(function(jsGrid, $, undefined) {

    var Field = jsGrid.Field;

    function ControlField(config) {
        Field.call(this, config);
        this._configInitialized = false;
    }

    ControlField.prototype = new Field({
        css: "jsgrid-control-field",
        align: "center",
        width: 50,
        filtering: false,
        inserting: false,
        editing: false,
        sorting: false,

        buttonClass: "jsgrid-button",
        modeButtonClass: "jsgrid-mode-button",

        modeOnButtonClass: "jsgrid-mode-on-button",
        searchModeButtonClass: "jsgrid-search-mode-button",
        insertModeButtonClass: "jsgrid-insert-mode-button",
        editButtonClass: "jsgrid-edit-button",
        deleteButtonClass: "jsgrid-delete-button",
        searchButtonClass: "jsgrid-search-button",
        clearFilterButtonClass: "jsgrid-clear-filter-button",
        insertButtonClass: "jsgrid-insert-button",
        updateButtonClass: "jsgrid-update-button",
        cancelEditButtonClass: "jsgrid-cancel-edit-button",

        searchModeButtonTooltip: "Switch to searching",
        insertModeButtonTooltip: "Switch to inserting",
        editButtonTooltip: "Edit",
        deleteButtonTooltip: "Delete",
        searchButtonTooltip: "Search",
        clearFilterButtonTooltip: "Clear filter",
        insertButtonTooltip: "Insert",
        updateButtonTooltip: "Update",
        cancelEditButtonTooltip: "Cancel edit",

        editButton: true,
        deleteButton: true,
        clearFilterButton: true,
        modeSwitchButton: true,

        _initConfig: function() {
            this._hasFiltering = this._grid.filtering;
            this._hasInserting = this._grid.inserting;

            if(this._hasInserting && this.modeSwitchButton) {
                this._grid.inserting = false;
            }

            this._configInitialized = true;
        },

        headerTemplate: function() {
            if(!this._configInitialized) {
                this._initConfig();
            }

            var hasFiltering = this._hasFiltering;
            var hasInserting = this._hasInserting;

            if(!this.modeSwitchButton || (!hasFiltering && !hasInserting))
                return "";

            if(hasFiltering && !hasInserting)
                return this._createFilterSwitchButton();

            if(hasInserting && !hasFiltering)
                return this._createInsertSwitchButton();

            return this._createModeSwitchButton();
        },

        itemTemplate: function(value, item) {
            var $result = $([]);

            if(this.editButton) {
                $result = $result.add(this._createEditButton(item));
            }

            if(this.deleteButton) {
                $result = $result.add(this._createDeleteButton(item));
            }

            return $result;
        },

        filterTemplate: function() {
            var $result = this._createSearchButton();
            return this.clearFilterButton ? $result.add(this._createClearFilterButton()) : $result;
        },

        insertTemplate: function() {
            return this._createInsertButton();
        },

        editTemplate: function() {
            return this._createUpdateButton().add(this._createCancelEditButton());
        },

        _createFilterSwitchButton: function() {
            return this._createOnOffSwitchButton("filtering", this.searchModeButtonClass, true);
        },

        _createInsertSwitchButton: function() {
            return this._createOnOffSwitchButton("inserting", this.insertModeButtonClass, false);
        },

        _createOnOffSwitchButton: function(option, cssClass, isOnInitially) {
            var isOn = isOnInitially;

            var updateButtonState = $.proxy(function() {
                $button.toggleClass(this.modeOnButtonClass, isOn);
            }, this);

            var $button = this._createGridButton(this.modeButtonClass + " " + cssClass, "", function(grid) {
                isOn = !isOn;
                grid.option(option, isOn);
                updateButtonState();
            });

            updateButtonState();

            return $button;
        },

        _createModeSwitchButton: function() {
            var isInserting = false;

            var updateButtonState = $.proxy(function() {
                $button.attr("title", isInserting ? this.searchModeButtonTooltip : this.insertModeButtonTooltip)
                    .toggleClass(this.insertModeButtonClass, !isInserting)
                    .toggleClass(this.searchModeButtonClass, isInserting);
            }, this);

            var $button = this._createGridButton(this.modeButtonClass, "", function(grid) {
                isInserting = !isInserting;
                grid.option("inserting", isInserting);
                grid.option("filtering", !isInserting);
                updateButtonState();
            });

            updateButtonState();

            return $button;
        },

        _createEditButton: function(item) {
            return this._createGridButton(this.editButtonClass, this.editButtonTooltip, function(grid, e) {
                grid.editItem(item);
                e.stopPropagation();
            });
        },

        _createDeleteButton: function(item) {
            return this._createGridButton(this.deleteButtonClass, this.deleteButtonTooltip, function(grid, e) {
                grid.deleteItem(item);
                e.stopPropagation();
            });
        },

        _createSearchButton: function() {
            return this._createGridButton(this.searchButtonClass, this.searchButtonTooltip, function(grid) {
                grid.search();
            });
        },

        _createClearFilterButton: function() {
            return this._createGridButton(this.clearFilterButtonClass, this.clearFilterButtonTooltip, function(grid) {
                grid.clearFilter();
            });
        },

        _createInsertButton: function() {
            return this._createGridButton(this.insertButtonClass, this.insertButtonTooltip, function(grid) {
                grid.insertItem().done(function() {
                    grid.clearInsert();
                });
            });
        },

        _createUpdateButton: function() {
            return this._createGridButton(this.updateButtonClass, this.updateButtonTooltip, function(grid, e) {
                grid.updateItem();
                e.stopPropagation();
            });
        },

        _createCancelEditButton: function() {
            return this._createGridButton(this.cancelEditButtonClass, this.cancelEditButtonTooltip, function(grid, e) {
                grid.cancelEdit();
                e.stopPropagation();
            });
        },

        _createGridButton: function(cls, tooltip, clickHandler) {
            var grid = this._grid;

            return $("<input>").addClass(this.buttonClass)
                .addClass(cls)
                .attr({
                    type: "button",
                    title: tooltip
                })
                .on("click", function(e) {
                    clickHandler(grid, e);
                });
        },

        editValue: function() {
            return "";
        }

    });

    jsGrid.fields.control = jsGrid.ControlField = ControlField;

}(jsGrid, jQuery));