//! The Apollo framework is a toolkit for building stable and robust server software.
//!
//! **Apollo** was extracted out of [Jupiter](https://github.com/scireum/jupiter) to make its
//! core parse usable by other libraries or applications.
//!
//! Apollo provides a small **dependency injection helper** called *Platform** along with some
//! tooling to setup logging, format messages and to react on signals. This is commonly required
//! to properly run inside a Docker container.
#![deny(
    missing_docs,
    trivial_casts,
    trivial_numeric_casts,
    unused_extern_crates,
    unused_import_braces,
    unused_results
)]

use simplelog::{ConfigBuilder, LevelFilter, SimpleLogger};
use std::sync::Once;

pub mod average;
pub mod config;
pub mod fmt;
pub mod platform;
pub mod server;
pub mod signals;

/// Contains the version of the Apollo framework.
pub const APOLLO_VERSION: &str = "0.3.0";

/// Contains the git commit hash of the Apollo build being used.
pub const APOLLO_REVISION: &str = "6f221e091750dc8a717c93b0463bd843abdbfd58";

/// Initializes the logging system.
///
/// This uses the simple logger crate with a logging format which is compatible with docker
/// environments and quite well readable by common tools.
pub fn init_logging() {
    static INIT_LOGGING: Once = Once::new();
    static DATE_FORMAT: &str = "[%Y-%m-%dT%H:%M:%S%.3f]";

    // We need to do this as otherwise the integration tests might crash as the logging system
    // is initialized several times...
    INIT_LOGGING.call_once(|| {
        if let Err(error) = SimpleLogger::init(
            LevelFilter::Debug,
            ConfigBuilder::new()
                .set_time_format_str(DATE_FORMAT)
                .set_thread_level(LevelFilter::Trace)
                .set_target_level(LevelFilter::Error)
                .set_location_level(LevelFilter::Trace)
                .build(),
        ) {
            panic!("Failed to initialize logging system: {}", error);
        }
    });
}

#[cfg(test)]
mod testing {
    use std::sync::Mutex;

    lazy_static::lazy_static! {
        /// Provides a global lock which has to be acquired if a test operates on shared
        /// resources. This would either be our test port (1503) on which we start our
        /// local server for integrations tests or the repository which operates on the
        /// file system. Using this lock, we can still execute all other tests in parallel
        /// and only block if required.
        pub static ref SHARED_TEST_RESOURCES: Mutex<()> = Mutex::new(());
    }

    /// Executes async code within a single threaded tokio runtime.
    pub fn test_async<F: std::future::Future>(future: F) {
        use tokio::runtime;

        let rt = runtime::Builder::new_current_thread()
            .enable_all()
            .build()
            .unwrap();

        let _ = rt.block_on(future);
    }
}