package netmap

import (
	"context"
	"errors"
	"fmt"

	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
)

var errFailedToRemovePeerWithoutNotary = errors.New("peer can be forcefully removed only in notary environment")

// AddPeerPrm groups parameters of AddPeer operation.
type AddPeerPrm struct {
	nodeInfo netmap.NodeInfo

	client.InvokePrmOptional
}

// SetNodeInfo sets new peer NodeInfo.
func (a *AddPeerPrm) SetNodeInfo(nodeInfo netmap.NodeInfo) {
	a.nodeInfo = nodeInfo
}

// AddPeer registers peer in FrostFS network through
// Netmap contract call.
func (c *Client) AddPeer(ctx context.Context, p AddPeerPrm) error {
	method := addPeerMethod

	if c.client.WithNotary() && c.client.IsAlpha() {
		// In notary environments Alphabet must calls AddPeerIR method instead of AddPeer.
		// It differs from AddPeer only by name, so we can do this in the same form.
		// See https://github.com/nspcc-dev/frostfs-contract/issues/154.
		method += "IR"
	}

	prm := client.InvokePrm{}
	prm.SetMethod(method)
	prm.SetArgs(p.nodeInfo.Marshal())
	prm.InvokePrmOptional = p.InvokePrmOptional

	if _, err := c.client.Invoke(ctx, prm); err != nil {
		return fmt.Errorf("invoke method (%s): %w", method, err)
	}
	return nil
}

// ForceRemovePeer marks the given peer as offline via a notary control transaction.
// If vub > 0, vub will be used as valid until block value.
func (c *Client) ForceRemovePeer(ctx context.Context, nodeInfo netmap.NodeInfo, vub uint32) (uint32, error) {
	if !c.client.WithNotary() {
		return 0, errFailedToRemovePeerWithoutNotary
	}

	prm := UpdatePeerPrm{}
	prm.SetKey(nodeInfo.PublicKey())
	prm.SetControlTX(true)
	prm.SetVUB(vub)

	res, err := c.UpdatePeerState(ctx, prm)
	if err != nil {
		return 0, fmt.Errorf("updating peer state: %v", err)
	}
	return res.VUB, nil
}