'use strict';

var TestContainer = require('mocha-test-container-support');

var Diagram = require('diagram-js/lib/Diagram'),
    BpmnModdle = require('bpmn-moddle'),
    importBpmnDiagram = require('../../../lib/import/Importer').importBpmnDiagram,
    Viewer = require('../../../lib/Viewer');

var domMatches = require('min-dom/lib/matches');

var getChildrenGfx = require('diagram-js/lib/util/GraphicsUtil').getChildren;

var find = require('lodash/collection/find');

var is = require('../../../lib/util/ModelUtil').is;


describe('import - Importer', function() {

  function createDiagram(container, modules) {
    return new Diagram({
      canvas: { container: container },
      modules: modules
    });
  }

  var diagram;

  beforeEach(function() {
    diagram = createDiagram(TestContainer.get(this), Viewer.prototype._modules);
  });


  function runImport(diagram, xml, done) {

    var moddle = new BpmnModdle();

    moddle.fromXML(xml, function(err, definitions) {
      importBpmnDiagram(diagram, definitions, done);
    });
  }


  describe('events', function() {

    it('should fire <import.render.start> and <import.render.complete>', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/process.bpmn');

      var eventCount = 0;

      var eventBus = diagram.get('eventBus');

      // log events
      eventBus.on('import.render.start', function(event) {
        expect(event.definitions).to.exist;

        eventCount++;
      });

      eventBus.on('import.render.complete', function(event) {
        expect(event).to.have.property('error');
        expect(event).to.have.property('warnings');

        eventCount++;
      });

      // when
      runImport(diagram, xml, function(err, warnings) {

        // then
        expect(eventCount).to.equal(2);

        done(err);
      });
    });


    it('should fire <bpmnElement.added> during import', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/process.bpmn');

      var eventCount = 0;

      // log events
      diagram.get('eventBus').on('bpmnElement.added', function(e) {
        eventCount++;
      });

      // when
      runImport(diagram, xml, function(err, warnings) {

        // then
        expect(eventCount).to.equal(9);

        done(err);
      });
    });

  });


  describe('basics', function() {

    it('should import process', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/process.bpmn');

      var events = [];

      // log events
      diagram.get('eventBus').on('bpmnElement.added', function(e) {
        events.push({
          type: 'add',
          semantic: e.element.businessObject.id,
          di: e.element.businessObject.di.id,
          diagramElement: e.element && e.element.id
        });
      });

      // when
      runImport(diagram, xml, function(err, warnings) {

        // then
        expect(events).to.eql([
           { type: 'add', semantic: 'Process_1', di: 'BPMNPlane_1', diagramElement: 'Process_1' },
           { type: 'add', semantic: 'SubProcess_1', di: '_BPMNShape_SubProcess_2', diagramElement: 'SubProcess_1' },
           { type: 'add', semantic: 'StartEvent_1', di: '_BPMNShape_StartEvent_2', diagramElement: 'StartEvent_1' },
           { type: 'add', semantic: 'Task_1', di: '_BPMNShape_Task_2', diagramElement: 'Task_1' },
           { type: 'add', semantic: 'EndEvent_1', di: '_BPMNShape_EndEvent_2', diagramElement: 'EndEvent_1' },
           { type: 'add', semantic: 'StartEvent_2', di: '_BPMNShape_StartEvent_11', diagramElement: 'StartEvent_2' },
           { type: 'add', semantic: 'SequenceFlow_1', di: 'BPMNEdge_SequenceFlow_1', diagramElement: 'SequenceFlow_1' },
           { type: 'add', semantic: 'SequenceFlow_2', di: 'BPMNEdge_SequenceFlow_2', diagramElement: 'SequenceFlow_2' },
           { type: 'add', semantic: 'SequenceFlow_3', di: 'BPMNEdge_SequenceFlow_3', diagramElement: 'SequenceFlow_3' }
        ]);

        done(err);
      });
    });


    it('should import collaboration', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/collaboration.bpmn');

      var events = [];

      // log events
      diagram.get('eventBus').on('bpmnElement.added', function(e) {
        events.push({
          type: 'add',
          semantic: e.element.businessObject.id,
          di: e.element.businessObject.di.id,
          diagramElement: e.element && e.element.id
        });
      });

