// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/rendering.dart';
import 'package:flutter/semantics.dart';
import 'package:test/test.dart';
import 'package:vector_math/vector_math_64.dart';

import '../rendering/rendering_tester.dart';


void main() {
  group('SemanticsNode', () {
    const SemanticsTag tag1 = const SemanticsTag('Tag One');
    const SemanticsTag tag2 = const SemanticsTag('Tag Two');
    const SemanticsTag tag3 = const SemanticsTag('Tag Three');

    test('tagging', () {
      final SemanticsNode node = new SemanticsNode();

      expect(node.isTagged(tag1), isFalse);
      expect(node.isTagged(tag2), isFalse);

      node.tags = new Set<SemanticsTag>()..add(tag1);
      expect(node.isTagged(tag1), isTrue);
      expect(node.isTagged(tag2), isFalse);

      node.tags.add(tag2);
      expect(node.isTagged(tag1), isTrue);
      expect(node.isTagged(tag2), isTrue);
    });

    test('getSemanticsData includes tags', () {
      final Set<SemanticsTag> tags = new Set<SemanticsTag>()
        ..add(tag1)
        ..add(tag2);

      final SemanticsNode node = new SemanticsNode()
        ..rect = new Rect.fromLTRB(0.0, 0.0, 10.0, 10.0)
        ..tags = tags;

      expect(node.getSemanticsData().tags, tags);

      tags.add(tag3);

      final SemanticsConfiguration config = new SemanticsConfiguration()
        ..isMergingSemanticsOfDescendants = true;

      node.updateWith(
        config: config,
        childrenInInversePaintOrder: <SemanticsNode>[
          new SemanticsNode()
            ..isMergedIntoParent = true
            ..rect = new Rect.fromLTRB(5.0, 5.0, 10.0, 10.0)
            ..tags = tags,
        ],
      );

      expect(node.getSemanticsData().tags, tags);
    });

    test('after markNeedsSemanticsUpdate() all render objects between two semantic boundaries are asked for annotations', () {
      renderer.pipelineOwner.ensureSemantics();

      TestRender middle;
      final TestRender root = new TestRender(
        hasTapAction: true,
        isSemanticBoundary: true,
        child: new TestRender(
          hasLongPressAction: true,
          isSemanticBoundary: false,
          child: middle = new TestRender(
            hasScrollLeftAction: true,
            isSemanticBoundary: false,
            child: new TestRender(
              hasScrollRightAction: true,
              isSemanticBoundary: false,
              child: new TestRender(
                hasScrollUpAction: true,
                isSemanticBoundary: true,
              )
            )
          )
        )
      );

      layout(root);
      pumpFrame(phase: EnginePhase.flushSemantics);

      int expectedActions = SemanticsAction.tap.index | SemanticsAction.longPress.index | SemanticsAction.scrollLeft.index | SemanticsAction.scrollRight.index;
      expect(root.debugSemantics.getSemanticsData().actions, expectedActions);

      middle
        ..hasScrollLeftAction = false
        ..hasScrollDownAction = true;
      middle.markNeedsSemanticsUpdate();

      pumpFrame(phase: EnginePhase.flushSemantics);

      expectedActions = SemanticsAction.tap.index | SemanticsAction.longPress.index | SemanticsAction.scrollDown.index | SemanticsAction.scrollRight.index;
      expect(root.debugSemantics.getSemanticsData().actions, expectedActions);
    });
  });

  test('toStringDeep() does not throw with transform == null', () {
    final SemanticsNode child1 = new SemanticsNode()
      ..rect = new Rect.fromLTRB(0.0, 0.0, 5.0, 5.0);
    final SemanticsNode child2 = new SemanticsNode()
      ..rect = new Rect.fromLTRB(5.0, 0.0, 10.0, 5.0);
    final SemanticsNode root = new SemanticsNode()
      ..rect = new Rect.fromLTRB(0.0, 0.0, 10.0, 5.0);
    root.updateWith(
      config: null,
      childrenInInversePaintOrder: <SemanticsNode>[child1, child2],
    );

    expect(root.transform, isNull);
    expect(child1.transform, isNull);
    expect(child2.transform, isNull);

