package helmhelper

import (
	"fmt"
	"os"
	"strings"

	"github.com/sirupsen/logrus"
	"gopkg.in/yaml.v2"
	"helm.sh/helm/v3/pkg/action"
	"helm.sh/helm/v3/pkg/cli"
	"helm.sh/helm/v3/pkg/getter"
	"helm.sh/helm/v3/pkg/registry"
	"helm.sh/helm/v3/pkg/repo"
)

type Helm struct{}

func NewHelm() Helmhelper {
	return &Helm{}
}

func getDownloadDirPath(workdirPath string) string {
	return fmt.Sprintf("%s/.charts", workdirPath)
}

func getChartDirPath(downloadDirPath string, release *ChartData) string {
	return fmt.Sprintf("%s/%s-%s-%s", downloadDirPath, release.RepositoryName, release.Name, release.Version)

}

func (h *Helm) PullChart(workdirPath string, release *ChartData) (path string, err error) {
	downloadDirPath := getDownloadDirPath(workdirPath)
	if err := os.MkdirAll(downloadDirPath, 0777); err != nil {
		return "", err
	}

	config := new(action.Configuration)
	cl := cli.New()
	chartDir := getChartDirPath(downloadDirPath, release)
	_, err = os.Stat(chartDir)

	if err != nil && !os.IsNotExist(err) {
		return "", nil
	} else if os.IsNotExist(err) {
		if err := os.Mkdir(chartDir, 0777); err != nil {
			return "", err
		}
		registry, err := registry.NewClient()
		if err != nil {
			return "", err
		}

		var path string
		// Download the chart to the workdir
		if release.RepositoryKind != "oci" {
			r, err := repo.NewChartRepository(&repo.Entry{
				Name: release.RepositoryName,
				URL:  release.RepositoryURL,
			}, getter.All(cl))
			if err != nil {
				return "", err
			}
			path = r.Config.Name

		} else {
			path = release.RepositoryURL
		}

		client := action.NewPullWithOpts(action.WithConfig(config))
		client.SetRegistryClient(registry)
		client.Untar = true
		client.DestDir = chartDir
		client.Settings = cl

		chartRemote := fmt.Sprintf("%s/%s", path, release.Name)
		logrus.Infof("trying to pull: %s", chartRemote)
		if _, err = client.Run(chartRemote); err != nil {
			return "", err
		}
	}
	path, err = getChartPathFromDir(chartDir)
	if err != nil {
		return "", err
	}

	return path, nil
}

func (h *Helm) FindLatestVersion(workdirPath string, release *ChartData) (version string, err error) {
	downloadDirPath := getDownloadDirPath(workdirPath)
	if err := os.MkdirAll(downloadDirPath, 0777); err != nil {
		return "", err
	}

	config := new(action.Configuration)
	cl := cli.New()
	chartDir := getChartDirPath(downloadDirPath, release)
	chartPath, err := h.PullChart(workdirPath, release)
	if err != nil {
		return "", err
	}

	showAction := action.NewShowWithConfig(action.ShowChart, config)

	res, err := showAction.LocateChart(fmt.Sprintf("%s/%s", chartDir, chartPath), cl)
	if err != nil {
		return "", err
	}
	res, err = showAction.Run(res)
	if err != nil {
		return "", nil
	}

	chartData, err := chartFromString(res)
	if err != nil {
		return "", err
	}
	logrus.Infof("the latest version of %s is %s", release.Name, chartData.Version)
	release.Version = chartData.Version
	versionedChartDir := getChartDirPath(downloadDirPath, release)
	if err := os.Rename(chartDir, versionedChartDir); err != nil {
		return "", err
	}
	return chartData.Version, err
}

func (h *Helm) PushChart(workdirPath string, server, prefix, username, password string, chartdata *ChartData) (err error) {
	downloadDirPath := getDownloadDirPath(workdirPath)
	chartDir := getChartDirPath(downloadDirPath, chartdata)
	_, err = os.Stat(chartDir)
	if err != nil && !os.IsNotExist(err) {
		return err
	} else if os.IsNotExist(err) {
		if err := os.Mkdir(chartDir, 0777); err != nil {
			return err
		}
	}
	regclient, err := registry.NewClient()
	options := registry.LoginOptBasicAuth("allanger", "")
	tls := registry.LoginOptInsecure(true)
	serverClean := strings.ReplaceAll(server, "oci://", "")

	if err :=regclient.Login(serverClean, options, tls); err != nil {
		return err
	}
		if err != nil {
			return err
		}
		versionedChartDir := fmt.Sprintf("%s/%s", getChartDirPath(downloadDirPath, chartdata), chartdata.Name)
		
		tar := action.NewPackage()
		tar.Destination = downloadDirPath
		logrus.Info(versionedChartDir)
		logrus.Info(chartDir)
		tarname, err := tar.Run(versionedChartDir, nil)
		//		tarpath := fmt.Sprintf("%s/%s", versionedChartDir, tarname)
		if err != nil {
			return err
		}
		client := action.NewPushWithOpts(action.WithPushConfig(&action.Configuration{}))
		logrus.Infof("trying to push: %s", tarname)
		client.Settings = &cli.EnvSettings{}
		smth, err := client.Run(tarname, fmt.Sprintf("%s/%s", server, prefix))
		if err != nil {
			return err 
		}
		logrus.Info(smth)
		return nil
}
func (h *Helm) RenderChart(workdirPath string, release *ReleaseData) error {
	return nil
//	downloadDirPath := getDownloadDirPath(workdirPath)
//	chartDirPath := getChartDirPath(downloadDirPath, release)
//	chartPath, err := getChartPathFromDir(chartDirPath)
//	if err != nil {
//		return err
//	}
//	logrus.Info(fmt.Sprintf("%s/%s", chartDirPath, chartPath))
//	chartObj, err := loader.Load(fmt.Sprintf("%s/%s", chartDirPath, chartPath))
//	if err != nil {
//		return err
//	}
//	values := chartutil.Values{}
//	values["Values"] = chartObj.Values
//	values["Release"] = map[string]string{
//		"Name":      release.Name,
//		"Namespace": release.Namespace,
//	}
//	values["Capabilities"] = map[string]map[string]string{
//		"KubeVersion": {
//			"Version":    "v1.27.9",
//			"GitVersion": "v1.27.9",
//		},
//	}
//	files, err := engine.Engine{Strict: false}.Render(chartObj, values)
//	if err != nil {
//		return err
//	}
//	logrus.Info(files)
//	for file, data := range files {
//		logrus.Infof("%s - %s", file, data)
//	}
//	logrus.Info("I'm here")
//	return nil
}


func getChartPathFromDir(downloadDir string) (file string, err error) {
	files, err := os.ReadDir(downloadDir)
	if err != nil {
		return "", err
	} else if len(files) == 0 {
		return "", fmt.Errorf("expected to have one file, got zero in a dir %s", downloadDir)
	} else if len(files) > 1 {
		return "", fmt.Errorf("expected to have only one file in a dir %s", downloadDir)
	}
	return files[0].Name(), nil
}

func chartFromString(info string) (*ChartData, error) {
	releaseData := new(ChartData)
	if err := yaml.Unmarshal([]byte(info), &releaseData); err != nil {
		return nil, err
	}
	return releaseData, nil
}