// RAINBOND, Application Management Platform
// Copyright (C) 2014-2017 Goodrain Co., Ltd.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"github.com/urfave/cli"
	"github.com/Sirupsen/logrus"
	"github.com/goodrain/rainbond/pkg/grctl/clients"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/fields"
	"github.com/apcera/termtables"
	"fmt"
	"github.com/goodrain/rainbond/pkg/node/api/model"
	"strings"
	"strconv"
	"errors"
	"time"
	"encoding/json"
	"bytes"
	"os"
	"io/ioutil"
)

func NewCmdShow() cli.Command {
	c:=cli.Command{
		Name:"show",
		Usage:"显示region安装完成后访问地址",
		Action: func(c *cli.Context) error {
			manageHosts:=clients.NodeClient.Nodes().Rule("manage")
			ips:=getExternalIP("/etc/goodrain/envs/.exip",manageHosts)
			fmt.Println("Manage your apps with webui：")
			for _,v:=range ips{
				url:=v+":7070"
				fmt.Print(url+"  ")
			}
			fmt.Println()
			fmt.Println("The webui use websocket to provide more feture：")
			for _,v:=range ips{
				url:=v+":6060"
				fmt.Print(url+"  ")
			}
			fmt.Println()
			fmt.Println("Your web apps use nginx for reverse proxy:")
			for _,v:=range ips{
				url:=v+":80"
				fmt.Print(url+"  ")
			}
			fmt.Println()
			return nil
		},
	}
	return c
}

func getExternalIP(path string,node []*model.HostNode) []string {
	var result []string
	if fileExist(path) {
		externalIP, err := ioutil.ReadFile(path)
		if err != nil {
			return nil
		}
		strings.TrimSpace(string(externalIP))
		result=append(result,strings.TrimSpace(string(externalIP)))
	}else {
		for _,v:=range node {
			result=append(result,v.InternalIP)
		}
	}
	return result
}
func fileExist(path string) bool {
	_, err := os.Stat(path)
	if err == nil {
		return true
	}
	if os.IsNotExist(err) {
		return false
	}
	return false
}
func handleStatus(serviceTable *termtables.Table ,ready bool ,v *model.HostNode)  {
	if v.Role.HasRule("compute")&&!v.Role.HasRule("manage") {
		if ready {
			//	 true of false
			serviceTable.AddRow(v.ID,v.InternalIP,v.HostName,v.Role.String(),v.Alived,!v.Unschedulable,ready)
		}else {
			//scheduable==false

			serviceTable.AddRow(v.ID,v.InternalIP,v.HostName,v.Role.String(),v.Alived,false,ready)
		}
	}else if v.Role.HasRule("manage")&&!v.Role.HasRule("compute") {
		//scheduable="n/a"
		serviceTable.AddRow(v.ID,v.InternalIP,v.HostName,v.Role.String(),v.Alived,"N/A",ready)
	}else if v.Role.HasRule("compute") && v.Role.HasRule("manage") {
		if !ready {
			//n/a
			serviceTable.AddRow(v.ID,v.InternalIP,v.HostName,v.Role.String(),v.Alived,"N/A",ready)
		}else{
			serviceTable.AddRow(v.ID,v.InternalIP,v.HostName,v.Role.String(),v.Alived,!v.Unschedulable,ready)
		}
	}
}
func NewCmdNode() cli.Command {
	c:=cli.Command{
		Name:  "node",
		Usage: "节点。grctl node",
		Subcommands:[]cli.Command{
			{
				Name:  "get",
				Usage: "get hostID/internal ip",
				Action: func(c *cli.Context) error {
					id:=c.Args().First()
					if id == "" {
						logrus.Errorf("need args")
						return nil
					}

					nodes:=clients.NodeClient.Nodes().List()
					for _,v:=range nodes{
						if v.InternalIP==id{
							id=v.ID
							break
						}
					}

					n:=clients.NodeClient.Nodes().Get(id)
					v:=n.Node
					nodeByte,_:=json.Marshal(v)
					var out bytes.Buffer
					err := json.Indent(&out, nodeByte, "", "\t")
					if err != nil {
						logrus.Error("error format json details %s",err.Error())
						return err
					}
					fmt.Println(out.String())
					return nil
				},
			},
			{
				Name:  "list",
				Usage: "list",
				Action: func(c *cli.Context) error {
					list:=clients.NodeClient.Nodes().List()
					serviceTable := termtables.CreateTable()
					serviceTable.AddHeaders("uid", "IP", "HostName","role","alived","schedulable","ready")
					var rest []*model.HostNode
					for _,v:=range list{

