/*jslint node:true */

module.exports = {
    sanitize: function (text) {
        return text.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/"/g, "&quot;").replace(/'/g, "&#39;");
    },
    copyOptions: function (options) {
        var key, copy = {};
        for (key in options) {
            if (options.hasOwnProperty(key)) {
                copy[key] = options[key];
            }
        }
        return copy;
    },
    ensureFlagExists: function (item, options) {
        if (!(item in options) || typeof options[item] !== 'boolean') {
            options[item] = false;
        }
    },
    ensureSpacesExists: function (options) {
        if (!('spaces' in options) || (typeof options.spaces !== 'number' && typeof options.spaces !== 'string')) {
            options.spaces = 0;
        }
    },
    ensureKeyExists: function (key, options) {
        if (!(key + 'Key' in options) || typeof options[key + 'Key'] !== 'string') {
            options[key + 'Key'] = options.compact ? '_' + key : key;
        }
    },
    getCommandLineHelp: function (command, requiredArgs, optionalArgs) {
        var reqArgs = requiredArgs.reduce(function (res, arg) {return res + ' <' + arg.arg + '>';}, '');
        var output = 'Usage: ' + command + reqArgs + ' [options]' + '\n';
        requiredArgs.forEach(function (argument) {
            output += '  <' + argument.arg + '>' + Array(20 - argument.arg.length).join(' ') + argument.desc + '\n';
        });
        output += '\nOptions:' + '\n';
        optionalArgs.forEach(function (argument) {
            output += '  --' + argument.arg + Array(20 - argument.arg.length).join(' ') + argument.desc + '\n';
        });
        return output;
    },
    mapCommandLineArgs: function (requiredArgs, optionalArgs) {
        var options = {}, r, o, a = 2;
        for (r = 0; r < requiredArgs.length; r += 1) {
            if (a < process.argv.length && process.argv[a].substr(0, 1) !== '-' && process.argv[a] !== 'JASMINE_CONFIG_PATH=./jasmine.json') {
                options[requiredArgs[r].option] = process.argv[a++];
            } else {
                break;
            }
        }
        for (; a < process.argv.length; a += 1) {
            for (o = 0; o < optionalArgs.length; o += 1) {
                if (optionalArgs[o].alias === process.argv[a].slice(1) || optionalArgs[o].arg === process.argv[a].slice(2)) {
                    break;
                }
            }
            if (o < optionalArgs.length) {
                switch (optionalArgs[o].type) {
                    case 'file': case 'string': case 'number':
                        if (a + 1 < process.argv.length) {
                            a += 1;
                            options[optionalArgs[o].option] = (optionalArgs[o].type === 'number' ? Number(process.argv[a]) : process.argv[a]);
                        }
                        break;
                    case 'flag':
                        options[optionalArgs[o].option] = true; break;
                }
            }
        }
        return options;
    }
};