package model

import (
	"github.com/caos/zitadel/internal/domain"
	"time"

	"golang.org/x/text/language"

	req_model "github.com/caos/zitadel/internal/auth_request/model"
	"github.com/caos/zitadel/internal/errors"
	"github.com/caos/zitadel/internal/eventstore/v1/models"
	iam_model "github.com/caos/zitadel/internal/iam/model"
)

type UserView struct {
	ID                 string
	UserName           string
	CreationDate       time.Time
	ChangeDate         time.Time
	State              UserState
	Sequence           uint64
	ResourceOwner      string
	LastLogin          time.Time
	PreferredLoginName string
	LoginNames         []string
	*MachineView
	*HumanView
}

type HumanView struct {
	PasswordSet            bool
	PasswordChangeRequired bool
	UsernameChangeRequired bool
	PasswordChanged        time.Time
	FirstName              string
	LastName               string
	NickName               string
	DisplayName            string
	PreferredLanguage      string
	Gender                 Gender
	Email                  string
	IsEmailVerified        bool
	Phone                  string
	IsPhoneVerified        bool
	Country                string
	Locality               string
	PostalCode             string
	Region                 string
	StreetAddress          string
	OTPState               MFAState
	U2FTokens              []*WebAuthNView
	PasswordlessTokens     []*WebAuthNView
	MFAMaxSetUp            req_model.MFALevel
	MFAInitSkipped         time.Time
	InitRequired           bool
}

type WebAuthNView struct {
	TokenID string
	Name    string
	State   MFAState
}

type MachineView struct {
	LastKeyAdded time.Time
	Name         string
	Description  string
}

type UserSearchRequest struct {
	Offset        uint64
	Limit         uint64
	SortingColumn UserSearchKey
	Asc           bool
	Queries       []*UserSearchQuery
}

type UserSearchKey int32

const (
	UserSearchKeyUnspecified UserSearchKey = iota
	UserSearchKeyUserID
	UserSearchKeyUserName
	UserSearchKeyFirstName
	UserSearchKeyLastName
	UserSearchKeyNickName
	UserSearchKeyDisplayName
	UserSearchKeyEmail
	UserSearchKeyState
	UserSearchKeyResourceOwner
	UserSearchKeyLoginNames
	UserSearchKeyType
	UserSearchKeyPreferredLoginName
)

type UserSearchQuery struct {
	Key    UserSearchKey
	Method domain.SearchMethod
	Value  interface{}
}

type UserSearchResponse struct {
	Offset      uint64
	Limit       uint64
	TotalResult uint64
	Result      []*UserView
	Sequence    uint64
	Timestamp   time.Time
}

type UserState int32

const (
	UserStateUnspecified UserState = iota
	UserStateActive
	UserStateInactive
	UserStateDeleted
	UserStateLocked
	UserStateSuspend
	UserStateInitial
)

type Gender int32

const (
	GenderUnspecified Gender = iota
	GenderFemale
	GenderMale
	GenderDiverse
)

func (r *UserSearchRequest) EnsureLimit(limit uint64) error {
	if r.Limit > limit {
		return errors.ThrowInvalidArgument(nil, "SEARCH-zz62F", "Errors.Limit.ExceedsDefault")
	}
	if r.Limit == 0 {
		r.Limit = limit
	}
	return nil
}

func (r *UserSearchRequest) AppendMyOrgQuery(orgID string) {
	r.Queries = append(r.Queries, &UserSearchQuery{Key: UserSearchKeyResourceOwner, Method: domain.SearchMethodEquals, Value: orgID})
}

func (u *UserView) MFATypesSetupPossible(level domain.MFALevel, policy *domain.LoginPolicy) []domain.MFAType {
	types := make([]domain.MFAType, 0)
	switch level {
	default:
		fallthrough
	case domain.MFALevelSecondFactor:
		if policy.HasSecondFactors() {
			for _, mfaType := range policy.SecondFactors {
				switch mfaType {
				case domain.SecondFactorTypeOTP:
					if u.OTPState != MFAStateReady {
						types = append(types, domain.MFATypeOTP)
					}
				case domain.SecondFactorTypeU2F:
					types = append(types, domain.MFATypeU2F)
				}
			}
		}
		//PLANNED: add sms
	}
	return types
}

