package views

import (
	"net/url"

	"git.capotej.com/capotej/communique/models"
	"git.capotej.com/capotej/communique/urls"
	"github.com/go-fed/activity/streams"
	"github.com/go-fed/activity/streams/vocab"
)

func activityObjectNote(name, domain string, v models.OutboxItem) (vocab.ActivityStreamsNote, error) {
	var err error
	note := streams.NewActivityStreamsNote()

	noteUrl, err := urls.UrlNote(name, domain, string(v.Id))
	if err != nil {
		return nil, err
	}
	noteIdProp := streams.NewJSONLDIdProperty()
	noteIdProp.Set(noteUrl)
	note.SetJSONLDId(noteIdProp)
	contentProp := streams.NewActivityStreamsContentProperty()
	contentProp.AppendXMLSchemaString(string(v.Content))
	note.SetActivityStreamsContent(contentProp)

	actorUrl, err := urls.UrlProfile(name, domain)
	if err != nil {
		return nil, err
	}
	attrProp := streams.NewActivityStreamsAttributedToProperty()
	attrProp.AppendIRI(actorUrl)
	note.SetActivityStreamsAttributedTo(attrProp)

	summaryProp := streams.NewActivityStreamsSummaryProperty()
	summaryProp.AppendXMLSchemaString("")
	note.SetActivityStreamsSummary(summaryProp)

	noteUrlProp := streams.NewActivityStreamsUrlProperty()
	noteUrlProp.AppendIRI(noteUrl)
	note.SetActivityStreamsUrl(noteUrlProp)

	publicUrl, err := url.Parse("https://www.w3.org/ns/activitystreams#Public")
	if err != nil {
		return nil, err
	}
	toProp := streams.NewActivityStreamsToProperty()
	toProp.AppendIRI(publicUrl)
	note.SetActivityStreamsTo(toProp)

	publishedProp := streams.NewActivityStreamsPublishedProperty()
	publishedProp.Set(v.CreatedAt)
	note.SetActivityStreamsPublished(publishedProp)
	return note, err
}

func activityObjectCreate(name, domain string, v models.OutboxItem, note vocab.ActivityStreamsNote) (vocab.ActivityStreamsCreate, error) {
	var err error
	crea := streams.NewActivityStreamsCreate()
	obj := streams.NewActivityStreamsObjectProperty()

	creaIdProp := streams.NewJSONLDIdProperty()
	activityUrl, err := urls.UrlActivity(name, domain, string(v.Id))
	if err != nil {
		return nil, err
	}
	creaIdProp.Set(activityUrl)
	crea.SetJSONLDId(creaIdProp)

	crea.SetActivityStreamsObject(obj)

	publicUrl, err := url.Parse("https://www.w3.org/ns/activitystreams#Public")
	if err != nil {
		return nil, err
	}
	toProp := streams.NewActivityStreamsToProperty()
	toProp.AppendIRI(publicUrl)
	crea.SetActivityStreamsTo(toProp)

	publishedProp := streams.NewActivityStreamsPublishedProperty()
	publishedProp.Set(v.CreatedAt)
	crea.SetActivityStreamsPublished(publishedProp)

	actorUrl, err := urls.UrlProfile(name, domain)
	if err != nil {
		return nil, err
	}
	actorProp := streams.NewActivityStreamsActorProperty()
	actorProp.AppendIRI(actorUrl)
	crea.SetActivityStreamsActor(actorProp)
	obj.AppendActivityStreamsNote(note)

	return crea, err
}

// RenderOutboxCollection takes a page of ActivityStream objects as JSON strings and concatenates them together to return an
// ActivtyStreamsOrderedCollection
func RenderOutboxCollection(name, domain string, page []models.OutboxItem) (map[string]interface{}, error) {
	id, err := urls.UrlOutboxPage(name, domain)
	if err != nil {
		return nil, err
	}

	partOf, err := urls.UrlOutbox(name, domain)
	if err != nil {
		return nil, err
	}
	publicUrl, err := url.Parse("https://www.w3.org/ns/activitystreams#Public")
	if err != nil {
		return nil, err
	}
	toProp := streams.NewActivityStreamsToProperty()
	toProp.AppendIRI(publicUrl)

	oc := streams.NewActivityStreamsOrderedCollectionPage()

	idProp := streams.NewJSONLDIdProperty()
	idProp.Set(id)
	oc.SetJSONLDId(idProp)

	partOfProp := streams.NewActivityStreamsPartOfProperty()
	partOfProp.SetIRI(partOf)
	oc.SetActivityStreamsPartOf(partOfProp)

	itemsProp := streams.NewActivityStreamsOrderedItemsProperty()

	for _, v := range page {
		var err error
		note, err := activityObjectNote(name, domain, v)
		if err != nil {
			return nil, err
		}
		crea, err := activityObjectCreate(name, domain, v, note)
		if err != nil {
			return nil, err
		}

		itemsProp.AppendActivityStreamsCreate(crea)
	}
	oc.SetActivityStreamsOrderedItems(itemsProp)
	return streams.Serialize(oc)
}

func RenderOutbox(name, domain string, totalItems int) (map[string]interface{}, error) {
	id, err := urls.UrlOutbox(name, domain)

	if err != nil {
		return nil, err
	}

	first, err := urls.UrlOutboxPage(name, domain)
	if err != nil {
		return nil, err
	}

	oc := streams.NewActivityStreamsOrderedCollection()

	idProp := streams.NewJSONLDIdProperty()
	idProp.Set(id)
	oc.SetJSONLDId(idProp)

	itemsProp := streams.NewActivityStreamsTotalItemsProperty()
	itemsProp.Set(totalItems)
	oc.SetActivityStreamsTotalItems(itemsProp)

	ocProp := streams.NewActivityStreamsFirstProperty()
	ocProp.SetIRI(first)
	oc.SetActivityStreamsFirst(ocProp)

	return streams.Serialize(oc)
}