package notifiers

import (
	"bytes"
	"fmt"
	"github.com/hunterlong/statup/utils"
	"net/http"
	"time"
)

const (
	SLACK_ID     = 2
	SLACK_METHOD = "slack"
)

var (
	slacker       *Slack
	slackMessages []string
)

type Slack struct {
	*Notification
}

// DEFINE YOUR NOTIFICATION HERE.
func init() {
	slacker = &Slack{&Notification{
		Id:     SLACK_ID,
		Method: SLACK_METHOD,
		Host:   "https://webhooksurl.slack.com/***",
		Form: []NotificationForm{{
			id:          2,
			Type:        "text",
			Title:       "Incoming Webhook Url",
			Placeholder: "Insert your Slack webhook URL here.",
			DbField:     "Host",
		}}},
	}
	add(slacker)
}

// Select Obj
func (u *Slack) Select() *Notification {
	return u.Notification
}

// WHEN NOTIFIER LOADS
func (u *Slack) Init() error {

	err := u.Install()

	if err == nil {
		notifier, _ := SelectNotification(u.Id)
		forms := u.Form
		u.Notification = notifier
		u.Form = forms
		if u.Enabled {
			go u.Run()
		}
	}

	return err
}

// AFTER NOTIFIER LOADS, IF ENABLED, START A QUEUE PROCESS
func (u *Slack) Run() error {
	for _, msg := range slackMessages {
		utils.Log(1, fmt.Sprintf("Sending JSON to Slack Webhook: %v", msg))
		client := http.Client{Timeout: 15 * time.Second}
		_, err := client.Post("https://hooks.slack.com/services/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", "application/json", bytes.NewBuffer([]byte(msg)))
		if err != nil {
			utils.Log(3, fmt.Sprintf("Issue sending Slack notification: %v", err))
		}
		slackMessages = uniqueMessages(slackMessages, msg)
	}
	time.Sleep(60 * time.Second)
	if u.Enabled {
		u.Run()
	}
	return nil
}

// CUSTOM FUNCTION FO SENDING SLACK MESSAGES
func SendSlack(msg string) error {
	//if slackUrl == "" {
	//	return errors.New("Slack Webhook URL has not been set in settings")
	//}
	fullMessage := fmt.Sprintf("{\"text\":\"%v\"}", msg)
	slackMessages = append(slackMessages, fullMessage)
	return nil
}

// ON SERVICE FAILURE, DO YOUR OWN FUNCTIONS
func (u *Slack) OnFailure() error {
	if u.Enabled {
		utils.Log(1, fmt.Sprintf("Notification %v is receiving a failure notification.", u.Method))
		// Do failing stuff here!
	}
	return nil
}

// ON SERVICE SUCCESS, DO YOUR OWN FUNCTIONS
func (u *Slack) OnSuccess() error {
	if u.Enabled {
		utils.Log(1, fmt.Sprintf("Notification %v is receiving a successful notification.", u.Method))
		// Do checking or any successful things here
	}
	return nil
}

// ON SAVE OR UPDATE OF THE NOTIFIER FORM
func (u *Slack) OnSave() error {
	utils.Log(1, fmt.Sprintf("Notification %v is receiving updated information.", u.Method))

	// Do updating stuff here

	return nil
}

// ON SERVICE FAILURE, DO YOUR OWN FUNCTIONS
func (u *Slack) Install() error {
	inDb, err := slacker.Notification.isInDatabase()
	if !inDb {
		newNotifer, err := InsertDatabase(u.Notification)
		if err != nil {
			utils.Log(3, err)
			return err
		}
		utils.Log(1, fmt.Sprintf("new notifier #%v installed: %v", newNotifer, u.Method))
	}
	return err
}