func (u *UserView) MFATypesAllowed(level domain.MFALevel, policy *domain.LoginPolicy) ([]domain.MFAType, bool) {
	types := make([]domain.MFAType, 0)
	required := true
	switch level {
	default:
		required = policy.ForceMFA
		fallthrough
	case domain.MFALevelSecondFactor:
		if policy.HasSecondFactors() {
			for _, mfaType := range policy.SecondFactors {
				switch mfaType {
				case domain.SecondFactorTypeOTP:
					if u.OTPState == MFAStateReady {
						types = append(types, domain.MFATypeOTP)
					}
				case domain.SecondFactorTypeU2F:
					if u.IsU2FReady() {
						types = append(types, domain.MFATypeU2F)
					}
				}
			}
		}
		//PLANNED: add sms
	}
	return types, required
}

func (u *UserView) IsU2FReady() bool {
	for _, token := range u.U2FTokens {
		if token.State == MFAStateReady {
			return true
		}
	}
	return false
}

func (u *UserView) IsPasswordlessReady() bool {
	for _, token := range u.PasswordlessTokens {
		if token.State == MFAStateReady {
			return true
		}
	}
	return false
}

func (u *UserView) HasRequiredOrgMFALevel(policy *iam_model.LoginPolicyView) bool {
	if !policy.ForceMFA {
		return true
	}
	switch u.MFAMaxSetUp {
	case req_model.MFALevelSecondFactor:
		return policy.HasSecondFactors()
	case req_model.MFALevelMultiFactor:
		return policy.HasMultiFactors()
	default:
		return false
	}
}

func (u *UserView) GetProfile() (*Profile, error) {
	if u.HumanView == nil {
		return nil, errors.ThrowPreconditionFailed(nil, "MODEL-WLTce", "Errors.User.NotHuman")
	}
	return &Profile{
		ObjectRoot: models.ObjectRoot{
			AggregateID:   u.ID,
			Sequence:      u.Sequence,
			ResourceOwner: u.ResourceOwner,
			CreationDate:  u.CreationDate,
			ChangeDate:    u.ChangeDate,
		},
		FirstName:          u.FirstName,
		LastName:           u.LastName,
		NickName:           u.NickName,
		DisplayName:        u.DisplayName,
		PreferredLanguage:  language.Make(u.PreferredLanguage),
		Gender:             u.Gender,
		PreferredLoginName: u.PreferredLoginName,
		LoginNames:         u.LoginNames,
	}, nil
}

func (u *UserView) GetPhone() (*Phone, error) {
	if u.HumanView == nil {
		return nil, errors.ThrowPreconditionFailed(nil, "MODEL-him4a", "Errors.User.NotHuman")
	}
	return &Phone{
		ObjectRoot: models.ObjectRoot{
			AggregateID:   u.ID,
			Sequence:      u.Sequence,
			ResourceOwner: u.ResourceOwner,
			CreationDate:  u.CreationDate,
			ChangeDate:    u.ChangeDate,
		},
		PhoneNumber:     u.Phone,
		IsPhoneVerified: u.IsPhoneVerified,
	}, nil
}

func (u *UserView) GetEmail() (*Email, error) {
	if u.HumanView == nil {
		return nil, errors.ThrowPreconditionFailed(nil, "MODEL-PWd6K", "Errors.User.NotHuman")
	}
	return &Email{
		ObjectRoot: models.ObjectRoot{
			AggregateID:   u.ID,
			Sequence:      u.Sequence,
			ResourceOwner: u.ResourceOwner,
			CreationDate:  u.CreationDate,
			ChangeDate:    u.ChangeDate,
		},
		EmailAddress:    u.Email,
		IsEmailVerified: u.IsEmailVerified,
	}, nil
}

func (u *UserView) GetAddress() (*Address, error) {
	if u.HumanView == nil {
		return nil, errors.ThrowPreconditionFailed(nil, "MODEL-DN61m", "Errors.User.NotHuman")
	}
	return &Address{
		ObjectRoot: models.ObjectRoot{
			AggregateID:   u.ID,
			Sequence:      u.Sequence,
			ResourceOwner: u.ResourceOwner,
			CreationDate:  u.CreationDate,
			ChangeDate:    u.ChangeDate,
		},
		Country:       u.Country,
		Locality:      u.Locality,
		PostalCode:    u.PostalCode,
		Region:        u.Region,
		StreetAddress: u.StreetAddress,
	}, nil
}