@model SushiBarContracts.ViewModels.SushiViewModel

@{
    ViewData["Title"] = "Create";
}
<div class="text-center">
    <h2 class="display-4">Create order</h2>
</div>
<form method="post">
    <div class="row">
        <div class="col-4">Sushi:</div>
        <div class="col-8">
            <select
                id="sushi"
                name="sushi"
                class="form-control"
                asp-items="@ViewBag.Sushi">
            </select>
        </div>
    </div>
    <div class="row">
        <div class="col-4">Count:</div>
        <div class="col-8">
            <input type="text" name="count" id="count"/>
        </div>
    </div>
    <div class="row">
        <div class="col-4">Sum:</div>
        <div class="col-8">
            <input type="text" id="sum" name="sum" readonly/>
        </div>
    </div>
    <div class="row">
        <div class="col-8"></div>
        <div class="col-4">
            <input type="submit" value="Create" class="btn btn-primary"/>
        </div>
    </div>
</form>
<script>
    $('#sushi').on('change', () => {
        check();
    });
    $('#count').on('change', () => {
        check();
    });
    function check() {
        const count = $('#count').val();
        const sushi = $('#sushi').val();
        console.log()
        if (count && sushi) {
            $.ajax({
                method: "POST", 
                url: "/Home/Calc", 
                data: { count, sushi }, 
                success: (result) => { $("#sum").val(result) }
            });
        }
    }
</script>