use sqlx::{sqlite::Sqlite, SqliteConnection, Transaction};
use uuid::Uuid;

use super::logins::Id as LoginId;
use crate::error::BoxedError;

type DateTime = chrono::DateTime<chrono::Utc>;

pub trait Provider {
    fn tokens(&mut self) -> Tokens;
}

impl<'c> Provider for Transaction<'c, Sqlite> {
    fn tokens(&mut self) -> Tokens {
        Tokens(self)
    }
}

pub struct Tokens<'t>(&'t mut SqliteConnection);

impl<'c> Tokens<'c> {
    /// Issue a new token for an existing login. The issued_at timestamp will
    /// be used to control expiry.
    pub async fn issue(
        &mut self,
        login: &LoginId,
        issued_at: DateTime,
    ) -> Result<String, BoxedError> {
        let secret = Uuid::new_v4().to_string();

        let secret = sqlx::query_scalar!(
            r#"
                insert
                into token (secret, login, issued_at)
                values ($1, $2, $3)
                returning secret as "secret!"
            "#,
            secret,
            login,
            issued_at,
        )
        .fetch_one(&mut *self.0)
        .await?;

        Ok(secret)
    }
}