/**
 * Add array indexOf() method
 *
 * @param  {object} Object
 * @param  {int} max
 * @param  {int} min
 * @return {mixed}
 */
if (!Array.prototype.indexOf)  Array.prototype.indexOf = (function(Object, max, min){
  "use strict";
  return function indexOf(member, fromIndex) {
    if(this===null||this===undefined)throw TypeError("Array.prototype.indexOf called on null or undefined");

    var that = Object(this), Len = that.length >>> 0, i = min(fromIndex | 0, Len);
    if (i < 0) i = max(0, Len+i); else if (i >= Len) return -1;

    if(member===void 0){ for(; i !== Len; ++i) if(that[i]===void 0 && i in that) return i; // undefined
    }else if(member !== member){   for(; i !== Len; ++i) if(that[i] !== that[i]) return i; // NaN
    }else                           for(; i !== Len; ++i) if(that[i] === member) return i; // all else

    return -1; // if the value was not found, then return -1
  };
})(Object, Math.max, Math.min);

/**
 * Save for web
 */
var s = {
    defaults: {
        width: '1000px',
        quality: 60,
        warnSize: UnitValue('3000px')
    },
    imgTypes: ['jpg','jpeg','gif','png','pdf','svg'],
    files: null,
    destination: null,
    width: null,
    quality: null,
     /**
      * Set files
      */
    setFiles: function() {
        this.files = openDialog();
    },
    /**
     * Set image width
     */
    setWidth: function() {
        var w = prompt('What pixel width would you like to resize your images to?', '1000 px');
        this.width = UnitValue(w ? w : this.defaults.width);
    },
    /**
     * Set quality
     */
    setQuality: function(q) {
        q = parseInt(prompt('What quality would you like the images saved at? (0-100)', this.defaults.quality));
        if (!q || q < 0 || q > 100) {
            this.setQuality();
        }
        this.quality = q;
    },
    /**
     * Set save for web options
     */
    setSaveForWebOptions: function() {
        this.saveForWebOptions = new ExportOptionsSaveForWeb();
        this.saveForWebOptions.quality = this.quality;
        this.saveForWebOptions.format = SaveDocumentType.JPEG;
        this.saveForWebOptions.saveForWebOptions = true;
    },
    /**
     * Check width
     */
    checkWidth: function(c) {
        if (this.width.as('px') > this.defaults.warnSize.as('px')) {
            c = confirm('The provided size is very large to save for web. Are you sure you would like to continue?');
            if (c) return true;
            if (confirm('Would you like to provide a different width?')) this.init();
            return false;
        }
        return true;
    },
    /**
     * Set save destination
     */
    setDestination: function() {
        this.destination = Folder.selectDialog("Choose Save Destination");
    },
    /**
     * Save for web
     *
     * @param  File
     */
    saveForWeb: function(file) {
        // Ensure valid file type
        if (file && file.constructor && file.constructor == File) {
            var doc = open(file),
                w = doc.width,
                h = doc.height,
                name = doc.name.split('.'),
                ext = name.pop();

            if (this.imgTypes.indexOf(ext.toLowerCase()) < 0) {
                name.push(ext);
            }
            name = name.join('.');

            // Resize
            if (w.as('px') > this.width.as('px')) {
                doc.resizeImage(this.width, null, 72);
            }

            // Save for web
            doc.exportDocument(
                new File(this.destination + '/' + name + '.jpg'),
                ExportType.SAVEFORWEB,
                this.saveForWebOptions
            );

            // Close
            doc.close(SaveOptions.DONOTSAVECHANGES);
        }
    },
    /**
     * Initialize script
     */
    init: function() {
        if (!this.files) this.setFiles();
        if (!this.destination) this.setDestination();
        this.setWidth();
        this.setQuality();
        this.setSaveForWebOptions();

        // Check width
        if (this.checkWidth()) {
            // Loop through files
            for (var i in this.files) {
                this.saveForWeb(this.files[i]);
            }
        }
    }
};

s.init();