package main

import (
	"database/sql"
	"fmt"
	"html/template"
	"log"
	"net/http"

	//"net/url"

	//"time"

	_ "github.com/mattn/go-sqlite3"
)

var IDusers int
var User string
var Password string
var PIN int
var RFID int
var Login string

//***************************************************************************
//funkcje sterujące
//***************************************************************************
//#############################################################################
func opisStołówkaZPM(w http.ResponseWriter, r *http.Request) {
	t, _ := template.ParseFiles("StronaGlowna.gtpl")
	t.Execute(w, nil)
}

//#############################################################################
func panel(w http.ResponseWriter, r *http.Request) {
	//Here:
	//time.Sleep(3 * time.Second)

	fmt.Println("method:", r.Method)
	if r.Method == "GET" {
		t, _ := template.ParseFiles("panel.gtpl")
		d := struct {
			UserView string
		}{
			UserView: User}
		t.ExecuteTemplate(w, "panel.gtpl", d)
	}
}

/*----------------------------------
	db, err := sql.Open("sqlite3", "stolowkaZPM.db")
	checkErr(err)
	// query
	rows, err := db.Query("SELECT * FROM users")
	checkErr(err)
	//fmt.Fprintf(w, "Lista użytkowników:\n")
	for rows.Next() {
		err = rows.Scan(&IDusers, &User, &Password, &PIN, &RFID, &Login)
		checkErr(err)
		//fmt.Printf("%d.  %s, %s, %d, %d, %s \n", IDusers, User, Password, PIN, RFID, Login)
		//fmt.Fprintf(w, "%d. %s \n", IDusers, User)
		if r.Method == "POST" {
			if Login == loginFROMsite {
				if Password == passwordFROMsite {

				}
			}
		}
	}
	rows.Close()
	db.Close()
//----------------------------------
*/

//#############################################################################
func login(w http.ResponseWriter, r *http.Request) {
	fmt.Println("method:", r.Method)
	if r.Method == "GET" {
		t, _ := template.ParseFiles("login.gtpl")
		t.Execute(w, nil)
	} else {
		r.ParseForm()
		//fmt.Println("usernameFROMsite: ", r.Form["usernameFROMsite"])
		//fmt.Println("passwordFROMsite: ", r.Form["passwordFROMsite"])
		//if len(r.Form["usernameFROMsite"][0]) == 0 {
		//	goto Here
		//}
		//if len(r.Form["passwordFROMsite"][0]) == 0 {
		//	goto Here
		//}
	}
	loginFROMsite := r.FormValue("loginFROMsite")
	passwordFROMsite := r.FormValue("passwordFROMsite")
	//zaloguj := "Zalogowano!"

	//**************************************************************************
	db, err := sql.Open("sqlite3", "stolowkaZPM.db")
	checkErr(err)
	// query
	rows, err := db.Query("SELECT * FROM users")
	checkErr(err)

	for rows.Next() {
		err = rows.Scan(&IDusers, &User, &Password, &PIN, &RFID, &Login)
		checkErr(err)
		//fmt.Printf("%d.  %s, %s, %d, %d, %s \n", IDusers, User, Password, PIN, RFID, Login)
		//fmt.Fprint(w, IDusers)
		//fmt.Fprint(w, ".  ")
		//fmt.Fprint(w, User)
		//fmt.Fprint(w, " \n")
		if r.Method == "POST" {
			if Login == loginFROMsite {
				if Password == passwordFROMsite {
					//fmt.Fprintln(w, zaloguj)
					//fmt.Fprintln(w, usernameFROMsite)
					//time.Sleep(3 * time.Second)
					//if zaloguj == "Zalogowano!"
					http.Redirect(w, r, "http://localhost:9197/panel", http.StatusSeeOther)
					panel(w, r)
					break
				}
			}
		}
	}
	if r.Method == "POST" {
		if loginFROMsite != Login {
			t, _ := template.ParseFiles("login.gtpl")
			t.Execute(w, nil)
			fmt.Fprint(w, "***  UWAGA!  ***  Błąd logowania! Login lub hasło nieprawidłowe.  ***  Spróbuj ponownie.  ***")
		}
	}
	rows.Close()
	db.Close()
	//**************************************************************************
}

//***************************************************************************
//Bazy danych SQlite
//***************************************************************************

func checkErr(err error) {
	if err != nil {
		fmt.Println("Błąd")
	}
}

//***************************************************************************
//funkcja główna
//***************************************************************************
func main() {
	http.HandleFunc("/", opisStołówkaZPM)
	http.HandleFunc("/login", login)
	http.HandleFunc("/panel", panel)

	err := http.ListenAndServe(":9197", nil)
	if err != nil {
		log.Fatal("ListenAndServe: ", err)
	}
}