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

// Tests that the tree widget api works fine
"use strict";

const TEST_URI =
  "data:text/html;charset=utf-8,<head>" +
  "<link rel='stylesheet' type='text/css' href='chrome://devtools/skin/widg" +
  "ets.css'></head><body><div></div><span></span></body>";
const {
  TreeWidget,
} = require("resource://devtools/client/shared/widgets/TreeWidget.js");

add_task(async function () {
  await SpecialPowers.pushPrefEnv({
    set: [["security.allow_unsafe_parent_loads", true]],
  });
  await addTab("about:blank");
  const { host, doc } = await createHost("bottom", TEST_URI);

  const tree = new TreeWidget(doc.querySelector("div"), {
    defaultType: "store",
  });

  populateTree(tree, doc);
  testTreeItemInsertedCorrectly(tree, doc);
  testAPI(tree, doc);
  populateUnsortedTree(tree, doc);
  testUnsortedTreeItemInsertedCorrectly(tree, doc);

  tree.destroy();
  host.destroy();
  gBrowser.removeCurrentTab();
});

function populateTree(tree) {
  tree.add([
    {
      id: "level1",
      label: "Level 1",
    },
    {
      id: "level2-1",
      label: "Level 2",
    },
    {
      id: "level3-1",
      label: "Level 3 - Child 1",
      type: "dir",
    },
  ]);
  tree.add([
    "level1",
    "level2-1",
    {
      id: "level3-2",
      label: "Level 3 - Child 2",
    },
  ]);
  tree.add([
    "level1",
    "level2-1",
    {
      id: "level3-3",
      label: "Level 3 - Child 3",
    },
  ]);
  tree.add([
    "level1",
    {
      id: "level2-2",
      label: "Level 2.1",
    },
    {
      id: "level3-1",
      label: "Level 3.1",
    },
  ]);
  tree.add([
    {
      id: "level1",
      label: "Level 1",
    },
    {
      id: "level2",
      label: "Level 2",
    },
    {
      id: "level3",
      label: "Level 3",
      type: "js",
    },
  ]);
  tree.add(["level1.1", "level2", { id: "level3", type: "url" }]);
}

/**
 * Test if the nodes are inserted correctly in the tree.
 */
function testTreeItemInsertedCorrectly(tree, doc) {
  is(
    tree.root.children.children.length,
    2,
    "Number of top level elements match"
  );
  is(
    tree.root.children.firstChild.lastChild.children.length,
    3,
    "Number of first second level elements match"
  );
  is(
    tree.root.children.lastChild.lastChild.children.length,
    1,
    "Number of second second level elements match"
  );

  ok(tree.root.items.has("level1"), "Level1 top level element exists");
  is(
    tree.root.children.firstChild.dataset.id,
    JSON.stringify(["level1"]),
    "Data id of first top level element matches"
  );
  is(
    tree.root.children.firstChild.firstChild.textContent,
    "Level 1",
    "Text content of first top level element matches"
  );

  ok(tree.root.items.has("level1.1"), "Level1.1 top level element exists");
  is(
    tree.root.children.firstChild.nextSibling.dataset.id,
    JSON.stringify(["level1.1"]),
    "Data id of second top level element matches"
  );
  is(
    tree.root.children.firstChild.nextSibling.firstChild.textContent,
    "level1.1",
    "Text content of second top level element matches"
  );

  // Adding a new non text item in the tree.
  const node = doc.createElement("div");
  node.textContent = "Foo Bar";
  node.className = "foo bar";
  tree.add([
    {
      id: "level1.2",
      node,
      attachment: {
        foo: "bar",
      },
    },
  ]);

  is(
    tree.root.children.children.length,
    3,
    "Number of top level elements match after update"
  );
  ok(tree.root.items.has("level1.2"), "New level node got added");
  ok(
    tree.attachments.has(JSON.stringify(["level1.2"])),
    "Attachment is present for newly added node"
  );
  // The item should be added before level1 and level 1.1 as lexical sorting
  is(
    tree.root.children.firstChild.dataset.id,
    JSON.stringify(["level1.2"]),
    "Data id of last top level element matches"
  );
  is(
    tree.root.children.firstChild.firstChild.firstChild,
    node,
    "Newly added node is inserted at the right location"
  );
}

/**
 * Populate the unsorted tree.
 */
function populateUnsortedTree(tree) {
  tree.sorted = false;

  tree.add([{ id: "g-1", label: "g-1" }]);
  tree.add(["g-1", { id: "d-2", label: "d-2.1" }]);
  tree.add(["g-1", { id: "b-2", label: "b-2.2" }]);
  tree.add(["g-1", { id: "a-2", label: "a-2.3" }]);
}

