use super::{ExecErr, ExecResult, QueryErr, QueryResult};
use crate::{DatabaseConnection, Statement};
use async_trait::async_trait;
use std::{error::Error, fmt};

#[async_trait]
pub trait Connector {
    fn accepts(string: &str) -> bool;

    async fn connect(string: &str) -> Result<DatabaseConnection, ConnectionErr>;
}

#[async_trait]
pub trait Connection {
    async fn execute(&self, stmt: Statement) -> Result<ExecResult, ExecErr>;

    async fn query_one(&self, stmt: Statement) -> Result<Option<QueryResult>, QueryErr>;

    async fn query_all(&self, stmt: Statement) -> Result<Vec<QueryResult>, QueryErr>;
}

#[derive(Debug)]
pub struct ConnectionErr;

// ConnectionErr //

impl Error for ConnectionErr {}

impl fmt::Display for ConnectionErr {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}