package agent

import (
	"net/http"

	"github.com/hashicorp/consul/consul/structs"
	"github.com/hashicorp/raft"
)

// OperatorRaftConfiguration is used to inspect the current Raft configuration.
// This supports the stale query mode in case the cluster doesn't have a leader.
func (s *HTTPServer) OperatorRaftConfiguration(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
	if req.Method != "GET" {
		resp.WriteHeader(http.StatusMethodNotAllowed)
		return nil, nil
	}

	var args structs.DCSpecificRequest
	if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
		return nil, nil
	}

	var reply structs.RaftConfigurationResponse
	if err := s.agent.RPC("Operator.RaftGetConfiguration", &args, &reply); err != nil {
		return nil, err
	}

	return reply, nil
}

// OperatorRaftPeer supports actions on Raft peers. Currently we only support
// removing peers by address.
func (s *HTTPServer) OperatorRaftPeer(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
	if req.Method != "DELETE" {
		resp.WriteHeader(http.StatusMethodNotAllowed)
		return nil, nil
	}

	var args structs.RaftPeerByAddressRequest
	s.parseDC(req, &args.Datacenter)
	s.parseToken(req, &args.Token)

	params := req.URL.Query()
	if _, ok := params["address"]; ok {
		args.Address = raft.ServerAddress(params.Get("address"))
	} else {
		resp.WriteHeader(http.StatusBadRequest)
		resp.Write([]byte("Must specify ?address with IP:port of peer to remove"))
		return nil, nil
	}

	var reply struct{}
	if err := s.agent.RPC("Operator.RaftRemovePeerByAddress", &args, &reply); err != nil {
		return nil, err
	}
	return nil, nil
}