package infrastructure

import (
	"context"
	"encoding/json"
	"errors"
	"time"

	oclib "cloud.o-forge.io/core/oc-lib"
	"cloud.o-forge.io/core/oc-lib/dbs"
	"cloud.o-forge.io/core/oc-lib/models/peer"
	"cloud.o-forge.io/core/oc-lib/models/resources"
	"cloud.o-forge.io/core/oc-lib/tools"
)

func (ps *PubSubService) searchResponsePublishEvent(
	ctx context.Context,
	dt *tools.DataType,
	user string,
	peerID string,
	payload []byte,
) error {
	return ps.publishEvent(ctx, dt, SEARCH_RESPONSE, user, peerID, payload, true)
}

func (ps *PubSubService) SearchPublishEvent(
	ctx context.Context,
	dt *tools.DataType,
	typ string,
	user string,
	search string,
) error {
	switch typ {
	case "partner":
		ps.searchPartnersPublishEvent(
			ctx, dt, user, search,
		)
	case "all":
		b, err := json.Marshal(map[string]string{
			"search": search,
		})
		if err != nil {
			return err
		}
		ps.searchPublishEvent(
			ctx, dt, user, "", b,
		)
	case "known":
		ps.searchKnownPublishEvent(
			ctx, dt, user, search,
		)
	default:
		return errors.New("no type of research found")
	}
	return nil
}

func (ps *PubSubService) searchPartnersPublishEvent(
	ctx context.Context,
	dt *tools.DataType,
	user string,
	search string,
) error {
	access := oclib.NewRequestAdmin(oclib.LibDataEnum(oclib.PEER), "", "", []string{}, nil)
	f := &dbs.Filters{
		And: map[string][]dbs.Filter{ // search by name if no filters are provided
			"state":    {{Operator: dbs.EQUAL.String(), Value: peer.ONLINE.EnumIndex()}},
			"relation": {{Operator: dbs.EQUAL.String(), Value: peer.PARTNER.EnumIndex()}},
		},
	}
	if search != "" {
		f.Or = map[string][]dbs.Filter{ // filter by like name, short_description, description, owner, url if no filters are provided
			"abstractintanciatedresource.abstractresource.abstractobject.name":       {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.type":                      {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.short_description":         {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.description":               {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.owners.name":               {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.abstractobject.creator_id": {{Operator: dbs.EQUAL.String(), Value: search}},
		}
	}
	b, err := json.Marshal(map[string]string{
		"search": search,
	})
	if err != nil {
		return err
	}
	peersKnown := access.Search(f, "", false)
	for _, known := range peersKnown.Data {
		if err := ps.searchPublishEvent(ctx, dt, user, known.GetID(), b); err != nil {
			return err
		}
	}
	return nil
}

func (ps *PubSubService) searchKnownPublishEvent(
	ctx context.Context,
	dt *tools.DataType,
	user string,
	search string,
) error {
	access := oclib.NewRequestAdmin(oclib.LibDataEnum(oclib.PEER), "", "", []string{}, nil)
	f := &dbs.Filters{
		And: map[string][]dbs.Filter{ // search by name if no filters are provided
			"state": {{Operator: dbs.EQUAL.String(), Value: peer.ONLINE.EnumIndex()}},
			"relation": {{Operator: dbs.NOT.String(), Value: &dbs.Filters{
				And: map[string][]dbs.Filter{
					"relation": {{Operator: dbs.EQUAL.String(), Value: peer.BLACKLIST.EnumIndex()}},
				},
			}}},
		},
	}
	if search != "" {
		f.Or = map[string][]dbs.Filter{ // filter by like name, short_description, description, owner, url if no filters are provided
			"abstractintanciatedresource.abstractresource.abstractobject.name":       {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.type":                      {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.short_description":         {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.description":               {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.owners.name":               {{Operator: dbs.LIKE.String(), Value: search}},
			"abstractintanciatedresource.abstractresource.abstractobject.creator_id": {{Operator: dbs.EQUAL.String(), Value: search}},
		}
	}
	b, err := json.Marshal(map[string]string{
		"search": search,
	})
	if err != nil {
		return err
	}
	peersKnown := access.Search(f, "", false)
	for _, known := range peersKnown.Data {
		if err := ps.searchPublishEvent(ctx, dt, user, known.GetID(), b); err != nil {
			return err
		}
	}
	return nil
}

func (ps *PubSubService) searchPublishEvent(
	ctx context.Context,
	dt *tools.DataType,
	user string,
	peerID string,
	payload []byte,
) error {
	id, err := oclib.GenerateNodeID()
	if err != nil {
		return err
	}
	ps.SearchStream[user] = make(chan resources.ResourceInterface, 128)          // set up the searchStream
	if err := ps.subscribeEvents(ctx, dt, SEARCH_RESPONSE, id, 60); err != nil { // TODO Catpure Event !
		return err
	}
	return ps.publishEvent(ctx, dt, SEARCH, user, peerID, payload, false)
}

func (ps *PubSubService) CreatePublishEvent(
	ctx context.Context,
	dt *tools.DataType,
	user string,
	payload []byte,
) error {
	id, err := oclib.GenerateNodeID()
	if err != nil {
		return err
	}
	return ps.publishEvent(ctx, dt, CREATE, user, id, payload, false)
}

func (ps *PubSubService) UpdatePublishEvent(
	ctx context.Context,
	dt *tools.DataType,
	user string,
	payload []byte,
) error {
	id, err := oclib.GenerateNodeID()
	if err != nil {
		return err
	}
	return ps.publishEvent(ctx, dt, UPDATE, user, id, payload, false)
}

func (ps *PubSubService) DeletePublishEvent(
	ctx context.Context,
	dt *tools.DataType,
	user string,
	payload []byte,
) error {
	id, err := oclib.GenerateNodeID()
	if err != nil {
		return err
	}
	return ps.publishEvent(ctx, dt, DELETE, user, id, payload, false)
}

func (ps *PubSubService) publishEvent(
	ctx context.Context,
	dt *tools.DataType,
	action PubSubAction,
	user string,
	peerID string,
	payload []byte,
	chanNamedByDt bool,
) error {
	name := "oc-catalog." + action.String() + "#" + peerID
	if chanNamedByDt && dt != nil { // if a datatype is precised then : app.action.datatype#peerID
		name = "oc-catalog." + action.String() + "." + (*dt).String() + "#" + peerID
	}

	from, err := oclib.GenerateNodeID()
	if err != nil {
		return err
	}
	evt := Event{
		Type:      name,
		From:      from,
		User:      user,
		Timestamp: time.Now().Unix(),
		Payload:   payload,
	}
	if dt != nil {
		evt.DataType = int64(dt.EnumIndex())
	} else {
		evt.DataType = -1
	}

	body, _ := json.Marshal(evt)
	priv, err := LoadKeyFromFile(false)
	if err != nil {
		return err
	}
	sig, _ := priv.Sign(body)
	evt.Signature = sig

	msg, _ := json.Marshal(evt)

	topic, err := ps.PS.Join(name)
	if err != nil {
		return err
	}

	return topic.Publish(ctx, msg)
}

// TODO REVIEW PUBLISHING + ADD SEARCH ON PUBLIC : YES
// TODO : Search should verify DataType