package model

import (
	"encoding/json"
	"github.com/caos/logging"
	caos_errs "github.com/caos/zitadel/internal/errors"
	es_models "github.com/caos/zitadel/internal/eventstore/v1/models"
	"github.com/caos/zitadel/internal/user/model"
)

type ExternalIDP struct {
	es_models.ObjectRoot

	IDPConfigID string `json:"idpConfigId,omitempty"`
	UserID      string `json:"userId,omitempty"`
	DisplayName string `json:"displayName,omitempty"`
}

func GetExternalIDP(idps []*ExternalIDP, id string) (int, *ExternalIDP) {
	for i, idp := range idps {
		if idp.UserID == id {
			return i, idp
		}
	}
	return -1, nil
}

func ExternalIDPsToModel(externalIDPs []*ExternalIDP) []*model.ExternalIDP {
	convertedIDPs := make([]*model.ExternalIDP, len(externalIDPs))
	for i, m := range externalIDPs {
		convertedIDPs[i] = ExternalIDPToModel(m)
	}
	return convertedIDPs
}

func ExternalIDPsFromModel(externalIDPs []*model.ExternalIDP) []*ExternalIDP {
	convertedIDPs := make([]*ExternalIDP, len(externalIDPs))
	for i, m := range externalIDPs {
		convertedIDPs[i] = ExternalIDPFromModel(m)
	}
	return convertedIDPs
}

func ExternalIDPFromModel(idp *model.ExternalIDP) *ExternalIDP {
	if idp == nil {
		return nil
	}
	return &ExternalIDP{
		ObjectRoot:  idp.ObjectRoot,
		IDPConfigID: idp.IDPConfigID,
		UserID:      idp.UserID,
		DisplayName: idp.DisplayName,
	}
}

func ExternalIDPToModel(idp *ExternalIDP) *model.ExternalIDP {
	return &model.ExternalIDP{
		ObjectRoot:  idp.ObjectRoot,
		IDPConfigID: idp.IDPConfigID,
		UserID:      idp.UserID,
	}
}

func (u *Human) appendExternalIDPAddedEvent(event *es_models.Event) error {
	idp := new(ExternalIDP)
	err := idp.setData(event)
	if err != nil {
		return err
	}
	idp.ObjectRoot.CreationDate = event.CreationDate
	u.ExternalIDPs = append(u.ExternalIDPs, idp)
	return nil
}

func (u *Human) appendExternalIDPRemovedEvent(event *es_models.Event) error {
	idp := new(ExternalIDP)
	err := idp.setData(event)
	if err != nil {
		return err
	}
	if i, externalIdp := GetExternalIDP(u.ExternalIDPs, idp.UserID); externalIdp != nil {
		u.ExternalIDPs[i] = u.ExternalIDPs[len(u.ExternalIDPs)-1]
		u.ExternalIDPs[len(u.ExternalIDPs)-1] = nil
		u.ExternalIDPs = u.ExternalIDPs[:len(u.ExternalIDPs)-1]
	}
	return nil
}

func (pw *ExternalIDP) setData(event *es_models.Event) error {
	pw.ObjectRoot.AppendEvent(event)
	if err := json.Unmarshal(event.Data, pw); err != nil {
		logging.Log("EVEN-Msi9d").WithError(err).Error("could not unmarshal event data")
		return caos_errs.ThrowInternal(err, "MODEL-A9osf", "could not unmarshal event")
	}
	return nil
}