package node

import (
	"context"
	"encoding/json"
	"fmt"
	"oc-discovery/daemons/node/common"
	"oc-discovery/daemons/node/stream"
	"slices"

	oclib "cloud.o-forge.io/core/oc-lib"
	"cloud.o-forge.io/core/oc-lib/config"
	"cloud.o-forge.io/core/oc-lib/tools"
	pp "github.com/libp2p/go-libp2p/core/peer"
	"github.com/libp2p/go-libp2p/core/protocol"
)

type configPayload struct {
	PeerID string `json:"source_peer_id"`
}

type executionConsidersPayload struct {
	PeerIDs []string `json:"peer_ids"`
}

func ListenNATS(n *Node) {
	tools.NewNATSCaller().ListenNats(map[tools.NATSMethod]func(tools.NATSResponse){
		tools.PROPALGATION_EVENT: func(resp tools.NATSResponse) {
			fmt.Println("PROPALGATION")
			if resp.FromApp == config.GetAppName() {
				return
			}
			p, err := oclib.GetMySelf()
			if err != nil || p == nil || p.PeerID != n.PeerID.String() {
				return
			}
			var propalgation tools.PropalgationMessage
			err = json.Unmarshal(resp.Payload, &propalgation)
			var dt *tools.DataType
			if propalgation.DataType > 0 {
				dtt := tools.DataType(propalgation.DataType)
				dt = &dtt
			}
			fmt.Println("PROPALGATION ACT", propalgation.DataType, propalgation.Action, propalgation.Action == tools.PB_CREATE, err)
			if err == nil {
				switch propalgation.Action {
				case tools.PB_ADMIRALTY_CONFIG, tools.PB_MINIO_CONFIG:
					var m configPayload
					var proto protocol.ID = stream.ProtocolAdmiraltyConfigResource
					if propalgation.Action == tools.PB_MINIO_CONFIG {
						proto = stream.ProtocolMinioConfigResource
					}
					if err := json.Unmarshal(propalgation.Payload, &m); err == nil {
						peers, _ := n.GetPeerRecord(context.Background(), m.PeerID)
						for _, p := range peers {
							n.StreamService.PublishCommon(&resp.Datatype, resp.User, resp.Groups,
								p.PeerID, proto, propalgation.Payload)
						}
					}
				case tools.PB_CREATE, tools.PB_UPDATE, tools.PB_DELETE:
					if slices.Contains([]tools.DataType{tools.BOOKING, tools.PURCHASE_RESOURCE}, resp.Datatype) {
						m := map[string]interface{}{}
						if err := json.Unmarshal(propalgation.Payload, &m); err == nil {
							if m["peer_id"] != nil {
								n.StreamService.PublishCommon(&resp.Datatype, resp.User, resp.Groups,
									fmt.Sprintf("%v", m["peer_id"]), stream.ProtocolCreateResource, propalgation.Payload)
							}
						}
					} else {
						fmt.Println(n.StreamService.ToPartnerPublishEvent(
							context.Background(),
							propalgation.Action,
							dt, resp.User, resp.Groups,
							propalgation.Payload,
						))
					}
				case tools.PB_CONSIDERS:
					switch resp.Datatype {
					case tools.BOOKING, tools.PURCHASE_RESOURCE, tools.WORKFLOW_EXECUTION:
						var m executionConsidersPayload
						if err := json.Unmarshal(propalgation.Payload, &m); err == nil {
							for _, p := range m.PeerIDs {
								peers, _ := n.GetPeerRecord(context.Background(), p)
								for _, pp := range peers {
									n.StreamService.PublishCommon(&resp.Datatype, resp.User, resp.Groups,
										pp.PeerID, stream.ProtocolConsidersResource, propalgation.Payload)
								}
							}
						}
					default:
						// minio / admiralty config considers — route back to OriginID.
						var m struct {
							OriginID string `json:"origin_id"`
						}
						if err := json.Unmarshal(propalgation.Payload, &m); err == nil && m.OriginID != "" {
							peers, _ := n.GetPeerRecord(context.Background(), m.OriginID)
							for _, p := range peers {
								n.StreamService.PublishCommon(nil, resp.User, resp.Groups,
									p.PeerID, stream.ProtocolConsidersResource, propalgation.Payload)
							}
						}
					}
				case tools.PB_PLANNER:
					m := map[string]interface{}{}
					if err := json.Unmarshal(propalgation.Payload, &m); err == nil {
						b := []byte{}
						if len(m) > 1 {
							b = propalgation.Payload
						}
						if m["peer_id"] == nil { // send to every active stream
							n.StreamService.Mu.Lock()
							if n.StreamService.Streams[stream.ProtocolSendPlanner] != nil {
								for pid := range n.StreamService.Streams[stream.ProtocolSendPlanner] { // send Planner can be long lived - it's a conn
									n.StreamService.PublishCommon(nil, resp.User, resp.Groups, pid.String(), stream.ProtocolSendPlanner, b)
								}
							}
							n.StreamService.Mu.Unlock()
						} else {
							n.StreamService.PublishCommon(nil, resp.User, resp.Groups, fmt.Sprintf("%v", m["peer_id"]), stream.ProtocolSendPlanner, b)
						}
					}
				case tools.PB_CLOSE_PLANNER:
					m := map[string]interface{}{}
					if err := json.Unmarshal(resp.Payload, &m); err == nil {
						n.StreamService.Mu.Lock()
						if pid, err := pp.Decode(fmt.Sprintf("%v", m["peer_id"])); err == nil {
							if n.StreamService.Streams[stream.ProtocolSendPlanner] != nil && n.StreamService.Streams[stream.ProtocolSendPlanner][pid] != nil {
								n.StreamService.Streams[stream.ProtocolSendPlanner][pid].Stream.Close()
								delete(n.StreamService.Streams[stream.ProtocolSendPlanner], pid)
							}
						}
						n.StreamService.Mu.Unlock()
					}
				case tools.PB_CLOSE_SEARCH:
					if propalgation.DataType == int(tools.PEER) {
						n.peerSearches.Cancel(resp.User)
					} else {
						n.StreamService.ResourceSearches.Cancel(resp.User)
					}
				case tools.PB_SEARCH:
					if propalgation.DataType == int(tools.PEER) {
						m := map[string]interface{}{}
						if err := json.Unmarshal(propalgation.Payload, &m); err == nil {
							needle := fmt.Sprintf("%v", m["search"])
							userKey := resp.User
							go n.SearchPeerRecord(userKey, needle, func(hit common.SearchHit) {
								if b, err := json.Marshal(hit); err == nil {
									tools.NewNATSCaller().SetNATSPub(tools.SEARCH_EVENT, tools.NATSResponse{
										FromApp:  "oc-discovery",
										Datatype: tools.DataType(tools.PEER),
										Method:   int(tools.SEARCH_EVENT),
										Payload:  b,
									})
								}
							})
						}

					} else {
						m := map[string]interface{}{}
						if err := json.Unmarshal(propalgation.Payload, &m); err == nil {
							n.PubSubService.SearchPublishEvent(
								context.Background(),
								dt,
								fmt.Sprintf("%v", m["type"]),
								resp.User, resp.Groups,
								fmt.Sprintf("%v", m["search"]),
							)
						}
					}
				}
			}
		},
	})
}