/*
 * This file is part of the MediaWiki extension MultimediaViewer.
 *
 * MultimediaViewer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * MultimediaViewer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MultimediaViewer.  If not, see <http://www.gnu.org/licenses/>.
 */

( function ( mw ) {
	/**
	 * @class mw.mmv.model.Image
	 * Represents information about a single image
	 * @constructor
	 * @param {mw.Title} title
	 * @param {number} size Filesize in bytes of the original image
	 * @param {number} width Width of the original image
	 * @param {number} height Height of the original image
	 * @param {string} mimeType
	 * @param {string} url URL to the image itself (original version)
	 * @param {string} descriptionUrl URL to the image description page
	 * @param {string} repo The repository this image belongs to
	 * @param {string} lastUploader The last person to upload a version of this image.
	 * @param {string} lastUploadDateTime The time and date the last upload occurred
	 * @param {string} originalUploadDateTime The time and date the original upload occurred
	 * @param {string} description
	 * @param {string} source
	 * @param {string} author
	 * @param {string} license
	 * @param {number} latitude
	 * @param {number} longitude
	 * @param {string[]} categories
	 */
	function Image(
			title,
			size,
			width,
			height,
			mimeType,
			url,
			descriptionUrl,
			repo,
			lastUploader,
			uploadDateTime,
			creationDateTime,
			description,
			source,
			author,
			license,
			latitude,
			longitude,
			categories
	) {
		/** @property {mw.Title} title The title of the image file */
		this.title = title;

		/** @property {number} size The filesize, in bytes, of the original image */
		this.size = size;

		/** @property {number} width The width, in pixels, of the original image */
		this.width = width;

		/** @property {number} height The height, in pixels, of the original image */
		this.height = height;

		/** @property {string} mimeType The MIME type of the original image */
		this.mimeType = mimeType;

		/** @property {string} url The URL to the original image */
		this.url = url;

		/** @property {string} descriptionUrl The URL to the description page for the image */
		this.descriptionUrl = descriptionUrl;

		/** @property {string} repo The name of the repository where this image is stored */
		this.repo = repo;

		/** @property {string} lastUploader The person who uploaded the last version of the file */
		this.lastUploader = lastUploader;

		/** @property {string} uploadDateTime The date and time of the last upload */
		this.uploadDateTime = uploadDateTime;

		/** @property {string} creationDateTime The date and time that the image was created */
		this.creationDateTime = creationDateTime;

		/** @property {string} description The description from the file page - unsafe HTML sometimes goes here */
		this.description = description;

		/** @property {string} source The source for the image (could be an organization, e.g.) - unsafe HTML sometimes goes here */
		this.source = source;

		/** @property {string} author The author of the image - unsafe HTML sometimes goes here */
		this.author = author;

		/** @property {string} license The license under which the image is distributed */
		this.license = license;

		/** @property {number} latitude The latitude of the place where the image was created */
		this.latitude = latitude;

		/** @property {number} longitude The longitude of the place where the image was created */
		this.longitude = longitude;

		/**
		 * @property {Object} thumbUrls
		 * An object indexed by image widths
		 * with URLs to appropriately sized thumbnails
		 */
		this.thumbUrls = {};

		/**
		* @property {string[]} categories
		* The categories this image is a member of.
		*/
		this.categories = categories;
	}

	/**
	 * @method
	 * @static
	 * Constructs a new Image object out of an object containing
	 * imageinfo data from an API response.
	 * @param {mw.Title} title
	 * @param {Object} imageInfo
	 * @returns {mw.mmv.model.Image}
	 */
	Image.newFromImageInfo = function ( title, imageInfo ) {
		var uploadDateTime, creationDateTime, imageData,
			description, source, author, license,
			latitude, longitude, categories,
			innerInfo = imageInfo.imageinfo[0],
			extmeta = innerInfo.extmetadata;

		if ( extmeta ) {
			creationDateTime = extmeta.DateTimeOriginal;
			uploadDateTime = extmeta.DateTime;

			if ( uploadDateTime ) {
				uploadDateTime = uploadDateTime.value.replace( /<.*?>/g, '' );
			}

			if ( creationDateTime ) {
				creationDateTime = creationDateTime.value.replace( /<.*?>/g, '' );
			}

			description = extmeta.ImageDescription && extmeta.ImageDescription.value;
			source = extmeta.Credit && extmeta.Credit.value;
			author = extmeta.Artist && extmeta.Artist.value;
			license = extmeta.License && extmeta.License.value;

			latitude = extmeta.GPSLatitude && parseFloat( extmeta.GPSLatitude.value );
			longitude = extmeta.GPSLongitude && parseFloat( extmeta.GPSLongitude.value );

			categories = extmeta.Categories && extmeta.Categories.value.split( '|' );
		}

		imageData = new Image(
			title,
			innerInfo.size,
			innerInfo.width,
			innerInfo.height,
			innerInfo.mime,
			innerInfo.url,
			innerInfo.descriptionurl,
			imageInfo.imagerepository,
			innerInfo.user,
			uploadDateTime,
			creationDateTime,
			description,
			source,
			author,
			license,
			latitude,
			longitude,
			categories
		);

		if ( innerInfo.thumburl ) {
			imageData.addThumbUrl(
				innerInfo.thumbwidth,
				innerInfo.thumburl
			);
		}

		return imageData;
	};

	/**
	 * @method
	 * Add a thumb URL
	 * @param {number} width
	 * @param {string} url
	 */
	Image.prototype.addThumbUrl = function ( width, url ) {
		this.thumbUrls[width] = url;
	};

	/**
	 * @method
	 * Get a thumb URL if we have it.
	 * @param {number} width
	 * @returns {string|undefined}
	 */
	Image.prototype.getThumbUrl = function ( width ) {
		return this.thumbUrls[width];
	};

	/**
	 * @method
	 * Check whether the image is CC-licensed.
	 * @returns {boolean}
	 */
	Image.prototype.isCcLicensed = function () {
		return this.license && this.license.substr( 0, 2 ) === 'cc';
	};

	/**
	 * @method
	 * Check whether the image has geolocation data.
	 * @returns {boolean}
	 */
	Image.prototype.hasCoords = function () {
		return this.hasOwnProperty( 'latitude' ) && this.hasOwnProperty( 'longitude' ) &&
			this.latitude !== undefined && this.latitude !== null &&
			this.longitude !== undefined && this.longitude !== null;
	};

	mw.mmv.model.Image = Image;
}( mediaWiki ) );