> {
    fn from(value: Verbosity) -> Self {
        match value.verbose + 1 - u8::from(value.quiet) {
            0 => None,
            1 => Some(Level::ERROR),
            2 => Some(Level::WARN),
            3 => Some(Level::INFO),
            4 => Some(Level::DEBUG),
            _ => Some(Level::TRACE),
        }
    }
}