/*
Copyright 2024.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package controller

import (
	"context"
	"fmt"
	"time"

	zitadelv1alpha1 "gitea.corredorconect.com/software-engineering/zitadel-resources-operator/api/v1alpha1"
	condition "gitea.corredorconect.com/software-engineering/zitadel-resources-operator/pkg/condition"
	"gitea.corredorconect.com/software-engineering/zitadel-resources-operator/pkg/controller/core"
	clientv2 "github.com/zitadel/zitadel-go/v3/pkg/client"
	"github.com/zitadel/zitadel-go/v3/pkg/client/zitadel/object/v2"
	"github.com/zitadel/zitadel-go/v3/pkg/client/zitadel/org/v2"
	"k8s.io/client-go/util/workqueue"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"
	ctrlClient "sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/controller"
	"sigs.k8s.io/controller-runtime/pkg/reconcile"
)

// OrganizationReconciler reconciles a Organization object
type OrganizationReconciler struct {
	client.Client
	RefResolver     *zitadelv1alpha1.RefResolver
	ConditionReady  *condition.Ready
	RequeueInterval time.Duration
}

func NewOrganizationReconciler(client client.Client, refResolver *zitadelv1alpha1.RefResolver, conditionReady *condition.Ready,
	requeueInterval time.Duration) *OrganizationReconciler {
	return &OrganizationReconciler{
		Client:          client,
		RefResolver:     refResolver,
		ConditionReady:  conditionReady,
		RequeueInterval: requeueInterval,
	}
}

//+kubebuilder:rbac:groups=zitadel.github.com,resources=organizations,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=zitadel.github.com,resources=organizations/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=zitadel.github.com,resources=organizations/finalizers,verbs=update

// Reconcile is part of the main kubernetes reconciliation loop which aims to
// move the current state of the cluster closer to the desired state.
func (r *OrganizationReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
	var organization zitadelv1alpha1.Organization
	if err := r.Get(ctx, req.NamespacedName, &organization); err != nil {
		return ctrl.Result{}, client.IgnoreNotFound(err)
	}
	wr := newWrappedOrganizationReconciler(r.Client, r.RefResolver, &organization)
	wf := newWrappedOrganizationFinalizer(r.Client, &organization)
	tf := core.NewCoreFinalizer(r.Client, wf)
	tr := core.NewCoreReconciler(r.Client, r.ConditionReady, wr, tf, r.RequeueInterval)

	result, err := tr.Reconcile(ctx, &organization)
	if err != nil {
		return result, fmt.Errorf("error reconciling in OrganizationReconciler: %v", err)
	}
	return result, nil
}

type wrappedOrganizationReconciler struct {
	client.Client
	refResolver  *zitadelv1alpha1.RefResolver
	organization *zitadelv1alpha1.Organization
}

func newWrappedOrganizationReconciler(client client.Client, refResolver *zitadelv1alpha1.RefResolver,
	organization *zitadelv1alpha1.Organization) core.WrappedCoreReconciler {
	return &wrappedOrganizationReconciler{
		Client:       client,
		refResolver:  refResolver,
		organization: organization,
	}
}

type orgReconcilePhase struct {
	Name      string
	Reconcile func(context.Context, *clientv2.Client) error
}

func (wr *wrappedOrganizationReconciler) Reconcile(ctx context.Context, ztdClient *clientv2.Client) error {
	phases := []orgReconcilePhase{
		{
			Name:      "organization",
			Reconcile: wr.reconcileOrg,
		},
	}
	for _, p := range phases {
		err := p.Reconcile(ctx, ztdClient)
		if err != nil {
			return err
		}
	}
	return nil
}

func (wr *wrappedOrganizationReconciler) reconcileOrg(ctx context.Context, ztdClient *clientv2.Client) error {
	var organizationId *string
	orgList, err := ztdClient.OrganizationServiceV2().ListOrganizations(ctx, &org.ListOrganizationsRequest{
		Queries: []*org.SearchQuery{
			{
				Query: &org.SearchQuery_NameQuery{
					NameQuery: &org.OrganizationNameQuery{
						Name:   wr.organization.Spec.OrganzationName,
						Method: object.TextQueryMethod_TEXT_QUERY_METHOD_EQUALS,
					},
				},
			},
		},
	})
	if err != nil {
		return fmt.Errorf("error listing organization: %v", err)
	}
	if len(orgList.Result) > 0 {
		organizationId = &orgList.Result[0].Id
	}

	if organizationId == nil {
		resp, err :=
			ztdClient.OrganizationServiceV2().AddOrganization(ctx, &org.AddOrganizationRequest{
				Name: wr.organization.Spec.OrganzationName,
			})
		if err != nil {
			return fmt.Errorf("error creating organization: %v", err)
		}
		organizationId = &resp.OrganizationId
	}
	patch := ctrlClient.MergeFrom(wr.organization.DeepCopy())
	wr.organization.Status.OrganizationId = organizationId
	return wr.Client.Status().Patch(ctx, wr.organization, patch)
}

func (wr *wrappedOrganizationReconciler) PatchStatus(ctx context.Context, patcher condition.Patcher) error {
	patch := client.MergeFrom(wr.organization.DeepCopy())
	patcher(&wr.organization.Status)

	if err := wr.Client.Status().Patch(ctx, wr.organization, patch); err != nil {
		return fmt.Errorf("error patching Organization status: %v", err)
	}
	return nil
}

// SetupWithManager sets up the controller with the Manager.
func (r *OrganizationReconciler) SetupWithManager(mgr ctrl.Manager) error {
	return ctrl.NewControllerManagedBy(mgr).
		For(&zitadelv1alpha1.Organization{}).
		WithOptions(controller.Options{RateLimiter: workqueue.NewTypedItemExponentialFailureRateLimiter[reconcile.Request](time.Millisecond*500, time.Minute*3)}).
		Complete(r)
}