use thiserror::Error;
use crate::log;

#[allow(dead_code)]
#[derive(Error, Debug)]
pub enum BlockchainError {
    #[error("invalid account creation")]
    InvalidAccountCreation,
    #[error("Transactional error")]
    Tx(#[from] TxError)
}

#[allow(dead_code)]
#[derive(Error, Debug)]
pub enum TxError {
    #[error("from field is empty")]
    FromEmpty,
    #[error("to field is empty")]
    ToEmpty,
    #[error("insuffitient fonds")]
    FromInsuffitientFonds,
    #[error("0 value transaction")]
    ValueEmpty,
    #[error("account {0} not found in database")]
    UnknownAccount(String)
}

pub fn print_error_chain(err: anyhow::Error) {
  let mut err_string = String::from(format!("Error: {}\n", err));

  let mut source = err.source();
  let mut level = 1;

  while let Some(err) = source {
    err_string.push_str(format!("  {}: {}\n", level, err).as_str());
    source = err.source();
    level += 1;
  }
  log(err_string)
}

#[derive(Debug, Error)]
pub enum SystemError<T>
where
    T: std::fmt::Debug
{
    #[error("TODO")]
    TODO,

    #[error("Failed to send message: {message:?}")]
    ChannelSendError { message: T },

    #[error("Channel {message:?} was closed")]
    ChannelClosed { message: T },

    #[error("Event Bus closed")]
    EventBusClosed(#[from] tokio::sync::broadcast::error::RecvError)
}