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/* <copyright>
 This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
 No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
 (c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
 </copyright> */

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

exports.StylesViewContainer = Montage.create(Component, {

    _currentDocument: {
        value : null
    },

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

            this._currentDocument = value;

            if(!value) {
                this.hasStyles = false;
                this.needsDraw = true;
            }
        }
    },

    contentController : {
        value: null
    },
    contentPanel : {
        value: 'rules'
    },
    _selectionNameLabelText : {
        value: null
    },
    selectionNameLabelText : {
        get: function() {
            return this._selectionNameLabelText;
        },
        set: function(value) {
            if(value === this._selectionNameLabelText) { return false; }

            this._selectionNameLabelText = value;

            this.needsDraw = true;
        }
    },
    _prevSelection : {
        value: null
    },
    prevSelection : {
        get: function() {
            return this._prevSelection;
        },
        set: function(value) {
            this._prevSelection = value;
        }
    },
    _hasStyles : {
        value: false
    },
    hasStyles : {
        get: function() {
            return this._hasStyles;
        },
        set: function(hasThem) {
            this._hasStyles = hasThem;
            //caller needs to set ndt
            //this.needsDraw = true;
        }
    },

    _getElementLabel : {
        value: function(el) {
            var id = '#'+el.id,
                className = '.'+Array.prototype.slice.call(el.classList).join('.'),
                nodeName = el.nodeName;

            if(id.length > 1) {
                return nodeName + id;
            } else if(className.length > 1) {
                return nodeName + className;
            }

            return nodeName;
        }
    },

    templateDidLoad : {
        value: function() {
            this.eventManager.addEventListener('styleSheetsReady', this, false);
            this.eventManager.addEventListener('elementChange', this, false);
        }
    },
    handleStyleSheetsReady: {
        value: function(e) {
            this.eventManager.addEventListener( "selectionChange", this, false);
        }
    },
    _copy : {
        value: function(array) {
            return array.map(function(item) { return item; });
        }
    },
    handleSelectionChange: {
        value: function(e) {
            var elements = this.application.ninja.selectedElements,
                elementsCopy = this._copy(elements);

            ///// Is selection identical? If so, do nothing.
            if(this._isSameArray(elements, this.prevSelection) && this.contentPanel === "rules") {
                return false;
            }

            // TODO: should selection always create new array
            // TODO: pushing to selection array makes prevSelection
            // TODO: invalid
            this.prevSelection = elementsCopy;

            if(elements.length === 0) {
                this.hasStyles = false;
                this.needsDraw = true;
                return false;
            } else if(elements.length === 1) {

                ///// update the selection status label with the label of the element
                this.selectionNameLabelText = this._getElementLabel(elements[0]);

                if(this.contentPanel === "rules") {
                    this.ruleListContainer.displayListForSelection(elementsCopy);
                } else {
                    this.computedStyleView.declaration = elements[0];
                }
                this.toolbar.showButton('computed');
            } else {
                this.toolbar.hideButton('computed');
                this.contentPanel = "rules";
                this.selectionNameLabelText = elements.length + " elements selected.";
                ///// find common rules
                this.ruleListContainer.displayListForSelection(elementsCopy);

            }

            this.hasStyles = true;
        }
    },
    handleElementChange : {
        value: function(e) {
            var elements = this.application.ninja.selectedElements;

            if(elements.length === 0) {
                return false;
            } else if(elements.length === 1) {
                if(this.contentPanel === "rules") {
                    if(e._event.detail.type !== 'cssChange') {
                        this.ruleListContainer.update();
                    }
                } else {
                    this.computedStyleView.declaration = elements[0];
                }
            } else {
                return false;
            }

        }
    },

    draw : {
        value: function() {
            if(this.hasStyles) {
                this.element.classList.remove('no-styles');
                //this.selectionNameLabel.classList.remove('no-styles');
                this.selectionName.element.classList.remove('no-styles');
            } else {
                this.element.classList.add('no-styles');
                //this.selectionNameLabel.classList.add('no-styles');
                this.selectionName.element.classList.add('no-styles');
            }
        }
    },

    _isSameArray : {
        value: function(left, right) {
            if(!left || !right) { return false; }
            if(left.length !== right.length) { return false; }

            return left.every(function(item, i) {
                return item === right[i];
            });
        }
    }
});