/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";

// Test that the breadcrumbs widget refreshes correctly when there are markup
// mutations, even if the currently selected node is a slotted node in the shadow DOM.

const TEST_URL = `data:text/html;charset=utf-8,
  <test-component>
    <div slot="slot1" id="el1">content</div>
  </test-component>

  <script>
    'use strict';
    customElements.define('test-component', class extends HTMLElement {
      constructor() {
        super();
        let shadowRoot = this.attachShadow({mode: 'open'});
        shadowRoot.innerHTML = '<slot class="slot-class" name="slot1"></slot>';
      }
    });
  </script>`;

add_task(async function() {
  const { inspector } = await openInspectorForURL(TEST_URL);
  const { markup } = inspector;
  const breadcrumbs = inspector.panelDoc.getElementById(
    "inspector-breadcrumbs"
  );

  info("Find and expand the test-component shadow DOM host.");
  const hostFront = await getNodeFront("test-component", inspector);
  const hostContainer = markup.getContainer(hostFront);
  await expandContainer(inspector, hostContainer);

  info("Expand the shadow root");
  const shadowRootContainer = hostContainer.getChildContainers()[0];
  await expandContainer(inspector, shadowRootContainer);

  const slotContainer = shadowRootContainer.getChildContainers()[0];

  info("Select the slot node and wait for the breadcrumbs update");
  const slotNodeFront = slotContainer.node;
  let onBreadcrumbsUpdated = inspector.once("breadcrumbs-updated");
  inspector.selection.setNodeFront(slotNodeFront);
  await onBreadcrumbsUpdated;

  checkBreadcrumbsContent(breadcrumbs, [
    "html",
    "body",
    "test-component",
    "#shadow-root",
    "slot.slot-class",
  ]);

  info("Expand the slot");
  await expandContainer(inspector, slotContainer);

  const slotChildContainers = slotContainer.getChildContainers();
  is(slotChildContainers.length, 1, "Expecting 1 slotted child");

  info("Select the slotted node and wait for the breadcrumbs update");
  const slottedNodeFront = slotChildContainers[0].node;
  onBreadcrumbsUpdated = inspector.once("breadcrumbs-updated");
  inspector.selection.setNodeFront(slottedNodeFront);
  await onBreadcrumbsUpdated;

  checkBreadcrumbsContent(breadcrumbs, [
    "html",
    "body",
    "test-component",
    "div#el1",
  ]);

  info(
    "Update the classname of the real element and wait for the breadcrumbs update"
  );
  onBreadcrumbsUpdated = inspector.once("breadcrumbs-updated");
  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], function() {
    content.document.getElementById("el1").setAttribute("class", "test");
  });
  await onBreadcrumbsUpdated;

  checkBreadcrumbsContent(breadcrumbs, [
    "html",
    "body",
    "test-component",
    "div#el1.test",
  ]);
});

function checkBreadcrumbsContent(breadcrumbs, selectors) {
  info("Check the output of the breadcrumbs widget");
  const container = breadcrumbs.querySelector(".html-arrowscrollbox-inner");
  is(
    container.childNodes.length,
    selectors.length,
    "Correct number of buttons"
  );
  for (let i = 0; i < container.childNodes.length; i++) {
    is(
      container.childNodes[i].textContent,
      selectors[i],
      "Text content for button " + i + " is correct"
    );
  }
}
