#![allow(unused)]

mod application;
mod commands;
mod compositor;
mod keymap;
mod ui;

use application::Application;

use clap::{App, Arg};
use std::path::PathBuf;

use anyhow::Error;

fn setup_logging(verbosity: u64) -> Result<(), fern::InitError> {
    let mut base_config = fern::Dispatch::new();

    // Let's say we depend on something which whose "info" level messages are too
    // verbose to include in end-user output. If we don't need them,
    // let's not include them.
    // .level_for("overly-verbose-target", log::LevelFilter::Warn)

    base_config = match verbosity {
        0 => base_config.level(log::LevelFilter::Warn),
        1 => base_config.level(log::LevelFilter::Info),
        2 => base_config.level(log::LevelFilter::Debug),
        _3_or_more => base_config.level(log::LevelFilter::Trace),
    };

    let home = dirs_next::home_dir().expect("can't find the home directory");

    // Separate file config so we can include year, month and day in file logs
    let file_config = fern::Dispatch::new()
        .format(|out, message, record| {
            out.finish(format_args!(
                "{} {} [{}] {}",
                chrono::Local::now().format("%Y-%m-%dT%H:%M:%S%.3f"),
                record.target(),
                record.level(),
                message
            ))
        })
        .chain(fern::log_file(home.join("helix.log"))?);

    base_config.chain(file_config).apply()?;

    Ok(())
}

fn main() {
    let args = clap::app_from_crate!()
        .arg(
            Arg::new("files")
                .about("Sets the input file to use")
                .required(false)
                .multiple(true)
                .index(1),
        )
        .arg(
            Arg::new("verbose")
                .about("Increases logging verbosity each use for up to 3 times")
                .short('v')
                .takes_value(false)
                .multiple_occurrences(true),
        )
        .get_matches();

    let verbosity: u64 = args.occurrences_of("verbose");

    setup_logging(verbosity).expect("failed to initialize logging.");

    // initialize language registry
    use helix_core::config_dir;
    use helix_core::syntax::{Loader, LOADER};

    // load $HOME/.config/helix/languages.toml, fallback to default config
    let config = std::fs::read(config_dir().join("languages.toml"));
    let toml = config
        .as_deref()
        .unwrap_or(include_bytes!("../../languages.toml"));

    LOADER.get_or_init(|| {
        let config = toml::from_slice(toml).expect("Could not parse languages.toml");
        Loader::new(config)
    });

    let runtime = tokio::runtime::Runtime::new().unwrap();

    // TODO: use the thread local executor to spawn the application task separately from the work pool
    runtime.block_on(async move {
        let mut app = Application::new(args).unwrap();

        app.run().await;
    });
}