// +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 helm

import (
	"errors"
	"log"

	"github.com/docker/compose-cli/api/compose"
	action "helm.sh/helm/v3/pkg/action"
	chart "helm.sh/helm/v3/pkg/chart"
	loader "helm.sh/helm/v3/pkg/chart/loader"
	env "helm.sh/helm/v3/pkg/cli"
	"helm.sh/helm/v3/pkg/release"
)

// Actions helm actions
type Actions struct {
	Config       *action.Configuration
	Settings     *env.EnvSettings
	kubeConnInit bool
}

// NewHelmActions new helm action
func NewHelmActions(settings *env.EnvSettings) *Actions {
	if settings == nil {
		settings = env.New()
	}
	return &Actions{
		Config:       new(action.Configuration),
		Settings:     settings,
		kubeConnInit: false,
	}
}

func (hc *Actions) initKubeClient() error {
	if hc.kubeConnInit {
		return nil
	}
	if err := hc.Config.Init(
		hc.Settings.RESTClientGetter(),
		hc.Settings.Namespace(),
		"configmap",
		log.Printf,
	); err != nil {
		log.Fatal(err)
	}
	if err := hc.Config.KubeClient.IsReachable(); err != nil {
		return err
	}
	hc.kubeConnInit = true
	return nil
}

//InstallChartFromDir install from dir
func (hc *Actions) InstallChartFromDir(name string, chartpath string) error {
	chart, err := loader.Load(chartpath)
	if err != nil {
		return err
	}
	return hc.InstallChart(name, chart)
}

// InstallChart instal chart
func (hc *Actions) InstallChart(name string, chart *chart.Chart) error {
	err := hc.initKubeClient()
	if err != nil {
		return err
	}

	actInstall := action.NewInstall(hc.Config)
	actInstall.ReleaseName = name
	actInstall.Namespace = hc.Settings.Namespace()

	release, err := actInstall.Run(chart, map[string]interface{}{})
	if err != nil {
		return err
	}
	log.Println("Release status: ", release.Info.Status)
	log.Println(release.Info.Description)
	return nil
}

// Uninstall uninstall chart
func (hc *Actions) Uninstall(name string) error {
	err := hc.initKubeClient()
	if err != nil {
		return err
	}

	release, err := hc.Get(name)
	if err != nil {
		return err
	}
	if release == nil {
		return errors.New("no release found with the name provided")
	}
	actUninstall := action.NewUninstall(hc.Config)
	response, err := actUninstall.Run(name)
	if err != nil {
		return err
	}
	log.Println(response.Release.Info.Description)
	return nil
}

// Get get released object for a named chart
func (hc *Actions) Get(name string) (*release.Release, error) {
	err := hc.initKubeClient()
	if err != nil {
		return nil, err
	}
	actGet := action.NewGet(hc.Config)
	return actGet.Run(name)
}

// ListReleases lists chart releases
func (hc *Actions) ListReleases() ([]compose.Stack, error) {
	err := hc.initKubeClient()
	if err != nil {
		return nil, err
	}
	actList := action.NewList(hc.Config)
	releases, err := actList.Run()
	if err != nil {
		return nil, err
	}
	result := []compose.Stack{}
	for _, rel := range releases {
		result = append(result, compose.Stack{
			ID:     rel.Name,
			Name:   rel.Name,
			Status: string(rel.Info.Status),
		})
	}
	return result, nil
}