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use sqlx::sqlite::SqlitePool;

use super::create::{self, Create};
use crate::{clock::DateTime, event::Broadcaster, login::Login, name::Name, password::Password};

pub struct Users {
    db: SqlitePool,
    events: Broadcaster,
}

impl Users {
    pub const fn new(db: SqlitePool, events: Broadcaster) -> Self {
        Self { db, events }
    }

    pub async fn create(
        &self,
        name: &Name,
        password: &Password,
        created_at: &DateTime,
    ) -> Result<Login, CreateError> {
        let create = Create::begin(name, password, created_at);
        let validated = create.validate()?;

        let mut tx = self.db.begin().await?;
        let stored = validated.store(&mut tx).await?;
        tx.commit().await?;

        let login = stored.login().to_owned();
        stored.publish(&self.events);

        Ok(login)
    }
}

#[derive(Debug, thiserror::Error)]
pub enum CreateError {
    #[error("invalid user name: {0}")]
    InvalidName(Name),
    #[error(transparent)]
    PasswordHash(#[from] password_hash::Error),
    #[error(transparent)]
    Database(#[from] sqlx::Error),
}

impl From<create::Error> for CreateError {
    fn from(error: create::Error) -> Self {
        match error {
            create::Error::InvalidName(name) => Self::InvalidName(name),
            create::Error::PasswordHash(error) => Self::PasswordHash(error),
        }
    }
}