package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"net/url"
	"strings"
	"time"
)

func stopAlerting(deveui string) {
	myurl := fmt.Sprintf("https://proxy1.lpn.swisscom.ch/thingpark/lrc/rest/downlink?DevEUI=%s&FPort=2&Payload=0201", deveui)

	req, err := http.NewRequest("POST", myurl, nil)
	if err != nil {
		log.Fatal("Error reading request. ", err)
	}

	req.Header.Set("Content-type", "application/x-www-form-urlencoded")

	client := &http.Client{Timeout: time.Second * 10}

	resp, err := client.Do(req)
	if err != nil {
		log.Fatal("Error reading response. ", err)
	}
	defer resp.Body.Close()

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Fatal("Error reading body. ", err)
	}

	fmt.Printf("%s\n", body)
}

func sendSMS(phonenumber string, alertMessage string) {
	myurl := fmt.Sprintf("https://api.smsapi.com/sms.do?to=%s&message=%s&from=wo-bisch&format=json", phonenumber, url.QueryEscape(alertMessage))

	req, err := http.NewRequest("GET", myurl, nil)
	if err != nil {
		log.Fatal("Error reading request. ", err)
	}

	req.Header.Set("Authorization", "Bearer IQ4vRG2JvNOmYmrYz6RuSwAanYZgd2hHGwtN62kq")

	client := &http.Client{Timeout: time.Second * 10}

	resp, err := client.Do(req)
	if err != nil {
		log.Fatal("Error reading response. ", err)
	}
	defer resp.Body.Close()

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Fatal("Error reading body. ", err)
	}

	fmt.Printf("%s\n", body)
}

func sendAlert(deveui string, alertMessage string) {
	fmt.Printf("sendAlert: deveui=%s, message=%s\n", deveui, alertMessage)
	smsnumber := getSmsnumber(deveui)
	smsalarmactive := getDevSmsAlarmactive(deveui)
	fmt.Printf("sendAlert: deveui=%s, smsnumber=%s, smsalarmactive=%s\n", deveui, smsnumber, smsalarmactive)
	if (smsnumber != "") && (smsalarmactive == "1") {
		// we strip of the leading +
		smsnumber = strings.Replace(smsnumber, "+", "", -1)
		sendSMS(smsnumber, alertMessage)
	}
	email := getEmail(deveui)
	emailalarmactive := getDevEmailAlarmactive(deveui)
	fmt.Printf("sendAlert: deveui=%s, email=%s, emailalarmactive=%s\n", deveui, email, emailalarmactive)
	if emailalarmactive == "1" {
		emails := strings.Split(email, ",")
		for _, em := range emails {
			sendEmail(em, alertMessage)
		}
	}
}

func DispatchAlert(deveui string, alertType string) {
	// first let's stop the alerting cyle on the Lora Network (every minute for one hour!) if button was pressed
	alertMessage := "Unknown alertType"
	if alertType == "alert_button" {
		stopAlerting(deveui)
	}

	// we check if deveui exists
	if !(checkDevExists(deveui)) {
		fmt.Printf("Error: Deveui %s does not exist!", deveui)
		return
	}

	// then we check if it expired
	if AboExpired(deveui) {
		fmt.Printf("Error: Abo for Deveui %s is expired!", deveui)
		return
	}

	// then we check that an alert was not already sent out recently
	if AlertAlreadySentRecently(deveui, alertType) {
		fmt.Printf("Error: Alert for Deveui %s has already been sent!", deveui)
		return
	}

	// then we make an entry that an alert was sent, this will expire automatically
	AddAlertAlreadySentRecently(deveui, alertType)

	// then we send the alert
	if alertType == "alert_button" {
		alertMessage = fmt.Sprintf("Alarm (%s): Knopf gedrueckt, %s", getDevAlias(deveui), time.Now().Format("02.01.2006 15:04:05"))
	} else if alertType == "alert_greenzone" {
		alertMessage = fmt.Sprintf("Alarm (%s): Gruene Zone wurde verlassen, %s", getDevAlias(deveui), time.Now().Format("02.01.2006 15:04:05"))
	}
	sendAlert(deveui, alertMessage)
}