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use anyhow::{Context, Result};
use clap::Parser;
use derivative::Derivative;

use tracing::{debug, metadata::LevelFilter, Level};
use tracing_subscriber::{fmt::format::FmtSpan, prelude::*, EnvFilter};

use crate::repo::{Aggregator, Repos};

pub mod config;
pub mod forge;
pub mod git;
pub mod repo;

mod list;
mod sync;
mod update;

#[cfg(test)]
mod tests;

#[derive(Derivative)]
#[derivative(Debug)]
struct GTree {
    figment: figment::Figment,
    config: config::Config,
    args: config::args::Args,
    forge: forge::Forge,
}

impl GTree {
    #[tracing::instrument(level = "trace")]
    pub async fn new() -> Result<GTree> {
        let args = config::args::Args::parse();

        let figment = config::Config::figment()?;
        let config: config::Config = figment.extract()?;

        let (_name, forge_config) = config
            .iter()
            .next()
            .context("No Forge configured, please setup a forge")?;

        let forge = forge::Forge::new(forge_config).await?;

        Ok(GTree {
            figment,
            config,
            args,
            forge,
        })
    }

    #[tracing::instrument(level = "trace")]
    pub async fn run(self) -> Result<()> {
        let scope = self.args.scope.as_ref().map_or("", |x| x);

        // TODO select a specific forge
        let (_name, forge) = self
            .config
            .iter()
            .next()
            .context("No Forge configured, please setup a forge")?;

        let (local, remote) = tokio::join!(
            Repos::from_local(forge.root(), scope),
            Repos::from_forge(forge.root(), self.forge.projects(scope).await?)
        );

        let repos = Repos::aggregate(local, remote).await;

        match self.args.command {
            config::args::Commands::Sync => self.sync(repos).await,
            config::args::Commands::Update => self.update(repos).await,
            config::args::Commands::List => self.list(repos).await?,
        };

        Ok(())
    }
}

#[tokio::main]
async fn main() -> Result<()> {
    use tracing_flame::FlameLayer;

    let filter = tracing_subscriber::filter::Targets::new()
        .with_default(Level::TRACE)
        .with_target("hyper", LevelFilter::OFF)
        .with_target("reqwest", LevelFilter::OFF);

    let env_filter = EnvFilter::from_default_env();

    let (flame_layer, _guard) = FlameLayer::with_file("./tracing.folded").unwrap();
    let flameguard = flame_layer.flush_on_drop();

    tracing_subscriber::registry()
        .with(tracing_subscriber::fmt::layer().with_span_events(FmtSpan::ACTIVE))
        .with(filter)
        .with(env_filter)
        .with(flame_layer)
        .init();

    debug!("starting");

    let gtree = GTree::new().await?;

    gtree.run().await?;

    flameguard.flush()?;

    Ok(())
}