/* <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> */

var Montage = require("montage/core/core").Montage,
    Component = require("montage/ui/component").Component,
    Keyboard = require("js/mediators/keyboard-mediator").Keyboard;

exports.StylesViewDelegate = Montage.create(Component, {

    ruleListContainer: {
        value: null,
        serializable: true
    },

    newClassPrefix      : { value: "new-class" },
    elementOutlineClass : { value: "nj-element-highlight" },

    stylesController : {
        get: function() {
            return this.application.ninja.stylesController;
        },
        set: function(){
            return;
        }
    },

    ///// Selector Actions
    //// -------------------------------------

    ///// Show the targeted elements in the document by applying a class
    ///// temporarily
    handleSelectorHover : {
        value: function(selector, direction) {
            if(!selector) { return false; }

            var elements = this.stylesController.currentDocument.model.views.design.document.querySelectorAll(selector),
                method = (direction === "out") ? "remove" : "add";

            Array.prototype.slice.call(elements).forEach(function(el) {
                el.classList[method](this.elementOutlineClass);
            }, this);
        }
    },

    ///// Apply new selector to the rule
    //// Verify that it applies to the selected elements
    //// Remove rule if the selector is deleted
    handleSelectorChange : {
        value: function(rule, newSelector, ruleComponent) {
            if(newSelector === "") {
                ruleComponent.parentComponent.removeRule(ruleComponent);
                this.stylesController.deleteRule(rule);
                ///// Remove the hover style
                this.handleSelectorHover(rule.selectorText, 'out');
                this._dispatchChange();
                return false;
            }

            if(ruleComponent.addClassNameOnChange) {
                var lastClass = this._getClassNameFromSelector(newSelector);

                if(lastClass) {
                    ///// Add the generated class to each element in selection
                    ///// and check whether it applies to the element
                    this.ruleListContainer.displayedList.selection.forEach(function(el) {
                        this.stylesController.addClass(el, lastClass);
                    },this);
                }
                ruleComponent.addClassNameOnChange = false;
            }

            rule.selectorText = newSelector;

            ruleComponent.applied = this.ruleListContainer.displayedList.selection.every(function(el) {
                return this._doesSelectorTargetElement(newSelector, el);
            }, this);

            this._dispatchChange();
        }
    },

    handleSelectorStop : {
        value: function(rule, newSelector, ruleComponent) {
            ruleComponent.declarationComponent.repetition.childComponents[0].propertyField.start()
        }
    },

    _getClassNameFromSelector : {
        value: function(selectorText) {
            var results = /.*\.([A-Za-z0-9_-]+)\:?[A-Za-z0-9_"=-]*$/.exec(selectorText);
            return (results) ? results[1] : null;
        }
    },

    ///// Returns true if the passed-in selector targets the passed-in element
    _doesSelectorTargetElement : {
        value: function doesSelectorTargetElement(selector, element) {
            var doc = element.ownerDocument,
                matchingEls = Array.prototype.slice.call(doc.querySelectorAll(selector));
            return matchingEls.indexOf(element) !== -1;
        }
    },

    ///// Style event handlers
    //// -------------------------------------

    ///// Enable/Disable Style when checkbox is clicked
    handleStyleToggle : {
        value: function(rule, enable, style) {
            if(enable) {
                this.stylesController.setStyle(rule, style.propertyText, style.browserValue, style.priority);
            } else {
                this.stylesController.deleteStyle(rule, style.propertyText);
            }

            this._dispatchChange();
        }
    },

    handlePropertyStop: {
        value: function(e, style) {
            var key, nextFocus;

            if(e._event.detail.type === 'keydown' && !style.deleting) {
                key = e._event.detail.keyCode;

                if(key === Keyboard.ENTER || key === Keyboard.TAB) {
                    e._event.detail.preventDefault();

                    if(e._event.detail.shiftKey) {
                        nextFocus = style.getSiblingStyle('prev') || style.getSiblingStyle('last');
                        nextFocus.valueField.start();
                    } else {
                        style.valueField.start();
                    }
                }
            }
        }
    },
    handleValueStop: {
        value: function(e, style) {
            var key, nextFocus;

            if(e._event.detail.type === 'keydown' && !style.deleting) {
                key = e._event.detail.keyCode;

                if(key === Keyboard.ENTER || key === Keyboard.TAB) {
                    e._event.detail.preventDefault();

                    if(e._event.detail.shiftKey) {
                        style.propertyField.start();
                    } else {

