package app

import (
	"bytes"
	"fmt"
	"log"
	"net/smtp"
	"os"
	"strconv"
	"text/template"
)

const CONFIG_SMTP_HOST = "smtp.gmail.com"
const CONFIG_SMTP_PORT = 587
const CONFIG_SENDER_NAME = "HIS <hats.nutech@gmail.com>"
const CONFIG_AUTH_EMAIL = "hats.nutech@gmail.com"
const CONFIG_AUTH_PASSWORD = "lbfjfuywqktkexij"

type MailConfig struct {
	SMTPHost       string
	SMTPPort       int
	SMTPSenderName string
	AuthEmail      string
	AuthPassword   string
}

func Mail() *MailConfig {
	// dialer := gomail.NewDialer(
	// 	CONFIG_SMTP_HOST,
	// 	CONFIG_SMTP_PORT,
	// 	CONFIG_AUTH_EMAIL,
	// 	CONFIG_AUTH_PASSWORD,
	// )

	port, err := strconv.Atoi(os.Getenv("SMTP_PORT"))
	if err != nil {
		fmt.Println("error parsing to int", err.Error())
	}

	return &MailConfig{
		SMTPHost:       os.Getenv("SMTP_HOST"),
		SMTPPort:       port,
		SMTPSenderName: os.Getenv("SMTP_SENDER"),
		AuthEmail:      os.Getenv("AUTH_EMAIL"),
		AuthPassword:   os.Getenv("AUTH_PASSWORD"),
	}
}

func SendEmail(to []string, cc []string, subject, message string) error {
	tmpl, err := template.ParseFiles("template/test.html")
	if err != nil {
		log.Fatalf("Error parsing template: %v", err)
	}

	fmt.Println("qwqwqw", os.Getenv("PORT"))

	type Data struct {
		Name    string
		Company string
	}

	data := Data{Name: "Salwa Balqis Sulaeman", Company: "HIS"}

	var buf bytes.Buffer
	if err := tmpl.Execute(&buf, data); err != nil {
		log.Fatalf("Error executing template: %v", err)
	}

	// content, err := os.ReadFile("template/test.html")
	// if err != nil {
	// 	fmt.Println("Error reading file:", err)
	// 	return err
	// }

	htmlString := buf.String()

	sender := "From: " + Mail().SMTPSenderName + "\n"
	subjectt := "Subject: 👋 Hello from Go\n"
	mime := "MIME-version: 1.0;\nContent-Type: text/html; charset=\"UTF-8\";\n\n"
	body := htmlString
	messages := []byte(sender + subjectt + mime + body)

	auth := smtp.PlainAuth("", Mail().AuthEmail, Mail().AuthPassword, Mail().SMTPHost)
	smtpAddr := fmt.Sprintf("%s:%d", Mail().SMTPHost, Mail().SMTPPort)
	fmt.Println("cek dong", Mail())

	err = smtp.SendMail(smtpAddr, auth, Mail().AuthEmail, append(to, cc...), messages)
	if err != nil {
		return err
	}

	return nil
}