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

"use strict";

// Tests the Filter Editor Widget's drag-drop re-ordering

const {CSSFilterEditorWidget} = require("devtools/client/shared/widgets/FilterWidget");
const {getClientCssProperties} = require("devtools/shared/fronts/css-properties");
const LIST_ITEM_HEIGHT = 32;

const TEST_URI = `data:text/html,<div id="filter-container" />`;

add_task(function* () {
  let [,, doc] = yield createHost("bottom", TEST_URI);
  const cssIsValid = getClientCssProperties().getValidityChecker(doc);

  const container = doc.querySelector("#filter-container");
  const initialValue = "blur(2px) contrast(200%) brightness(200%)";
  let widget = new CSSFilterEditorWidget(container, initialValue, cssIsValid);

  const filters = widget.el.querySelector("#filters");
  function first() {
    return filters.children[0];
  }
  function mid() {
    return filters.children[1];
  }
  function last() {
    return filters.children[2];
  }

  info("Test re-ordering neighbour filters");
  widget._mouseDown({
    target: first().querySelector("i"),
    pageY: 0
  });
  widget._mouseMove({ pageY: LIST_ITEM_HEIGHT });

  // Element re-ordering should be instant
  is(mid().querySelector("label").textContent, "blur",
     "Should reorder elements correctly");

  widget._mouseUp();

  is(widget.getCssValue(), "contrast(200%) blur(2px) brightness(200%)",
     "Should reorder filters objects correctly");

  info("Test re-ordering first and last filters");
  widget._mouseDown({
    target: first().querySelector("i"),
    pageY: 0
  });
  widget._mouseMove({ pageY: LIST_ITEM_HEIGHT * 2 });

  // Element re-ordering should be instant
  is(last().querySelector("label").textContent, "contrast",
     "Should reorder elements correctly");
  widget._mouseUp();

  is(widget.getCssValue(), "brightness(200%) blur(2px) contrast(200%)",
     "Should reorder filters objects correctly");

  info("Test dragging first element out of list");
  const boundaries = filters.getBoundingClientRect();

  widget._mouseDown({
    target: first().querySelector("i"),
    pageY: 0
  });
  widget._mouseMove({ pageY: -LIST_ITEM_HEIGHT * 5 });
  ok(first().getBoundingClientRect().top >= boundaries.top,
     "First filter should not move outside filter list");

  widget._mouseUp();

  info("Test dragging last element out of list");
  widget._mouseDown({
    target: last().querySelector("i"),
    pageY: 0
  });
  widget._mouseMove({ pageY: -LIST_ITEM_HEIGHT * 5 });
  ok(last().getBoundingClientRect().bottom <= boundaries.bottom,
     "Last filter should not move outside filter list");

  widget._mouseUp();
});