package main

import (
	"database/sql"
	"fmt"

	_ "github.com/go-sql-driver/mysql"
)

func connectMysql() (*sql.DB, error) {
	db, err := sql.Open("mysql", "root:password@tcp(127.0.0.1:3306)/golang_user")

	if err != nil {
		panic(err.Error())
	}
	return db, nil
}

func addUser(_login string, _password string, _userDescription string, _points int) {
	//do rejestracji uzytkownika
	// Insert do bazy Mysql Nowego użytkownika

	db, err := connectMysql()

	if err != nil {
		panic(err.Error())
	}

	queryInsert := fmt.Sprintf(`INSERT INTO users (
			login,
			password,
			userDescription,
			points
		)VALUES (
			"%s",
			"%s",
			"%s",
			"%d"
		)`, _login, _password, _userDescription, _points)

	fmt.Printf(queryInsert)
	insert, err := db.Query(queryInsert)
	if err != nil {
		panic(err.Error())
	}
	fmt.Println(insert)

}

func getAllUsers() []User {
	//pobiera wszystkich uzytkownikow - do wysiwetlenie na front
	/* --------------------- users -----------------------
	userId          int    `json:"id"` // do pobierania z GET
	login           string `json:"login"`
	password        string `json:"password"`
	userDescription string `json:"userDescription"`
	points          int    `json:points`
	*/
	allUsers := []User{}
	db, err := connectMysql()

	result, err := db.Query("SELECT * FROM users")
	if err != nil {
		panic(err.Error())
	}

	for result.Next() {
		var user User

		err = result.Scan(&user.UserId, &user.Login, &user.Password, &user.UserDescription, &user.Points)
		if err != nil {
			panic(err.Error())
		}

		fmt.Println(user)
		allUsers = append(allUsers, user)
	}

	// fmt.Println("All users: ", allUsers)
	// fmt.Println(reflect.TypeOf(allUsers))

	return allUsers
}

func checkLoginExists(_login string) bool {
	//sprawdza czy dany login jest juz w bazie, przy rejestracji przydatne
	db, err := connectMysql()

	querySelect := fmt.Sprintf(`SELECT login FROM users WHERE login='%s' ;`, _login)

	result, err := db.Query(querySelect)
	if err != nil {
		panic(err.Error())
	}

	for result.Next() {
		var userLogin string

		err = result.Scan(&userLogin)
		if err != nil {
			panic(err.Error())
		}

		if userLogin != "" {
			return true
		}
	}

	return false
}

func loginUser(_login string, _password string) bool {
	//do logowanie w bazie
	db, err := connectMysql()
	querySelect := fmt.Sprintf(`SELECT login FROM users WHERE login='%s' AND password='%s' ;`, _login, _password)

	result, err := db.Query(querySelect)
	if err != nil {
		panic(err.Error())
	}

	for result.Next() {
		var userLogin string

		err = result.Scan(&userLogin)
		if err != nil {
			panic(err.Error())
		}

		if userLogin != "" {
			return true
		}
	}

	return false
}