package main 

import (
	"log"
	
	"os"
	"time"
	"fmt"
	"net/http"
	"html/template"
	"github.com/gorilla/mux"
	"github.com/gorilla/sessions"


)

type Page struct {
    Title string
    Body  []byte
}

var (
	logger	*log.Logger
	dBConnector connection
	sessionsStore = sessions.NewCookieStore([]byte("mysecretcookie"))
	indexTemplate = template.Must(template.ParseFiles("ui\\templates\\index.html"))
	logInTemplate = template.Must(template.ParseFiles("ui\\templates\\login.html"))
	signInTemplate = template.Must(template.ParseFiles("ui\\templates\\signin.html"))
	gameTemplate = template.Must(template.ParseFiles("ui\\templates\\game.html"))
)

func indexHandler(w http.ResponseWriter, r *http.Request) {
	data := struct {
		User string
		Title string
		Items []string
	}{
		User: "",
		Title: "My page",
		Items: []string{
			"My photos",
			"My blog",
			"More",
		},
	}
	

	session, _ := sessionsStore.Get(r, "session")

	var (
		password string
		ok3 bool
	)

	untyped, ok := session.Values["username"]
	if ok {
		username, ok1 := untyped.(string)
		if ok1 {
			data.User = username
			untyped, ok2 := session.Values["password"]
			if ok2 {
				password, ok3 = untyped.(string)
				
			} 
		}
	} 
	

	indexTemplate.Execute(w, data)

	if ok3 {
		w.Write([]byte(password))
	}

}

func indexPostHandler(w http.ResponseWriter, r *http.Request) {
	fmt.Print("POST")
}

func logInGetHandler(w http.ResponseWriter, r *http.Request) {
	data := struct {
		Username string
		Password string
		Error string
	}{
		Username: "",
		Password: "",
		Error: "",
	}
	logInTemplate.Execute(w, data)
}

func logInPostHandler(w http.ResponseWriter, r *http.Request) {
	r.ParseForm()
	username := r.PostForm.Get("username")
	password := r.PostForm.Get("password")

	if (dBConnector.LogIn(username, password)){

		session, _ := sessionsStore.Get(r, "session")
		session.Values["username"] = username
		session.Values["password"] = password

		session.Save(r,w)
		fmt.Printf("%s\n%s\n",username,password)
		http.Redirect(w, r, "/", http.StatusFound)
	} else {
		data := struct {
			Username string
			Password string
			Error string
		}{
			Username: username,
			Password: password,
			Error: "Неверный логин либо пароль",
		}
		fmt.Printf("Login error")
		logInTemplate.Execute(w, data)
		//w.Write([]byte("Login error"))
	}
}

func logOutGetHandler(w http.ResponseWriter, r *http.Request) {
	session, _ := sessionsStore.Get(r, "session")
	session.Options.MaxAge = -1
	session.Save(r, w)
	
	untyped, ok := session.Values["username"]
	if ok {
		username, ok1 := untyped.(string)
		if ok1 {
			logger.Printf("User %s loged out", username)
		}
	}

	http.Redirect(w, r, "/", http.StatusFound)
}

func signInGetHandler(w http.ResponseWriter, r *http.Request) {
	signInTemplate.Execute(w, nil)
}

func signInPostHandler(w http.ResponseWriter, r *http.Request) {
	r.ParseForm()
	username := r.PostForm.Get("username")
	password := r.PostForm.Get("password")
	passwordRepeat := r.PostForm.Get("password-repeat")

	data := struct {
		Username string
		Password string
		PasswordRepeat string
		Error string
	}{
		Username: username,
		Password: password,
		PasswordRepeat: passwordRepeat,
		Error: "",
	}

	if dBConnector.IsNameUsed(username) {
		data.Error = "Имя пользователя занято"
	} else {
		if (password != passwordRepeat) {
			data.Error = "Введенные пароли не совпадают"
		} else {
			if dBConnector.SigInUser(username,password) {
				
				session, _ := sessionsStore.Get(r, "session")
				session.Values["username"] = username
				session.Values["password"] = password
				session.Save(r,w)

				http.Redirect(w, r, "/", http.StatusFound)
			} else {
				data.Error = "Произошла внутреняя ошибка при регистрации нового пользователя"
			}
		}
	}
	signInTemplate.Execute(w, data)
}

func gameGetHandler(w http.ResponseWriter, r *http.Request) {
	gameTemplate.Execute(w, nil)
}

func gamePostHandler(w http.ResponseWriter, r *http.Request){ //TODO запись score в таблицу
	if err := r.ParseForm(); err != nil {
		fmt.Fprintf(w, "ParseForm() err: %v", err)
		return
	}
	fmt.Printf("Post from website! r.PostFrom = %v\n", r.PostForm)
	score := r.FormValue("score")
	fmt.Fprintf(w,"score = %s\n", score)
	fmt.Printf("score = %s\n", score)
}

func createLogger() {
	startTime := time.Now()
	logFileName := "logs/go-site_log_" + startTime.Format("2006-01-02_15-04-05") + ".txt"
	file, err := os.OpenFile(logFileName, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
	logger = log.New(file, "logger: ", log.Lshortfile)
  	
  	if err != nil {
        	log.Fatal(err)
    	}

}

type user struct{
    idusers int
    username string
    password string
}


func main() {
	
	

	createLogger()

	logger.Print("Hello, log file!")

	requestRouter := mux.NewRouter()

	
    dBConnector.Init("config.json")
    

    requestRouter.HandleFunc("/", indexHandler).Methods("GET")
    //requestRouter.HandleFunc("/", indexPostHandler).Methods("POST")		//Есть ли нужда в обработке POST для /
    requestRouter.HandleFunc("/login/", logInGetHandler).Methods("GET")
    requestRouter.HandleFunc("/login/", logInPostHandler).Methods("POST")
    requestRouter.HandleFunc("/logout/", logOutGetHandler).Methods("GET")
    requestRouter.HandleFunc("/signin/", signInGetHandler).Methods("GET")
    requestRouter.HandleFunc("/signin/", signInPostHandler).Methods("POST")
    requestRouter.HandleFunc("/game/", gameGetHandler).Methods("GET")
    requestRouter.HandleFunc("/", gamePostHandler).Methods("POST")
    http.Handle("/", requestRouter)
    logger.Fatal(http.ListenAndServe(":8080", nil))
}