package command

import (
	"context"

	caos_errs "github.com/caos/zitadel/internal/errors"
	"github.com/caos/zitadel/internal/v2/domain"
	"github.com/caos/zitadel/internal/v2/repository/org"
)

func (r *CommandSide) AddLoginPolicy(ctx context.Context, policy *domain.LoginPolicy) (*domain.LoginPolicy, error) {
	addedPolicy := NewOrgLoginPolicyWriteModel(policy.AggregateID)
	err := r.eventstore.FilterToQueryReducer(ctx, addedPolicy)
	if err != nil {
		return nil, err
	}
	if addedPolicy.State == domain.PolicyStateActive {
		return nil, caos_errs.ThrowAlreadyExists(nil, "Org-Dgfb2", "Errors.Org.LoginPolicy.AlreadyExists")
	}

	orgAgg := OrgAggregateFromWriteModel(&addedPolicy.WriteModel)
	orgAgg.PushEvents(org.NewLoginPolicyAddedEvent(ctx, policy.AllowUsernamePassword, policy.AllowRegister, policy.AllowExternalIDP, policy.ForceMFA, policy.PasswordlessType))

	err = r.eventstore.PushAggregate(ctx, addedPolicy, orgAgg)
	if err != nil {
		return nil, err
	}

	return writeModelToLoginPolicy(&addedPolicy.LoginPolicyWriteModel), nil
}

func (r *CommandSide) ChangeLoginPolicy(ctx context.Context, policy *domain.LoginPolicy) (*domain.LoginPolicy, error) {
	existingPolicy := NewOrgLoginPolicyWriteModel(policy.AggregateID)
	err := r.eventstore.FilterToQueryReducer(ctx, existingPolicy)
	if err != nil {
		return nil, err
	}
	if existingPolicy.State == domain.PolicyStateUnspecified || existingPolicy.State == domain.PolicyStateRemoved {
		return nil, caos_errs.ThrowNotFound(nil, "Org-M0sif", "Errors.Org.LoginPolicy.NotFound")
	}
	changedEvent, hasChanged := existingPolicy.NewChangedEvent(ctx, policy.AllowUsernamePassword, policy.AllowRegister, policy.AllowExternalIDP, policy.ForceMFA, domain.PasswordlessType(policy.PasswordlessType))
	if !hasChanged {
		return nil, caos_errs.ThrowPreconditionFailed(nil, "Org-5M9vdd", "Errors.Org.LoginPolicy.NotChanged")
	}

	orgAgg := OrgAggregateFromWriteModel(&existingPolicy.LoginPolicyWriteModel.WriteModel)
	orgAgg.PushEvents(changedEvent)

	err = r.eventstore.PushAggregate(ctx, existingPolicy, orgAgg)
	if err != nil {
		return nil, err
	}

	return writeModelToLoginPolicy(&existingPolicy.LoginPolicyWriteModel), nil
}

func (r *CommandSide) RemoveLoginPolicy(ctx context.Context, orgID string) error {
	existingPolicy := NewOrgLoginPolicyWriteModel(orgID)
	err := r.eventstore.FilterToQueryReducer(ctx, existingPolicy)
	if err != nil {
		return err
	}
	if existingPolicy.State == domain.PolicyStateUnspecified || existingPolicy.State == domain.PolicyStateRemoved {
		return caos_errs.ThrowNotFound(nil, "Org-GHB37", "Errors.Org.LoginPolicy.NotFound")
	}
	orgAgg := OrgAggregateFromWriteModel(&existingPolicy.LoginPolicyWriteModel.WriteModel)
	orgAgg.PushEvents(org.NewLoginPolicyRemovedEvent(ctx))

	return r.eventstore.PushAggregate(ctx, existingPolicy, orgAgg)
}

func (r *CommandSide) AddIDPProviderToLoginPolicy(ctx context.Context, idpProvider *domain.IDPProvider) (*domain.IDPProvider, error) {
	idpModel := NewOrgIdentityProviderWriteModel(idpProvider.AggregateID, idpProvider.IDPConfigID)
	err := r.eventstore.FilterToQueryReducer(ctx, idpModel)
	if err != nil {
		return nil, err
	}
	if idpModel.State == domain.IdentityProviderStateActive {
		return nil, caos_errs.ThrowAlreadyExists(nil, "Org-2B0ps", "Errors.Org.LoginPolicy.IDP.AlreadyExists")
	}

	orgAgg := OrgAggregateFromWriteModel(&idpModel.WriteModel)
	orgAgg.PushEvents(org.NewIdentityProviderAddedEvent(ctx, idpProvider.IDPConfigID, idpProvider.Type))

	if err = r.eventstore.PushAggregate(ctx, idpModel, orgAgg); err != nil {
		return nil, err
	}

