use crate::{Config, Result};
use clap::{Args, Parser};
use std::fs::File;
use std::sync::Arc;
use tracing_subscriber::{filter::LevelFilter, Layer, Registry};

/// Simple program to manage projects and ssh hosts using tmux
#[derive(Parser, Debug)]
#[command(author, version, about)]
pub struct Cli {
    #[command(flatten)]
    pub verbose: Verbosity,

    /// Connect to ssh host
    #[arg(short, long)]
    pub ssh: Option<String>,

    #[command(flatten)]
    pub config: Config,
}

impl Cli {
    pub fn as_layer(&self) -> Result<Vec<Box<dyn Layer<Registry> + Send + Sync>>> {
        let mut layers = Vec::new();

        let fmt_layer = tracing_subscriber::fmt::layer()
            .pretty()
            .with_filter(self.verbose.into_filter())
            .boxed();

        layers.push(fmt_layer);

        if self.config.enable_logging {
            let file = File::create(&self.config.log_file)?;
            let log_layer = tracing_subscriber::fmt::layer()
                .with_writer(Arc::new(file))
                .boxed();
            layers.push(log_layer);
        };

        Ok(layers)
    }
}

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

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

impl Verbosity {
    pub fn into_filter(&self) -> LevelFilter {
        self.into()
    }
}

impl From<&Verbosity> for LevelFilter {
    fn from(value: &Verbosity) -> Self {
        match value.verbose + 1 - u8::from(value.quiet) {
            0 => LevelFilter::OFF,
            1 => LevelFilter::ERROR,
            2 => LevelFilter::WARN,
            3 => LevelFilter::INFO,
            4 => LevelFilter::DEBUG,
            _ => LevelFilter::TRACE,
        }
    }
}

#[cfg(test)]
mod tests {
    #[test]
    fn test_start() {
        assert_eq!(1, 1);
    }
}