package protowire

import (
	"github.com/kaspanet/kaspad/app/appmessage"
	"github.com/pkg/errors"
)

type converter interface {
	toAppMessage() (appmessage.Message, error)
}

// ToAppMessage converts a KaspadMessage to its appmessage.Message representation
func (x *KaspadMessage) ToAppMessage() (appmessage.Message, error) {
	appMessage, err := x.Payload.(converter).toAppMessage()
	if err != nil {
		return nil, err
	}
	return appMessage, nil
}

// FromAppMessage creates a KaspadMessage from a appmessage.Message
func FromAppMessage(message appmessage.Message) (*KaspadMessage, error) {
	payload, err := toPayload(message)
	if err != nil {
		return nil, err
	}
	return &KaspadMessage{
		Payload: payload,
	}, nil
}

func toPayload(message appmessage.Message) (isKaspadMessage_Payload, error) {
	p2pPayload, err := toP2PPayload(message)
	if err != nil {
		return nil, err
	}
	if p2pPayload != nil {
		return p2pPayload, nil
	}

	rpcPayload, err := toRPCPayload(message)
	if err != nil {
		return nil, err
	}
	if rpcPayload != nil {
		return rpcPayload, nil
	}

	return nil, errors.Errorf("unknown message type %T", message)
}

func toP2PPayload(message appmessage.Message) (isKaspadMessage_Payload, error) {
	switch message := message.(type) {
	case *appmessage.MsgAddresses:
		payload := new(KaspadMessage_Addresses)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgBlock:
		payload := new(KaspadMessage_Block)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgRequestBlockLocator:
		payload := new(KaspadMessage_RequestBlockLocator)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgBlockLocator:
		payload := new(KaspadMessage_BlockLocator)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgRequestAddresses:
		payload := new(KaspadMessage_RequestAddresses)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgRequestIBDBlocks:
		payload := new(KaspadMessage_RequestIBDBlocks)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgRequestNextIBDBlocks:
		payload := new(KaspadMessage_RequestNextIBDBlocks)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgDoneIBDBlocks:
		payload := new(KaspadMessage_DoneIBDBlocks)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgRequestRelayBlocks:
		payload := new(KaspadMessage_RequestRelayBlocks)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgRequestSelectedTip:
		payload := new(KaspadMessage_RequestSelectedTip)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgRequestTransactions:
		payload := new(KaspadMessage_RequestTransactions)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgTransactionNotFound:
		payload := new(KaspadMessage_TransactionNotFound)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgIBDBlock:
		payload := new(KaspadMessage_IbdBlock)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgInvRelayBlock:
		payload := new(KaspadMessage_InvRelayBlock)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgInvTransaction:
		payload := new(KaspadMessage_InvTransactions)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgPing:
		payload := new(KaspadMessage_Ping)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgPong:
		payload := new(KaspadMessage_Pong)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgSelectedTip:
		payload := new(KaspadMessage_SelectedTip)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgTx:
		payload := new(KaspadMessage_Transaction)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgVerAck:
		payload := new(KaspadMessage_Verack)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgVersion:
		payload := new(KaspadMessage_Version)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.MsgReject:
		payload := new(KaspadMessage_Reject)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	default:
		return nil, nil
	}
}