						var ready bool=false
						if (v.NodeStatus!=nil){
							ready=true
						}
						if v.Role.HasRule("manage") {
							handleStatus(serviceTable,ready,v)
						}else{
							rest=append(rest,v)
						}
					}
					if len(rest)>0 {
						serviceTable.AddSeparator()
					}
					for _,v:=range rest{
						var ready bool=false
						if (v.NodeStatus!=nil){
							ready=true
						}
						handleStatus(serviceTable,ready,v)
					}
					fmt.Println(serviceTable.Render())
					return nil
				},
			},
			{
				Name:  "up",
				Usage: "up hostID",
				Action: func(c *cli.Context) error {
					id:=c.Args().First()
					if id == "" {
						logrus.Errorf("need hostID")
						return nil
					}
					clients.NodeClient.Nodes().Get(id).Up()
					return nil
				},
			},
			{
				Name:  "down",
				Usage: "down hostID",
				Action: func(c *cli.Context) error {
					id:=c.Args().First()
					if id == "" {
						logrus.Errorf("need hostID")
						return nil
					}
					clients.NodeClient.Nodes().Get(id).Down()
					return nil
				},
			},
			{
				Name:  "unscheduable",
				Usage: "unscheduable hostID",
				Action: func(c *cli.Context) error {
					id:=c.Args().First()
					if id == "" {
						logrus.Errorf("need hostID")
						return nil
					}
					node:=clients.NodeClient.Nodes().Get(id)
					if node.Node.Role.HasRule("manage") {
						logrus.Errorf("管理节点不支持此功能")
						return nil
					}
					clients.NodeClient.Nodes().Get(id).UnSchedulable()
					return nil
				},
			},
			{
				Name:  "rescheduable",
				Usage: "rescheduable hostID",
				Action: func(c *cli.Context) error {
					id:=c.Args().First()
					if id == "" {
						logrus.Errorf("need hostID")
						return nil
					}
					node:=clients.NodeClient.Nodes().Get(id)
					if node.Node.Role.HasRule("manage") {
						logrus.Errorf("管理节点不支持此功能")
						return nil
					}
					clients.NodeClient.Nodes().Get(id).ReSchedulable()
					return nil
				},
			},
			{
				Name:  "delete",
				Usage: "delete hostID",
				Action: func(c *cli.Context) error {
					id:=c.Args().First()
					if id == "" {
						logrus.Errorf("need hostID")
						return nil
					}
					clients.NodeClient.Nodes().Get(id).Delete()
					return nil
				},
			},
			{
				Name:  "rule",
				Usage: "rule ruleName",
				Action: func(c *cli.Context) error {
					rule:=c.Args().First()
					if rule == "" {
						logrus.Errorf("need rule name")
						return nil
					}
					clients.NodeClient.Nodes().Rule(rule)
					return nil
				},
			},
			{
				Name:  "label",
				Usage: "label hostID",
				Flags: []cli.Flag{
					cli.StringFlag{
						Name:  "key",
						Value: "",
						Usage: "key",
					},
					cli.StringFlag{
						Name:  "val",
						Value: "",
						Usage: "val",
					},
				},
				Action: func(c *cli.Context) error {
					hostID:=c.Args().First()
					if hostID == "" {
						logrus.Errorf("need hostID")
						return nil
					}
					k:=c.String("key")
					v:=c.String("val")
					label:=make(map[string]string)
					label[k]=v
					clients.NodeClient.Nodes().Get(hostID).Label(label)
					return nil
				},
			},
			{
				Name:  "add",
				Usage: "add 添加节点",
				Flags: []cli.Flag{
					cli.StringFlag{
						Name:  "Hostname,hn",
						Value:"",
						Usage: "Hostname",
					},
					cli.StringFlag{
						Name:  "InternalIP,i",
						Value:"",
						Usage: "InternalIP|required",
					},
					cli.StringFlag{
						Name:  "ExternalIP,e",
						Value:"",
						Usage: "ExternalIP",
					},
					cli.StringFlag{
						Name:  "RootPass,p",
						Value:"",
						Usage: "RootPass",
					},
					cli.StringFlag{
						Name:  "Role,ro",
						Usage: "Role|required",
					},
				},
				Action: func(c *cli.Context) error {
					var node model.APIHostNode
					if c.IsSet("Role"){
						node.Role=append(node.Role,c.String("Role"))
						node.InternalIP=c.String("InternalIP")
						node.HostName=c.String("HostName")
						node.ExternalIP=c.String("ExternalIP")
						node.RootPass=c.String("RootPass")

