/*
   GoToSocial
   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Affero General Public License for more details.

   You should have received a copy of the GNU Affero General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package email

import (
	"bytes"
	"net/smtp"
)

const (
	resetTemplate = "email_reset.tmpl"
	resetSubject  = "Subject: GoToSocial Password Reset"
)

func (s *sender) SendResetEmail(toAddress string, data ResetData) error {
	buf := &bytes.Buffer{}
	if err := s.template.ExecuteTemplate(buf, resetTemplate, data); err != nil {
		return err
	}
	resetBody := buf.String()

	msg := assembleMessage(resetSubject, resetBody, toAddress, s.from)
	return smtp.SendMail(s.hostAddress, s.auth, s.from, []string{toAddress}, msg)
}

// ResetData represents data passed into the reset email address template.
type ResetData struct {
	// Username to be addressed.
	Username string
	// URL of the instance to present to the receiver.
	InstanceURL string
	// Name of the instance to present to the receiver.
	InstanceName string
	// Link to present to the receiver to click on and begin the reset process.
	// Should be a full link with protocol eg., https://example.org/reset_password?token=some-reset-password-token
	ResetLink string
}