/* <copyright>
Copyright (c) 2012, Motorola Mobility LLC.
All Rights Reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

* Neither the name of Motorola Mobility LLC nor the names of its
  contributors may be used to endorse or promote products derived from this
  software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
</copyright> */

/**
@requires montage/core/core
@requires montage/ui/component
*/
var Montage = require("montage/core/core").Montage,
    Component = require("montage/ui/component").Component;

exports.BindingView = Montage.create(Component, {
    //private Properties
    _canvas: { value:null },
    _context : { value: null },
    _targetedElement: {value: null},
    componentsList: { value: {} },

    hudRepeater: { value: null },

    //Public Properties
    _width :{ value: 0 },
    width: {
        get:function() {
            return this._width;
        },
        set: function(val) {
            if(this._width !== val) {
                this._width = val;
                this.needsDraw = true;
            }
        }
    },

    _height :{  value: 0 },
    height: {
        get:function() {
            return this._height;
        },
        set: function(val) {
            if(this._height !== val) {
                this._height = val;
                this.needsDraw = true;
            }
        }
    },

    _connectionElementStart: { value: null },
    connectionElementStart: {
        get: function() {
            return this._connectionElementStart;
        },
        set: function(val) {
            this._connectionElementStart = val;
        }
    },

    _connectionElementEnd: { value: null },
    connectionElementEnd: {
        get: function() {
            return this._connectionElementEnd;
        },
        set: function(val) {
            this._connectionElementEnd = val;
        }
    },

    _connectionPropertyStart: { value: null },
    connectionPropertyStart: {
        get: function() {
            return this._connectionPropertyStart;
        },
        set: function(val) {
            this._connectionPropertyStart = val;
        }
    },

    _connectionPropertyEnd: { value: null },
    connectionPropertyEnd: {
        get: function() {
            return this._connectionPropertyEnd;
        },
        set: function(val) {
            this._connectionPropertyEnd = val;
        }
    },

    _boundComponents: { value: [] },
    boundComponents: {
        get: function() {
            return this._boundComponents;
        },
        set: function(val) {
            this._boundComponents = val;
        }
    },

    _selectedElement: { value: null },
    selectedElement: {
        get: function() {
            return this._selectedElement;
        },
        set: function(val) {
            this.boundComponents = [];
            if(this._selectedElement !== val) {
                this.clearCanvas();
                this._selectedElement = val;
            if(this._selectedElement !== null) {
                this.application.ninja.objectsController.currentObject = this._selectedElement.controller;
                if (this._selectedElement !== null) {
                    this.boundComponents.push(this._selectedElement);
                }
            }
                this.needsDraw = true;
            }
        }
    },

    handleShowBinding: {
        value: function(bindingMeta) {
            if(bindingMeta === null) return;
            for(var j=0; j< bindingMeta.length; j++) {
                var bindingExists = false;
                for(var i =0; i < this.boundComponents; i++) {
                    if(this.boundComponents[i] === bindingMeta[j].boundObject) {
                        bindingExists = true;
                    }
                }
                if(!bindingExists) {
                    //this.boundComponents.push(bindingMeta[j].boundObject);
                }
            }
        }
    },

    _nonVisualComponents: { value:[] },
    nonVisualComponents: {
        get: function() {
            return this._nonVisualComponents;
        },
        set: function(val) {
            this._nonVisualComponents = val;
        }
    },

    bindingViewCanvas: {
        get: function() {
            return this._bindingViewCanvas;
        },
        set: function(val) {
            this._bindingViewCanvas = val;
        }
    },

    //Methods
    canvas: {
        get: function() {
            return this._canvas;
        },
        set: function(val) {
            this._canvas = val;
        }
    },

    //Montage Draw Cycle
    prepareForDraw: {
        value: function() {
            this._canvas = this.application.ninja.stage.drawingCanvas;
            this._context = this.application.ninja.stage.drawingCanvas.getContext('2d');
            this.application.ninja.stage._iframeContainer.addEventListener("scroll", this, false);
            this.element.addEventListener("mousedown", this, false);
            this.element.addEventListener("mousemove", this, false);

