/* global sinon */

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

import { forEach } from 'min-dash';

import copyPasteModule from 'lib/features/copy-paste';
import selectionModule from 'lib/features/selection';
import modelingModule from 'lib/features/modeling';
import rulesModule from './rules';


describe('features/copy-paste', function() {

  beforeEach(bootstrapDiagram({
    modules: [
      rulesModule,
      modelingModule,
      copyPasteModule,
      selectionModule
    ]
  }));


  function toObjectBranch(branch) {
    var newBranch = {};

    if (!branch) {
      return false;
    }

    forEach(branch, function(elem) {
      newBranch[elem.id] = elem;
    });

    return newBranch;
  }

  describe('basics', function() {

    var rootShape,
        parentShape,
        parentShape2,
        host,
        attacher,
        childShape,
        childShape2,
        connection;


    beforeEach(inject(function(elementFactory, canvas, modeling) {

      rootShape = elementFactory.createRoot({
        id: 'root'
      });

      canvas.setRootElement(rootShape);

      parentShape = elementFactory.createShape({
        id: 'parent',
        x: 600, y: 200,
        width: 600, height: 300
      });

      canvas.addShape(parentShape, rootShape);

      parentShape2 = elementFactory.createShape({
        id: 'parent2',
        x: 90, y: 15,
        width: 425, height: 300
      });

      canvas.addShape(parentShape2, rootShape);

      host = elementFactory.createShape({
        id: 'host',
        x: 300, y: 50,
        width: 100, height: 100
      });

      canvas.addShape(host, parentShape2);

      attacher = elementFactory.createShape({
        id: 'attacher',
        x: 375, y: 25,
        width: 50, height: 50
      });

      canvas.addShape(attacher, parentShape2);

      modeling.updateAttachment(attacher, host);

      childShape = elementFactory.createShape({
        id: 'childShape',
        x: 110, y: 110,
        width: 100, height: 100
      });

      canvas.addShape(childShape, parentShape2);

      childShape2 = elementFactory.createShape({
        id: 'childShape2',
        x: 400, y: 200,
        width: 100, height: 100
      });

      canvas.addShape(childShape2, parentShape2);

      connection = elementFactory.createConnection({
        id: 'connection',
        waypoints: [
          { x: 160, y: 160 },
          { x: 450, y: 250 }
        ],
        source: childShape,
        target: childShape2
      });

      canvas.addConnection(connection, parentShape2);
    }));


    describe('events', function() {

      it('should fire <elements.copy> when copying elements', inject(function(eventBus, clipboard, copyPaste) {

        eventBus.on('elements.copy', function(event) {
          var context = event.context,
              tree = context.tree;

          // then
          expect(toObjectBranch(tree[0])).to.have.keys('parent2');

          expect(toObjectBranch(tree[1])).to.have.keys('host', 'childShape', 'childShape2', 'connection');
        });

        // when
        copyPaste.copy([ parentShape2 ]);
      }));


      it('should have an empty clipboard on <elements.copy> when no element was allowed to be copied',
        inject(function(eventBus, clipboard, copyPaste) {

          // given
          var listener = sinon.spy();

          eventBus.on('elements.copy', listener);

          // when
          copyPaste.copy(attacher);

          // then
          expect(listener).to.have.been.called;
          expect(clipboard.isEmpty()).to.be.true;
        })
      );


      it('should fire "elements.copied" after elements have been copied',
        inject(function(eventBus, clipboard, copyPaste) {

          var called = false;

          eventBus.on('elements.copied', function(event) {
            var context = event.context,
                tree = context.tree;

            // then
            expect(clipboard.isEmpty()).to.be.false;
            expect(clipboard.get()).to.eql(tree);

            called = true;
          });

          // when
          copyPaste.copy([ parentShape2 ]);
          expect(called).to.be.true;
        })
      );

    });


    describe('copy', function() {

      it('should return copied elements', inject(function(copyPaste, clipboard) {

        // when
        var copyResult = copyPaste.copy([ parentShape2 ]);

