import {
  bootstrapModeler,
  inject
} from 'test/TestHelper';

import coreModule from 'lib/core';
import bendpointsModule from 'diagram-js/lib/features/bendpoints';
import modelingModule from 'lib/features/modeling';
import labelEditingModule from 'lib/features/label-editing';
import spaceTool from 'diagram-js/lib/features/space-tool';

import {
  createCanvasEvent as canvasEvent
} from '../../../util/MockEvents';

var testModules = [
  coreModule,
  modelingModule,
  labelEditingModule,
  bendpointsModule,
  spaceTool
];


describe('modeling - label layouting', function() {

  describe('should position created label', function() {

    var diagramXML = require('./LabelLayouting.initial.bpmn');

    beforeEach(bootstrapModeler(diagramXML, {
      modules: testModules
    }));


    it('horizontal', inject(function(modeling, elementRegistry) {

      // given
      var element1 = elementRegistry.get('StartEvent_1'),
          element2 = elementRegistry.get('ExclusiveGateway_2');

      // when
      var connection = modeling.connect(element1, element2);

      modeling.updateLabel(connection, 'foo');

      // then
      expect(connection.label.x).to.be.within(463, 465);
      expect(connection.label.y).to.be.within(335, 340);
    }));


    it('vertical', inject(function(modeling, elementRegistry) {

      // given
      var element1 = elementRegistry.get('StartEvent_1'),
          element2 = elementRegistry.get('ExclusiveGateway_1');

      // when
      var connection = modeling.connect(element1, element2);

      modeling.updateLabel(connection, 'foo');

      // then
      expect(connection.label.x).to.be.within(328, 330);
      expect(connection.label.y).to.be.within(225, 230);
    }));

  });


  describe('should move label', function() {

    var diagramXML = require('./LabelLayouting.move.bpmn');

    beforeEach(bootstrapModeler(diagramXML, {
      modules: testModules
    }));

    describe('on segment move', function() {

      it('left - no relayout', inject(function(elementRegistry, connectionSegmentMove, dragging) {

        // given
        var connection = elementRegistry.get('SequenceFlow_B'),
            labelPosition = getLabelPosition(connection);

        // when
        connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);

        dragging.move(canvasEvent({ x: -30, y: 0 }));

        dragging.end();

        // then
        expectLabelMoved(connection, labelPosition, { x: -30, y: 0 });
      }));


      it('left - remove bendpoint', inject(
        function(elementRegistry, connectionSegmentMove, dragging) {

          // given
          var connection = elementRegistry.get('SequenceFlow_B'),
              labelPosition = getLabelPosition(connection);

          // when
          connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);

          dragging.move(canvasEvent({ x: -70, y: 0 }));

          dragging.end();

          // then
          expectLabelMoved(connection, labelPosition, { x: -70, y: 24 });
        }
      ));


      it('right - no relayout', inject(
        function(elementRegistry, connectionSegmentMove, dragging) {

          // given
          var connection = elementRegistry.get('SequenceFlow_B'),
              labelPosition = getLabelPosition(connection);

          // when
          connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);

          dragging.move(canvasEvent({ x: 30, y: 0 }));

          dragging.end();

          // then
          expectLabelMoved(connection, labelPosition, { x: 30, y: 0 });
        }
      ));


      it('right - remove bendpoint', inject(
        function(elementRegistry, connectionSegmentMove, dragging) {

          // given
          var connection = elementRegistry.get('SequenceFlow_B'),
              labelPosition = getLabelPosition(connection);

          // when
          connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);

          dragging.move(canvasEvent({ x: 70, y: 0 }));

          dragging.end();

          // then
          expectLabelMoved(connection, labelPosition, { x: 70, y: -16 });
        }
      ));


      it('down', inject(function(elementRegistry, connectionSegmentMove, dragging) {

        // given
        var connection = elementRegistry.get('SequenceFlow_C'),
            labelPosition = getLabelPosition(connection);

        // when
        connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);

        dragging.move(canvasEvent({ x: 0, y: 70 }));

        dragging.end();

        // then
        expectLabelMoved(connection, labelPosition, { x: 0, y: 70 });

      }));


      it('up - remove two bendpoints', inject(
        function(elementRegistry, connectionSegmentMove, dragging) {

          // given
          var connection = elementRegistry.get('SequenceFlow_C'),
              labelPosition = getLabelPosition(connection);

          // when
          connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);

          dragging.move(canvasEvent({ x: 0, y: -90 }));

          dragging.end();

          // then
          expectLabelMoved(connection, labelPosition, { x: -39, y: -85 });

