{{ block title }}
Section 1: example
{{ endblock }}


{{ block content }}

<div class="instructions well well-lg" style="">
    <p>
        The following is an example of the type choices you may be asked to make in section 1.
        <br> <br>

        If this task is the one that has been selected for payment, you will be given {{Constants.x0_example}} pieces of chocolate
        and {{Constants.y0_example}} dollars.

        <br> <br> In addition, you are offered to choose one of the two extra payments.
        <ul>
            <li> In option A, you can get extra {{Constants.extra_money_example}} dollars. </li>
            <li> Option B contains some extra chocolates as shown in each row in the table below. </li>
        </ul>
        <br> Option A are preselected in all the rows. You can change to option B in any rows as you want.

        <br><br>One of the row has been selected randomly by computer. If this task is the one that has been selected for payment, your payment will be {{Constants.x0_example}} pieces of chocolate
        and {{Constants.y0_example}} dollars plus the extra payment option you choose in the row.
        Since you do not know which row will be selected for extra payment, you should choose for each row as if it were the one row chosen for extra payment.

        <br><br>To make your choices, simply click on your choice for each row. Note that the quantity of chocolates is ascending in the rows.
        So if you pick option A in row 3, you should also pick option A in row 1 and row 2. And if you pick option B in row 7, you should still pick it in row 8, row 9, and row 10.
        The interface below is implemented to automatically make these selections for you.

        <br><br>
        Please note that the chocolate flavor in the graph below are just example. You can choose different flavors as your want in the payment stage.
        <br>

        <img src="{{ static 'incomplete_preference/ExampleMPL.png' }}" style="width: 750px" align="middle"/>

    </p>

</div>

<input type="hidden" name="ExampleMPL" id="ExampleMPL">
{{ formfield_errors "ExampleMPL" }}
<form method="post" id="form">
<table class="table table-striped">
    <colgroup>
        <col width="4%">
        <col width="42%">
        <col width="14%">
        <col width="42%">
    </colgroup>
    <tr>
        <td align = "middle"><b>Row Number</b> </td>
        <td align="right"><b>Choose Option A</b></td>
        <td></td>
        <td align="left"><b>Choose Option B</b></td>
    </tr>
    {{ for m in list_c }}
        <tr>
        <td align = "middle"> {{ m }} </td>
        <td align="right">
           Option A: extra {{Constants.extra_money_example}} dollars
        <td align="middle">
            <input type="radio"
                   value="left"
                   name="egx_1_{{ m }}"
                   checked
                   required >
            <input type="radio"
                   name="egx_1_{{ m }}"
                   value="right"
                   data-amount="{{ m }}"
                   required>
        </td>
        <td align="left">
            Option B: extra {{m}} pieces of chocolate
    </tr>
    {{ endfor }}
</table>

<p>
    The random selected row will be revealed to you in the next page.
</p>

<button type="button" class="btn btn-primary" onClick="submitForm();">Next</button>
</form>


{{ endblock }}

{{ block scripts }}

<script>

    let allRadios = document.querySelectorAll('input[type=radio]')
     let len_list_c = parseFloat('{{ len_list_c }}')
    function submitForm() {
        if (document.getElementById('ExampleMPL') !== null) {
            let form = document.getElementById('form');
            let checkedRadios = document.querySelectorAll('input[type=radio]:checked');
            if (checkedRadios.length === len_list_c ) {
                if (form.reportValidity()) {
                    let choices = document.getElementById('ExampleMPL');
                    let choices_tmp = "";
                    let allChoicesAreOnLeft = true;
                    for (let radio of allRadios) {
                        if (radio.value === 'right' && radio.checked) {
                            choices_tmp = choices_tmp + "R";
                            allChoicesAreOnLeft = false;
                        }
                        if (radio.value === 'left' && radio.checked) {
                            choices_tmp = choices_tmp + "L";
                        }
                    }
                    choices.value = choices_tmp;
                    form.submit();
                }
            }
            if (checkedRadios.length < len_list_c ) {
                alert('Please complete all rows')
            }
        }
    }



    function onRadioClick(evt) {
        let clickedRadio = evt.target;
        let afterClickedRadio = false;
        let clickedRightRadio = clickedRadio.value === 'right';
        let clickedLeftRadio = clickedRadio.value === 'left';

        if(clickedRadio.value === 'right'){
        for (let aRadio of allRadios) {
            if (aRadio === clickedRadio) {
                afterClickedRadio = true;
            }
            if (clickedRightRadio && !afterClickedRadio && aRadio.value === 'left') {
                aRadio.checked = true;
            }
            if (clickedRightRadio && afterClickedRadio && aRadio.value === 'right') {
                aRadio.checked = true;
            }
        }
        }
        if(clickedRadio.value === 'left'){
        for (let aRadio of allRadios) {
            if (aRadio === clickedRadio) {
                afterClickedRadio = true;
                continue;
            }
            if (!afterClickedRadio &&  aRadio.value === 'left') {
                aRadio.checked = true;
            }
            if (afterClickedRadio && aRadio.value === 'right') {
                aRadio.checked = true;
            }
           }
         for (let aRadio of allRadios) {
            if (aRadio === clickedRadio && aRadio.value === 'left') {
              aRadio.checked = true;
            }
           }
        }
    }


    document.addEventListener("DOMContentLoaded", function (event) {
        for (let radio of document.querySelectorAll('input[type=radio]')) {
            radio.onchange = onRadioClick;
        }
    });

</script>

{{ endblock }}