/*
 * Originally taken from https://github.com/decker405/figwheel-react-native
 *
 * @providesModule figwheel-bridge
 */

var CLOSURE_UNCOMPILED_DEFINES = null;

var config = {
    basePath: '',
    googBasePath: 'goog/'
};

// Uninstall watchman???
function importJs(src, success, error){
    if(typeof success !== 'function') { success = function(){}; }
    if(typeof error !== 'function') { error = function(){}; }

    console.log('(Figwheel Bridge) Importing: ' + config.basePath + src);
    try {
        importScripts(config.basePath + src);
        success();
    } catch(e) {
        console.warn('Could not load: ' + config.basePath + src);
        console.error('Import error: ' + e);
        error();
    }
}

// Loads base goog js file then cljs_deps, goog.deps, core project cljs, and then figwheel
// Also calls the function to shim goog.require and goog.net.jsLoader.load
function loadApp(platform) {
    config.basePath = "/target/" + platform + "/";

    if(typeof goog === "undefined") {
        console.log('Loading Closure base.');
        importJs('goog/base.js');
        shimBaseGoog();
        fakeLocalStorageAndDocument();
        importJs('cljs_deps.js');
        importJs('goog/deps.js');
        importJs('$PROJECT_NAME_UNDERSCORED$/'+platform+'/core.js');

        console.log('Done loading Clojure app');
    }
}

function startApp(platform) {
    if(typeof goog === "undefined") {
        loadApp(platform);
    }
    console.log('Starting the app');
    eval("$PROJECT_NAME_UNDERSCORED$."+platform+".core.init()");
}

// Loads base goog js file then cljs_deps, goog.deps, core project cljs, and then figwheel
// Also calls the function to shim goog.require and goog.net.jsLoader.load
function startWithFigwheel(platform) {
    if(typeof goog === "undefined") {
        startApp(platform);
    }
    importJs('figwheel/connect.js');

    // goog.require('figwheel.connect');
    // goog.require('rn_test.core');
    shimJsLoader();

}

function shimBaseGoog(){
    goog.basePath = 'goog/';
    goog.writeScriptSrcNode = importJs;
    goog.writeScriptTag_ = function(src, opt_sourceText){
        importJs(src);
        return true;
    }
    goog.inHtmlDocument_ = function(){ return true; };
}

function fakeLocalStorageAndDocument() {
    window.localStorage = {};
    window.localStorage.getItem = function(){ return 'true'; };
    window.localStorage.setItem = function(){};

    window.document = {};
    window.document.body = {};
    window.document.body.dispatchEvent = function(){};
    window.document.createElement = function(){};
}


// Used by figwheel - uses importScript to load JS rather than <script>'s
function shimJsLoader(){
    goog.net.jsloader.load = function(uri, options) {
        var deferred = {
            callbacks: [],
            errbacks: [],
            addCallback: function(cb){
                deferred.callbacks.push(cb);
            },
            addErrback: function(cb){
                deferred.errbacks.push(cb);
            },
            callAllCallbacks: function(){
                while(deferred.callbacks.length > 0){
                    deferred.callbacks.shift()();
                }
            },
            callAllErrbacks: function(){
                while(deferred.errbacks.length > 0){
                    deferred.errbacks.shift()();
                }
            }
        };

        // Figwheel needs this to be an async call, so that it can add callbacks to deferred
        setTimeout(function(){
            importJs(uri.getPath(), deferred.callAllCallbacks, deferred.callAllErrbacks);
        }, 1);

        return deferred;
    }
}

module.exports = {
    start: startApp,
    figwheel : startWithFigwheel,
    load: loadApp
};