func toRPCPayload(message appmessage.Message) (isKaspadMessage_Payload, error) {
	switch message := message.(type) {
	case *appmessage.GetCurrentNetworkRequestMessage:
		payload := new(KaspadMessage_GetCurrentNetworkRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetCurrentNetworkResponseMessage:
		payload := new(KaspadMessage_GetCurrentNetworkResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.SubmitBlockRequestMessage:
		payload := new(KaspadMessage_SubmitBlockRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.SubmitBlockResponseMessage:
		payload := new(KaspadMessage_SubmitBlockResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlockTemplateRequestMessage:
		payload := new(KaspadMessage_GetBlockTemplateRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlockTemplateResponseMessage:
		payload := new(KaspadMessage_GetBlockTemplateResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.NotifyBlockAddedRequestMessage:
		payload := new(KaspadMessage_NotifyBlockAddedRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.NotifyBlockAddedResponseMessage:
		payload := new(KaspadMessage_NotifyBlockAddedResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.BlockAddedNotificationMessage:
		payload := new(KaspadMessage_BlockAddedNotification)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetPeerAddressesRequestMessage:
		payload := new(KaspadMessage_GetPeerAddressesRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetPeerAddressesResponseMessage:
		payload := new(KaspadMessage_GetPeerAddressesResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetSelectedTipHashRequestMessage:
		payload := new(KaspadMessage_GetSelectedTipHashRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetSelectedTipHashResponseMessage:
		payload := new(KaspadMessage_GetSelectedTipHashResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetMempoolEntryRequestMessage:
		payload := new(KaspadMessage_GetMempoolEntryRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetMempoolEntryResponseMessage:
		payload := new(KaspadMessage_GetMempoolEntryResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetConnectedPeerInfoRequestMessage:
		payload := new(KaspadMessage_GetConnectedPeerInfoRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetConnectedPeerInfoResponseMessage:
		payload := new(KaspadMessage_GetConnectedPeerInfoResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.AddPeerRequestMessage:
		payload := new(KaspadMessage_AddPeerRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.AddPeerResponseMessage:
		payload := new(KaspadMessage_AddPeerResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.SubmitTransactionRequestMessage:
		payload := new(KaspadMessage_SubmitTransactionRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.SubmitTransactionResponseMessage:
		payload := new(KaspadMessage_SubmitTransactionResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.NotifyChainChangedRequestMessage:
		payload := new(KaspadMessage_NotifyChainChangedRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.NotifyChainChangedResponseMessage:
		payload := new(KaspadMessage_NotifyChainChangedResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.ChainChangedNotificationMessage:
		payload := new(KaspadMessage_ChainChangedNotification)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlockRequestMessage:
		payload := new(KaspadMessage_GetBlockRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlockResponseMessage:
		payload := new(KaspadMessage_GetBlockResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetSubnetworkRequestMessage:
		payload := new(KaspadMessage_GetSubnetworkRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetSubnetworkResponseMessage:
		payload := new(KaspadMessage_GetSubnetworkResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetChainFromBlockRequestMessage:
		payload := new(KaspadMessage_GetChainFromBlockRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetChainFromBlockResponseMessage:
		payload := new(KaspadMessage_GetChainFromBlockResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlocksRequestMessage:
		payload := new(KaspadMessage_GetBlocksRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlocksResponseMessage:
		payload := new(KaspadMessage_GetBlocksResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlockCountRequestMessage:
		payload := new(KaspadMessage_GetBlockCountRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlockCountResponseMessage:
		payload := new(KaspadMessage_GetBlockCountResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlockDAGInfoRequestMessage:
		payload := new(KaspadMessage_GetBlockDagInfoRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetBlockDAGInfoResponseMessage:
		payload := new(KaspadMessage_GetBlockDagInfoResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.ResolveFinalityConflictRequestMessage:
		payload := new(KaspadMessage_ResolveFinalityConflictRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.ResolveFinalityConflictResponseMessage:
		payload := new(KaspadMessage_ResolveFinalityConflictResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.NotifyFinalityConflictsRequestMessage:
		payload := new(KaspadMessage_NotifyFinalityConflictsRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.NotifyFinalityConflictsResponseMessage:
		payload := new(KaspadMessage_NotifyFinalityConflictsResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.FinalityConflictNotificationMessage:
		payload := new(KaspadMessage_FinalityConflictNotification)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.FinalityConflictResolvedNotificationMessage:
		payload := new(KaspadMessage_FinalityConflictResolvedNotification)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetMempoolEntriesRequestMessage:
		payload := new(KaspadMessage_GetMempoolEntriesRequest)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	case *appmessage.GetMempoolEntriesResponseMessage:
		payload := new(KaspadMessage_GetMempoolEntriesResponse)
		err := payload.fromAppMessage(message)
		if err != nil {
			return nil, err
		}
		return payload, nil
	default:
		return nil, nil
	}
}