      // when
      runImport(diagram, xml, function(err, warnings) {

        // then
        expect(events).to.eql([
          { type: 'add', semantic: '_Collaboration_2', di: 'BPMNPlane_1', diagramElement: '_Collaboration_2' },
          { type: 'add', semantic: 'Participant_2', di: '_BPMNShape_Participant_2', diagramElement: 'Participant_2' },
          { type: 'add', semantic: 'Task_1', di: '_BPMNShape_Task_3', diagramElement: 'Task_1' },
          { type: 'add', semantic: 'Participant_1', di: '_BPMNShape_Participant_3', diagramElement: 'Participant_1' },
          { type: 'add', semantic: 'StartEvent_1', di: '_BPMNShape_StartEvent_3', diagramElement: 'StartEvent_1' },
          { type: 'add', semantic: 'Lane_1', di: '_BPMNShape_Lane_2', diagramElement: 'Lane_1' },
          { type: 'add', semantic: 'Lane_2', di: '_BPMNShape_Lane_3', diagramElement: 'Lane_2' },
          { type: 'add', semantic: 'Lane_3', di: '_BPMNShape_Lane_4', diagramElement: 'Lane_3' }
        ]);

        done(err);
      });

    });

  });


  describe('position', function() {

    var xml = require('../../fixtures/bpmn/import/position/position-testcase.bpmn');

    it('should round shape coordinates', function(done) {

      // given
      var events = {};

      // log events
      diagram.get('eventBus').on('bpmnElement.added', function(e) {

        events[e.element.id] = e.element;
      });

      runImport(diagram, xml, function(err, warnings) {

        //round up
        expect(events.ID_End.x).to.equal(Math.round(340.6));
        expect(events.ID_End.y).to.equal(Math.round(136.6));

        //round down
        expect(events.ID_Start.x).to.equal(Math.round(120.4));
        expect(events.ID_Start.y).to.equal(Math.round(135.4));

        done(err);
      });
    });


    it('should round shape dimensions', function(done) {

      // given
      var events = {};

      // log events
      diagram.get('eventBus').on('bpmnElement.added', function(e) {

        events[e.element.id] = e.element;
      });

      runImport(diagram, xml, function(err, warnings) {

        //round down
        expect(events.ID_Start.height).to.equal(Math.round(30.4));
        expect(events.ID_Start.width).to.equal(Math.round(30.4));

        done(err);
      });
    });

  });


  describe('order', function() {

    it('should import sequence flows and lanes behind other flow nodes', function(done) {

      var xml = require('./sequenceFlow-ordering.bpmn');

      // given
      var elementRegistry = diagram.get('elementRegistry');


      runImport(diagram, xml, function(err, warnings) {

        // when
        var processShape = elementRegistry.get('Participant_1jxpy8o');

        var children = processShape.children;

        // lanes
        // connections
        // other elements
        var correctlyOrdered = [].concat(
          children.filter(function(c) { return is(c, 'bpmn:Lane'); }),
          children.filter(function(c) { return c.waypoints; }),
          children.filter(function(c) { return !is(c, 'bpmn:Lane') && !c.waypoints; })
        );

        // then
        expectChildren(diagram, processShape, correctlyOrdered);

        done(err);
      });
    });

  });


  describe('elements', function() {

    it('should import boundary events', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/boundaryEvent.bpmn');

      var events = [];

      // log events
      diagram.get('eventBus').on('bpmnElement.added', function(e) {
        events.push({
          type: 'add',
          semantic: e.element.businessObject.id,
          di: e.element.businessObject.di.id,
          diagramElement: e.element && e.element.id
        });
      });

      // when
      runImport(diagram, xml, function(err, warnings) {

        // then
        expect(events).to.eql([
          { type: 'add', semantic: 'Process_1', di: 'BPMNPlane_1', diagramElement: 'Process_1' },
          { type: 'add', semantic: 'Task_1', di: '_BPMNShape_Task_2', diagramElement: 'Task_1' },
          { type: 'add', semantic: 'Task_2', di: '_BPMNShape_Task_3', diagramElement: 'Task_2' },
          { type: 'add', semantic: 'BoundaryEvent_1', di: '_BPMNShape_BoundaryEvent_2', diagramElement: 'BoundaryEvent_1' },
          { type: 'add', semantic: 'SequenceFlow_1', di: 'BPMNEdge_SequenceFlow_1', diagramElement: 'SequenceFlow_1' }
        ]);

        done(err);
      });
    });

