package hotime

import (
	"bytes"
	"database/sql"
	"encoding/json"
	"fmt"
	"errors"
	"io/ioutil"
	"net/http"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"net/url"
)

type Application struct {
	MethodRouter
	Router
	contextBase
	Port            string                     //端口号
	connectListener []func(this *Context) bool //所有的访问监听,true按原计划继续使用，false表示有监听器处理
	connectDbFunc   func(err ...*Error) *sql.DB
	configPath      string
	Config          Map
	Db              HoTimeDB
	Server          *http.Server
	CacheIns
	sessionLong  CacheIns
	sessionShort CacheIns
	http.Handler
}

func (this *Application) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	this.handler(w, req)
}

//启动实例
func (this *Application) Run(router Router) {




	this.Router = router
	//重新设置MethodRouter//直达路由
	this.MethodRouter=MethodRouter{}

	if router!=nil{
		for pk,pv:= range router{
			if pv!=nil{
				for ck,cv:=range pv{
						if cv!=nil{
							for mk,mv:=range cv{
								this.MethodRouter["/"+pk+"/"+ck+"/"+mk]=mv
							}
						}
				}
			}
		}
	}


	//this.Port = port
	this.Port = this.Config.GetString("port")

	if this.connectDbFunc != nil && (this.Db.DB==nil||this.Db.DB.Ping() != nil) {
		this.Db.SetConnect(this.connectDbFunc)
	}

	if this.CacheIns == nil {
		this.CacheIns = CacheIns(&CacheMemory{Map: Map{}, Time: this.Config.GetInt64("cacheShortTime")})
	}

	//异常处理
	defer func() {
		if err := recover(); err != nil {
			this.SetError(errors.New(fmt.Sprint(err)), LOG_FMT)
			//fmt.Println(err)
			this.Run(router)
		}
	}()

	this.Server = &http.Server{}
	if !IsRun {
		IsRun = true
	}
	App[this.Port] = this
	this.Server.Handler = this
	//启动服务
	this.Server.Addr = ":" + this.Port
	this.Server.ListenAndServe()

}

//启动实例
func (this *Application) SetConnectDB(connect func(err ...*Error) *sql.DB) {
	this.connectDbFunc = connect
	this.Db.SetConnect(this.connectDbFunc)
}

//设置配置文件路径全路径或者相对路径
func (this *Application) SetSession(short CacheIns, Long CacheIns) {
	this.sessionLong = Long
	this.sessionShort = short

}

//默认配置缓存和session实现
func (this *Application) SetDefault(connect func(err ...*Error) *sql.DB) {
	this.SetConfig()
	this.connectDbFunc = connect
	if this.connectDbFunc != nil {
		this.Db.SetConnect(this.connectDbFunc)
	}

	//防止手动设置缓存误伤
	if this.CacheIns == nil {
		this.SetCache(CacheIns(&CacheMemory{}))
	}
	//防止手动设置session误伤
	if this.sessionShort == nil && this.sessionLong == nil {
		if this.connectDbFunc == nil {
			this.SetSession(CacheIns(&CacheMemory{}), nil)
		} else {
			this.SetSession(CacheIns(&CacheMemory{}), CacheIns(&CacheDb{Db: &this.Db, Time: this.Config.GetInt64("cacheLongTime")}))
		}

	}

}

//设置配置文件路径全路径或者相对路径
func (this *Application) SetCache(cache CacheIns) {

	this.CacheIns = cache

}

//设置配置文件路径全路径或者相对路径
func (this *Application) SetConfig(configPath ...string) {
	if len(configPath) != 0 {
		this.configPath = configPath[0]
	}

	if this.configPath == "" {
		this.configPath = "config/config.json"
	}
	//加载配置文件
	btes, err := ioutil.ReadFile(this.configPath)
	this.Config = DeepCopyMap(Config).(Map)
	if err == nil {

		cmap := Map{}
		//文件是否损坏
		cmap.JsonToMap(string(btes), &this.Error)

		for k, v := range cmap {
			this.Config.Put(k, v)//程序配置
			Config.Put(k,v)//系统配置
		}
	}
	//else {
	//	//文件不存在则写入文件，存在不做处理
	//	var out bytes.Buffer
	//	err = json.Indent(&out, []byte(this.Config.ToJsonString()), "", "\t")
	//	os.MkdirAll(filepath.Dir(this.configPath), os.ModeDir)
	//	os.Create(this.configPath)
	//	err = ioutil.WriteFile(this.configPath, out.Bytes(), os.ModeApplicationend)
	//	if err != nil {
	//		this.Error.SetError(err)
	//	}
	//}
	//文件如果损坏则不写入配置防止配置文件数据丢失
	if this.Error.GetError() == nil {
		var out bytes.Buffer

