/*
 * Copyright 2022 Red Hat, Inc. and/or its affiliates.
 *
 * 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 utils

import (
	"context"
	"fmt"
	"github.com/kiegroup/container-builder/util/log"
	"github.com/kiegroup/kogito-serverless-operator/constants"
	"github.com/pkg/errors"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"os"
	"sigs.k8s.io/controller-runtime/pkg/client"
)

// GetBuilderCommonConfigMap retrieves the config map with the builder common configuration information
func GetBuilderCommonConfigMap(client client.Client) (corev1.ConfigMap, error) {

	namespace, found := os.LookupEnv("POD_NAMESPACE")

	if !found {
		return corev1.ConfigMap{}, errors.New("ConfigMap not found")
	}

	existingConfigMap := corev1.ConfigMap{
		TypeMeta: metav1.TypeMeta{
			Kind:       "ConfigMap",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:      constants.BUILDER_CM_NAME,
			Namespace: namespace,
		},
		Data: map[string]string{},
	}

	err := client.Get(context.TODO(), types.NamespacedName{Name: constants.BUILDER_CM_NAME, Namespace: namespace}, &existingConfigMap)
	if err != nil {
		log.Error(err, "reading configmap")
		return corev1.ConfigMap{}, err
	}

	err = isValidBuilderCommonConfigMap(existingConfigMap)
	if err != nil {
		log.Error(err, "configmap is not valid")
		return existingConfigMap, err
	}

	return existingConfigMap, nil

}

// isValidBuilderCommonConfigMap  function that will verify that in the builder config maps there are the required keys and they aren't empty
func isValidBuilderCommonConfigMap(configMap corev1.ConfigMap) error {

	// Verifying that the key to hold the extension for the workflow is there and not empty
	if len(configMap.Data[constants.DEFAULT_WORKFLOW_EXTENSION_KEY]) == 0 {
		return errors.New(fmt.Sprintf("Unable to find %s key into builder config map", configMap.Data[constants.DEFAULT_WORKFLOW_EXTENSION_KEY]))
	}

	// Verifying that the key to hold the name of the Dockerfile for building the workflow is there and not empty
	if len(configMap.Data[constants.DEFAULT_BUILDER_RESOURCE_NAME_KEY]) == 0 {
		return errors.New(fmt.Sprintf("Unable to find %s key into builder config map", configMap.Data[constants.DEFAULT_BUILDER_RESOURCE_NAME_KEY]))
	}

	// Verifying that the key to hold the content of the Dockerfile for building the workflow is there and not empty
	if len(configMap.Data[configMap.Data[constants.DEFAULT_BUILDER_RESOURCE_NAME_KEY]]) == 0 {
		return errors.New(fmt.Sprintf("Unable to find %s key into builder config map", configMap.Data[constants.DEFAULT_BUILDER_RESOURCE_NAME_KEY]))
	}
	return nil
}