// Avoid spurious warnings with --no-default-features, which isn't expected to
// work anyway
#![cfg_attr(not(any(feature = "sqlite", feature = "rocksdb")), allow(unused))]

use std::{process::ExitCode, sync::RwLock};

use clap::Parser;
use tracing::error;

mod api;
mod cli;
mod config;
mod database;
mod error;
mod observability;
mod service;
mod utils;

pub(crate) use api::ruma_wrapper::{Ar, Ra};
pub(crate) use config::Config;
pub(crate) use service::{pdu::PduEvent, Services};
#[cfg(all(not(target_env = "msvc"), feature = "jemalloc"))]
use tikv_jemallocator::Jemalloc;
pub(crate) use utils::error::{Error, Result};

#[cfg(all(not(target_env = "msvc"), feature = "jemalloc"))]
#[global_allocator]
static GLOBAL: Jemalloc = Jemalloc;

pub(crate) static SERVICES: RwLock<Option<&'static Services>> =
    RwLock::new(None);

/// Convenient access to the global [`Services`] instance
pub(crate) fn services() -> &'static Services {
    SERVICES
        .read()
        .unwrap()
        .expect("SERVICES should be initialized when this is called")
}

/// Returns the current version of the crate with extra info if supplied
///
/// Set the environment variable `GRAPEVINE_VERSION_EXTRA` to any UTF-8 string
/// to include it in parenthesis after the SemVer version. A common value are
/// git commit hashes.
fn version() -> String {
    let cargo_pkg_version = env!("CARGO_PKG_VERSION");

    match option_env!("GRAPEVINE_VERSION_EXTRA") {
        Some(x) => format!("{cargo_pkg_version} ({x})"),
        None => cargo_pkg_version.to_owned(),
    }
}

#[tokio::main]
async fn main() -> ExitCode {
    let args = cli::Args::parse();
    let Err(e) = args.run().await else {
        return ExitCode::SUCCESS;
    };

    eprintln!(
        "Error: {}",
        error::DisplayWithSources {
            error: &e,
            infix: "\n    Caused by: "
        }
    );

    ExitCode::FAILURE
}