		err = json.Indent(&out, []byte(this.Config.ToJsonString()), "", "\t")

		err = ioutil.WriteFile(this.configPath, out.Bytes(), os.ModeAppend)

		if err != nil {
			os.MkdirAll(filepath.Dir(this.configPath), os.ModeDir)
			os.Create(this.configPath)
			err = ioutil.WriteFile(this.configPath, out.Bytes(), os.ModeAppend)

			if err != nil {
				this.Error.SetError(err)
			}
		}

	} else {
		this.Error.SetError(nil)
	}

}

//连接判断,返回true继续传输至控制层，false则停止传输
func (this *Application) SetConnectListener(lis func(this *Context) bool) {
	this.connectListener = append(this.connectListener, lis)
}

//网络错误
//func (this *Application) session(w http.ResponseWriter, req *http.Request) {
//
//}

//序列化链接
func (this *Application) urlSer(url string) (string, []string) {
	q := strings.Index(url, "?")
	if q == -1 {
		q = len(url)
	}
	o := Substr(url, 0, q)

	r := strings.SplitN(o, "/", -1)

	var s = make([]string, 0)

	for i := 0; i < len(r); i++ {
		if !strings.EqualFold("", r[i]) {
			s = append(s, r[i])
		}
	}
	return o, s
}

//访问
func (this *Application) handler(w http.ResponseWriter, req *http.Request) {

	o, s := this.urlSer(req.RequestURI)
	//获取cookie
	// 如果cookie存在直接将sessionId赋值为cookie.Value
	// 如果cookie不存在就查找传入的参数中是否有token
	// 如果token不存在就生成随机的sessionId
	// 如果token存在就判断token是否在Session中有保存
	// 如果有取出token并复制给cookie
	// 没有保存就生成随机的session
	cookie, err := req.Cookie(this.Config.GetString("sessionName"))
	sessionId := Md5(strconv.Itoa(Rand(10)))
	token := req.FormValue("token")
	//isFirst:=false
	if err != nil || (len(token) == 32 && cookie.Value != token) {
		if len(token) == 32 {
			sessionId = token
		}
		//else{
		//	isFirst=true;
		//}
		http.SetCookie(w, &http.Cookie{Name: this.Config.GetString("sessionName"), Value: sessionId, Path: "/"})
	} else {
		sessionId = cookie.Value
	}

	unescapeUrl,err:=url.QueryUnescape(req.RequestURI)
	if err!=nil{
		unescapeUrl=req.RequestURI
	}
	//访问实例
	context := Context{SessionIns: SessionIns{SessionId: sessionId,
		LongCache:  this.sessionLong,
		ShortCache: this.sessionShort,
	},
		CacheIns: this.CacheIns,
		Resp:     w, Req: req, Application: this, RouterString: s, Config: this.Config, Db: &this.Db, HandlerStr: unescapeUrl}
	//header默认设置
	header := w.Header()
	header.Set("Content-Type", "text/html; charset=utf-8")

	//url去掉参数并序列化
	context.HandlerStr, context.RouterString = this.urlSer(context.HandlerStr)


	//访问拦截true继续false暂停
	connectListenerLen := len(this.connectListener)
	if connectListenerLen != 0 {
		for i := 0; i < connectListenerLen; i++ {

			if !this.connectListener[i](&context) {

				context.View()
				return
			}
		}
	}

	//接口服务
	//if len(s) == 3 {
	//	//如果满足规则则路由到对应控制器去
	//	if this.Router[s[0]] != nil && this.Router[s[0]][s[1]] != nil && this.Router[s[0]][s[1]][s[2]] != nil {
	//		//控制层
	//		this.Router[s[0]][s[1]][s[2]](&context)
	//		//header.Set("Content-Type", "text/html; charset=utf-8")
	//		context.View()
	//		return
	//	}
	//
	//}

	if this.MethodRouter[context.HandlerStr]!=nil{
				this.MethodRouter[context.HandlerStr](&context)
				context.View()
				return
	}

	//url赋值
	path := this.Config.GetString("tpt") + o

	//判断是否为默认
	if path[len(path)-1] == '/' {
		defFile := this.Config.GetSlice("defFile")

		for i := 0; i < len(defFile); i++ {
			temp := path + defFile.GetString(i)
			_, err := os.Stat(temp)

			if err == nil {
				path = temp
				break
			}
		}
		if path[len(path)-1] == '/' {
			w.WriteHeader(404)
			return
		}
	}

	if strings.Contains(path, "/.") {
		w.WriteHeader(404)
		return
	}

	//设置header
	delete(header,"Content-Type")
	if this.Config.GetInt("debug")!=1{
		header.Set("Cache-Control", "public")
	}

	//w.Write(data)
	http.ServeFile(w, req, path)

}