use std::fmt;

use crate::db::UserRef;

pub type BoxedError = Box<dyn std::error::Error + Send + Sync + 'static>;

#[derive(Debug)]
pub enum UserCreationError {
    DomainNotFound(String),
    UserAlreadyExists(UserRef),
    Permissions,
}

impl fmt::Display for UserCreationError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::DomainNotFound(domain) => write!(f, "No domain {domain} to create user in"),
            Self::UserAlreadyExists(user) => write!(f, "User already exists: {user}"),
            Self::Permissions => write!(f, "You do not have permissions to create this user"),
        }
    }
}

impl std::error::Error for UserCreationError {}

#[derive(Debug)]
pub enum DomainCreationError {
    DomainAlreadyExists(String),
    InvalidDomain(String),
}

impl fmt::Display for DomainCreationError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::DomainAlreadyExists(domain) => {
                write!(f, "Cannot create domain {domain} because it already exists")
            }
            Self::InvalidDomain(domain) => write!(
                f,
                "Cannot create domain `{domain}` because it's not considered a valid domain"
            ),
        }
    }
}

impl std::error::Error for DomainCreationError {}