package core

import (
	"fmt"

	"github.com/pkg/errors"

	"github.com/tendermint/tendermint/p2p"
	ctypes "github.com/tendermint/tendermint/rpc/core/types"
	rpctypes "github.com/tendermint/tendermint/rpc/lib/types"
)

// NetInfo returns network info.
// More: https://tendermint.com/rpc/#/Info/net_info
func NetInfo(ctx *rpctypes.Context) (*ctypes.ResultNetInfo, error) {
	out, in, _ := p2pPeers.NumPeers()
	peers := make([]ctypes.Peer, 0, out+in)
	for _, peer := range p2pPeers.Peers().List() {
		nodeInfo, ok := peer.NodeInfo().(p2p.DefaultNodeInfo)
		if !ok {
			return nil, fmt.Errorf("peer.NodeInfo() is not DefaultNodeInfo")
		}
		peers = append(peers, ctypes.Peer{
			NodeInfo:         nodeInfo,
			IsOutbound:       peer.IsOutbound(),
			ConnectionStatus: peer.Status(),
			RemoteIP:         peer.RemoteIP().String(),
		})
	}
	// TODO: Should we include PersistentPeers and Seeds in here?
	// PRO: useful info
	// CON: privacy
	return &ctypes.ResultNetInfo{
		Listening: p2pTransport.IsListening(),
		Listeners: p2pTransport.Listeners(),
		NPeers:    len(peers),
		Peers:     peers,
	}, nil
}

// UnsafeDialSeeds dials the given seeds (comma-separated id@IP:PORT).
func UnsafeDialSeeds(ctx *rpctypes.Context, seeds []string) (*ctypes.ResultDialSeeds, error) {
	if len(seeds) == 0 {
		return &ctypes.ResultDialSeeds{}, errors.New("No seeds provided")
	}
	logger.Info("DialSeeds", "seeds", seeds)
	if err := p2pPeers.DialPeersAsync(seeds); err != nil {
		return &ctypes.ResultDialSeeds{}, err
	}
	return &ctypes.ResultDialSeeds{Log: "Dialing seeds in progress. See /net_info for details"}, nil
}

// UnsafeDialPeers dials the given peers (comma-separated id@IP:PORT),
// optionally making them persistent.
func UnsafeDialPeers(ctx *rpctypes.Context, peers []string, persistent bool) (*ctypes.ResultDialPeers, error) {
	if len(peers) == 0 {
		return &ctypes.ResultDialPeers{}, errors.New("No peers provided")
	}
	logger.Info("DialPeers", "peers", peers, "persistent", persistent)
	if persistent {
		if err := p2pPeers.AddPersistentPeers(peers); err != nil {
			return &ctypes.ResultDialPeers{}, err
		}
	}
	if err := p2pPeers.DialPeersAsync(peers); err != nil {
		return &ctypes.ResultDialPeers{}, err
	}
	return &ctypes.ResultDialPeers{Log: "Dialing peers in progress. See /net_info for details"}, nil
}

// Genesis returns genesis file.
// More: https://tendermint.com/rpc/#/Info/genesis
func Genesis(ctx *rpctypes.Context) (*ctypes.ResultGenesis, error) {
	return &ctypes.ResultGenesis{Genesis: genDoc}, nil
}