use actix::{Actor, Context};
use sqlx::PgPool;

pub use account_orders::*;
pub use accounts::*;
pub use products::*;
pub use stocks::*;

mod account_orders;
mod accounts;
mod products;
mod stocks;

#[macro_export]
macro_rules! async_handler {
    ($msg: ty, $async: ident, $res: ty) => {
        impl Handler<$msg> for Database {
            type Result = ResponseActFuture<Self, Result<$res>>;

            fn handle(&mut self, msg: $msg, _ctx: &mut Self::Context) -> Self::Result {
                let pool = self.pool.clone();
                Box::pin(async { $async(msg, pool).await }.into_actor(self))
            }
        }
    };
}

#[derive(Debug, thiserror::Error)]
pub enum Error {
    #[error("Failed to connect to database. {0:?}")]
    Connect(sqlx::Error),
    #[error("{0}")]
    Account(accounts::Error),
    #[error("{0}")]
    AccountOrder(account_orders::Error),
    #[error("{0}")]
    Product(products::Error),
    #[error("{0}")]
    Stock(stocks::Error),
}

pub type Result<T> = std::result::Result<T, Error>;

pub struct Database {
    pool: PgPool,
}

impl Clone for Database {
    fn clone(&self) -> Self {
        Self { pool: self.pool.clone() }
    }
}

impl Database {
    pub(crate) async fn build(url: &str) -> Result<Self> {
        let pool = sqlx::PgPool::connect(url).await.map_err(Error::Connect)?;
        Ok(Database { pool })
    }

    pub fn pool(&self) -> &PgPool {
        &self.pool
    }
}

impl Actor for Database {
    type Context = Context<Self>;
}