package useCases

import (
	"RenewCMS/internal/domain/hash"
	"RenewCMS/internal/domain/invite"
	"RenewCMS/internal/domain/mail"
	"RenewCMS/internal/domain/user"
	"fmt"
	"strings"

	"github.com/google/uuid"
)

const inviteTemplateName = "invitation"

type MailInviteData struct {
	Host             string
	VerificationCode string
	Email            string
	InvitedBy        string
}

func (d MailInviteData) Subject() string {
	inviter := strings.NewReplacer("\r", " ", "\n", " ").Replace(d.InvitedBy)
	return inviter + " invited you to RenewCMS"
}

type inviteMailer struct {
	mailRepository mail.Repository
	publicURL      string
}

func (m inviteMailer) send(email string, rawCode string, inviter user.User) error {
	if err := m.mailRepository.Send(email, inviteTemplateName, MailInviteData{
		Host:             m.publicURL,
		VerificationCode: rawCode,
		Email:            email,
		InvitedBy:        inviterName(inviter),
	}); err != nil {
		return fmt.Errorf("%w: %w", invite.ErrInviteEmailNotSent, err)
	}
	return nil
}

func newInviteCode(hasher hash.Hasher) (string, string, error) {
	rawCode := uuid.NewString()
	hashedCode, err := hasher.Hash(rawCode)
	if err != nil {
		return "", "", err
	}
	return rawCode, hashedCode, nil
}

func inviterName(inviter user.User) string {
	if inviter.DisplayName != "" {
		return inviter.DisplayName
	}
	return inviter.Username
}