package hotime

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

type App struct {
	Router
	Error
	Port            string                     //端口号
	connectListener func(context 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
	CacheIns
	sessionLong  CacheIns
	sessionShort CacheIns
}

//启动实例
func (this *App) Run(router Router) {
	this.Router = router
	//this.Port = port
	this.Port = this.Config.GetString("port")

	if this.connectDbFunc != nil {
		this.Db.SetConnect(this.connectDbFunc)
	}

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

	//http.HandleFunc("/", this.handler)
	run(this)

}

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

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

}

//默认配置缓存和session实现
func (this *App) SetDefault(connect func(err ...*Error) *sql.DB) {
	this.SetConfig()
	this.connectDbFunc = connect
	//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 *App) 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 *App) 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)
		}
	}
	//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.ModeAppend)
	//	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 *App) SetConnectListener(lis func(context Context) bool) {
	this.connectListener = lis
}

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

}

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

	q := strings.Index(req.RequestURI, "?")
	if q == -1 {
		q = len(req.RequestURI)
	}
	o := Substr(req.RequestURI, 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])
		}
	}

	//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 {

			//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((Config["sessionName"]).(string))
			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: Config["sessionName"].(string), Value: sessionId, Path: "/"})
			} else {
				sessionId = cookie.Value
			}

			//访问实例
			context := Context{SessionIns: SessionIns{SessionId: sessionId,
				LongCache:  this.sessionLong,
				ShortCache: this.sessionShort,
			},
				CacheIns: this.CacheIns,
				Resp:     w, Req: req, App: this, RouterString: s, Config: this.Config, Db: &this.Db}

			//访问拦截
			if this.connectListener != nil {
				if !this.connectListener(context) {
					context.View()
					return
				}
			}
			//控制层
			this.Router[s[0]][s[1]][s[2]](&context)
			context.View()
			return
		}

	}

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

	//判断是否为默认
	if path[len(path)-1] == '/' {
		defFile := Config["defFile"].([]string)
		for i := 0; i < len(defFile); i++ {
			temp := path + defFile[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
	}

	header := w.Header()

	//类型判断并设置Content-Type
	if strings.Contains(path, ".css") {
		header.Set("Content-Type", "text/css")
		//header.Get(Config["sessionName"].(string))
	}
	header.Set("Cache-Control", "public")
	//w.Write(data)
	http.ServeFile(w, req, path)

}