package models

import (
	"fmt"

	"github.com/go-mail/mail/v2"
)

type Email struct {
	To      string
	Subject string
	Text    string
	Html    string
}

type EmailService struct {
	DefaultSender string

	dialer *mail.Dialer
}

func NewEmailService(host string, port int, username, pass, sender string) *EmailService {
	es := EmailService{
		dialer:        mail.NewDialer(host, port, username, pass),
		DefaultSender: sender,
	}
	return &es
}

func (es *EmailService) Send(email Email) error {
	msg := mail.NewMessage()

	msg.SetHeader("To", email.To)
	msg.SetHeader("From", es.DefaultSender)
	msg.SetHeader("Subject", email.Subject)

	if email.Html != "" && email.Text != "" {
		msg.SetBody("text/plain", email.Text)
		msg.AddAlternative("text/html", email.Html)
	} else if email.Text != "" {
		msg.SetBody("text/plain", email.Text)
	} else if email.Html != "" {
		msg.SetBody("text/html", email.Html)
	}

	err := es.dialer.DialAndSend(msg)
	if err != nil {
		return fmt.Errorf("send: %w", err)
	}
	return nil
}

func (es *EmailService) SendPasswordReset(to, resetURL string) error {
	email := Email{
		Subject: "Reset your password",
		To:      to,
		Text:    "To reset your password, please visit the following link: " + resetURL,
		Html:    `<p>To reset your password, please visit the following link: <a href="` + resetURL + `">` + resetURL + `</a></p>`,
	}
	err := es.Send(email)
	if err != nil {
		return fmt.Errorf("forgot password email: %w", err)
	}
	return nil
}