package command

import (
	"context"

	"github.com/zitadel/zitadel/internal/crypto"
	"github.com/zitadel/zitadel/internal/domain"
	caos_errs "github.com/zitadel/zitadel/internal/errors"
	"github.com/zitadel/zitadel/internal/notification/channels/twilio"
	"github.com/zitadel/zitadel/internal/repository/instance"
)

func (c *Commands) AddSMSConfigTwilio(ctx context.Context, instanceID string, config *twilio.Config) (string, *domain.ObjectDetails, error) {
	id, err := c.idGenerator.Next()
	if err != nil {
		return "", nil, err
	}
	smsConfigWriteModel, err := c.getSMSConfig(ctx, instanceID, id)
	if err != nil {
		return "", nil, err
	}

	var token *crypto.CryptoValue
	if config.Token != "" {
		token, err = crypto.Encrypt([]byte(config.Token), c.smsEncryption)
		if err != nil {
			return "", nil, err
		}
	}

	iamAgg := InstanceAggregateFromWriteModel(&smsConfigWriteModel.WriteModel)
	pushedEvents, err := c.eventstore.Push(ctx, instance.NewSMSConfigTwilioAddedEvent(
		ctx,
		iamAgg,
		id,
		config.SID,
		config.SenderNumber,
		token))
	if err != nil {
		return "", nil, err
	}
	err = AppendAndReduce(smsConfigWriteModel, pushedEvents...)
	if err != nil {
		return "", nil, err
	}
	return id, writeModelToObjectDetails(&smsConfigWriteModel.WriteModel), nil
}

func (c *Commands) ChangeSMSConfigTwilio(ctx context.Context, instanceID, id string, config *twilio.Config) (*domain.ObjectDetails, error) {
	if id == "" {
		return nil, caos_errs.ThrowInvalidArgument(nil, "SMS-e9jwf", "Errors.IDMissing")
	}
	smsConfigWriteModel, err := c.getSMSConfig(ctx, instanceID, id)
	if err != nil {
		return nil, err
	}
	if !smsConfigWriteModel.State.Exists() || smsConfigWriteModel.Twilio == nil {
		return nil, caos_errs.ThrowNotFound(nil, "COMMAND-2m9fw", "Errors.SMSConfig.NotFound")
	}
	iamAgg := InstanceAggregateFromWriteModel(&smsConfigWriteModel.WriteModel)

	changedEvent, hasChanged, err := smsConfigWriteModel.NewChangedEvent(
		ctx,
		iamAgg,
		id,
		config.SID,
		config.SenderNumber)
	if err != nil {
		return nil, err
	}
	if !hasChanged {
		return nil, caos_errs.ThrowPreconditionFailed(nil, "COMMAND-jf9wk", "Errors.NoChangesFound")
	}
	pushedEvents, err := c.eventstore.Push(ctx, changedEvent)
	if err != nil {
		return nil, err
	}
	err = AppendAndReduce(smsConfigWriteModel, pushedEvents...)
	if err != nil {
		return nil, err
	}
	return writeModelToObjectDetails(&smsConfigWriteModel.WriteModel), nil
}

func (c *Commands) ChangeSMSConfigTwilioToken(ctx context.Context, instanceID, id, token string) (*domain.ObjectDetails, error) {
	smsConfigWriteModel, err := c.getSMSConfig(ctx, instanceID, id)
	if err != nil {
		return nil, err
	}
	if !smsConfigWriteModel.State.Exists() || smsConfigWriteModel.Twilio == nil {
		return nil, caos_errs.ThrowNotFound(nil, "COMMAND-fj9wf", "Errors.SMSConfig.NotFound")
	}
	iamAgg := InstanceAggregateFromWriteModel(&smsConfigWriteModel.WriteModel)
	newtoken, err := crypto.Encrypt([]byte(token), c.smsEncryption)
	if err != nil {
		return nil, err
	}
	pushedEvents, err := c.eventstore.Push(ctx, instance.NewSMSConfigTokenChangedEvent(
		ctx,
		iamAgg,
		id,
		newtoken))
	if err != nil {
		return nil, err
	}
	err = AppendAndReduce(smsConfigWriteModel, pushedEvents...)
	if err != nil {
		return nil, err
	}
	return writeModelToObjectDetails(&smsConfigWriteModel.WriteModel), nil
}

