package internal

import (
	"bytes"
	"fmt"
	"oc-k8s/utils"
	"os"
	"os/exec"
)

func Help_Cluster() {
	fmt.Println(`
Cluster commands: oc-k8s <action> cluster [env_folder] [release]
  create   - Create a new kind cluster named 'opencloud'
  delete   - Delete the kind cluster named 'opencloud'
  help     - Show this help message

Usage:
  oc-k8s create cluster [env_folder] [release]
	env_folder - Helm config folder (required, default: .)
    release   - Release values name (required, default: dev)
  oc-k8s delete cluster [env_folder] [release]
  	env_folder - Helm config folder (required, default: .)
    release   - Release values name (required, default: dev)
  oc-k8s help cluster `)
}

func Delete_Cluster(args ...string) error {
	folder := "."
	env := "dev"
	if len(args) > 0 {
		folder = args[0]
	}
	if len(args) > 1 {
		env = args[1]
	}
	clusterName := "opencloud"
	if b, err := os.ReadFile(folder + "/" + env + "-values.yaml"); err == nil {
		clusterName, _ = utils.Extract(string(b), "clusterName")
	}
	utils.Exec("kind delete cluster --name " + clusterName)
	return nil
}

func Create_Cluster(args ...string) error {
	Delete_Cluster(args...)
	folder := "."
	env := "dev"
	if len(args) > 0 {
		folder = args[0]
	}
	if len(args) > 1 {
		env = args[1]
	}
	clusterName := "opencloud"
	if b, err := os.ReadFile(folder + "/" + env + "-values.yaml"); err == nil {
		clusterName, _ = utils.Extract(string(b), "clusterName")
	}
	utils.Exec("kubectl apply -f https://raw.githubusercontent.com/longhorn/longhorn/v1.9.0/deploy/longhorn.yaml ")

	kindConfig := `
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
- role: control-plane
  kubeadmConfigPatches:
  - |
    kind: InitConfiguration
    nodeRegistration:
      kubeletExtraArgs:
        node-labels: "ingress-ready=true"
  extraPortMappings:
  - containerPort: 30950
    hostPort: 80
    protocol: TCP
  - containerPort: 30951
    hostPort: 443
    protocol: TCP
containerdConfigPatches:
- |-
  [plugins."io.containerd.grpc.v1.cri".registry.mirrors."localhost:5000"]
    endpoint = ["http://dev-docker-registry-ui-registry-server.opencloud.svc.cluster.local:5000"]
`

	cmd := exec.Command("kind", "create", "cluster", "--name", clusterName, "--config=-")
	cmd.Stdin = bytes.NewBufferString(kindConfig)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr

	if err := cmd.Run(); err != nil {
		return err
	}

	fmt.Println("[WARNING] New cluster should be merged into your current config !")

	if err := utils.Exec("kind get kubeconfig --name " + clusterName + " > /tmp/kind-" + clusterName + ".kubeconfig"); err != nil {
		return err
	}
	if err := utils.Exec("KUBECONFIG=~/.kube/config:/tmp/kind-" + clusterName + ".kubeconfig kubectl config view --flatten --merge --minify > /tmp/merged-kubeconfig.yaml"); err != nil {
		return err
	}
	if err := utils.Exec("sudo mv /tmp/merged-kubeconfig.yaml ~/.kube/config"); err != nil {
		return err
	}
	if err := utils.Exec("chmod 600 ~/.kube/config"); err != nil {
		return err
	}
	if err := utils.Exec("kubectl config get-contexts"); err != nil {
		return err
	}
	if err := utils.Exec("kubectl config use-context kind-opencloud"); err != nil {
		return err
	}
	return nil
}