        // then
        expect(copyResult).to.exist;

        expect(copyResult).to.equal(clipboard.get());
      }));


      it('should copy parent + children, when element is selected', inject(function(copyPaste, clipboard) {
        // when
        copyPaste.copy([ parentShape2 ]);

        var tree = clipboard.get();

        // then
        expect(toObjectBranch(tree[0])).to.have.keys('parent2');

        expect(toObjectBranch(tree[1])).to.have.keys('host', 'childShape', 'childShape2', 'connection');
      }));


      it('should copy attachers + connections', inject(function(copyPaste, clipboard) {
        // when
        copyPaste.copy([ host, childShape, childShape2 ]);

        var tree = clipboard.get();

        // then
        expect(toObjectBranch(tree[0])).to.have.keys('host', 'childShape', 'childShape2', 'connection');
      }));


      it('should not copy connection without target or source', inject(function(copyPaste, clipboard) {
        var tree;

        // when
        copyPaste.copy([ childShape2, connection ]);

        tree = clipboard.get();

        // then
        expect(toObjectBranch(tree[0])).not.to.have.keys('connection');
        expect(tree[1]).not.to.exist;

        // when
        copyPaste.copy([ childShape, connection ]);

        tree = clipboard.get();

        // then
        expect(toObjectBranch(tree[0])).not.to.have.keys('connection');
        expect(tree[1]).not.to.exist;
      }));


      it('should not copy attacher based on rules', inject(function(copyPaste, clipboard) {
        // given
        copyPaste.copy(attacher);

        var tree = clipboard.get();

        // then
        expect(tree).not.to.exist;
      }));

    });


    describe('paste', function() {

      it('should paste', inject(function(copyPaste) {
        // when
        copyPaste.copy([ host, childShape ]);

        copyPaste.paste({
          element: parentShape,
          point: {
            x: 900,
            y: 350
          }
        });

        // then
        expect(parentShape.children).to.have.length(2);
      }));


      describe('rule integration', function() {

        it('should exclude element based on rule', inject(function(copyPaste) {
          // given
          copyPaste.copy([ childShape, childShape2 ]);

          copyPaste.paste({
            element: parentShape,
            point: {
              x: 900,
              y: 350
            }
          });

          // then
          expect(parentShape.children).to.have.length(2);
        }));


        it('should reject overall paste based on rule', inject(function(copyPaste, clipboard, eventBus) {
          // given
          var listener = sinon.spy();

          eventBus.on('elements.paste.rejected', listener);

          // when
          copyPaste.copy([ childShape, childShape2 ]);

          copyPaste.paste({
            element: parentShape2,
            point: {
              x: 900,
              y: 350
            }
          });

          // then
          expect(listener).to.have.been.called;
        }));

      });


      describe('post-paste selection', function() {

        it('should select top-level element', inject(function(copyPaste, clipboard, selection) {
          var selectedElement;

          // when
          copyPaste.copy([ parentShape2 ]);

          copyPaste.paste({
            element: parentShape,
            point: {
              x: 900,
              y: 350
            }
          });

          selectedElement = selection.get();

          // then
          expect(selectedElement).to.have.length(1);
        }));


        it('should multiple top-level elements', inject(function(copyPaste, clipboard, selection) {
          var selectedElements;

          // when
          copyPaste.copy([ childShape, childShape2 ]);

          copyPaste.paste({
            element: parentShape,
            point: {
              x: 900,
              y: 350
            }
          });

          selectedElements = selection.get();

          // then
          expect(selectedElements).to.have.length(2);
        }));

      });


      describe('hints', function() {

        it('should create non-root elements with { root: false } hint', inject(function(copyPaste, eventBus) {

          // given
          var listener = sinon.spy(function(event) {
            var context = event.context;

            expect(context.hints).to.exist;

            if (context.parent === parentShape) {
              expect(context.hints.root).not.to.exist;
            } else {
              expect(context.hints.root).to.be.false;
            }
          });