        }
      ));


      it('up - remove two bendpoints - redundant waypoints', inject(
        function(elementRegistry, connectionSegmentMove, dragging, bendpointMove) {

          // given
          var connection = elementRegistry.get('SequenceFlow_C');

          bendpointMove.start(canvasEvent({ x: 0, y: 0 }), connection, 1);
          dragging.move(canvasEvent({ x: 620, y: 435 }));
          dragging.end();

          bendpointMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);
          dragging.move(canvasEvent({ x: 300, y: 435 }));
          dragging.end();

          var labelPosition = getLabelPosition(connection);

          // when
          connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);
          dragging.move(canvasEvent({ x: 0, y: -160 }));
          dragging.end();

          // then
          expect(getLabelPosition(connection)).not.to.eql(labelPosition);

        }
      ));

    });


    describe('on reconnect', function() {

      it('start', inject(function(elementRegistry, modeling) {

        // given
        var connection = elementRegistry.get('SequenceFlow_D'),
            shape = elementRegistry.get('Task_1');

        // when
        modeling.reconnectStart(connection, shape, { x: 0, y: 0 });

        // then
        expect(Math.round(connection.label.x)).to.be.within(570, 575);
        expect(Math.round(connection.label.y)).to.be.within(136, 138);

      }));


      it('end', inject(function(elementRegistry, modeling) {

        // given
        var connection = elementRegistry.get('SequenceFlow_A'),
            shape = elementRegistry.get('Task_2');

        // when
        modeling.reconnectEnd(connection, shape, { x: 294, y: 270 });

        // then
        expect(Math.round(connection.label.x)).to.be.within(257, 270);
        expect(Math.round(connection.label.y)).to.be.within(240, 250);

      }));

    });


    describe('on shape move', function() {

      it('down', inject(function(elementRegistry, modeling) {

        // given
        var connection = elementRegistry.get('SequenceFlow_E'),
            shape = elementRegistry.get('Task_4'),
            labelPosition = getLabelPosition(connection);

        // when
        modeling.moveShape(shape, { x: 0, y: 100 });

        // then
        expectLabelMoved(connection, labelPosition, { x: 0, y: 100 });

      }));

    });


    describe('on bendpoint add/delete/moving', function() {


      it('move, label on segment', inject(function(elementRegistry, bendpointMove, dragging) {

        // given
        var connection = elementRegistry.get('SequenceFlow_B');

        // when
        bendpointMove.start(canvasEvent({ x: 0, y: 0 }), connection, 1);

        dragging.move(canvasEvent({ x: 455 + 50, y: 120 }));

        dragging.end();

        // then
        expect(Math.round(connection.label.x)).to.be.within(466, 468);
        expect(Math.round(connection.label.y)).to.be.within(170, 171);

      }));


      it('move, label on bendpoint', inject(
        function(elementRegistry, bendpointMove, dragging, modeling) {

          // given
          var connection = elementRegistry.get('SequenceFlow_C');

          // label out of segments, on a bendpoint (idx=1)
          modeling.moveShape(connection.label, { x: 40, y: 0 });

          // when
          bendpointMove.start(canvasEvent({ x: 0, y: 0 }), connection, 1);

          dragging.move(canvasEvent({ x: 455 + 50, y: 500 }));

          dragging.end();

          // then
          expect(Math.round(connection.label.x)).to.be.within(517, 519);
          expect(Math.round(connection.label.y)).to.be.equal(507);

        }
      ));


      it('remove bendpoint when label on segment', inject(
        function(elementRegistry, bendpointMove, dragging) {

          // given
          var connection = elementRegistry.get('SequenceFlow_B');

          // when
          bendpointMove.start(canvasEvent({ x: 0, y: 0 }), connection, 1);

          dragging.move(canvasEvent({ x: 455, y: 120 + 160 }));

          dragging.end();

          // then
          expect(Math.round(connection.label.x)).to.be.within(418, 421);
          expect(Math.round(connection.label.y)).to.be.equal(191);

        }
      ));


      it('add bendpoint, label on right segment', inject(
        function(elementRegistry, bendpointMove, dragging, canvas) {

          // given
          var connection = elementRegistry.get('SequenceFlow_A');

          // when
          bendpointMove.start(canvasEvent({ x: 0, y: 0 }), connection, 1, true);

          dragging.hover({
            element: connection,
            gfx: canvas.getGraphics(connection)
          });

          dragging.move(canvasEvent({ x: 220, y: 200 }));

          dragging.end();

          // then
          expect(Math.round(connection.label.x)).to.be.within(248, 251);
          expect(Math.round(connection.label.y)).to.be.equal(152);

        }
      ));


      it('add bendpoint, label on left segment', inject(
        function(elementRegistry, bendpointMove, dragging, canvas) {