/**
 * Test if the nodes are inserted correctly in the unsorted tree.
 */
function testUnsortedTreeItemInsertedCorrectly(tree) {
  ok(tree.root.items.has("g-1"), "g-1 top level element exists");

  is(
    tree.root.children.firstChild.lastChild.children.length,
    3,
    "Number of children for g-1 matches"
  );
  is(
    tree.root.children.firstChild.dataset.id,
    JSON.stringify(["g-1"]),
    "Data id of g-1 matches"
  );
  is(
    tree.root.children.firstChild.firstChild.textContent,
    "g-1",
    "Text content of g-1 matches"
  );
  is(
    tree.root.children.firstChild.lastChild.firstChild.dataset.id,
    JSON.stringify(["g-1", "d-2"]),
    "Data id of d-2 matches"
  );
  is(
    tree.root.children.firstChild.lastChild.firstChild.textContent,
    "d-2.1",
    "Text content of d-2 matches"
  );
  is(
    tree.root.children.firstChild.lastChild.firstChild.nextSibling.textContent,
    "b-2.2",
    "Text content of b-2 matches"
  );
  is(
    tree.root.children.firstChild.lastChild.lastChild.textContent,
    "a-2.3",
    "Text content of a-2 matches"
  );
}

/**
 * Tests if the API exposed by TreeWidget works properly
 */
function testAPI(tree, doc) {
  info("Testing TreeWidget API");
  // Check if selectItem and selectedItem setter works as expected
  // Nothing should be selected beforehand
  ok(!doc.querySelector(".theme-selected"), "Nothing is selected");
  tree.selectItem(["level1"]);
  const node = doc.querySelector(".theme-selected");
  ok(!!node, "Something got selected");
  is(
    node.parentNode.dataset.id,
    JSON.stringify(["level1"]),
    "Correct node selected"
  );

  tree.selectItem(["level1", "level2"]);
  const node2 = doc.querySelector(".theme-selected");
  ok(!!node2, "Something is still selected");
  isnot(node, node2, "Newly selected node is different from previous");
  is(
    node2.parentNode.dataset.id,
    JSON.stringify(["level1", "level2"]),
    "Correct node selected"
  );

  // test if selectedItem getter works
  is(tree.selectedItem.length, 2, "Correct length of selected item");
  is(tree.selectedItem[0], "level1", "Correct selected item");
  is(tree.selectedItem[1], "level2", "Correct selected item");

  // test if isSelected works
  ok(tree.isSelected(["level1", "level2"]), "isSelected works");

  tree.selectedItem = ["level1"];
  const node3 = doc.querySelector(".theme-selected");
  ok(!!node3, "Something is still selected");
  isnot(node2, node3, "Newly selected node is different from previous");
  is(node3, node, "First and third selected nodes should be same");
  is(
    node3.parentNode.dataset.id,
    JSON.stringify(["level1"]),
    "Correct node selected"
  );

  // test if selectedItem getter works
  is(tree.selectedItem.length, 1, "Correct length of selected item");
  is(tree.selectedItem[0], "level1", "Correct selected item");

  // test if clear selection works
  tree.clearSelection();
  ok(
    !doc.querySelector(".theme-selected"),
    "Nothing selected after clear selection call"
  );

  // test if collapseAll/expandAll work
  ok(!!doc.querySelectorAll("[expanded]").length, "Some nodes are expanded");
  tree.collapseAll();
  is(
    doc.querySelectorAll("[expanded]").length,
    0,
    "Nothing is expanded after collapseAll call"
  );
  tree.expandAll();
  is(
    doc.querySelectorAll("[expanded]").length,
    13,
    "All tree items expanded after expandAll call"
  );

  // test if selectNextItem and selectPreviousItem work
  tree.selectedItem = ["level1", "level2"];
  ok(tree.isSelected(["level1", "level2"]), "Correct item selected");
  tree.selectNextItem();
  ok(
    tree.isSelected(["level1", "level2", "level3"]),
    "Correct item selected after selectNextItem call"
  );

  tree.selectNextItem();
  ok(
    tree.isSelected(["level1", "level2-1"]),
    "Correct item selected after second selectNextItem call"
  );

  tree.selectNextItem();
  ok(
    tree.isSelected(["level1", "level2-1", "level3-1"]),
    "Correct item selected after third selectNextItem call"
  );

  tree.selectPreviousItem();
  ok(
    tree.isSelected(["level1", "level2-1"]),
    "Correct item selected after selectPreviousItem call"
  );

  tree.selectPreviousItem();
  ok(
    tree.isSelected(["level1", "level2", "level3"]),
    "Correct item selected after second selectPreviousItem call"
  );

  // test if remove works
  ok(
    doc.querySelector(
      "[data-id='" + JSON.stringify(["level1", "level2", "level3"]) + "']"
    ),
    "level1-level2-level3 item exists before removing"
  );
  tree.remove(["level1", "level2", "level3"]);
  ok(
    !doc.querySelector(
      "[data-id='" + JSON.stringify(["level1", "level2", "level3"]) + "']"
    ),
    "level1-level2-level3 item does not exist after removing"
  );
  const level2item = doc.querySelector(
    "[data-id='" +
      JSON.stringify(["level1", "level2"]) +
      "'] > .tree-widget-item"
  );
  ok(
    level2item.hasAttribute("empty"),
    "level1-level2 item is marked as empty after removing"
  );

  tree.add([
    {
      id: "level1",
      label: "Level 1",
    },
    {
      id: "level2",
      label: "Level 2",
    },
    {
      id: "level3",
      label: "Level 3",
      type: "js",
    },
  ]);

  // test if clearing the tree works
  is(
    doc.querySelectorAll("[level='1']").length,
    3,
    "Correct number of top level items before clearing"
  );
  tree.clear();
  is(
    doc.querySelectorAll("[level='1']").length,
    0,
    "No top level item after clearing the tree"
  );
}
