package controller

import (
	"strings"

	zitadelv1alpha1 "bitbucket.org/topmanage-software-engineering/zitadel-k8s-operator/src/api/v1alpha1"
	"bitbucket.org/topmanage-software-engineering/zitadel-k8s-operator/src/pkg/controller/zitadel"

	"context"
	"fmt"

	"github.com/zitadel/zitadel-go/v2/pkg/client/management"
	pb "github.com/zitadel/zitadel-go/v2/pkg/client/zitadel/management"
	"sigs.k8s.io/controller-runtime/pkg/client"
	ctrlClient "sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)

const (
	machineuserFinalizerName = "machineuser.zitadel.topmanage.com/machineuser"
)

type wrappedMachineUserFinalizer struct {
	client.Client
	machineuser *zitadelv1alpha1.MachineUser
}

func newWrappedMachineUserFinalizer(client client.Client, machineuser *zitadelv1alpha1.MachineUser) zitadel.WrappedFinalizer {
	return &wrappedMachineUserFinalizer{
		Client:      client,
		machineuser: machineuser,
	}
}

func (wf *wrappedMachineUserFinalizer) AddFinalizer(ctx context.Context) error {
	if wf.ContainsFinalizer() {
		return nil
	}
	return wf.patch(ctx, wf.machineuser, func(machineuser *zitadelv1alpha1.MachineUser) {
		controllerutil.AddFinalizer(machineuser, machineuserFinalizerName)
	})
}

func (wf *wrappedMachineUserFinalizer) RemoveFinalizer(ctx context.Context) error {
	if !wf.ContainsFinalizer() {
		return nil
	}
	return wf.patch(ctx, wf.machineuser, func(machineuser *zitadelv1alpha1.MachineUser) {
		controllerutil.RemoveFinalizer(wf.machineuser, machineuserFinalizerName)
	})
}

func (wr *wrappedMachineUserFinalizer) ContainsFinalizer() bool {
	return controllerutil.ContainsFinalizer(wr.machineuser, machineuserFinalizerName)
}

func (wf *wrappedMachineUserFinalizer) Reconcile(ctx context.Context, ztdClient *management.Client) error {
	if wf.machineuser.Status.UserId == "" {
		return nil
	}
	{
		_, err := ztdClient.GetUserByID(ctx, &pb.GetUserByIDRequest{
			Id: wf.machineuser.Status.UserId,
		})
		if err != nil {
			if strings.Contains(err.Error(), `User doesn't exist`) {
				return nil
			}
			return err
		}
	}
	_, err := ztdClient.RemoveUser(ctx, &pb.RemoveUserRequest{
		Id: wf.machineuser.Status.UserId,
	})
	if err != nil {
		return err
	}
	return nil
}

func (wr *wrappedMachineUserFinalizer) patch(ctx context.Context, machineuser *zitadelv1alpha1.MachineUser,
	patchFn func(*zitadelv1alpha1.MachineUser)) error {
	patch := ctrlClient.MergeFrom(machineuser.DeepCopy())
	patchFn(machineuser)

	if err := wr.Client.Patch(ctx, machineuser, patch); err != nil {
		return fmt.Errorf("error patching MachineUser finalizer: %v", err)
	}
	return nil
}