//  Copyright 2020, The Tari Project
//
//  Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
//  following conditions are met:
//
//  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
//  disclaimer.
//
//  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
//  following disclaimer in the documentation and/or other materials provided with the distribution.
//
//  3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote
//  products derived from this software without specific prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
//  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
//  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
//  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
//  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
//  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
//  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

use tari_comms::{
    connectivity::ConnectivityError,
    peer_manager::PeerManagerError,
    protocol::rpc::{RpcError, RpcStatus},
};
use tokio::task::JoinError;

use crate::peer_validator::DhtPeerValidatorError;

#[derive(thiserror::Error, Debug)]
pub enum NetworkDiscoveryError {
    #[error("RPC error: {0}")]
    RpcError(#[from] RpcError),
    #[error("RPC status error: {0}")]
    RpcStatus(#[from] RpcStatus),
    #[error("Peer manager error: {0}")]
    PeerManagerError(#[from] PeerManagerError),
    #[error("Connectivity error: {0}")]
    ConnectivityError(#[from] ConnectivityError),
    #[error("No sync peers available")]
    NoSyncPeers,
    #[error("Sync peer sent invalid peer: {0}")]
    PeerValidationError(#[from] DhtPeerValidatorError),
    #[error("Sync peer sent empty peer message")]
    EmptyPeerMessageReceived,
    #[error("Sync peer sent too many peers")]
    TooManyPeersReceived,
    #[error("Sync peer sent duplicate peer")]
    DuplicatePeerReceived,
    #[error("Sync peer sent invalid peer data: {0}")]
    InvalidPeerDataReceived(anyhow::Error),
    #[error("Tokio task join error: `{0}`")]
    JoinError(#[from] JoinError),
    #[error("Timeout waiting for {operation} to {peer} after {duration}")]
    Timeout {
        operation: String,
        peer: String,
        duration: String,
    },
    #[error("Peer connection to {peer} closed: {reason}")]
    PeerConnectionClosed { peer: String, reason: String },
}

// Custom PartialEq implementation that only compares the discriminant (variant type)
impl PartialEq for NetworkDiscoveryError {
    fn eq(&self, other: &Self) -> bool {
        matches!(
            (self, other),
            (Self::RpcError(_), Self::RpcError(_)) |
                (Self::RpcStatus(_), Self::RpcStatus(_)) |
                (Self::PeerManagerError(_), Self::PeerManagerError(_)) |
                (Self::ConnectivityError(_), Self::ConnectivityError(_)) |
                (Self::NoSyncPeers, Self::NoSyncPeers) |
                (Self::PeerValidationError(_), Self::PeerValidationError(_)) |
                (Self::EmptyPeerMessageReceived, Self::EmptyPeerMessageReceived) |
                (Self::TooManyPeersReceived, Self::TooManyPeersReceived) |
                (Self::DuplicatePeerReceived, Self::DuplicatePeerReceived) |
                (Self::InvalidPeerDataReceived(_), Self::InvalidPeerDataReceived(_)) |
                (Self::PeerConnectionClosed { .. }, Self::PeerConnectionClosed { .. })
        )
    }
}
