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

"use strict";

// Check that when the viewport is resized, the computed-view refreshes.

const TEST_URI =
  "data:text/html;charset=utf-8," +
  `
  <meta name="viewport" content="width=device-width">
  <style>
  div {
    width: 500px;
    height: 10px;
    background: purple;
  }
  @media screen and (max-width: 200px) {
    div {
      width: 100px;
    }
  };
  </style><div></div></html>
`;

addRDMTask(TEST_URI, async function ({ ui, manager }) {
  info("Open the responsive design mode and set its size to 500x500 to start");
  await setViewportSize(ui, manager, 500, 500);

  info("Open the inspector, computed-view and select the test node");
  const { inspector, view } = await openComputedView();
  await selectNode("div", inspector);

  info("Try shrinking the viewport and checking the applied styles");
  await testShrink(view, inspector, ui, manager);

  info("Try growing the viewport and checking the applied styles");
  await testGrow(view, inspector, ui, manager);

  await closeToolbox();
});

async function testShrink(computedView, inspector, ui, manager) {
  is(computedWidth(computedView), "500px", "Should show 500px initially.");

  const onRefresh = inspector.once("computed-view-refreshed");
  await setViewportSize(ui, manager, 100, 100);
  await onRefresh;

  is(computedWidth(computedView), "100px", "Should be 100px after shrinking.");
}

async function testGrow(computedView, inspector, ui, manager) {
  const onRefresh = inspector.once("computed-view-refreshed");
  await setViewportSize(ui, manager, 500, 500);
  await onRefresh;

  is(computedWidth(computedView), "500px", "Should be 500px after growing.");
}

function computedWidth(computedView) {
  for (const prop of computedView.propertyViews) {
    if (prop.name === "width") {
      return prop.valueNode.textContent;
    }
  }
  return null;
}