						clients.NodeClient.Nodes().Add(&node)
						fmt.Println("开始初始化节点")
						for true {
							time.Sleep(3*time.Second)
							list := clients.NodeClient.Nodes().List()
							for _, v := range list {
								if (node.InternalIP == v.InternalIP) {

									tableC := termtables.CreateTable()
									var header []string
									var content []string
									for _,val:=range v.Conditions{
										header=append(header,string(val.Type))
										content=append(content,string(val.Status))
									}
									if (v.Alived) {
										fmt.Printf("节点 %s 初始化成功",v.ID)
										fmt.Println()
										tableC.AddHeaders(header)
										tableC.AddRow(content)
										fmt.Println(tableC.Render())
										return nil
									}else{
										fmt.Printf("..")
									}


									//todo  初始化其它节点失败判定
								}
							}
						}
						return nil
					}

					return errors.New("role must not null")
				},
			},
		},
	}
	return c
}

func NewCmdNodeRes() cli.Command {
	c:=cli.Command{
		Name:  "noderes",
		Usage: "获取计算节点资源信息  grctl noderes",
		Action: func(c *cli.Context) error {
			Common(c)
			return getNodeWithResource(c)
		},
	}
	return c
}

func getNodeWithResource(c *cli.Context) error {
	ns, err :=clients.K8SClient.Core().Nodes().List(metav1.ListOptions{})
	if err != nil {
		logrus.Errorf("获取节点列表失败,details: %s",err.Error())
		return err
	}


	table := termtables.CreateTable()
	table.AddHeaders("NodeName", "Version", "CapCPU(核)", "AllocatableCPU(核)","UsedCPU(核)", "CapMemory(M)","AllocatableMemory(M)","UsedMemory(M)")
	for _,v:=range ns.Items {

		podList, err := clients.K8SClient.Core().Pods(metav1.NamespaceAll).List(metav1.ListOptions{FieldSelector: fields.SelectorFromSet(fields.Set{"spec.nodeName": v.Name}).String()})
		if err != nil {

		}
		var cpuPerNode=0
		memPerNode:=0
		for _,p:=range podList.Items{
			status:=string(p.Status.Phase)

			if status!="Running" {
				continue
			}
			memPerPod:=0

			memPerPod+=int(p.Spec.Containers[0].Resources.Requests.Memory().Value())
			cpuOfPod:=p.Spec.Containers[0].Resources.Requests.Cpu().String()
			if strings.Contains(cpuOfPod,"m") {
				cpuOfPod=strings.Replace(cpuOfPod,"m","",-1)
			}
			cpuI,_:=strconv.Atoi(cpuOfPod)
			cpuPerNode+=cpuI
			memPerNode+=memPerPod
		}
		capCPU:=v.Status.Capacity.Cpu().Value()
		capMem:=v.Status.Capacity.Memory().Value()
		allocCPU:=v.Status.Allocatable.Cpu().Value()
		allocMem:=v.Status.Allocatable.Memory().Value()
		table.AddRow(v.Name,v.Status.NodeInfo.KubeletVersion,capCPU,allocCPU,float32(cpuPerNode)/1000,capMem/1024/1024,allocMem/1024/1024,memPerNode/1024/1024)
	}
	fmt.Println(table.Render())
	return nil
}

func getNode(c *cli.Context) error {
	ns, err :=clients.K8SClient.Core().Nodes().List(metav1.ListOptions{})
	if err != nil {
		logrus.Errorf("获取节点列表失败,details: %s",err.Error())
		return err
	}
	table := termtables.CreateTable()
	table.AddHeaders("Name", "Status", "Namespace","Unschedulable", "KubeletVersion","Labels")

	for _,v:=range ns.Items{
		cs:=v.Status.Conditions
		status:="unknown"
		for _,cv:=range cs{
			status=string(cv.Status)
			if strings.Contains(status,"rue"){
				status=string(cv.Type)
				break
			}
		}
		m:=v.Labels
		labels:=""
		for k:=range m {
			labels+=k
			labels+=" "
		}
		table.AddRow(v.Name, status,v.Namespace,v.Spec.Unschedulable, v.Status.NodeInfo.KubeletVersion,labels)
	}
	fmt.Println(table.Render())
	return nil
}