    expect(
      root.toStringDeep(childOrder: DebugSemanticsDumpOrder.traversal),
      'SemanticsNode#8(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 10.0, 5.0))\n'
      '├SemanticsNode#6(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 5.0, 5.0))\n'
      '└SemanticsNode#7(STALE, owner: null, Rect.fromLTRB(5.0, 0.0, 10.0, 5.0))\n',
    );
  });

  test('toStringDeep respects childOrder parameter', () {
    final SemanticsNode child1 = new SemanticsNode()
      ..rect = new Rect.fromLTRB(15.0, 0.0, 20.0, 5.0);
    final SemanticsNode child2 = new SemanticsNode()
      ..rect = new Rect.fromLTRB(10.0, 0.0, 15.0, 5.0);
    final SemanticsNode root = new SemanticsNode()
      ..rect = new Rect.fromLTRB(0.0, 0.0, 20.0, 5.0);
    root.updateWith(
      config: null,
      childrenInInversePaintOrder: <SemanticsNode>[child1, child2],
    );
    expect(
      root.toStringDeep(childOrder: DebugSemanticsDumpOrder.traversal),
      'SemanticsNode#11(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 20.0, 5.0))\n'
      '├SemanticsNode#10(STALE, owner: null, Rect.fromLTRB(10.0, 0.0, 15.0, 5.0))\n'
      '└SemanticsNode#9(STALE, owner: null, Rect.fromLTRB(15.0, 0.0, 20.0, 5.0))\n',
    );

    expect(
      root.toStringDeep(childOrder: DebugSemanticsDumpOrder.inverseHitTest),
      'SemanticsNode#11(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 20.0, 5.0))\n'
      '├SemanticsNode#9(STALE, owner: null, Rect.fromLTRB(15.0, 0.0, 20.0, 5.0))\n'
      '└SemanticsNode#10(STALE, owner: null, Rect.fromLTRB(10.0, 0.0, 15.0, 5.0))\n',
    );

    final SemanticsNode child3 = new SemanticsNode()
      ..rect = new Rect.fromLTRB(0.0, 0.0, 10.0, 5.0);
    child3.updateWith(
      config: null,
      childrenInInversePaintOrder: <SemanticsNode>[
        new SemanticsNode()
          ..rect = new Rect.fromLTRB(5.0, 0.0, 10.0, 5.0),
        new SemanticsNode()
          ..rect = new Rect.fromLTRB(0.0, 0.0, 5.0, 5.0),
      ],
    );

    final SemanticsNode rootComplex = new SemanticsNode()
      ..rect = new Rect.fromLTRB(0.0, 0.0, 25.0, 5.0);
    rootComplex.updateWith(
        config: null,
        childrenInInversePaintOrder: <SemanticsNode>[child1, child2, child3]
    );

    expect(
      rootComplex.toStringDeep(childOrder: DebugSemanticsDumpOrder.traversal),
      'SemanticsNode#15(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 25.0, 5.0))\n'
      '├SemanticsNode#12(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 10.0, 5.0))\n'
      '│├SemanticsNode#14(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 5.0, 5.0))\n'
      '│└SemanticsNode#13(STALE, owner: null, Rect.fromLTRB(5.0, 0.0, 10.0, 5.0))\n'
      '├SemanticsNode#10(STALE, owner: null, Rect.fromLTRB(10.0, 0.0, 15.0, 5.0))\n'
      '└SemanticsNode#9(STALE, owner: null, Rect.fromLTRB(15.0, 0.0, 20.0, 5.0))\n',
    );

    expect(
      rootComplex.toStringDeep(childOrder: DebugSemanticsDumpOrder.inverseHitTest),
      'SemanticsNode#15(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 25.0, 5.0))\n'
      '├SemanticsNode#9(STALE, owner: null, Rect.fromLTRB(15.0, 0.0, 20.0, 5.0))\n'
      '├SemanticsNode#10(STALE, owner: null, Rect.fromLTRB(10.0, 0.0, 15.0, 5.0))\n'
      '└SemanticsNode#12(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 10.0, 5.0))\n'
      ' ├SemanticsNode#13(STALE, owner: null, Rect.fromLTRB(5.0, 0.0, 10.0, 5.0))\n'
      ' └SemanticsNode#14(STALE, owner: null, Rect.fromLTRB(0.0, 0.0, 5.0, 5.0))\n',
    );
  });

