package mailer_test

import (
	"crypto/sha256"
	"fmt"

	"git.bivouac.wiki/use/mailer"
)

// UnsubFunc creates a code for the user to manage their email preferences
func UnsubFunc(user string) string {
	// you could also just as well store random UUIDs in a KV...
	salt := "example_code"
	h := sha256.New()
	// the important part is not being able to reverse the username from the code
	h.Write([]byte(user + salt))
	hash := fmt.Sprintf("%x", h.Sum(nil))
	return hash
}

func ExampleMailer() {
	from := "app@ornithopterhosting.com"
	pass := "password1234"
	host := "mail.ornithopterhosting.com"
	m := mailer.New(from,
		pass,
		host,
		465,
		"https://app.ornithopter.me/unsubscribe/",
		"If you have problems contact cameron@ornithopterhosting.com",
		UnsubFunc,
	)
	// build methods
	notyou := "If this wasn't you, please email us at support@ornithopterhosting.com"
	register := "Welcome! Click this link to confirm your account:"
	registerbase := "https://app.ornithopter.me/auth/register/"
	m.AddKeyedTemplate("Register", "Registration", register, registerbase, notyou)
	recoveryexplain := "Someone (probably you) requested a password reset.\nTo finish recovering your account, click here:"
	recoverybase := "https://app.ornithopter.me/auth/recover/"
	m.AddKeyedTemplate("Recovery", "Password Recovery", recoveryexplain, recoverybase, notyou)
	passwordchanged := "Someone (probably you) changed your password.\n" +
		"If this wasn't you, please email us at support@ornithopterhosting.com\n"

	m.AddTemplate("Changed", "Password Changed", passwordchanged)
	// send with methods
	m.SendKeyed["Register"]("user@foobar.com", "1234")
	m.SendKeyed["Recovery"]("user@foobar.com", "1234")
	m.Send["Changed"]("user@foobar.com")
}