            Object.defineBinding(this, 'currentDocument', {
                boundObject : this.application.ninja,
                boundObjectPropertyPath : "documentList.selectedObjects.0",
                oneway: true
            });

        }
    },

    _currentDocument : { value: null },
    currentDocument : {
        get : function() { return this._currentDocument; },
        set : function(value) {
            if(value === this._currentDocument) { return; }


            this._currentDocument = value;
            if(value) {
                this.hide = (value.currentView === 'code');
            }

            this.needsDraw = true;
        }
    },

    _hide : { value: true },
    hide : {
        get : function() { return this._hide; },
        set : function(value) {
            if(value === this._hide) { return; }

            this._hide = value;

            this.needsDraw = true;
        }
    },

    draw: {
        value: function() {

            if(this.hide) {
                this.element.style.setProperty('display', 'none');
            } else {
                this.element.style.removeProperty('display');
                this.element.style.width = this.width + "px";
                this.element.style.height = this.height + "px";
                if(this._selectedElement !== null && typeof(this._selectedElement) !== "undefined") {
                    this.canvas.width  = this.application.ninja.stage.drawingCanvas.offsetWidth;
                    this.canvas.height = this.application.ninja.stage.drawingCanvas.offsetHeight;
                    this.clearCanvas();
                    for(var i= 0; i < this.hudRepeater.childComponents.length; i++) {
                        this.drawLine(this.hudRepeater.objects[i].offsetLeft,this.hudRepeater.objects[i].offsetTop, this.hudRepeater.childComponents[i].element.offsetLeft +1, this.hudRepeater.childComponents[i].element.offsetTop +1, "#CCC", 2);
                    }
                    if(this._isDrawingConnection) {
                        if (this.hudRepeater.childComponents.length > 1) {
                            // Make things disappear
                        }
                        this.drawLine(this._currentMousePosition.x,this._currentMousePosition.y,this._connectionPositionStart.x,this._connectionPositionStart.y,"#5e9eff", 4);
                    }
                } else {
                    this.bindables = [];
                    this.clearCanvas();
                }

                if(this.mouseOverHud && !this._isDrawingConnection) {
                    if(!this.element.classList.contains("mousedOverHud")) { this.element.classList.add("mousedOverHud"); }
                } else {
                    if(this.element.classList.contains("mousedOverHud")) { this.element.classList.remove("mousedOverHud"); }
                }
            }

        }
    },

    drawLine: {
        value: function(fromX,fromY,toX,toY, color, width) {
            if(width === null) width = 1;
            if (color === null) color = "#CCC";
            this._context.lineWidth = width; // Set Line Thickness
            this._context.lineCap = "round";
            this._context.strokeStyle = color; // Set Color
            this._context.beginPath(); // Start Drawing Line
            this._context.moveTo(fromX, fromY);
            this._context.lineTo(toX, toY);
            this._context.stroke();
        }
    },

    clearCanvas: {
        value: function() {
            this._context.clearRect(0,0,this._canvas.offsetWidth,this._canvas.offsetHeight);
        }
    },

    ///////////////////////////////////////////////////////
    // Events & Functions to draw user selected options //
    /////////////////////////////////////////////////////

    // When a user selects a valid option this value will be switched to true and canvas
    // will draw a line following the mouse and the start position
    _isDrawingConnection: {
        value: false
    },

    // When isDrawingConnection is set true this is the beginning position for the draw line
    _connectionPositionStart: {
        value: {x: 0, y:0}
    },

    // When isDrawingConnection is set true this is the end point for the draw line
    _currentMousePosition: {
        value: {x: 0, y:0}
    },

    objectsTray: {
        value:null
    },

    getOffStageIcon : {
        value: function(object) {
            var index = this.objectsTray.offStageObjectsController.organizedObjects.indexOf(object);

            return this.objectsTray.iconsRepetition.childComponents[index];
        }
    },


    // When mouse pointer is on a hud this value will be set to true
    _mouseOverHud: { value: false },
    mouseOverHud: {
        get: function() {
            return this._mouseOverHud;
        },
        set: function(val) {
            if(this._mouseOverHud !== val) {
                this._mouseOverHud = val;
                this.needsDraw = true;
            }
        }
    },