  test('debug properties', () {
    final SemanticsNode minimalProperties = new SemanticsNode();
    expect(
      minimalProperties.toStringDeep(),
      'SemanticsNode#16(Rect.fromLTRB(0.0, 0.0, 0.0, 0.0))\n',
    );

    expect(
      minimalProperties.toStringDeep(minLevel: DiagnosticLevel.hidden),
      'SemanticsNode#16(owner: null, isPartOfNodeMerging: false, Rect.fromLTRB(0.0, 0.0, 0.0, 0.0), actions: [], isSelected: false, isFocused: false, isButton: false, isTextField: false, label: "", value: "", increasedValue: "", decreasedValue: "", hint: "", textDirection: null)\n'
    );

    final SemanticsConfiguration config = new SemanticsConfiguration()
      ..isMergingSemanticsOfDescendants = true
      ..onScrollUp = () { }
      ..onLongPress = () { }
      ..onShowOnScreen = () { }
      ..isChecked = false
      ..isSelected = true
      ..isButton = true
      ..label = 'Use all the properties'
      ..textDirection = TextDirection.rtl;
    final SemanticsNode allProperties = new SemanticsNode()
      ..rect = new Rect.fromLTWH(50.0, 10.0, 20.0, 30.0)
      ..transform = new Matrix4.translation(new Vector3(10.0, 10.0, 0.0))
      ..updateWith(config: config, childrenInInversePaintOrder: null);
    expect(
      allProperties.toStringDeep(),
      'SemanticsNode#17(STALE, owner: null, leaf merge, Rect.fromLTRB(60.0, 20.0, 80.0, 50.0), actions: [longPress, scrollUp, showOnScreen], unchecked, selected, button, label: "Use all the properties", textDirection: rtl)\n',
    );
    expect(
      allProperties.getSemanticsData().toString(),
      'SemanticsData(Rect.fromLTRB(50.0, 10.0, 70.0, 40.0), [1.0,0.0,0.0,10.0; 0.0,1.0,0.0,10.0; 0.0,0.0,1.0,0.0; 0.0,0.0,0.0,1.0], actions: [longPress, scrollUp, showOnScreen], flags: [hasCheckedState, isSelected, isButton], label: "Use all the properties", textDirection: rtl)',
    );

    final SemanticsNode scaled = new SemanticsNode()
      ..rect = new Rect.fromLTWH(50.0, 10.0, 20.0, 30.0)
      ..transform = new Matrix4.diagonal3(new Vector3(10.0, 10.0, 1.0));
    expect(
      scaled.toStringDeep(),
      'SemanticsNode#18(STALE, owner: null, Rect.fromLTRB(50.0, 10.0, 70.0, 40.0) scaled by 10.0x)\n',
    );
    expect(
      scaled.getSemanticsData().toString(),
      'SemanticsData(Rect.fromLTRB(50.0, 10.0, 70.0, 40.0), [10.0,0.0,0.0,0.0; 0.0,10.0,0.0,0.0; 0.0,0.0,1.0,0.0; 0.0,0.0,0.0,1.0])',
    );
  });

  test('SemanticsConfiguration getter/setter', () {
    final SemanticsConfiguration config = new SemanticsConfiguration();

    expect(config.isSemanticBoundary, isFalse);
    expect(config.isButton, isFalse);
    expect(config.isMergingSemanticsOfDescendants, isFalse);
    expect(config.isChecked, isFalse);
    expect(config.isSelected, isFalse);
    expect(config.isBlockingSemanticsOfPreviouslyPaintedNodes, isFalse);
    expect(config.isFocused, isFalse);
    expect(config.isMergingDescendantsIntoOneNode, isFalse);
    expect(config.isTextField, isFalse);

    expect(config.onShowOnScreen, isNull);
    expect(config.onScrollDown, isNull);
    expect(config.onScrollUp, isNull);
    expect(config.onScrollLeft, isNull);
    expect(config.onScrollRight, isNull);
    expect(config.onLongPress, isNull);
    expect(config.onDecrease, isNull);
    expect(config.onIncrease, isNull);
    expect(config.onMoveCursorForwardByCharacter, isNull);
    expect(config.onMoveCursorBackwardByCharacter, isNull);
    expect(config.onTap, isNull);

