package mail

import (
	"crypto/tls"
	"fmt"
	"net/smtp"

	"qmail/internal/config"
)

func SendMail(server *config.Server, from string, to []string, data []byte) error {
	fmt.Println("Send...")
	if server.Host == "" || server.Port == 0 {
		return fmt.Errorf("invalide server host or port")
	}

	fmt.Printf("Dial:%s:%d\n", server.Host, server.Port)
	// Connect to the remote SMTP server.

	c, err := smtp.Dial(fmt.Sprintf("%s:%d", server.Host, server.Port))
	if err != nil {
		return err
	}

	fmt.Println("omg")
	if server.UseTLS {
		fmt.Println("start TLS")
		err = c.StartTLS(&tls.Config{
			InsecureSkipVerify: true,
		})
		if err != nil {
			return err
		}
	}

	if server.Auth != nil {
		fmt.Println("Auth")
		auth := smtp.PlainAuth("", server.Auth.Login, server.Auth.Password, server.Host)
		err = c.Auth(auth)
		if err != nil {
			return err
		}
	}

	if from == "" {
		from = server.From
	}

	if from == "" {
		return fmt.Errorf("From not set")
	}

	fmt.Printf("Set from: %s\n", from)
	// Set the sender and recipient first
	if err := c.Mail(from); err != nil {
		return err
	}

	if len(to) == 0 {
		to = []string{server.To}
	}

	if len(to) == 0 {
		return fmt.Errorf("To not set")
	}

	for _, tt := range to {
		if err := c.Rcpt(tt); err != nil {
			return err
		}
	}

	// Send the email body.
	wc, err := c.Data()
	if err != nil {
		return err
	}

	fmt.Printf("Send data")
	_, err = wc.Write(data)
	if err != nil {
		return err
	}

	err = wc.Close()
	if err != nil {
		return err
	}

	fmt.Println("Code connection")
	// Send the QUIT command and close the connection.
	err = c.Quit()
	if err != nil {
		return err
	}

	fmt.Println("Done")
	return nil
}