          // given
          var connection = elementRegistry.get('SequenceFlow_A');

          // when
          bendpointMove.start(canvasEvent({ x: 0, y: 0 }), connection, 1, true);

          dragging.hover({
            element: connection,
            gfx: canvas.getGraphics(connection)
          });

          dragging.move(canvasEvent({ x: 260, y: 200 }));

          dragging.end();

          // then
          expect(connection.label.x).to.be.within(240, 242);
          expect(connection.label.y).to.be.within(148, 149);

        }
      ));


      it('remove bendpoint when label on bendpoint', inject(
        function(elementRegistry, bendpointMove, dragging, modeling) {

          // given
          var connection = elementRegistry.get('SequenceFlow_C');

          // label out of segments, on a bendpoint
          modeling.moveShape(connection.label, { x: 40, y: 0 });

          // when
          bendpointMove.start(canvasEvent({ x: 0, y: 0 }), connection, 1);

          dragging.move(canvasEvent({ x: 455, y: 320 }));

          dragging.end();

          // then
          expect(Math.round(connection.label.x)).to.be.within(462, 465);
          expect(Math.round(connection.label.y)).to.be.within(290, 293);

        }
      ));


      it('add benpoint, label on segment, should not move', inject(
        function(elementRegistry, bendpointMove, canvas, dragging, modeling) {

          // given
          var connection = elementRegistry.get('SequenceFlow_C');

          // label out of segments, on a bendpoint
          modeling.moveShape(connection.label, { x: 40, y: -60 });
          var position = getLabelPosition(connection);

          // when
          bendpointMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2, true);

          dragging.hover({
            element: connection,
            gfx: canvas.getGraphics(connection)
          });

          dragging.move(canvasEvent({ x: 400, y: 350 }));

          dragging.end();

          // then
          expectLabelMoved(connection, position, { x: 0, y: 0 });

        }
      ));

    });


    describe('special cases', function() {

      it('should behave properly, right after importing', inject(
        function(elementRegistry, connectionSegmentMove, dragging, modeling) {

          // given
          var connection = elementRegistry.get('SequenceFlow_C'),
              labelPosition = getLabelPosition(connection),
              label = connection.label;

          // when
          connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);

          dragging.move(canvasEvent({ x: 0, y: 70 }));

          dragging.end();

          // move label
          modeling.moveShape(label, { x: 40, y: -30 });

          // drag again
          connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 1);

          dragging.move(canvasEvent({ x: -20, y: 0 }));

          dragging.end();

          // then
          expectLabelMoved(connection, labelPosition, { x: 20, y: 40 });

        }
      ));


      it('should reposition on right segment', inject(
        function(elementRegistry, connectionSegmentMove, dragging) {

          // given
          var connection = elementRegistry.get('SequenceFlow_E'),
              labelPosition = getLabelPosition(connection);

          // when
          connectionSegmentMove.start(canvasEvent({ x: 0, y: 0 }), connection, 2);

          dragging.move(canvasEvent({ x: -100, y: 0 }));

          dragging.end();

          // then
          expect(connection.label.y - labelPosition.y).to.be.within(-77, -73);
          expect(connection.label.x - labelPosition.x).to.be.within(-54, -51);

        }
      ));

    });

  });


  describe('integration', function() {

    describe('space tool', function() {

      var diagramXML = require('./LabelLayouting.special.bpmn');

      beforeEach(bootstrapModeler(diagramXML, {
        modules: testModules
      }));

      beforeEach(inject(function(dragging) {
        dragging.setOptions({ manual: true });
      }));


      it('should move with a skewed line', inject(function(elementRegistry, spaceTool, dragging) {

        // given
        var connection = elementRegistry.get('SequenceFlow_1'),
            labelPosition = getLabelPosition(connection);

        // when
        spaceTool.activateMakeSpace(canvasEvent({ x: 500, y: 225 }));

        dragging.move(canvasEvent({ x: 550, y: 225 }));
        dragging.end();

        // then
        expectLabelMoved(connection, labelPosition, { x: 25, y: 0 });
      }));

    });

  });

});



function getLabelPosition(connection) {

  var label = connection.label;

  var mid = {
    x: label.x + (label.width / 2),
    y: label.y + (label.height / 2)
  };

  return mid;
}


function expectLabelMoved(connection, oldPosition, expectedDelta) {

  var newPosition = getLabelPosition(connection);

  var delta = {
    x: Math.round(newPosition.x - oldPosition.x),
    y: Math.round(newPosition.y - oldPosition.y)
  };

  expect(delta).to.eql(expectedDelta);
}