  });


  describe('forgiveness', function() {

    it('should import invalid flowElement', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/error/invalid-flow-element.bpmn');

      // when
      runImport(diagram, xml, function(err, warnings) {

        expect(warnings.length).to.equal(0);

        done(err);
      });
    });


    it('should import multiple DIs', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/error/multiple-dis.bpmn');

      // when
      runImport(diagram, xml, function(err, warnings) {

        var expectedMessage =
          'multiple DI elements defined for <bpmn:InclusiveGateway id="InclusiveGateway_1" />';

        expect(warnings.length).to.equal(1);
        expect(warnings[0].message).to.equal(expectedMessage);

        done(err);
      });
    });


    it('should extend attributes with default value', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/default-attrs.bpmn');

      // when
      runImport(diagram, xml, function(err, warnings) {

        var elementRegistry = diagram.get('elementRegistry');

        var element = elementRegistry.get('GATEWAY_1');

        expect(element.businessObject.eventGatewayType).to.equal('Exclusive');

        done();
      });
    });


    describe('boundary events', function() {

      it('should handle missing attachToRef', function(done) {

        // given
        var xml = require('../../fixtures/bpmn/import/error/boundaryEvent-missingAttachToRef.bpmn');

        // when
        runImport(diagram, xml, function(err, warnings) {

          // then
          expect(warnings.length).to.eql(2);

          expect(warnings[0].message).to.eql('missing <bpmn:BoundaryEvent id="BoundaryEvent_1" />#attachedToRef');
          expect(warnings[1].message).to.eql('element <bpmn:BoundaryEvent id="BoundaryEvent_1" /> referenced by <bpmn:SequenceFlow id="SequenceFlow_1" />#sourceRef not yet drawn');

          done(err);
        });
      });


      it('should handle invalid attachToRef', function(done) {

        // given
        var xml = require('../../fixtures/bpmn/import/error/boundaryEvent-invalidAttachToRef.bpmn');

        // when
        runImport(diagram, xml, function(err, warnings) {

          // then
          expect(warnings.length).to.eql(2);

          expect(warnings[0].message).to.eql('missing <bpmn:BoundaryEvent id="BoundaryEvent_1" />#attachedToRef');
          expect(warnings[1].message).to.eql('element <bpmn:BoundaryEvent id="BoundaryEvent_1" /> referenced by <bpmn:SequenceFlow id="SequenceFlow_1" />#sourceRef not yet drawn');

          done(err);
        });
      });

    });

  });


  describe('integration', function() {

    it('should import dangling process message flows', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/error/dangling-process-message-flow.bpmn');

      // when
      runImport(diagram, xml, function(err, warnings) {

        // then
        expect(warnings.length).to.equal(0);

        expect(diagram.get('elementRegistry').get('_b467921a-ef7b-44c5-bf78-fd624c400d17')).to.exist;
        expect(diagram.get('elementRegistry').get('_c311cc87-677e-47a4-bdb1-8744c4ec3147')).to.exist;

        done(err);
      });
    });

  });


  describe('hiding', function() {

    it('should hide shapes and connections inside of collapsed subprocess', function(done) {

      // given
      var xml = require('../../fixtures/bpmn/import/collapsed/processWithChildren.bpmn');

      // when
      runImport(diagram, xml, function(err, warnings) {

        var elementRegistry = diagram.get('elementRegistry');

        var children = elementRegistry.get('SubProcess_1').children;
        var visible = find(children, function(child) {
          return !child.hidden;
        });

        // then
        expect(visible).to.be.undefined;

        done(err);
      });

    });

  });

});



////////// helpers /////////////////////////////////////

function expectChildren(diagram, parent, children) {

  return diagram.invoke(function(elementRegistry) {

    // verify model is consistent
    expect(parent.children).to.eql(children);

    // verify SVG is consistent
    var parentGfx = elementRegistry.getGraphics(parent);

    var expectedChildrenGfx = children.map(function(c) {
      return elementRegistry.getGraphics(c);
    });

    var childrenContainerGfx =
      domMatches(parentGfx, '[data-element-id="Process_1"]')
        ? parentGfx
        : getChildrenGfx(parentGfx);

    var existingChildrenGfx = Array.prototype.map.call(childrenContainerGfx.childNodes, function(c) {
      return c.querySelector('.djs-element');
    });

    expect(existingChildrenGfx).to.eql(expectedChildrenGfx);
  });

}