/**
 * Created by Tivie on 06-01-2015.
 */

// Private properties
var showdown = {},
    parsers = {},
    globalOptions = {
        omitExtraWLInCodeBlocks: false,
        prefixHeaderId: false
    };

///////////////////////////////////////////////////////////////////////////
// Public API
//
/**
 * helper namespace
 * @type {{}}
 */
showdown.helper = {};


///////////////////////////////////////////////////////////////////////////
// API
//

// Public properties
showdown.extensions = {};

//Public methods
showdown.setOption = function (key, value) {
    globalOptions[key] = value;
    return this;
};

showdown.getOption = function (key) {
    return globalOptions[key];
};

showdown.getOptions = function () {
    return globalOptions;
};

/**
 * Static Method
 *
 * subParser(name)       - Get a registered subParser
 * subParser(name, func) - Register a subParser
 * @param {string} name
 * @param {function} [func]
 * @returns {*}
 */
showdown.subParser = function (name, func) {
    if (showdown.helper.isString(name)) {
        if (typeof func !== 'undefined') {
            parsers[name] = func;
        } else {
            if (parsers.hasOwnProperty(name)) {
                return parsers[name];
            } else {
                throw Error('SubParser named ' + name + ' not registered!');
            }
        }
    }
};

/**
 *
 * @param {object} [converterOptions]
 * @returns {{makeHtml: Function}}
 */
showdown.Converter = function (converterOptions) {

    converterOptions = converterOptions || {};

    var options = globalOptions,
        parserOrder = [
            'detab',
            'stripBlankLines',
            //runLanguageExtensions,
            'githubCodeBlocks',
            'hashHTMLBlocks',
            'stripLinkDefinitions',
            'blockGamut',
            'unescapeSpecialChars'
        ];

    // Merge options
    if (typeof converterOptions === 'object') {
        for (var opt in converterOptions) {
            if (converterOptions.hasOwnProperty(opt)) {
                options[opt] = converterOptions[opt];
            }
        }
    }

    var makeHtml = function (text) {

        //check if text is not falsy
        if (!text) {
            return text;
        }

        var globals = {
            gHtmlBlocks: [],
            gUrls: {},
            gTitles: {},
            gListLevel: 0,
            hashLinkCounts: {}
        };

        // attacklab: Replace ~ with ~T
        // This lets us use tilde as an escape char to avoid md5 hashes
        // The choice of character is arbitrary; anything that isn't
        // magic in Markdown will work.
        text = text.replace(/~/g, '~T');

        // attacklab: Replace $ with ~D
        // RegExp interprets $ as a special character
        // when it's in a replacement string
        text = text.replace(/\$/g, '~D');

        // Standardize line endings
        text = text.replace(/\r\n/g, '\n'); // DOS to Unix
        text = text.replace(/\r/g, '\n'); // Mac to Unix

        // Make sure text begins and ends with a couple of newlines:
        text = '\n\n' + text + '\n\n';

        // Run all registered parsers
        for (var i = 0; i < parserOrder.length; ++i) {
            var name = parserOrder[i];
            text = parsers[name](text, options, globals);
        }

        // attacklab: Restore dollar signs
        text = text.replace(/~D/g, '$$');

        // attacklab: Restore tildes
        text = text.replace(/~T/g, '~');

        // Run output modifiers
        //showdown.forEach(g_output_modifiers, function (x) {
        //    text = _ExecuteExtension(x, text);
        //});

        return text;
    };


    return {
        makeHtml: makeHtml
    };
};