// +build kube

/*
   Copyright 2020 Docker Compose CLI authors

   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 context

import (
	"context"
	"fmt"

	"github.com/pkg/errors"
	"github.com/spf13/cobra"

	"github.com/docker/compose-cli/api/context/store"
	"github.com/docker/compose-cli/api/errdefs"
	"github.com/docker/compose-cli/kube"
)

func init() {
	extraCommands = append(extraCommands, createKubeCommand)
	extraHelp = append(extraHelp, `
Create a Kube context:
$ docker context create kube CONTEXT [flags]
(see docker context create kube --help)
`)
}

func createKubeCommand() *cobra.Command {
	var opts kube.ContextParams
	cmd := &cobra.Command{
		Use:   "kube CONTEXT [flags]",
		Short: "Create context for a Kubernetes Cluster",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			opts.Name = args[0]

			if opts.Endpoint != "" {
				opts.FromEnvironment = false
			}
			return runCreateKube(cmd.Context(), args[0], opts)
		},
	}

	addDescriptionFlag(cmd, &opts.Description)
	cmd.Flags().StringVar(&opts.Endpoint, "endpoint", "", "The endpoint of the Kubernetes manager")
	cmd.Flags().BoolVar(&opts.FromEnvironment, "from-env", true, "Get endpoint and creds from env vars")
	return cmd
}

func runCreateKube(ctx context.Context, contextName string, opts kube.ContextParams) error {
	if contextExists(ctx, contextName) {
		return errors.Wrapf(errdefs.ErrAlreadyExists, "context %q", contextName)
	}

	contextData, description, err := createContextData(ctx, opts)
	if err != nil {
		return err
	}
	return createDockerContext(ctx, contextName, store.KubeContextType, description, contextData)
}

func createContextData(ctx context.Context, opts kube.ContextParams) (interface{}, string, error) {
	description := ""
	if opts.Description != "" {
		description = fmt.Sprintf("%s (%s)", opts.Description, description)
	}

	return store.KubeContext{
		Endpoint:        opts.Endpoint,
		FromEnvironment: opts.FromEnvironment,
	}, description, nil
}