package xmpp

import (
	"fmt"

	"dev.narayana.im/narayana/telegabber/telegram"
	"dev.narayana.im/narayana/telegabber/xmpp/gateway"

	log "github.com/sirupsen/logrus"
	"gosrc.io/xmpp"
	"gosrc.io/xmpp/stanza"
)

func setCommandPayloadError(payload *stanza.Command, err string) {
	note := stanza.Note{
		Text: err,
		Type: stanza.CommandNoteTypeErr,
	}
	payload.Status = stanza.CommandStatusCompleted
	payload.CommandElements = append(payload.CommandElements, &note)
}

func loginWizardPayload(bare string, requestForm *stanza.Form, resource string) (payload *stanza.Command, cancelSend bool, returnSession *telegram.Client) {
	payload = &stanza.Command{
		SessionId: "loginwizard",
		Node:      "loginwizard",
	}

	session, ok := sessions[bare]
	if ok {
		returnSession = session

		if requestForm == nil {
			session.StartLoginWizard(false)
			cancelSend = true
		} else {
			if len(requestForm.Fields) != 1 {
				setCommandPayloadError(payload, "Hey, don't tinker with the form!")
				return
			}
			field := requestForm.Fields[0]
			if field != nil {
				if len(field.ValuesList) < 1 {
					setCommandPayloadError(payload, "No value")
					return
				}
				switch field.Var {
				case "login", "code", "password":
				default:
					setCommandPayloadError(payload, "Unknown field")
					return
				}

				session.StartLoginWizard(true)
				response, success := session.ProcessTransportCommand(fmt.Sprintf("/%v %v", field.Var, field.ValuesList[0]), resource)
				if !success {
					setCommandPayloadError(payload, response)
					session.StopLoginWizard()
					return
				}

				cancelSend = true
			}
		}
	} else {
		setCommandPayloadError(payload, fmt.Sprintf("Session is not initialized, add the transport (%v) to contacts first", gateway.Jid.Bare()))
	}

	return
}

func sendLoginWizardResponse(component *xmpp.Component, answer *stanza.IQ, session *telegram.Client) {
	payload := &stanza.Command{
		SessionId: "loginwizard",
		Node:      "loginwizard",
	}

	nextStage := "login"
	if session != nil {
		nextStage = session.GetLoginWizardNextStage()
	}
	log.Debugf("nextStage: %v", nextStage)

	if nextStage == "cancel" {
		setCommandPayloadError(payload, "Cancelled")
		session.StopLoginWizard()
	} else if nextStage == "success" {
		payload.Status = stanza.CommandStatusCompleted
		session.StopLoginWizard()
	} else {
		required := ""
		form := stanza.Form{
			Type:  stanza.FormTypeForm,
			Title: "Login Wizard",
			Fields: []*stanza.Field{
				&stanza.Field{
					Var:      nextStage,
					Label:    nextStage,
					Required: &required,
				},
			},
		}
		payload.Status = stanza.CommandStatusExecuting
		payload.CommandElements = append(payload.CommandElements, &form)
	}

	answer.Payload = payload

	gateway.ResumableSend(component, answer)
}