package eventsourcing

import (
	"context"

	"github.com/caos/zitadel/internal/errors"
	es_models "github.com/caos/zitadel/internal/eventstore/models"
	es_sdk "github.com/caos/zitadel/internal/eventstore/sdk"
	"github.com/caos/zitadel/internal/user/repository/eventsourcing/model"
)

func UserByIDQuery(id string, latestSequence uint64) (*es_models.SearchQuery, error) {
	if id == "" {
		return nil, errors.ThrowPreconditionFailed(nil, "EVENT-d8isw", "id should be filled")
	}
	return UserQuery(latestSequence).
		AggregateIDFilter(id), nil
}

func UserQuery(latestSequence uint64) *es_models.SearchQuery {
	return es_models.NewSearchQuery().
		AggregateTypeFilter(model.UserAggregate).
		LatestSequenceFilter(latestSequence)
}

func UserAggregate(ctx context.Context, aggCreator *es_models.AggregateCreator, user *model.User) (*es_models.Aggregate, error) {
	if user == nil {
		return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dis83", "existing user should not be nil")
	}
	return aggCreator.NewAggregate(ctx, user.AggregateID, model.UserAggregate, model.UserVersion, user.Sequence)
}

func UserAggregateOverwriteContext(ctx context.Context, aggCreator *es_models.AggregateCreator, user *model.User, resourceOwnerID string, userID string) (*es_models.Aggregate, error) {
	if user == nil {
		return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dis83", "existing user should not be nil")
	}

	return aggCreator.NewAggregate(ctx, user.AggregateID, model.UserAggregate, model.UserVersion, user.Sequence, es_models.OverwriteResourceOwner(resourceOwnerID), es_models.OverwriteEditorUser(userID))
}

func UserCreateAggregate(ctx context.Context, aggCreator *es_models.AggregateCreator, user *model.User, initCode *model.InitUserCode, phoneCode *model.PhoneCode, resourceOwner string) (agg *es_models.Aggregate, err error) {
	if user == nil {
		return nil, errors.ThrowPreconditionFailed(nil, "EVENT-duxk2", "user should not be nil")
	}

	if resourceOwner != "" {
		agg, err = UserAggregateOverwriteContext(ctx, aggCreator, user, user.AggregateID, resourceOwner)
	} else {
		agg, err = UserAggregate(ctx, aggCreator, user)
	}
	if err != nil {
		return nil, err
	}

	agg, err = agg.AppendEvent(model.UserAdded, user)
	if err != nil {
		return nil, err
	}
	if user.Email != nil && user.EmailAddress != "" && user.IsEmailVerified {
		agg, err = agg.AppendEvent(model.UserEmailVerified, nil)
		if err != nil {
			return nil, err
		}
	}
	if user.Phone != nil && user.PhoneNumber != "" && user.IsPhoneVerified {
		agg, err = agg.AppendEvent(model.UserPhoneVerified, nil)
		if err != nil {
			return nil, err
		}
	}
	if initCode != nil {
		agg, err = agg.AppendEvent(model.InitializedUserCodeAdded, initCode)
		if err != nil {
			return nil, err
		}
	}
	if phoneCode != nil {
		agg, err = agg.AppendEvent(model.UserPhoneCodeAdded, phoneCode)
		if err != nil {
			return nil, err
		}
	}
	return agg, err
}

func UserRegisterAggregate(ctx context.Context, aggCreator *es_models.AggregateCreator, user *model.User, resourceOwner string, emailCode *model.EmailCode) (*es_models.Aggregate, error) {
	if user == nil || resourceOwner == "" || emailCode == nil {
		return nil, errors.ThrowPreconditionFailed(nil, "EVENT-duxk2", "user, resourceowner, emailcode should not be nothing")
	}

	agg, err := UserAggregateOverwriteContext(ctx, aggCreator, user, resourceOwner, user.AggregateID)
	if err != nil {
		return nil, err
	}

	agg, err = agg.AppendEvent(model.UserRegistered, user)
	if err != nil {
		return nil, err
	}
	return agg.AppendEvent(model.UserEmailCodeAdded, emailCode)
}

func UserDeactivateAggregate(aggCreator *es_models.AggregateCreator, user *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return userStateAggregate(aggCreator, user, model.UserDeactivated)
}

func UserReactivateAggregate(aggCreator *es_models.AggregateCreator, user *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return userStateAggregate(aggCreator, user, model.UserReactivated)
}

func UserLockAggregate(aggCreator *es_models.AggregateCreator, user *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return userStateAggregate(aggCreator, user, model.UserLocked)
}

func UserUnlockAggregate(aggCreator *es_models.AggregateCreator, user *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return userStateAggregate(aggCreator, user, model.UserUnlocked)
}

func userStateAggregate(aggCreator *es_models.AggregateCreator, user *model.User, state es_models.EventType) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, user)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(state, nil)
	}
}

func UserInitCodeAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, code *model.InitUserCode) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if code == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-d8i23", "code should not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.InitializedUserCodeAdded, code)
	}
}

func UserInitCodeSentAggregate(aggCreator *es_models.AggregateCreator, existing *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.InitializedUserCodeSent, nil)
	}
}

func SkipMfaAggregate(aggCreator *es_models.AggregateCreator, existing *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.MfaInitSkipped, nil)
	}
}

func PasswordChangeAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, password *model.Password) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if password == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-d9832", "password should not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserPasswordChanged, password)
	}
}

func PasswordCheckSucceededAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, check *model.AuthRequest) es_sdk.AggregateFunc {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserPasswordCheckSucceeded, check)
	}
}
func PasswordCheckFailedAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, check *model.AuthRequest) es_sdk.AggregateFunc {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserPasswordCheckFailed, check)
	}
}

func RequestSetPassword(aggCreator *es_models.AggregateCreator, existing *model.User, request *model.PasswordCode) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if request == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-d8ei2", "password set request should not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserPasswordCodeAdded, request)
	}
}

func PasswordCodeSentAggregate(aggCreator *es_models.AggregateCreator, existing *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserPasswordCodeSent, nil)
	}
}

func ProfileChangeAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, profile *model.Profile) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if profile == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dhr74", "profile should not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		changes := existing.Profile.Changes(profile)
		if len(changes) == 0 {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-0spow", "no changes found")
		}
		return agg.AppendEvent(model.UserProfileChanged, changes)
	}
}

func EmailChangeAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, email *model.Email, code *model.EmailCode) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if email == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dki8s", "email should not be nil")
		}
		if (!email.IsEmailVerified && code == nil) || (email.IsEmailVerified && code != nil) {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-id934", "email has to be verified or code must be sent")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		changes := existing.Email.Changes(email)
		if len(changes) == 0 {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-s90pw", "no changes found")
		}
		agg, err = agg.AppendEvent(model.UserEmailChanged, changes)
		if err != nil {
			return nil, err
		}
		if existing.Email == nil {
			existing.Email = new(model.Email)
		}
		if email.IsEmailVerified {
			return agg.AppendEvent(model.UserEmailVerified, code)
		}
		if code != nil {
			return agg.AppendEvent(model.UserEmailCodeAdded, code)
		}
		return agg, nil
	}
}
func EmailVerifiedAggregate(aggCreator *es_models.AggregateCreator, existing *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserEmailVerified, nil)
	}
}

func EmailVerificationCodeAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, code *model.EmailCode) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if code == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dki8s", "code should not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserEmailCodeAdded, code)
	}
}

func EmailCodeSentAggregate(aggCreator *es_models.AggregateCreator, existing *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserEmailCodeSent, nil)
	}
}

func PhoneChangeAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, phone *model.Phone, code *model.PhoneCode) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if phone == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dkso3", "phone should not be nil")
		}
		if (!phone.IsPhoneVerified && code == nil) || (phone.IsPhoneVerified && code != nil) {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dksi8", "phone has to be verified or code must be sent")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		if existing.Phone == nil {
			existing.Phone = new(model.Phone)
		}
		changes := existing.Phone.Changes(phone)
		if len(changes) == 0 {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-sp0oc", "no changes found")
		}
		agg, err = agg.AppendEvent(model.UserPhoneChanged, changes)
		if err != nil {
			return nil, err
		}
		if phone.IsPhoneVerified {
			return agg.AppendEvent(model.UserPhoneVerified, code)
		}
		if code != nil {
			return agg.AppendEvent(model.UserPhoneCodeAdded, code)
		}
		return agg, nil
	}
}
func PhoneVerifiedAggregate(aggCreator *es_models.AggregateCreator, existing *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserPhoneVerified, nil)
	}
}

func PhoneVerificationCodeAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, code *model.PhoneCode) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if code == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dsue2", "code should not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserPhoneCodeAdded, code)
	}
}

func PhoneCodeSentAggregate(aggCreator *es_models.AggregateCreator, existing *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.UserPhoneCodeSent, nil)
	}
}

func AddressChangeAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, address *model.Address) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if address == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dkx9s", "address should not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		if existing.Address == nil {
			existing.Address = new(model.Address)
		}
		changes := existing.Address.Changes(address)
		if len(changes) == 0 {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-2tszw", "no changes found")
		}
		return agg.AppendEvent(model.UserAddressChanged, changes)
	}
}

func MfaOTPAddAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, otp *model.OTP) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if otp == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-dkx9s", "otp should not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.MfaOtpAdded, otp)
	}
}

func MfaOTPVerifyAggregate(aggCreator *es_models.AggregateCreator, existing *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.MfaOtpVerified, nil)
	}
}

func MfaOTPCheckSucceededAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, authReq *model.AuthRequest) es_sdk.AggregateFunc {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if authReq == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-sd5DA", "authReq must not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.MfaOtpCheckSucceeded, authReq)
	}
}

func MfaOTPCheckFailedAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, authReq *model.AuthRequest) es_sdk.AggregateFunc {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		if authReq == nil {
			return nil, errors.ThrowPreconditionFailed(nil, "EVENT-64sd6", "authReq must not be nil")
		}
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.MfaOtpCheckFailed, authReq)
	}
}

func MfaOTPRemoveAggregate(aggCreator *es_models.AggregateCreator, existing *model.User) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.MfaOtpRemoved, nil)
	}
}

func SignOutAggregate(aggCreator *es_models.AggregateCreator, existing *model.User, agentID string) func(ctx context.Context) (*es_models.Aggregate, error) {
	return func(ctx context.Context) (*es_models.Aggregate, error) {
		agg, err := UserAggregate(ctx, aggCreator, existing)
		if err != nil {
			return nil, err
		}
		return agg.AppendEvent(model.SignedOut, map[string]interface{}{"agentID": agentID})
	}
}