use domain::events::DomainEvent;
use domain::models::User;
use domain::{DomainResult, Email, Password};

use super::commands::RegisterCommand;
use super::deps::AuthDeps;

pub async fn execute(deps: &AuthDeps, cmd: RegisterCommand) -> DomainResult<User> {
    let email = Email::new(&cmd.email)?;
    let password = Password::new(&cmd.password)?;

    if deps.user_query.find_by_email(email.as_ref()).await?.is_some() {
        return Err(domain::DomainError::UserAlreadyExists(cmd.email));
    }

    let hash = deps.auth_service.hash_password(password.as_ref())?;

    let mut user = User::new_local(email, hash);
    if deps.user_query.count_users().await? == 0 {
        user.promote_to_admin();
    }

    deps.user_command.save(&user).await?;

    deps.event_publisher
        .publish(DomainEvent::UserRegistered {
            user_id: user.id(),
        })
        .await?;

    Ok(user)
}

#[cfg(test)]
#[path = "tests/register.rs"]
mod tests;