mod actors;
mod config;

use actix::prelude::*;

use std::path::PathBuf;

use tracing::{error, info};

use crate::{
    filesystem::FileSystem,
    server::config::{ForgeName, RepoName},
};

pub fn init(fs: FileSystem) {
    let file_name = "git-next-server.toml";
    let path = PathBuf::from(file_name);
    if fs.file_exists(&path) {
        eprintln!(
            "The configuration file already exists at {} - not overwritting it.",
            file_name
        );
    } else {
        match fs.write_file(file_name, include_str!("../../server-default.toml")) {
            Ok(_) => println!("Created a default configuration file at {}", file_name),
            Err(e) => {
                eprintln!("Failed to write to the configuration file: {}", e)
            }
        }
    }
}

pub fn start(fs: FileSystem) {
    let Ok(_) = init_logging() else {
        eprintln!("Failed to initialize logging.");
        return;
    };
    info!("Starting Server...");
    let config = match config::ServerConfig::load(&fs) {
        Ok(config) => config,
        Err(err) => {
            error!("Failed to load config file. Error: {}", err);
            return;
        }
    };
    info!("Config loaded");
    info!("Loaded config");
    let mut actors: Vec<(ForgeName, RepoName, actors::repo::RepoActor)> = vec![];
    config.forges().for_each(|(forge_name, forge)| {
        let span = tracing::info_span!("Forge", %forge_name);
        let _guard = span.enter();
        info!("Forge: {}", forge_name);
        info!("Forge Type: {}", forge.forge_type());
        info!("Hostname: {}", forge.hostname());
        info!("User: {}", forge.user());
        forge.repos().for_each(|(repo_name, repo)| {
            let span = tracing::info_span!("Repo", %repo_name, %repo);
            let _guard = span.enter();
            info!("Creating Repo");
            let actor = actors::repo::RepoActor {
                details: config::RepoDetails::new(&repo_name, repo, &forge_name, forge),
            };
            actors.push((forge_name.clone(), repo_name, actor));
            info!("Created Repo");
        });
    });
    info!("Sending StartRepo to all actors...");

    actix::System::new().block_on(async {
        let mut addresses: Vec<Addr<actors::repo::RepoActor>> = vec![];
        actors.into_iter().for_each(|actor| {
            let (forge_name, repo_name, actor) = actor;
            let span = tracing::info_span!("Forge/Repo", %forge_name, %repo_name);
            let _guard = span.enter();
            info!("Starting actor");
            let addr = actor.start();
            info!("Sending StartRepo to actor");
            addr.do_send(actors::repo::StartRepo);
            addresses.push(addr);
            info!("Sent StartRepo to actor");
        });
        let _ = actix_rt::signal::ctrl_c().await;
        info!("Ctrl-C received, shutting down...");
        drop(addresses);
    });
}

pub fn init_logging() -> Result<(), tracing::subscriber::SetGlobalDefaultError> {
    use tracing_subscriber::prelude::*;

    let console_layer = console_subscriber::ConsoleLayer::builder().spawn();

    let subscriber = tracing_subscriber::fmt::layer()
        // NOTE: set RUSTLOG in ${root}/.cargo/config
        .with_target(false)
        .with_file(true)
        .with_line_number(true);
    tracing_subscriber::registry()
        .with(console_layer)
        .with(subscriber)
        .init();
    Ok(())
}