package controllers

import (
	"context"
	"errors"
	"fmt"
	"log"
	"strings"

	"github.com/joho/godotenv"

	"git.badhouseplants.net/softplayer/softplayer-backend/internal/helpers/kube"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/rest"
	ctrl "sigs.k8s.io/controller-runtime"
)

type Environemnt struct {
	Controller ctrl.Manager
	UserID     string
	Data       *EnvironemntData
	Token      string
}

type EnvironemntData struct {
	Name        string
	Provider    string
	Kubernetes  string
	HetznerData HetznerData
}

type HetznerData struct {
	ServerLocation string
	ServerType     string
}

func (e *EnvironemntData) buildVars() string {
	vars := fmt.Sprintf("SP_PROVIDER=%s\nSP_KUBERNETES=%s", e.providerFmt(), e.kubernetesFmt())
	return vars
}

func (e *EnvironemntData) providerFmt() string {
	res := strings.Replace(e.Provider, "PROVIDER_", "", -1)
	return strings.ToLower(res)
}

func (e *EnvironemntData) kubernetesFmt() string {
	res := strings.Replace(e.Kubernetes, "KUBERNETES_", "", -1)
	return strings.ToLower(res)
}

func (env *Environemnt) isNsVerified(ctx context.Context) error {
	client := env.Controller.GetClient()
	ns := &corev1.Namespace{}
	if err := client.Get(ctx, types.NamespacedName{Name: env.UserID}, ns); err != nil {
		return err
	}

	val, ok := ns.GetLabels()["email-verified"]
	if !ok || val == "false" {
		return errors.New("User email is not verified, can't create an new env")
	}
	return nil
}

// Create environment should create a new configmap in the user's namespace
// using a token that belongs to the user.
func (env *Environemnt) Create(ctx context.Context) error {
	if err := env.isNsVerified(ctx); err != nil {
		log.Println("Can't verify ns")
		return err
	}
	env.Controller.GetClient()
	conf := &rest.Config{
		Host:        "https://kubernetes.default.svc.cluster.local:443",
		BearerToken: env.Token,
		TLSClientConfig: rest.TLSClientConfig{
			Insecure: true,
		},
	}

	controller, err := ctrl.NewManager(conf, ctrl.Options{})

	if err != nil {
		return err
	}

	obj := corev1.ConfigMap{
		ObjectMeta: metav1.ObjectMeta{
			Name:      env.Data.Name,
			Namespace: env.UserID,
			Labels: map[string]string{
				"component": "bootstrap",
				"kind":      "environment",
			},
		},
		Data: map[string]string{
			"vars": env.Data.buildVars(),
		},
	}
	if err := kube.Create(ctx, controller.GetClient(), &obj, false); err != nil {
		return err
	}

	return nil
}

func (env *Environemnt) Delete(ctx context.Context) error {
	env.Controller.GetClient()
	conf := &rest.Config{
		Host:        "https://kubernetes.default.svc.cluster.local:443",
		BearerToken: env.Token,
		TLSClientConfig: rest.TLSClientConfig{
			Insecure: true,
		},
	}

	controller, err := ctrl.NewManager(conf, ctrl.Options{})

	if err != nil {
		return err
	}

	obj := corev1.ConfigMap{
		ObjectMeta: metav1.ObjectMeta{
			Name:      env.Data.Name,
			Namespace: env.UserID,
			Labels: map[string]string{
				"component": "bootstrap",
			},
		},
		Data: map[string]string{
			"vars": env.Data.buildVars(),
		},
	}
	if err := kube.Delete(ctx, controller.GetClient(), &obj, false); err != nil {
		return err
	}

	return nil
}

func (env *Environemnt) ListEnvs(ctx context.Context) ([]string, error) {
	env.Controller.GetClient()
	conf := &rest.Config{
		Host:        "https://kubernetes.default.svc.cluster.local:443",
		BearerToken: env.Token,
		TLSClientConfig: rest.TLSClientConfig{
			Insecure: true,
		},
	}
	clientset, err := kubernetes.NewForConfig(conf)
	if err != nil {
		return []string{}, err
	}
	secrets, err := clientset.CoreV1().ConfigMaps(env.UserID).List(ctx, metav1.ListOptions{LabelSelector: "kind=environment"})
	if err != nil {
		return []string{}, err
	}

	result := []string{}
	log.Println(secrets)
	for _, env := range secrets.Items {
		result = append(result, env.Name)
	}
	return result, nil
}

func (env *Environemnt) Get(ctx context.Context) error {
	env.Controller.GetClient()
	conf := &rest.Config{
		Host:        "https://kubernetes.default.svc.cluster.local:443",
		BearerToken: env.Token,
		TLSClientConfig: rest.TLSClientConfig{
			Insecure: true,
		},
	}
	clientset, err := kubernetes.NewForConfig(conf)
	if err != nil {
		return err
	}
	envData, err := clientset.CoreV1().ConfigMaps(env.UserID).Get(ctx, env.Data.Name, metav1.GetOptions{})
	if err != nil {
		return err
	}

	res, err := godotenv.Unmarshal(envData.Data["vars"])
	if err != nil {
		return err
	}

	env.Data.Provider = res["SP_PROVIDER"]
	env.Data.Kubernetes = res["SP_KUBERNETES"]
	return nil
}