// Copyright 2012 Mark Cavage, Inc.  All rights reserved.
//
// Restify supports both a client and server API, and in the essence of not
// loading the kitchen sink on clients, the exports here is chunked up into
// client and server; note clients will have to opt in by setting the env
// var "RESTIFY_CLIENT_ONLY", but if you're in that boat, it's not hard to do,
// and enables much faster load times
//

'use strict';

var shallowCopy = require('./utils').shallowCopy;


/**
 * creates an http request client. based on options passed in, will create one
 * of three existing clients: Http, String, or Json.
 * @public
 * @function createClient
 * @param    {Object} options      an options object
 * @param    {String} options.type 'http' | 'json' | 'string'
 * @returns  {HttpClient | JsonClient | StringClient}
 */
function createClient(options) {
    if (typeof (options) === 'string') {
        options = {
            url: options
        };
    }

    var assert = require('assert-plus');
    var bunyan = require('./bunyan_helper');
    var clients = require('./clients');

    assert.object(options, 'options');

    var client;
    var opts = shallowCopy(options);
    opts.agent = options.agent;
    opts.name = opts.name || 'restify';
    opts.type = opts.type || 'application/octet-stream';
    opts.log = opts.log || bunyan.createLogger(opts.name);

    switch (opts.type) {
        case 'json':
            client = new clients.JsonClient(opts);
            break;

        case 'string':
            client = new clients.StringClient(opts);
            break;

        case 'http':
        default:
            client = new clients.HttpClient(opts);
            break;
    }

    return (client);
}


/**
 * creates a json httpclient.
 * @public
 * @function createJsonClient
 * @param    {Object}     options an options object
 * @returns  {JsonClient}         a json client
 */
function createJsonClient(options) {
    if (typeof (options) === 'string') {
        options = {
            url: options
        };
    }

    options = options ? shallowCopy(options) : {};
    options.type = 'json';
    return (createClient(options));
}


/**
 * creates a string httpclient.
 * @public
 * @function createStringClient
 * @param    {Object}       options an options object
 * @returns  {StringClient}         a string client
 */
function createStringClient(options) {
    if (typeof (options) === 'string') {
        options = {
            url: options
        };
    }

    options = options ? shallowCopy(options) : {};
    options.type = 'string';
    return (createClient(options));
}


/**
 * creates a regular httpclient.
 * @public
 * @function createHttpClient
 * @param    {Object}     options an options object
 * @returns  {HttpClient}         an http client
 */
function createHttpClient(options) {
    if (typeof (options) === 'string') {
        options = {
            url: options
        };
    }

    options = options ? shallowCopy(options) : {};
    options.type = 'http';
    return (createClient(options));
}


/**
 * creates a server.
 * @public
 * @function createServer
 * @param    {Object} options an options object
 * @returns  {Server}
 */
function createServer(options) {
    var bunyan = require('./bunyan_helper');
    var InternalError = require('./errors').InternalError;
    var Router = require('./router');
    var Server = require('./server');

    var opts = shallowCopy(options || {});
    var server;

    opts.name = opts.name || 'restify';
    opts.log = opts.log || bunyan.createLogger(opts.name);
    opts.router = opts.router || new Router(opts);

    server = new Server(opts);
    server.on('uncaughtException', function (req, res, route, e) {
        if (this.listeners('uncaughtException').length > 1 ||
            res.headersSent) {
            return (false);
        }

        res.send(new InternalError(e, e.message || 'unexpected error'));
        return (true);
    });

    return (server);
}


/**
 * Returns a string representation of a URL pattern , with its
 * parameters filled in by the passed hash.
 *
 * If a key is not found in the hash for a param, it is left alone.
 * @public
 * @function realizeUrl
 * @param   {String} pattern a url string
 * @param   {Object} params  a hash of parameter names to values for
 *                           substitution
 * @returns {String}
 */
function realizeUrl(pattern, params) {
    var p = pattern.replace(/\/:([^/]+)/g, function (match, k) {
        return (params.hasOwnProperty(k) ? '/' + params[k] : match);
    });


    return (require('./utils').sanitizePath(p));
}


///--- Exports

module.exports = {
    // Client API
    createClient: createClient,
    createJsonClient: createJsonClient,
    createJSONClient: createJsonClient,
    createStringClient: createStringClient,
    createHttpClient: createHttpClient,
    get HttpClient() {
        return (require('./clients').HttpClient);
    },
    get JsonClient() {
        return (require('./clients').JsonClient);
    },
    get StringClient() {
        return (require('./clients').StringClient);
    },

    // Miscellaneous API
    get bunyan() {
        return (require('./bunyan_helper'));
    },

    errors: {}

};

var errors = require('./errors');
Object.keys(errors).forEach(function (k) {
    module.exports.errors[k] = errors[k];
    module.exports[k] = errors[k];
});

if (!process.env.RESTIFY_CLIENT_ONLY) {

    module.exports.createServer = createServer;
    module.exports.httpDate = require('./http_date');
    module.exports.realizeUrl = realizeUrl;
    module.exports.formatters = require('./formatters');
    module.exports.plugins = {};
    var plugins = require('./plugins');
    Object.keys(plugins).forEach(function (k) {
        module.exports.plugins[k] = plugins[k];
        module.exports[k] = plugins[k];
    });
}
