<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<script src="../../resources/accessibility-helper.js"></script>
<script src="../../resources/js-test.js"></script>
</head>
<style>
.hidden { display: none; }
</style>
<body>

<div id="bg">
    <p id="bgContent">Other page content with <a href="#">a dummy focusable element</a></p>
    <p>
        <a onclick="toggleDialog(document.getElementById('dialog1'), 'show'); document.getElementById('new').focus(); return false;"
           href="#" role="button" id="displayBtn">
            Display a dialog
        </a>
    </p>
</div>

<div role="dialog" aria-labelledby="dialog1-heading" id="dialog1" class="hidden" tabindex="-1" aria-modal="false">
    <h3 id="dialog1-heading">Dialog1 heading</h3>
    <button id="ok" onclick="toggleDialog(document.getElementById('dialog1'), 'hide');" class="close-button">OK</button>
    <button onclick="toggleDialog(document.getElementById('dialog2'), 'show');" id="new">New</button>
</div>

<div role="dialog" aria-labelledby="dialog2-heading" id="dialog2" class="hidden" tabindex="-1">
    <h3 id="dialog2-heading">Dialog2 heading</h3>
    <button id="close" onclick="toggleDialog(document.getElementById('dialog2'), 'hide');" class="close-button">Close</button>
</div>

<script>
    var testOutput = "This tests that focus will automatically move to aria-modal dialogs\n\n";

    if (window.accessibilityController) {
        window.jsTestIsAsync = true;

        if (backgroundAccessible())
            testOutput += `PASS: Background is initially accessible.\n`;
        else
            testOutput += `FAIL: Background is not initially accessible.\n`;

        var newBtn, okBtn, closeBtn;
        // 1. Click the display button, dialog1 shows and focus shouldn't move since we have
        // javascript code to focus on the "new" button.
        testOutput += "\nOpening dialog1.\n";
        document.getElementById("displayBtn").click();
        setTimeout(async () => {
            await waitFor(() => {
                newBtn = accessibilityController.accessibleElementById("new");
                return newBtn && newBtn.isFocused;
            });
            testOutput += "PASS: #new button is focused.\n";

            // 2. Click the new button, dialog2 shows and focus should move to the close button.
            // Set aria-modal to false on the previous modal object (we shouldn't have two modals in play).
            testOutput += "\nOpening dialog2.\n";
            document.getElementById("new").click();
            document.getElementById("dialog1").ariaModal = false;

            await waitFor(() => {
                closeBtn = accessibilityController.accessibleElementById("close");
                return closeBtn && closeBtn.isFocused;
            });
            testOutput += "PASS: #close button is focused.\n";

            // 3. Click the close button, dialog2 closes and focus should go back to the
            // first focusable child of dialog1, which we now need to add aria-modal back to.
            testOutput += "\nClosing dialog2 and making dialog1 `ariaModal = true`.\n";
            document.getElementById("close").click();
            document.getElementById("dialog1").ariaModal = true;

            await waitFor(() => {
                okBtn = accessibilityController.accessibleElementById("ok");
                return okBtn && okBtn.isFocused;
            });
            testOutput += "PASS: #ok button is focused.\n";

            debug(testOutput);
            finishJSTest();
        });
    }
    
    function backgroundAccessible() {
        const displayBtn = accessibilityController.accessibleElementById("displayBtn");
        const bgContent = accessibilityController.accessibleElementById("bgContent");
        if (!displayBtn || !bgContent)
            return false;
        
        return !displayBtn.isIgnored && !bgContent.isIgnored;
    }
    
    function toggleDialog(dialog, sh) {
        if (sh == "show") {
            dialog.style.display = "block";
            dialog.setAttribute("aria-modal", "true");
        } else {
            dialog.style.display = "none";
            dialog.setAttribute("aria-modal", "false"); 
        }
    }
</script>
</body>
</html>