package main

import (
	"fmt"
	"os"
	path "path/filepath"
	"strings"
)

var cmdApiapp = &Command{
	// CustomFlags: true,
	UsageLine: "api [appname]",
	Short:     "create an api application base on beego framework",
	Long: `
create an api application base on beego framework

In the current path, will create a folder named [appname]

In the appname folder has the follow struct:

	├── conf
	│   └── app.conf
	├── controllers
	│   └── default.go
	├── main.go
	└── models
	    └── object.go             

`,
}

var apiconf = `
appname = {{.Appname}}
httpport = 8080
runmode = dev
autorender = false
copyrequestbody = true
`
var apiMaingo = `package main

import (
	"github.com/astaxie/beego"
	"{{.Appname}}/controllers"
)

//		Objects

//	URL					HTTP Verb				Functionality
//	/object				POST					Creating Objects
//	/object/<objectId>	GET						Retrieving Objects
//	/object/<objectId>	PUT						Updating Objects
//	/object				GET						Queries
//	/object/<objectId>	DELETE					Deleting Objects

func main() {
	beego.RESTRouter("/object", &controllers.ObejctController{})
	beego.Run()
}
`
var apiModels = `package models

import (
	"errors"
	"strconv"
	"time"
)

var (
	Objects map[string]*Object
)

type Object struct {
	ObjectId   string
	Score      int64
	PlayerName string
}

func init() {
	Objects = make(map[string]*Object)
	Objects["hjkhsbnmn123"] = &Object{"hjkhsbnmn123", 100, "astaxie"}
	Objects["mjjkxsxsaa23"] = &Object{"mjjkxsxsaa23", 101, "someone"}
}

func AddOne(object Object) (ObjectId string) {
	object.ObjectId = "astaxie" + strconv.FormatInt(time.Now().UnixNano(), 10)
	Objects[object.ObjectId] = &object
	return object.ObjectId
}

func GetOne(ObjectId string) (object *Object, err error) {
	if v, ok := Objects[ObjectId]; ok {
		return v, nil
	}
	return nil, errors.New("ObjectId Not Exist")
}

func GetAll() map[string]*Object {
	return Objects
}

func Update(ObjectId string, Score int64) (err error) {
	if v, ok := Objects[ObjectId]; ok {
		v.Score = Score
		return nil
	}
	return errors.New("ObjectId Not Exist")
}

func Delete(ObjectId string) {
	delete(Objects, ObjectId)
}
`

var apiControllers = `package controllers

import (
	"encoding/json"
	"github.com/astaxie/beego"
	"{{.Appname}}/models"
)

type ResponseInfo struct {
}

type ObejctController struct {
	beego.Controller
}

func (this *ObejctController) Post() {
	var ob models.Object
	json.Unmarshal(this.Ctx.RequestBody, &ob)
	objectid := models.AddOne(ob)
	this.Data["json"] = "{\"ObjectId\":\"" + objectid + "\"}"
	this.ServeJson()
}

func (this *ObejctController) Get() {
	objectId := this.Ctx.Params[":objectId"]
	if objectId != "" {
		ob, err := models.GetOne(objectId)
		if err != nil {
			this.Data["json"] = err
		} else {
			this.Data["json"] = ob
		}
	} else {
		obs := models.GetAll()
		this.Data["json"] = obs
	}
	this.ServeJson()
}

func (this *ObejctController) Put() {
	objectId := this.Ctx.Params[":objectId"]
	var ob models.Object
	json.Unmarshal(this.Ctx.RequestBody, &ob)

	err := models.Update(objectId, ob.Score)
	if err != nil {
		this.Data["json"] = err
	} else {
		this.Data["json"] = "update success!"
	}
	this.ServeJson()
}

func (this *ObejctController) Delete() {
	objectId := this.Ctx.Params[":objectId"]
	models.Delete(objectId)
	this.Data["json"] = "delete success!"
	this.ServeJson()
}
`

func init() {
	cmdApiapp.Run = createapi
}

func createapi(cmd *Command, args []string) {
	if len(args) != 1 {
		fmt.Println("error args")
		os.Exit(2)
	}
	apppath, packpath, err := checkEnv(args[0])
	if err != nil {
		fmt.Println(err)
		os.Exit(2)
	}
	os.MkdirAll(apppath, 0755)
	fmt.Println("create app folder:", apppath)
	os.Mkdir(path.Join(apppath, "conf"), 0755)
	fmt.Println("create conf:", path.Join(apppath, "conf"))
	os.Mkdir(path.Join(apppath, "controllers"), 0755)
	fmt.Println("create controllers:", path.Join(apppath, "controllers"))
	os.Mkdir(path.Join(apppath, "models"), 0755)
	fmt.Println("create models:", path.Join(apppath, "models"))

	fmt.Println("create conf app.conf:", path.Join(apppath, "conf", "app.conf"))
	writetofile(path.Join(apppath, "conf", "app.conf"),
		strings.Replace(apiconf, "{{.Appname}}", args[0], -1))

	fmt.Println("create controllers default.go:", path.Join(apppath, "controllers", "default.go"))
	writetofile(path.Join(apppath, "controllers", "default.go"),
		strings.Replace(apiControllers, "{{.Appname}}", packpath, -1))

	fmt.Println("create models object.go:", path.Join(apppath, "models", "object.go"))
	writetofile(path.Join(apppath, "models", "object.go"), apiModels)

	fmt.Println("create main.go:", path.Join(apppath, "main.go"))
	writetofile(path.Join(apppath, "main.go"),
		strings.Replace(apiMaingo, "{{.Appname}}", packpath, -1))
}

func checkEnv(appname string) (apppath, packpath string, err error) {
	curpath, err := os.Getwd()
	if err != nil {
		return
	}

	gopath := os.Getenv("GOPATH")
	Debugf("gopath:%s", gopath)
	if gopath == "" {
		err = fmt.Errorf("you should set GOPATH in the env")
		return
	}

	appsrcpath := ""
	haspath := false
	wgopath := path.SplitList(gopath)
	for _, wg := range wgopath {
		wg = path.Join(wg, "src")

		if path.HasPrefix(strings.ToLower(curpath), strings.ToLower(wg)) {
			haspath = true
			appsrcpath = wg
			break
		}
	}

	if !haspath {
		err = fmt.Errorf("can't create application outside of GOPATH `%s`\n"+
			"you first should `cd $GOPATH%ssrc` then use create\n", gopath, string(path.Separator))
		return
	}
	apppath = path.Join(curpath, appname)

	if _, e := os.Stat(apppath); os.IsNotExist(e) == false {
		err = fmt.Errorf("path `%s` exists, can not create app without remove it\n", apppath)
		return
	}
	packpath = strings.Join(strings.Split(apppath[len(appsrcpath)+1:], string(path.Separator)), "/")
	return
}