import * as ko from "knockout";
import * as Survey from "survey-knockout";
import { SurveyUndoRedo } from "../src/undoredo";
import { SurveyEditor } from "../src/editor";

export default QUnit.module("UndoRedoTests");

QUnit.test("Enabeling undo redo", function(assert) {
  var survey = new Survey.Survey(getSurveyJson());
  var undo = new SurveyUndoRedo();
  assert.equal(undo.koCanUndo(), false, "CanUndo 1");
  assert.equal(undo.koCanRedo(), false, "CanRedo 1");
  undo.setCurrent(survey, null);
  assert.equal(undo.koCanUndo(), false, "CanUndo 2");
  assert.equal(undo.koCanRedo(), false, "CanRedo 2");
  undo.setCurrent(survey, null);
  assert.equal(undo.koCanUndo(), true, "CanUndo 3");
  assert.equal(undo.koCanRedo(), false, "CanRedo 3");
  undo.undo();
  assert.equal(undo.koCanUndo(), false, "CanUndo 4");
  assert.equal(undo.koCanRedo(), true, "CanRedo 4");
  undo.redo();
  assert.equal(undo.koCanUndo(), true, "CanUndo 5");
  assert.equal(undo.koCanRedo(), false, "CanRedo 5");
  undo.undo();
  undo.setCurrent(survey, null);
  assert.equal(undo.koCanUndo(), true, "CanUndo 6");
  assert.equal(undo.koCanRedo(), false, "CanRedo 6");
  undo.setCurrent(survey, null);
  assert.equal(undo.koCanUndo(), true, "CanUndo 7");
  assert.equal(undo.koCanRedo(), false, "CanRedo 7");
  undo.undo();
  assert.equal(undo.koCanUndo(), true, "CanUndo 8");
  assert.equal(undo.koCanRedo(), true, "CanRedo 8");
  undo.undo();
  assert.equal(undo.koCanUndo(), false, "CanUndo 9");
  assert.equal(undo.koCanRedo(), true, "CanRedo 9");
});
QUnit.test("Do undo", function(assert) {
  var survey = new Survey.Survey(getSurveyJson());
  var undo = new SurveyUndoRedo();
  undo.setCurrent(survey, null);
  survey.addNewPage("New Page");
  undo.setCurrent(survey, null);
  assert.equal(4, survey.pages.length);
  survey = new Survey.Survey(undo.undo().surveyJSON);
  assert.equal(3, survey.pages.length);
});
QUnit.test("Do undo/redo", function(assert) {
  var survey = new Survey.Survey(getSurveyJson());
  var undo = new SurveyUndoRedo();
  undo.setCurrent(survey, null);
  survey.addNewPage("New Page");
  undo.setCurrent(survey, null);
  survey = new Survey.Survey(undo.undo().surveyJSON);
  assert.equal(3, survey.pages.length, "3 pages after undo");
  survey = new Survey.Survey(undo.redo().surveyJSON);
  assert.equal(4, survey.pages.length, "4 pages after redo");
});
QUnit.test("Undo maximum count", function(assert) {
  var survey = new Survey.Survey(getSurveyJson());
  var undo = new SurveyUndoRedo();
  undo.maximumCount = 2;
  for (var i = 0; i < 10; i++) {
    undo.setCurrent(survey, null);
  }
  assert.equal(undo.koCanUndo(), true, "Initial can undo");
  undo.undo();
  undo.undo();
  assert.equal(undo.koCanUndo(), false, "Store only for two undo");
});
QUnit.test("Do undo/redo with editor", function(assert) {
  var editor = new SurveyEditor();
  editor.text = JSON.stringify(getSurveyJson());
  editor.addPage();
  assert.equal(4, editor.survey.pages.length);
  editor.doUndoClick();
  assert.equal(3, editor.survey.pages.length);
  editor.doRedoClick();
  assert.equal(4, editor.survey.pages.length);
  assert.equal(
    editor.koSelectedObject().value,
    editor.survey.pages[editor.survey.pages.length - 1],
    "the last page should be selected"
  );
});

function getSurveyJson(): any {
  return {
    pages: [
      {
        name: "page1",
        questions: [
          { type: "text", name: "question1" },
          {
            name: "question2",
            choices: [
              "one",
              { value: "two", text: "second value" },
              { value: 3, text: "third value" }
            ],
            type: "checkbox"
          }
        ]
      },
      { name: "page2", questions: [{ name: "question3", type: "comment" }] },
      {
        name: "page3",
        questions: [
          {
            name: "question4",
            columns: ["Column 1", "Column 2", "Column 3"],
            rows: ["Row 1", "Row 2"],
            type: "matrix"
          },
          { name: "question5", type: "rating" }
        ]
      }
    ]
  };
}