/**
 * Typing mode plugin by Luan Fonseca
 * December 2014
 * https://github.com/brianreavis/selectize.js/blob/5d81539d677e8c2411215a1fb81789a8006c77f2/src/plugins/typing_mode/plugin.js#L1
 *
 * Modified by Jess Mann
 * June 2017
 *
 * Selectize version 0.12.4
 */
Selectize.define('typing_mode', function(options) {
        var self = this;

        this.setup = (function() {
                var original = self.setup;
                self.updating = false;

                return function() {
                        original.apply(this, arguments);

                        this.on('dropdown_open', function() {
                                self.previousValue = self.getValue();
                                var option = self.getOption(self.previousValue);

                                /**
                                 * Two styles: 
                                 *     1) usePlaceholder gives an immediately blank field to type into
                                 *     2) default shows the text and allows user to edit last selection
                                 */
                                if (self.settings.usePlaceholder) {
                                        self.$control_input.attr('placeholder', option.text().trim());
                                } else {
                                        self.$control_input.attr('value', option.text().trim());
                                }

                                self.$control_input.css({
                                        opacity: '1',
                                        width: '100%',
                                        position: 'relative'
                                });
                                self.$control.find('.item').hide();

                                self.items = [];
                                self.setCaret(0);
                        });

                        this.$control_input.on('blur', function() {
                                self.$control.find('.item').show();

                                /**
                                 * I played with testing self.settings.allowEmptyOption
                                 *     before reverting to the previous value,
                                 *     but that doesn't seem to be intuitive behavior.
                                 *
                                 * Use the current value, or, if empty, set to the previous value
                                 */
                                var value = self.getValue() || self.previousValue;

                                /**
                                 * Avoid infinite loop. self.setValue calls blur() again
                                 *     even if we pass true to the second param.
                                 */
                                if (self.updating)
                                        return;

                                self.updating = true;
                                self.setValue(value);
                                self.updating = false;
                        });
                };
        })();
});