	return writeModelToIDPProvider(&idpModel.IdentityProviderWriteModel), nil
}

func (r *CommandSide) RemoveIDPProviderFromLoginPolicy(ctx context.Context, idpProvider *domain.IDPProvider) error {
	idpModel := NewOrgIdentityProviderWriteModel(idpProvider.AggregateID, idpProvider.IDPConfigID)
	err := r.eventstore.FilterToQueryReducer(ctx, idpModel)
	if err != nil {
		return err
	}
	if idpModel.State == domain.IdentityProviderStateUnspecified || idpModel.State == domain.IdentityProviderStateRemoved {
		return caos_errs.ThrowNotFound(nil, "Org-39fjs", "Errors.Org.LoginPolicy.IDP.NotExisting")
	}
	orgAgg := OrgAggregateFromWriteModel(&idpModel.IdentityProviderWriteModel.WriteModel)
	orgAgg.PushEvents(org.NewIdentityProviderRemovedEvent(ctx, idpProvider.IDPConfigID))

	return r.eventstore.PushAggregate(ctx, idpModel, orgAgg)
}

func (r *CommandSide) AddSecondFactorToLoginPolicy(ctx context.Context, secondFactor domain.SecondFactorType, orgID string) (domain.SecondFactorType, error) {
	secondFactorModel := NewOrgSecondFactorWriteModel(orgID)
	err := r.eventstore.FilterToQueryReducer(ctx, secondFactorModel)
	if err != nil {
		return domain.SecondFactorTypeUnspecified, err
	}

	if secondFactorModel.State == domain.FactorStateActive {
		return domain.SecondFactorTypeUnspecified, caos_errs.ThrowAlreadyExists(nil, "Org-2B0ps", "Errors.Org.LoginPolicy.MFA.AlreadyExists")
	}

	orgAgg := OrgAggregateFromWriteModel(&secondFactorModel.SecondFactorWriteModel.WriteModel)
	orgAgg.PushEvents(org.NewLoginPolicySecondFactorAddedEvent(ctx, secondFactor))

	if err = r.eventstore.PushAggregate(ctx, secondFactorModel, orgAgg); err != nil {
		return domain.SecondFactorTypeUnspecified, err
	}

	return secondFactorModel.MFAType, nil
}

func (r *CommandSide) RemoveSecondFactorFromLoginPolicy(ctx context.Context, secondFactor domain.SecondFactorType, orgID string) error {
	secondFactorModel := NewOrgSecondFactorWriteModel(orgID)
	err := r.eventstore.FilterToQueryReducer(ctx, secondFactorModel)
	if err != nil {
		return err
	}
	if secondFactorModel.State == domain.FactorStateUnspecified || secondFactorModel.State == domain.FactorStateRemoved {
		return caos_errs.ThrowNotFound(nil, "Org-3M9od", "Errors.Org.LoginPolicy.MFA.NotExisting")
	}
	orgAgg := OrgAggregateFromWriteModel(&secondFactorModel.SecondFactorWriteModel.WriteModel)
	orgAgg.PushEvents(org.NewLoginPolicySecondFactorRemovedEvent(ctx, domain.SecondFactorType(secondFactor)))

	return r.eventstore.PushAggregate(ctx, secondFactorModel, orgAgg)
}

func (r *CommandSide) AddMultiFactorToLoginPolicy(ctx context.Context, multiFactor domain.MultiFactorType, orgID string) (domain.MultiFactorType, error) {
	multiFactorModel := NewOrgMultiFactorWriteModel(orgID)
	err := r.eventstore.FilterToQueryReducer(ctx, multiFactorModel)
	if err != nil {
		return domain.MultiFactorTypeUnspecified, err
	}
	if multiFactorModel.State == domain.FactorStateActive {
		return domain.MultiFactorTypeUnspecified, caos_errs.ThrowAlreadyExists(nil, "Org-3M9od", "Errors.Org.LoginPolicy.MFA.AlreadyExists")
	}

	orgAgg := OrgAggregateFromWriteModel(&multiFactorModel.WriteModel)
	orgAgg.PushEvents(org.NewLoginPolicyMultiFactorAddedEvent(ctx, multiFactor))

	if err = r.eventstore.PushAggregate(ctx, multiFactorModel, orgAgg); err != nil {
		return domain.MultiFactorTypeUnspecified, err
	}

	return multiFactorModel.MFAType, nil
}

func (r *CommandSide) RemoveMultiFactorFromLoginPolicy(ctx context.Context, multiFactor domain.MultiFactorType, orgID string) error {
	multiFactorModel := NewOrgMultiFactorWriteModel(orgID)
	err := r.eventstore.FilterToQueryReducer(ctx, multiFactorModel)
	if err != nil {
		return err
	}
	if multiFactorModel.State == domain.FactorStateUnspecified || multiFactorModel.State == domain.FactorStateRemoved {
		return caos_errs.ThrowNotFound(nil, "Org-3M9df", "Errors.Org.LoginPolicy.MFA.NotExisting")
	}
	orgAgg := OrgAggregateFromWriteModel(&multiFactorModel.MultiFactoryWriteModel.WriteModel)
	orgAgg.PushEvents(org.NewLoginPolicyMultiFactorRemovedEvent(ctx, domain.MultiFactorType(multiFactor)))

	return r.eventstore.PushAggregate(ctx, multiFactorModel, orgAgg)
}