//switch: sizes

let color = prompt("Введите размер", "");
switch (color){
    case "40": document.write("<div> AmericanSize - 6 </div>");
        break;
    case "42": document.write("<div> AmericanSize - 8 </div>");
                break;
    case "44": document.write("<div> AmericanSize - 10 </div>");
        break;
    case "46": document.write("<div> AmericanSize - 12 </div>");
        break;
    case "48": document.write("<div> AmericanSize - 14 </div>");
        break;
    case "50": document.write("<div> AmericanSize - 16 </div>");
        break;
    case "52": document.write("<div> AmericanSize - 18  </div>");
        break;
    case "54": document.write("<div AmericanSize - 20</div>");
                break;
    default: document.write("<div> Razmer ne ukazan </div>");
}


//switch: if

let color1 = prompt("Введите цвет", "");
if (color1 === "red") {
    document.write("<div style='background-color: red;'>RED</div> <div style='background-color: black; color: white;'>BLACK</div>");
}
else if (color1 === "black") {
    document.write("<div style='background-color: black; color: white;'>BLACK</div>");
}
else if (color1 === "blue") {
    document.write("<div style='background-color: blue; color: pink;'>BLUE</div>");
}
else if (color1 === "green") {
    document.write("<div style='background-color: black; color: red;'>GREEN</div > ");
} else {
    document.write("<div style='background-color: gray;'>Я не понял</div>");
}

//prompt: or

let year = prompt("Какого года вы рождения?")
if (year === "" || year === null) {
    alert("Вы бокопор!")
}
else {
    age = 2022 - year;
    alert(`Вам ${age} лет`);
}

//confirm: or this days
let rob = confirm("Шопинг?") ? alert("GO") : alert("Ты бяка");


//confirm: if this days
let question = confirm("На шопинг ?")   
if (question) {
    alert("GO") 
} else {
    alert("Сиди дома")
}



// triple prompt
let name1 = prompt("Пиши имя");
let surname = prompt("Пиши фамилию");
let middleName = prompt("Пиши отчество")
alert(name1 + " " + surname + " " + middleName);


//default: or

let nameDEF = "Vanek";
let surnameDEF = "Ivanov";
let middleNameDEF = "Ivanovich";

let name2 = prompt("Пиши имя") || nameDEF;
let surname2 = prompt("Пиши фамилию") || surnameDEF ;
let middleName2 = prompt("Пиши отчество") || middleNameDEF;

alert(name2 + " " + surname2 + " " + middleName2);

//default: if  нашаманил шото не знаю как

let nameDEFo = "Vanek";
let surnameDEFo = "Ivanov";
let middleNameDEFo = "Ivanovich";

let name3 = prompt("Пиши имя")
if (name3 === null || name3 === "" ) {
   name3 =  nameDEFo 
} else {
    name3 
}

let surname3 = prompt("Пиши фамилию")
if (surname3 === null || surname3 === "" ) {
   surname3 =  surnameDEFo
} else {
    surname3 
}

let middleName3 = prompt("Пиши фамилию")
if (middleName3 === null || middleName3 === "" ) {
   middleName3 =  surnameDEFo
} else {
    middleName3 
}
alert(name3 + " " + surname3 + " " + middleName3);   


//login and password
let login = prompt("Введите логин")
if (login === "admin") {
    alert(" Congratulations ")
} else {
    alert("Error")
}
let password = prompt("Введите пароль")
if (password === "qwerty") {
    alert(" Congratulations ")
} else {
    alert("Error")
}

//currency calc
let currency = prompt("Enter currency `usd` or `eur`") 
let kurs = ""
switch (currency) {
    case "usd":  kurs = 36.8
        break;
    case "eur": kurs = 37.69
        break;
}
let grn = prompt("Сколько хотите перевести? грн")
let result = kurs / grn
let sum = alert(`Вот вам ${result}`)

//currency calc: improved

let currency1 = prompt("Enter currency `usd` or `eur`") 
let kurs1 = ""
switch (currency1.toLowerCase()) {
    case "usd":  kurs1 = 36.8
        break;
    case "eur": kurs1 = 37.69
        break;
}
let grn1 = prompt("Сколько хотите перевести? грн")
let result1 = kurs1 / grn1
let sum1 = alert(`Вот вам ${result1}`)

//currency calc: two rates ????
//let money = confirm("Usd покупка?") ? 
//let vibor = confirm("Покупка или продажа?")





//currency calc: if

let change = prompt("Покупка или продажа ?")
let change1 = prompt("usd или eur ?")
let kursUsdKup = 40
let kursUsdProd = 36
let kursEurKup = 45
let kursEurProd = 37
let result3 = +prompt("Сколько грн?")
if (change === "покупка" && change1 === "usd") {
    alert(`Купил = ${result3 / kursUsdKup} `)
} else if
    (change === "продажа" && change1 === "usd") {
    alert(`Продал =  ${result3 * kursUsdProd}`) 
}
else if (change === "покупка" && change1 === "eur") {
    alert(`Купил = ${result3 / kursEurKup}`)
} else if (change === "продажа" && change1 === "usd") {
    alert(`Продал =  ${result3 * kursEurProd}`)
} else if (change === "продажа" && change1 === "eur") {
    alert(`Продал =  ${result3 * kursEurProd}`)
}




//scissors
debugger
let myChoise = +prompt("Выберите свой вариант Камень - 1 , Ножницы - 2, Бумага - 3")
let compChoise = Math.ceil(Math.random() * 3)
alert(compChoise)
if (myChoise === 1 && compChoise === 2 || myChoise === 2 && compChoise === 3 || myChoise === 3 && compChoise === 1) {
    alert("You win!!!"); 
} else if (myChoise === 2 && compChoise === 1 || myChoise === 3 && compChoise === 2 || myChoise === 1 && compChoise === 3) {
    alert("You lose!!!")
} else {
    alert("Ничья!!!")
}