use anyhow::Context;
use diesel::r2d2::ConnectionManager;

pub type DbBackend = diesel::pg::Pg;
pub type DbConnection = diesel::PgConnection;
pub type DbPool = diesel::r2d2::Pool<
    diesel::r2d2::ConnectionManager<DbConnection>
>;

pub fn connect(url: &str) -> anyhow::Result<DbPool> {
    let config= erplt_config::Config::get();
    let manager = ConnectionManager::<DbConnection>::new(url);

    tracing::info!("Creating database pool at {}", config.database.connect_url_redacted());

    let pool = DbPool::builder()
        .max_size(config.database.max_pool_size)
        .min_idle(Some(config.database.min_idle))
        .connection_timeout(config.database.connection_timeout)
        .idle_timeout(Some(config.database.idle_timeout))
        .max_lifetime(Some(config.database.max_lifetime))
        .test_on_check_out(config.database.test_on_check_out)
        .build(manager)
        .context("Failed to create database connection pool")?;

    pool.get()
        .context("Failed to connect to PostgreSQL")?;
    tracing::info!("Connected to database");
    Ok(pool)
}