package alerting

import (
	"github.com/grafana/grafana/pkg/bus"
	"github.com/grafana/grafana/pkg/components/simplejson"
	"github.com/grafana/grafana/pkg/log"
	m "github.com/grafana/grafana/pkg/models"
	"github.com/grafana/grafana/pkg/services/alerting/alertstates"
)

type NotifierImpl struct {
	log log.Logger
}

func NewNotifier() *NotifierImpl {
	return &NotifierImpl{
		log: log.New("alerting.notifier"),
	}
}

func (n *NotifierImpl) Notify(alertResult *AlertResult) {
	n.log.Warn("LETS NOTIFY!!!!A")
	notifiers := n.getNotifiers(alertResult.AlertJob.Rule.OrgId, []int64{1, 2})

	for _, notifier := range notifiers {

		warn := alertResult.State == alertstates.Warn && notifier.SendWarning
		crit := alertResult.State == alertstates.Critical && notifier.SendCritical
		n.log.Warn("looopie", "warn", warn, "crit", crit)
		if warn || crit {
			n.log.Info("Sending notification", "state", alertResult.State, "type", notifier.Type)
			go notifier.Notifierr.Notify(alertResult)
		}
	}

}

type Notification struct {
	Name         string
	Type         string
	SendWarning  bool
	SendCritical bool

	Notifierr Notifierr
}

type EmailNotifier struct {
	To   string
	From string
	log  log.Logger
}

func (this *EmailNotifier) Notify(alertResult *AlertResult) {
	//bus.dispath to notification package in grafana
	this.log.Info("Sending email")
}

type WebhookNotifier struct {
	Url          string
	AuthUser     string
	AuthPassword string
	log          log.Logger
}

func (this *WebhookNotifier) Notify(alertResult *AlertResult) {
	//bus.dispath to notification package in grafana
	this.log.Info("Sending webhook")
}

type Notifierr interface {
	Notify(alertResult *AlertResult)
}

func (n *NotifierImpl) getNotifiers(orgId int64, notificationGroups []int64) []*Notification {
	query := &m.GetAlertNotificationQuery{
		OrgID: orgId,
		Ids:   notificationGroups,
	}
	err := bus.Dispatch(query)
	if err != nil {
		n.log.Error("Failed to read notifications", "error", err)
	}

	var result []*Notification

	n.log.Warn("query result", "length", len(query.Result))
	for _, notification := range query.Result {
		not, err := NewNotificationFromDBModel(notification)
		if err == nil {
			result = append(result, not)
		}
	}

	return result
}

func NewNotificationFromDBModel(model *m.AlertNotification) (*Notification, error) {
	return &Notification{
		Name:         model.Name,
		Type:         model.Type,
		Notifierr:    createNotifier(model.Type, model.Settings),
		SendCritical: !model.Settings.Get("ignoreCrit").MustBool(),
		SendWarning:  !model.Settings.Get("ignoreWarn").MustBool(),
	}, nil
}

var createNotifier = func(notificationType string, settings *simplejson.Json) Notifierr {
	if notificationType == "email" {
		return &EmailNotifier{
			To:   settings.Get("to").MustString(),
			From: settings.Get("from").MustString(),
			log:  log.New("alerting.notification.email"),
		}
	}

	return &WebhookNotifier{
		Url:          settings.Get("url").MustString(),
		AuthUser:     settings.Get("user").MustString(),
		AuthPassword: settings.Get("password").MustString(),
		log:          log.New("alerting.notification.webhook"),
	}
}