    config.isSemanticBoundary = true;
    config.isButton = true;
    config.isMergingSemanticsOfDescendants = true;
    config.isChecked = true;
    config.isSelected = true;
    config.isBlockingSemanticsOfPreviouslyPaintedNodes = true;
    config.isFocused = true;
    config.isMergingDescendantsIntoOneNode = true;
    config.isTextField = true;

    final VoidCallback onShowOnScreen = () { };
    final VoidCallback onScrollDown = () { };
    final VoidCallback onScrollUp = () { };
    final VoidCallback onScrollLeft = () { };
    final VoidCallback onScrollRight = () { };
    final VoidCallback onLongPress = () { };
    final VoidCallback onDecrease = () { };
    final VoidCallback onIncrease = () { };
    final MoveCursorHandler onMoveCursorForwardByCharacter = (bool _) { };
    final MoveCursorHandler onMoveCursorBackwardByCharacter = (bool _) { };
    final VoidCallback onTap = () { };

    config.onShowOnScreen = onShowOnScreen;
    config.onScrollDown = onScrollDown;
    config.onScrollUp = onScrollUp;
    config.onScrollLeft = onScrollLeft;
    config.onScrollRight = onScrollRight;
    config.onLongPress = onLongPress;
    config.onDecrease = onDecrease;
    config.onIncrease = onIncrease;
    config.onMoveCursorForwardByCharacter = onMoveCursorForwardByCharacter;
    config.onMoveCursorBackwardByCharacter = onMoveCursorBackwardByCharacter;
    config.onTap = onTap;

    expect(config.isSemanticBoundary, isTrue);
    expect(config.isButton, isTrue);
    expect(config.isMergingSemanticsOfDescendants, isTrue);
    expect(config.isChecked, isTrue);
    expect(config.isSelected, isTrue);
    expect(config.isBlockingSemanticsOfPreviouslyPaintedNodes, isTrue);
    expect(config.isFocused, isTrue);
    expect(config.isMergingDescendantsIntoOneNode, isTrue);
    expect(config.isTextField, isTrue);

    expect(config.onShowOnScreen, same(onShowOnScreen));
    expect(config.onScrollDown, same(onScrollDown));
    expect(config.onScrollUp, same(onScrollUp));
    expect(config.onScrollLeft, same(onScrollLeft));
    expect(config.onScrollRight, same(onScrollRight));
    expect(config.onLongPress, same(onLongPress));
    expect(config.onDecrease, same(onDecrease));
    expect(config.onIncrease, same(onIncrease));
    expect(config.onMoveCursorForwardByCharacter, same(onMoveCursorForwardByCharacter));
    expect(config.onMoveCursorBackwardByCharacter, same(onMoveCursorBackwardByCharacter));
    expect(config.onTap, same(onTap));
  });
}

class TestRender extends RenderProxyBox {

  TestRender({
    this.hasTapAction: false,
    this.hasLongPressAction: false,
    this.hasScrollLeftAction: false,
    this.hasScrollRightAction: false,
    this.hasScrollUpAction: false,
    this.hasScrollDownAction: false,
    this.isSemanticBoundary,
    RenderObject child
  }) : super(child);

  bool hasTapAction;
  bool hasLongPressAction;
  bool hasScrollLeftAction;
  bool hasScrollRightAction;
  bool hasScrollUpAction;
  bool hasScrollDownAction;
  bool isSemanticBoundary;


  @override
  void describeSemanticsConfiguration(SemanticsConfiguration config) {
    super.describeSemanticsConfiguration(config);

    config.isSemanticBoundary = isSemanticBoundary;
    if (hasTapAction)
      config.onTap = () { };
    if (hasLongPressAction)
      config.onLongPress = () { };
    if (hasScrollLeftAction)
      config.onScrollLeft = () { };
    if (hasScrollRightAction)
      config.onScrollRight = () { };
    if (hasScrollUpAction)
      config.onScrollUp = () { };
    if (hasScrollDownAction)
      config.onScrollDown = () { };
  }
}
