package email

import (
	"errors"
	"net/mail"
)

type Message struct {
	ReplyTo *mail.Address `json:"replyTo"`

	ID       string
	From     string `json:"from"`
	Subject  string `json:"subject"`
	HtmlBody string `json:"htmlBody"`
	TxtBody  string `json:"txtBody"`

	To  []mail.Address `json:"to"`
	Cc  []mail.Address `json:"cc"`
	Bcc []mail.Address `json:"bcc"`
}

func (m *Message) Validate() error {
	if m == nil {
		return errors.New("email: message is nil")
	}

	if len(m.To) == 0 {
		return errors.New("email: message must have at least one recipient")
	}

	if len(m.From) == 0 {
		return errors.New("email: message must have a sender")
	}

	if len(m.Subject) == 0 {
		return errors.New("email: message must have a subject")
	}

	if len(m.HtmlBody) == 0 && len(m.TxtBody) == 0 {
		return errors.New("email: message must have a body")
	}

	return nil
}