package mail

import (
	"strings"

	mailModel "dove/models/mail"
	domainRepo "dove/repositories/domain"
	mailRepo "dove/repositories/mail"
	"dove/utils/shortcuts"
	"dove/utils/validate"
)

type CreateAliasRequest struct {
	LocalPart string `form:"local_part"`
	DomainID  uint   `form:"domain_id"`
	MailboxID uint
}

func CreateAlias(request CreateAliasRequest) *shortcuts.Error {
	localPart := strings.TrimSpace(request.LocalPart)

	switch {
	case localPart == "":
		return shortcuts.ServiceError(shortcuts.BadRequest, LocalPartRequired)
	case !validate.EmailLocalPart(localPart):
		return shortcuts.ServiceError(shortcuts.BadRequest, LocalPartInvalid)
	case request.DomainID == 0:
		return shortcuts.ServiceError(shortcuts.BadRequest, DomainRequired)
	case request.MailboxID == 0:
		return shortcuts.ServiceError(shortcuts.BadRequest, MailboxNotFound)
	}

	mailbox := mailRepo.FindMailboxByID(request.MailboxID)
	if mailbox == nil {
		return shortcuts.ServiceError(shortcuts.NotFound, MailboxNotFound)
	}

	foundDomain := domainRepo.FindDomainByID(request.DomainID)
	if foundDomain == nil {
		return shortcuts.ServiceError(shortcuts.Unprocessable, DomainNotFound)
	}

	sourceAddress := localPart + "@" + foundDomain.Name + "." + foundDomain.TLD.Name

	if mailRepo.FindMailboxByAddress(sourceAddress) != nil {
		return shortcuts.ServiceError(shortcuts.Unprocessable, AliasAlreadyExists)
	}

	if mailRepo.FindAliasByAddress(sourceAddress) != nil {
		return shortcuts.ServiceError(shortcuts.Unprocessable, AliasAlreadyExists)
	}

	alias := &mailModel.Alias{
		SourceAddress: sourceAddress,
		MailboxID:     request.MailboxID,
	}

	if createError := mailRepo.CreateAlias(alias); createError != nil {
		return shortcuts.ServiceError(shortcuts.Internal, AliasCreationFailed)
	}

	return nil
}

func DeleteAlias(aliasID uint) *shortcuts.Error {
	alias := mailRepo.FindAliasByID(aliasID)
	if alias == nil {
		return shortcuts.ServiceError(shortcuts.NotFound, AliasNotFound)
	}

	if deleteError := mailRepo.DeleteAlias(alias); deleteError != nil {
		return shortcuts.ServiceError(shortcuts.Internal, AliasDeletionFailed)
	}

	return nil
}