/* ===========================================================
 * Bootstrap: fileinput.js v3.1.3
 * http://jasny.github.com/bootstrap/javascript/#fileinput
 * ===========================================================
 * Copyright 2012-2014 Arnold Daniels
 *
 * Licensed under the Apache License, Version 2.0 (the "License")
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ========================================================== */

/*
 * uikit version
 * author tzd
*/

+function ($) { "use strict";

    var isIE = window.navigator.appName == 'Microsoft Internet Explorer';

    // FILEUPLOAD PUBLIC CLASS DEFINITION
    // =================================

    var Fileinput = function (element, options) {
        this.$element = $(element);

        this.$input = this.$element.find(':file');
        if (this.$input.length === 0) return;

        this.name = this.$input.attr('name') || options.name;

        this.$hidden = this.$element.find('input[type=hidden][name="' + this.name + '"]');
        if (this.$hidden.length === 0) {
            this.$hidden = $('<input type="hidden">').insertBefore(this.$input)
        }

        this.$preview = this.$element.find('.fileinput-preview');
        var height = this.$preview.css('height');
        if (this.$preview.css('display') !== 'inline' && height !== '0px' && height !== 'none') {
            this.$preview.css('line-height', height)
        }

        this.original = {
            exists: this.$element.hasClass('fileinput-exists'),
            preview: this.$preview.html(),
            hiddenVal: this.$hidden.val()
        };

        this.listen()
    };

    Fileinput.prototype.listen = function() {
        this.$input.on('change.uk.fileinput', $.proxy(this.change, this));
        $(this.$input[0].form).on('reset.uk.fileinput', $.proxy(this.reset, this));

        this.$element.find('[data-trigger="fileinput"]').on('click.uk.fileinput', $.proxy(this.trigger, this));
        this.$element.find('[data-dismiss="fileinput"]').on('click.uk.fileinput', $.proxy(this.clear, this))
    };

    Fileinput.prototype.change = function(e) {
        var files = e.target.files === undefined ? (e.target && e.target.value ? [{ name: e.target.value.replace(/^.+\\/, '')}] : []) : e.target.files;

        e.stopPropagation();

        if (files.length === 0) {
            this.clear();
            this.$element.trigger('clear.uk.fileinput');
            return
        }

        this.$hidden.val('');
        this.$hidden.attr('name', '');
        this.$input.attr('name', this.name);

        var file = files[0];

        if (this.$preview.length > 0 && (typeof file.type !== "undefined" ? file.type.match(/^image\/(gif|png|jpeg)$/) : file.name.match(/\.(gif|png|jpe?g)$/i)) && typeof FileReader !== "undefined") {
            var reader = new FileReader();
            var preview = this.$preview;
            var element = this.$element;

            reader.onload = function(re) {
                var $img = $('<img>');
                $img[0].src = re.target.result;
                files[0].result = re.target.result;

                element.find('.fileinput-filename').text(file.name);

                // if parent has max-height, using `(max-)height: 100%` on child doesn't take padding and border into account
                if (preview.css('max-height') != 'none') $img.css('max-height', parseInt(preview.css('max-height'), 10) - parseInt(preview.css('padding-top'), 10) - parseInt(preview.css('padding-bottom'), 10)  - parseInt(preview.css('border-top'), 10) - parseInt(preview.css('border-bottom'), 10));

                preview.html($img);
                element.addClass('fileinput-exists').removeClass('fileinput-new');

                element.trigger('change.uk.fileinput', files)
            };

            reader.readAsDataURL(file)
        } else {
            this.$element.find('.fileinput-filename').text(file.name);
            this.$preview.text(file.name);

            this.$element.addClass('fileinput-exists').removeClass('fileinput-new');

            this.$element.trigger('change.uk.fileinput')
        }
    };

    Fileinput.prototype.clear = function(e) {
        if (e) e.preventDefault();

        this.$hidden.val('');
        this.$hidden.attr('name', this.name);
        this.$input.attr('name', '');

        //ie8+ doesn't support changing the value of input with type=file so clone instead
        if (isIE) {
            var inputClone = this.$input.clone(true);
            this.$input.after(inputClone);
            this.$input.remove();
            this.$input = inputClone;
        } else {
            this.$input.val('');
        }

        this.$preview.html('');
        this.$element.find('.fileinput-filename').text('');
        this.$element.addClass('fileinput-new').removeClass('fileinput-exists');

        if (e !== undefined) {
            this.$input.trigger('change');
            this.$element.trigger('clear.uk.fileinput');
        }
    };

    Fileinput.prototype.reset = function() {
        this.clear();

        this.$hidden.val(this.original.hiddenVal);
        this.$preview.html(this.original.preview);
        this.$element.find('.fileinput-filename').text('');

        if (this.original.exists) {
            this.$element.addClass('fileinput-exists').removeClass('fileinput-new')    
        } else {
            this.$element.addClass('fileinput-new').removeClass('fileinput-exists')  
        } 

        this.$element.trigger('reset.uk.fileinput')
    };

    Fileinput.prototype.trigger = function(e) {
        this.$input.trigger('click');
        e.preventDefault()
    };

    // FILEUPLOAD PLUGIN DEFINITION
    // ===========================

    var old = $.fn.fileinput;

    $.fn.fileinput = function (options) {
        return this.each(function () {
            var $this = $(this),
                data = $this.data('uk.fileinput');
            if (!data) $this.data('uk.fileinput', (data = new Fileinput(this, options)));
            if (typeof options == 'string') data[options]()
        })
    };

    $.fn.fileinput.Constructor = Fileinput;

    // FILEINPUT NO CONFLICT
    // ====================

    $.fn.fileinput.noConflict = function () {
        $.fn.fileinput = old;
        return this
    };

    // FILEUPLOAD DATA-API
    // ==================

    $(document).on('click.fileinput.data-api', '[data-provides="fileinput"]', function (e) {
        var $this = $(this);
        if ($this.data('uk.fileinput')) return;
        $this.fileinput($this.data());

        var $target = $(e.target).closest('[data-dismiss="fileinput"],[data-trigger="fileinput"]');
        if ($target.length > 0) {
            e.preventDefault();
            $target.trigger('click.uk.fileinput');
        }
    })

}(window.jQuery);