package main

import (
	"errors"
	"fmt"
	"log/slog"
	"net/smtp"
	"os"

	"git.nakama.town/fmartingr/smtp2shoutrrr"
)

const (
	configPath = "config.toml"

	// PlainAuth refuses to send credentials over an unencrypted connection
	// unless the host is a loopback address, which is what the development
	// server listens on.
	hostname = "localhost"
)

func main() {
	if err := run(); err != nil {
		slog.Error("sendmail failed", slog.String("err", err.Error()))
		os.Exit(1)
	}
}

func run() error {
	config, err := smtp2shoutrrr.LoadConfig(configPath)
	if err != nil {
		return fmt.Errorf("loading configuration: %w", err)
	}

	slog.Info("Using first recipient configuration to send a test email")

	if len(config.Recipients) == 0 {
		return errors.New("no recipients found in configuration")
	}

	if len(config.Recipients[0].Addresses) == 0 {
		return errors.New("no email addresses found in first recipient configuration")
	}

	auth := smtp.PlainAuth("", config.Username, config.Password, hostname)
	recipients := []string{config.Recipients[0].Addresses[0]}
	msg := []byte("Subject: Test notification\r\n\r\nThis is a test notification")
	from := "hello@localhost"

	return smtp.SendMail(fmt.Sprintf("%s:%d", hostname, config.Port), auth, from, recipients, msg)
}