    handleMousemove: {
        value: function(e) {
            var mousePoint = webkitConvertPointFromPageToNode(this.element, new WebKitPoint(e.pageX, e.pageY));
            var overHud = false;
            this.hudRepeater.childComponents.forEach(function(obj) {
                if(obj.x < mousePoint.x && (obj.x + obj.element.offsetWidth) > mousePoint.x) {
                    if(obj.y < mousePoint.y && (obj.y + obj.element.offsetHeight) > mousePoint.y) {
                        overHud = true;
                        if(this._isDrawingConnection) {
                            obj.isOverScroller(e);
                        }
                    }
                }
            }.bind(this));
            if(typeof (this.objectsTray.element) !== "undefined") {
                if (this.objectsTray.element.offsetLeft < mousePoint.x && (this.objectsTray.element.offsetLeft + this.objectsTray.element.offsetWidth) > mousePoint.x ) {
                    if(this.objectsTray.element.parentElement.offsetTop < mousePoint.y && (this.objectsTray.element.parentElement.offsetTop + this.objectsTray.element.offsetHeight) > mousePoint.y) {
                        overHud = true;
                    }
                }
            }
            this.mouseOverHud = overHud;
            if(this._isDrawingConnection && !overHud) {
                //NOTE : Continue This content. mouse over select
                var obj = this.application.ninja.stage.getElement(event, true);
                if (obj && obj !== this.selectedElement)
                {
                    if (!obj.controller || obj === null)
                    {
                        if(this._targetedElement)
                        {
                            this._targetedElement.classList.remove("active-element-outline");
                            this.boundComponents.pop();
                            this._targetedElement = null;
                        }
                    }
                    else
                    {
                        if (obj !== this._targetedElement)
                        {
                            if(this._targetedElement)
                            {
                                this._targetedElement.classList.remove("active-element-outline");
                                this.boundComponents.pop();
                            }
                            this._targetedElement = obj;
                            this._targetedElement.classList.add("active-element-outline");
                            this.boundComponents.push(this._targetedElement);
                        }
                    }
                }
            }
            if(this._isDrawingConnection) {
                this._currentMousePosition = mousePoint;
                this.needsDraw = true;
            }
        }
    },


    handleMouseup: {
        value: function(e) {
            window.removeEventListener("mouseup", this);
            this.element.style.zIndex = "12";
            var nodeEl = document.elementFromPoint(e.pageX, e.pageY);
            this.element.style.zIndex = null;
            if(nodeEl.classList.contains("connectorBubble")) {
//            var mouseUpPoint = new WebKitPoint(e.pageX, e.pageY);
//            var nodeEl = new webkitConvertPointFromPageToNode(this.element, mouseUpPoint);
                //debugger;
            this.connectionElementEnd = nodeEl.parentElement.controller.parentComponent.parentComponent.userElement.controller;
            this.connectionPropertyEnd = nodeEl.parentElement.controller.title;
                this.application.ninja.objectsController.addBinding({
                    sourceObject: this.connectionElementStart,
                    sourceObjectPropertyPath: this.connectionPropertyStart,
                    boundObject: this.connectionElementEnd,
                    boundObjectPropertyPath: this.connectionPropertyEnd
                });
            }
            if(this._targetedElement !==null) {
                this.boundComponents.pop();
                this._targetedElement.classList.remove("active-element-outline");
                this._targetedElement = null;
            }
            this._isDrawingConnection = false;
            this.needsDraw = true;
        }
    },

    handleMousedown: {
        value: function(e) {
            // We are looking for a mouse down on an option to start the connection visual
            if(e._event.target.classList.contains("connectorBubble")) {
                this.connectionElementStart = e._event.target.parentElement.controller.parentComponent.parentComponent.userElement.controller;
                this.connectionPropertyStart = e._event.target.parentElement.controller.title;
                this._isDrawingConnection = true;
                this._connectionPositionStart = webkitConvertPointFromPageToNode(this.element, new WebKitPoint(e.pageX, e.pageY));

                window.addEventListener("mouseup", this);
            }
        }
    },

    handleScroll: {
        value: function() {
            this.needsDraw = true;
        }
    },

    didDraw: {
        value: function() {

        }
    }

});