func (c *Commands) ActivateSMSConfig(ctx context.Context, instanceID, id string) (*domain.ObjectDetails, error) {
	if id == "" {
		return nil, caos_errs.ThrowInvalidArgument(nil, "SMS-dn93n", "Errors.IDMissing")
	}
	smsConfigWriteModel, err := c.getSMSConfig(ctx, instanceID, id)
	if err != nil {
		return nil, err
	}

	if !smsConfigWriteModel.State.Exists() {
		return nil, caos_errs.ThrowNotFound(nil, "COMMAND-sn9we", "Errors.SMSConfig.NotFound")
	}
	if smsConfigWriteModel.State == domain.SMSConfigStateActive {
		return nil, caos_errs.ThrowNotFound(nil, "COMMAND-sn9we", "Errors.SMSConfig.AlreadyActive")
	}
	iamAgg := InstanceAggregateFromWriteModel(&smsConfigWriteModel.WriteModel)
	pushedEvents, err := c.eventstore.Push(ctx, instance.NewSMSConfigTwilioActivatedEvent(
		ctx,
		iamAgg,
		id))
	if err != nil {
		return nil, err
	}
	err = AppendAndReduce(smsConfigWriteModel, pushedEvents...)
	if err != nil {
		return nil, err
	}
	return writeModelToObjectDetails(&smsConfigWriteModel.WriteModel), nil
}

func (c *Commands) DeactivateSMSConfig(ctx context.Context, instanceID, id string) (*domain.ObjectDetails, error) {
	if id == "" {
		return nil, caos_errs.ThrowInvalidArgument(nil, "SMS-frkwf", "Errors.IDMissing")
	}
	smsConfigWriteModel, err := c.getSMSConfig(ctx, instanceID, id)
	if err != nil {
		return nil, err
	}
	if !smsConfigWriteModel.State.Exists() {
		return nil, caos_errs.ThrowNotFound(nil, "COMMAND-s39Kg", "Errors.SMSConfig.NotFound")
	}
	if smsConfigWriteModel.State == domain.SMSConfigStateInactive {
		return nil, caos_errs.ThrowNotFound(nil, "COMMAND-dm9e3", "Errors.SMSConfig.AlreadyDeactivated")
	}

	iamAgg := InstanceAggregateFromWriteModel(&smsConfigWriteModel.WriteModel)
	pushedEvents, err := c.eventstore.Push(ctx, instance.NewSMSConfigDeactivatedEvent(
		ctx,
		iamAgg,
		id))
	if err != nil {
		return nil, err
	}
	err = AppendAndReduce(smsConfigWriteModel, pushedEvents...)
	if err != nil {
		return nil, err
	}
	return writeModelToObjectDetails(&smsConfigWriteModel.WriteModel), nil
}

func (c *Commands) RemoveSMSConfig(ctx context.Context, instanceID, id string) (*domain.ObjectDetails, error) {
	if id == "" {
		return nil, caos_errs.ThrowInvalidArgument(nil, "SMS-3j9fs", "Errors.IDMissing")
	}
	smsConfigWriteModel, err := c.getSMSConfig(ctx, instanceID, id)
	if err != nil {
		return nil, err
	}
	if !smsConfigWriteModel.State.Exists() {
		return nil, caos_errs.ThrowNotFound(nil, "COMMAND-sn9we", "Errors.SMSConfig.NotFound")
	}

	iamAgg := InstanceAggregateFromWriteModel(&smsConfigWriteModel.WriteModel)
	pushedEvents, err := c.eventstore.Push(ctx, instance.NewSMSConfigRemovedEvent(
		ctx,
		iamAgg,
		id))
	if err != nil {
		return nil, err
	}
	err = AppendAndReduce(smsConfigWriteModel, pushedEvents...)
	if err != nil {
		return nil, err
	}
	return writeModelToObjectDetails(&smsConfigWriteModel.WriteModel), nil
}
func (c *Commands) getSMSConfig(ctx context.Context, instanceID, id string) (_ *IAMSMSConfigWriteModel, err error) {
	writeModel := NewIAMSMSConfigWriteModel(instanceID, id)
	err = c.eventstore.FilterToQueryReducer(ctx, writeModel)
	if err != nil {
		return nil, err
	}

	return writeModel, nil
}