package model

import (
	"encoding/json"
	"time"

	"github.com/caos/logging"

	caos_errs "github.com/caos/zitadel/internal/errors"
	"github.com/caos/zitadel/internal/eventstore/models"
	"github.com/caos/zitadel/internal/key/model"
	proj_model "github.com/caos/zitadel/internal/project/repository/eventsourcing/model"
	proj_view_model "github.com/caos/zitadel/internal/project/repository/view/model"
	user_model "github.com/caos/zitadel/internal/user/repository/eventsourcing/model"
)

const (
	AuthNKeyKeyID      = "key_id"
	AuthNKeyObjectID   = "object_id"
	AuthNKeyObjectType = "object_type"
)

type AuthNKeyView struct {
	ID             string    `json:"keyId" gorm:"column:key_id;primary_key"`
	ObjectID       string    `json:"-" gorm:"column:object_id;primary_key"`
	ObjectType     int32     `json:"-" gorm:"column:object_type;primary_key"`
	AuthIdentifier string    `json:"-" gorm:"column:auth_identifier;primary_key"`
	Type           int32     `json:"type" gorm:"column:key_type"`
	ExpirationDate time.Time `json:"expirationDate" gorm:"column:expiration_date"`
	Sequence       uint64    `json:"-" gorm:"column:sequence"`
	CreationDate   time.Time `json:"-" gorm:"column:creation_date"`
	PublicKey      []byte    `json:"publicKey" gorm:"column:public_key"`
	State          int32     `json:"-" gorm:"column:state"`
}

func AuthNKeyViewFromModel(key *model.AuthNKeyView) *AuthNKeyView {
	return &AuthNKeyView{
		ID:             key.ID,
		ObjectID:       key.ObjectID,
		ObjectType:     int32(key.ObjectType),
		Type:           int32(key.Type),
		ExpirationDate: key.ExpirationDate,
		Sequence:       key.Sequence,
		CreationDate:   key.CreationDate,
		State:          int32(key.State),
	}
}

func AuthNKeyToModel(key *AuthNKeyView) *model.AuthNKeyView {
	return &model.AuthNKeyView{
		ID:             key.ID,
		ObjectID:       key.ObjectID,
		ObjectType:     model.ObjectType(key.ObjectType),
		AuthIdentifier: key.AuthIdentifier,
		Type:           model.AuthNKeyType(key.Type),
		ExpirationDate: key.ExpirationDate,
		Sequence:       key.Sequence,
		CreationDate:   key.CreationDate,
		PublicKey:      key.PublicKey,
		State:          model.AuthNKeyState(key.State),
	}
}

func AuthNKeysToModel(keys []*AuthNKeyView) []*model.AuthNKeyView {
	result := make([]*model.AuthNKeyView, len(keys))
	for i, key := range keys {
		result[i] = AuthNKeyToModel(key)
	}
	return result
}

func (k *AuthNKeyView) AppendEventIfMyClientKey(event *models.Event) (err error) {
	switch event.Type {
	case proj_model.ApplicationDeactivated,
		proj_model.ApplicationReactivated,
		proj_model.ApplicationRemoved:
		a := new(proj_view_model.ApplicationView)
		if err := a.AppendEvent(event); err != nil {
			return err
		}
		if a.ID == k.ObjectID {
			return k.AppendEvent(event)
		}
	case proj_model.ProjectDeactivated,
		proj_model.ProjectReactivated,
		proj_model.ProjectRemoved:
		return k.AppendEvent(event)
	case user_model.UserLocked,
		user_model.UserDeactivated,
		user_model.UserUnlocked,
		user_model.UserReactivated,
		user_model.UserRemoved:
		return k.AppendEvent(event)
	case proj_model.ClientKeyRemoved,
		user_model.MachineKeyRemoved:
		view := new(AuthNKeyView)
		if view.ID == k.ID {
			return k.AppendEvent(event)
		}
	default:
		return nil
	}
	return nil
}

func (k *AuthNKeyView) AppendEvent(event *models.Event) (err error) {
	k.Sequence = event.Sequence
	switch event.Type {
	case user_model.MachineKeyAdded:
		k.setRootData(event)
		k.CreationDate = event.CreationDate
		err = k.SetUserData(event)
	case proj_model.ClientKeyAdded:
		k.setRootData(event)
		k.CreationDate = event.CreationDate
		err = k.SetClientData(event)
	case proj_model.ClientKeyRemoved,
		proj_model.ApplicationRemoved,
		proj_model.ProjectRemoved,
		user_model.MachineKeyRemoved,
		user_model.UserRemoved:
		k.State = int32(model.AuthNKeyStateRemoved)
	case proj_model.ProjectDeactivated,
		proj_model.ApplicationDeactivated,
		user_model.UserDeactivated,
		user_model.UserLocked:
		k.State = int32(model.AuthNKeyStateInactive)
	case proj_model.ProjectReactivated,
		proj_model.ApplicationReactivated,
		user_model.UserReactivated,
		user_model.UserUnlocked:
		if k.State != int32(model.AuthNKeyStateRemoved) {
			k.State = int32(model.AuthNKeyStateActive)
		}
	}
	return err
}

func (k *AuthNKeyView) setRootData(event *models.Event) {
	switch event.AggregateType {
	case user_model.UserAggregate:
		k.ObjectType = int32(model.AuthNKeyObjectTypeUser)
		k.ObjectID = event.AggregateID
		k.AuthIdentifier = event.AggregateID
	case proj_model.ProjectAggregate:
		k.ObjectType = int32(model.AuthNKeyObjectTypeApplication)
	}
}

func (k *AuthNKeyView) SetUserData(event *models.Event) error {
	if err := json.Unmarshal(event.Data, k); err != nil {
		logging.Log("EVEN-Sj90d").WithError(err).Error("could not unmarshal event data")
		return caos_errs.ThrowInternal(err, "MODEL-lub6s", "Could not unmarshal data")
	}
	return nil
}

func (k *AuthNKeyView) SetClientData(event *models.Event) error {
	key := new(proj_model.ClientKey)
	if err := json.Unmarshal(event.Data, key); err != nil {
		logging.Log("EVEN-Dgsgg").WithError(err).Error("could not unmarshal event data")
		return caos_errs.ThrowInternal(err, "MODEL-ADbfz", "Could not unmarshal data")
	}
	k.ObjectID = key.ApplicationID
	k.AuthIdentifier = key.ClientID
	k.ID = key.KeyID
	k.ExpirationDate = key.ExpirationDate
	k.PublicKey = key.PublicKey
	k.Type = key.Type
	return nil
}