package main

import (
	"fmt"
	"github.com/wneessen/go-mail"
	"os"
)

func main() {
	// Create a new mail message
	m := mail.NewMsg()

	// To set address header fields like "From", "To", "Cc" or "Bcc" you have different methods
	// at your hands. Some perform input validation, some ignore invalid addresses. Some perform
	// the formating for you.
	// 
	if err := m.FromFormat("Toni Tester", "[email protected]"); err != nil {
		fmt.Printf("failed to set FROM address: %s\n", err)
		os.Exit(1)
	}
	if err := m.To(`"Max Mastermind <[email protected]>"`); err != nil {
		fmt.Printf("failed to set TO address: %s\n", err)
		os.Exit(1)
	}
	m.CcIgnoreInvalid("[email protected]", "invalidaddress+example.com")

	// Set a subject line
	m.Subject("This is a great email")

	// And some other common headers...
	//
	// Sets a valid "Date" header field with the current time
	m.SetDate()
	//
	// Generates a valid and unique "Message-ID"
	m.SetMessageID()
	//
	// Sets the "Precedence"-Header to "bulk" to indicate a "bulk mail"
	m.SetBulk()
	//
	// Set a "high" importance to the mail (this sets several Header fields to 
	// satisfy the different common mail clients like Mail.app and Outlook)
	m.SetImportance(mail.ImportanceHigh)

	// Add your mail message to body
	m.SetBodyString(mail.TypeTextPlain, "This is a great message body text.")

	// Attach a file from your local FS
	// We override the attachment name using the WithFileName() Option
	m.AttachFile("/home/ttester/test.txt", mail.WithFileName("attachment.txt"))

	// Next let's create a Client
	// We have lots of With* options at our disposal to stear the Client. It will set sane
	// options by default, though
	//
	// Let's assume we need to perform SMTP AUTH with the sending server, though. Since we
	// use SMTP PLAIN AUTH, let's also make sure to enforce strong TLS
	host := "relay.example.com"
	c, err := mail.NewClient(host,
		mail.WithSMTPAuth(mail.SMTPAuthPlain), mail.WithUsername("ttester"),
		mail.WithPassword("V3rySecUr3!Pw."), mail.WithTLSPolicy(mail.TLSMandatory))
	if err != nil {
		fmt.Printf("failed to create new mail client: %s\n", err)
		os.Exit(1)
	}

	// Now that we have our client, we can connect to the server and send our mail message
	// via the convenient DialAndSend() method. You have the option to Dial() and Send()
	// seperately as well
	if err := c.DialAndSend(m); err != nil {
		fmt.Printf("failed to send mail: %s\n", err)
		os.Exit(1)
	}

	fmt.Println("Mail successfully sent.")
}