          // when
          eventBus.on('commandStack.shape.create.preExecute', listener);

          copyPaste.copy([ parentShape2, childShape2 ]);

          copyPaste.paste({
            element: parentShape,
            point: {
              x: 900,
              y: 350
            }
          });

          // then
          expect(listener).to.have.been.called;
        }));

      });

    });

  });


  describe('#createTree', function() {

    var sB = { id: 'b', parent: { id: 'a' }, x: 0, y: 0, width: 100, height: 100 },
        sC = { id: 'c', parent: sB, x: 0, y: 0, width: 100, height: 100 },
        sD = { id: 'd', parent: sB, x: 0, y: 0, width: 100, height: 100 },
        sE = { id: 'e', parent: { id: 'y' }, x: 0, y: 0, width: 100, height: 100 },
        sF = { id: 'f', parent: sE, x: 0, y: 0, width: 100, height: 100 },
        sG = { id: 'g', parent: sF, x: 0, y: 0, width: 100, height: 100 },
        sW = { id: 'w', parent: { id: 'z' }, x: 0, y: 0, width: 100, height: 100 };

    var cA = { id: 'connA', parent: sB, source: sC, target: sD,
          waypoints: [ { x: 0, y: 0, original: { x: 50, y: 50 } } ] },
        cB = { id: 'connB', parent: { id: 'p' }, source: sC, target: sW,
          waypoints: [ { x: 0, y: 0 } ] };

    var host = { id: 'host', parent: { id: 't' }, x: 0, y: 0, width: 100, height: 100 },
        attacher = { id: 'attacher', parent: { id: 't' }, x: 0, y: 0, width: 100, height: 100 };

    sB.children = [ sC, sD, cA ];
    sF.children = [ sG ];
    sE.children = [ sF ];

    sC.outgoing = cA;
    sD.incoming = cA;

    host.attachers = [ attacher ];
    attacher.host = host;


    it('should create tree of shapes', inject(function(copyPaste) {
      // when
      var tree = copyPaste.createTree([ sE, sF, sG ]);

      var branchZero = toObjectBranch(tree[0]),
          branchOne = toObjectBranch(tree[1]),
          branchTwo = toObjectBranch(tree[2]);

      // then
      expect(branchZero.e).to.exist;
      expect(branchZero.e.parent).to.equal('y');

      expect(branchOne.f).to.exist;
      expect(branchOne.f.parent).to.equal('e');

      expect(branchTwo.g).to.exist;
      expect(branchTwo.g.parent).to.equal('f');
    }));


    it('should create a tree of shapes and connections', inject(function(copyPaste) {
      // when
      var tree = copyPaste.createTree([ sB, sC, sD, sE, sF, sG, cA, cB ]);

      var branchZero = toObjectBranch(tree[0]),
          branchOne = toObjectBranch(tree[1]),
          branchTwo = toObjectBranch(tree[2]);

      // then
      expect(branchZero).to.have.keys('b', 'e');
      expect(branchOne).to.have.keys('c', 'd', 'f', 'connA');
      expect(branchTwo).to.have.keys('g');

      expect(branchOne).not.to.have.keys('connB');

      expect(branchOne.c.parent).to.equal('b');

      expect(branchOne.connA.source).to.equal('c');
      expect(branchOne.connA.target).to.equal('d');
    }));


    it('should create a tree of everything', inject(function(copyPaste) {
      // when
      var tree = copyPaste.createTree([ sB, sC, sD, sE, sF, sG, cA, cB, host ]);

      var branchZero = toObjectBranch(tree[0]),
          branchOne = toObjectBranch(tree[1]),
          branchTwo = toObjectBranch(tree[2]);

      // then
      expect(branchZero).to.have.keys('b', 'e', 'host');
      expect(branchOne).to.have.keys('c', 'd', 'f', 'connA');
      expect(branchTwo).to.have.keys('g');
    }));

  });

});