                        nextFocus = style.getSiblingStyle('next');
                        if(nextFocus) {
                            nextFocus.propertyField.start();
                        } else if(style.dirty) {
                            style.parentComponent.parentComponent.addNewStyle(true);
                            style.editingNewStyle = false;
                            setTimeout(function() {
                                style.getSiblingStyle('next').propertyField.start();
                            }, 50);
                        }
                    }
                }
            }
        }
    },
    handlePropertyChange : {
        value: function(rule, property, value, oldProperty, style) {
            var declaration = style.parentComponent.parentComponent,
                browserValue;

            if(style.editingNewStyle) {
                if(property === '') {
                    style.propertyField.value = 'property';
                    style.propertyField.isDirty = false;
                    style.editingNewStyle = false;
                }
                return false;
            }

            ///// Remove old property
            this.stylesController.deleteStyle(rule, oldProperty);

            if(property === '') {
                style.deleting = true;
                declaration.removeStyle(style.source);
                this._dispatchChange(oldProperty);
                return false;
            }

            // now add new property
            browserValue = this.stylesController.setStyle(rule, property, value);

            //// Update the css text so it knows when to update
            declaration.cssText = rule.style.cssText;

            ///// Mark style as invalid if the browser doesn't accept it
            style.invalid = (browserValue === null);

            this._dispatchChange(property, browserValue);
        }
    },
    handleValueChange : {
        value: function(rule, property, value, style) {
            var declaration = style.parentComponent.parentComponent,
                browserValue, units;

            if(value === '') {
                ///// Remove old property
                style.deleting = true;
                this.stylesController.deleteStyle(rule, property);
                declaration.removeStyle(style.source);

                //// Update the css text so it knows when to update
                declaration.cssText = rule.style.cssText;

                this._dispatchChange(property, browserValue);
                return false;
            }

            ///// update value
            browserValue = this.stylesController.setStyle(rule, property, value);
            style.browserValue = browserValue;

            //// Update the css text so it knows when to update
            declaration.cssText = rule.style.cssText;

            ///// Mark style as invalid if the browser doesn't accept it
            style.invalid = (browserValue === null);

            this._dispatchChange(property, browserValue);
        }
    },

    handlePaste : {
        value: function(e) {
//            var text = document.execCommand('insertHTML', null, e._event.clipboardData.getData("Text")).trim();
//
//            if(text.matches(/([a-zA-Z-]+:[a-zA-Z-]+){,1}/)) {
//
//            }
        }
    },

    /// Toolbar Button Actions
    /// -----------------------

    ///// Add rule button action
    handleAddAction : {
        value: function(e) {
            var selector,
                newRule,
                applies = true;

            ///// Get selection prefix
            if(this.ruleListContainer.displayedList.selection.length > 1) {
                selector = this.stylesController.generateClassName(null, true);
            } else {
                selector = this.stylesController.generateClassName(this.newClassPrefix);
            }

            ///// Create the rule with generated selector
            newRule = this.application.ninja.stylesController.addRule('.'+selector, ' { }');

            ///// Add rule directly to the rule list
            this.ruleListContainer.displayedList.component.addRule(newRule, null, applies, function(ruleComponent) {
                var rC = ruleComponent;

                // TODO: use stop event to apply class to element
                rC.addClassNameOnChange = true;

                setTimeout(function() {
                    rC.selectorField.start();
                    rC.selectorField._preEditValue = "";
                },50);

            });

        }
    },

    ///// Show/hide computed style sub panel
    handleComputedAction : {
        value: function(e) {
            var container = this.ownerComponent,
                panelToShow = (container.contentPanel === "computed") ? "rules" : "computed";

            ///// Handle showing and hiding of the add button
            if(panelToShow === "computed") {
                container.toolbar.hideButton('add');
            } else {
                container.toolbar.showButton('add');
            }

            container.contentPanel = panelToShow;
            container.handleSelectionChange();
        }
    },

    ///// Utilities
    //// -------------------------------------

    _dispatchChange : {
        value: function(property, value) {
            this.application.ninja.stage.updatedStage = true;
            NJevent('elementChange', {
                type : 'cssChange',
                data: {
                    "prop": property,
                    "value": value,
                    "els": this.application.ninja.selectedElements
                },
                redraw: null
            });
        }
    }
});