main.go

package main

import (
	"fmt"
	"gogon/helper"
	"sync"
	"time"
)

const confTicket int = 50

var name = "Dafrin"

const tiket int = 50

var remainingTickets uint = 50
var bookings = make([]UserData, 0)

type UserData struct {
	firstName       string
	lastname        string
	email           string
	numberOfTickets uint
}

var wg = sync.WaitGroup{}

func main() {

	// refrensi : https://pkg.go.dev/fmt#pkg-overview

	greetUsers()

	// call function getUserInput
	firstName, lastname, email, userTiket := getUserInput()
	// call function validation
	isValidName, isValidEmail, isValidTicketNumber := helper.ValidateUserInput(firstName, lastname, email, userTiket, remainingTickets)

	if isValidName && isValidEmail && isValidTicketNumber {

		// call books ticket
		bookTicket(userTiket, firstName, lastname, email)

		wg.Add(1)
		go sendTicket(userTiket, firstName, lastname, email)

		// call function print first name
		firstNames := getFirstName()
		fmt.Printf("There first names of bookings are: %v\n", firstNames)

		if remainingTickets == 0 {
			// end program
			fmt.Println("Our conference is booked out. Come back next year.")
			// break
		}
	} else {

		if !isValidName {
			fmt.Println("first name or last name you entered is too short")
		}

		if !isValidEmail {
			fmt.Println("email addre you entered doesn't containt @ sign")
		}

		if !isValidTicketNumber {
			fmt.Printf("number of tickets you entered is invalid")
		}
	}

	wg.Wait()

}

func greetUsers() {
	fmt.Printf("Hello World %v\n", name)
	fmt.Printf("Tiket untuk nonton bola: %v dan tiket %v\n", confTicket, remainingTickets)
	fmt.Printf("Get your tickets here to attend")

}

func getFirstName() []string {
	firstNames := []string{}
	for _, booking := range bookings {

		firstNames = append(firstNames, booking.firstName)
	}
	// fmt.Printf("There first names of bookings are: %v\n", firstNames)

	return firstNames
}

// validate

func getUserInput() (string, string, string, uint) {
	var firstName string
	var lastname string
	var email string
	var userTiket uint

	fmt.Printf("Enter your first name: ")
	fmt.Scan(&firstName)

	fmt.Printf("Enter your last name: ")
	fmt.Scan(&lastname)

	fmt.Printf("Enter your email: ")
	fmt.Scan(&email)

	fmt.Printf("Enter number of ticket: ")
	fmt.Scan(&userTiket)

	return firstName, lastname, email, userTiket
}

func bookTicket(userTiket uint, firstName string, lastname string, email string) {
	remainingTickets = remainingTickets - uint(userTiket)

	// create a map for a user

	var userData = UserData{
		firstName:       firstName,
		lastname:        lastname,
		email:           email,
		numberOfTickets: userTiket,
	}
	// userData["firstname"] = firstName
	// userData["lastname"] = lastname
	// userData["email"] = email
	// userData["numberOfTickets"] = strconv.FormatUint(uint64(userTiket), 10)

	bookings = append(bookings, userData)
	fmt.Printf("List of Bookings is %v\n", bookings)

	fmt.Printf("Thank you %v %v for booking %v tickets. You will receive a confirmation eamil at %v\n",
		firstName, lastname, userTiket, email)
	fmt.Printf("%v tickets remaining for %v\n", remainingTickets, name)
}

func sendTicket(userTiket uint, firstName string, lastname string, email string) {
	time.Sleep(10 * time.Second)
	var ticket = fmt.Sprintf("%v tickets for %v %v\n", userTiket, firstName, lastname)
	fmt.Println("###############")
	fmt.Printf("Sending tiket:\n %v \nto email address %v\n", ticket, email)
	fmt.Println("###############")

	wg.Done()
}