#!/usr/bin/env objj

require("narwhal").ensureEngine("rhino");

@import <Foundation/Foundation.j>

@import "../lib/cappuccino/objj-analysis-tools.j"

var FILE = require("file");
var OS = require("os");
var UTIL = require("narwhal/util");

var CACHEMANIFEST = require("objective-j/cache-manifest");

var stream = require("narwhal/term").stream;
var parser = new (require("narwhal/args").Parser)();

parser.usage("INPUT_PROJECT OUTPUT_PROJECT");
parser.help("Combine a Cappuccino application into a single JavaScript file.");

parser.option("-m", "--main", "main")
    .def("main.j")
    .set()
    .help("The relative path (from INPUT_PROJECT) to the main file (default: 'main.j')");

parser.option("-F", "--framework", "frameworks")
    .push()
    .help("Add a frameworks directory, relative to INPUT_PROJECT (default: ['Frameworks'])");

parser.option("-P", "--path", "paths")
    .push()
    .help("Add a path (relative to the application root) to inline.");

parser.option("-f", "--force", "force")
    .def(false)
    .set(true)
    .help("Force overwriting OUTPUT_PROJECT if it exists");

parser.option("--index", "index")
    .def("index.html")
    .set()
    .help("The root HTML file to modify (default: index.html)");

parser.option("-s", "--split", "number", "split")
    .natural()
    .def(0)
    .help("Split into multiple files");

parser.option("-c", "--compressor", "compressor")
    .def("shrinksafe")
    .set()
    .help("Select a compressor to use (closure-compiler, yuicompressor, shrinksafe), or \"none\" (default: shrinksafe)");

parser.option("--manifest", "manifest")
    .set(true)
    .help("Generate HTML5 cache manifest.");

parser.option("-v", "--verbose", "verbose")
   .def(false)
   .set(true)
   .help("Verbose logging");

parser.helpful();

function main(args)
{
    var options = parser.parse(args);

    if (options.args.length < 2) {
        parser.printUsage(options);
        return;
    }

    var rootPath = FILE.path(options.args[0]).join("").absolute();
    var outputPath = FILE.path(options.args[1]).join("").absolute();

    if (outputPath.exists()) {
        if (options.force) {
            // FIXME: why doesn't this work?!
            //outputPath.rmtree();
            OS.system(["rm", "-rf", outputPath]);
        } else {
            stream.print("\0red(OUTPUT_PROJECT " + outputPath + " exists. Use -f to overwrite.\0)");
            OS.exit(1);
        }
    }

    options.frameworks.push("Frameworks");

    var mainPath = String(rootPath.join(options.main));
    var frameworks = options.frameworks.map(function(framework) { return rootPath.join(framework); });
    var environment = "Browser";

    stream.print("\0yellow("+Array(81).join("=")+"\0)");
    stream.print("Application root:    \0green(" + rootPath + "\0)");
    stream.print("Output directory:    \0green(" + outputPath + "\0)");

    stream.print("\0yellow("+Array(81).join("=")+"\0)");
    stream.print("Main file:           \0green(" + mainPath + "\0)");
    stream.print("Frameworks:          \0green(" + frameworks + "\0)");
    stream.print("Environment:         \0green(" + environment + "\0)");

    var flattener = new ObjectiveJFlattener(rootPath);

    flattener.options = options;

    flattener.setIncludePaths(frameworks);
    flattener.setEnvironments([environment, "ObjJ"]);

    print("Loading application.");
    flattener.load(mainPath);

    print("Loading default theme.");
    flattener.require("objective-j").objj_eval("("+(function() {

        var defaultThemeName = [CPApplication defaultThemeName],
            bundle = nil;

        if (defaultThemeName === @"Aristo" || defaultThemeName === @"Aristo2")
            bundle = [CPBundle bundleForClass:[CPApplication class]];
        else
            bundle = [CPBundle mainBundle];

        var blend = [[CPThemeBlend alloc] initWithContentsOfURL:[bundle pathForResource:defaultThemeName + @".blend"]];
        [blend loadWithDelegate:nil];

    })+")")();

    var applicationJSs = flattener.buildApplicationJS();

    FILE.copyTree(rootPath, outputPath);

    applicationJSs.forEach(function(applicationJS, n) {
        var name = "Application"+(n||"")+".js";
        if (options.compressor === "none") {
            print("skipping compression: " + name);
        } else {
            print("compressing: " + name);
            applicationJS = require("minify/"+options.compressor).compress(applicationJS, { charset : "UTF-8", useServer : true });
        }
        outputPath.join(name).write(applicationJS, { charset : "UTF-8" });
    });

    rewriteMainHTML(outputPath.join(options.index));

    if (options.manifest) {
        CACHEMANIFEST.generateManifest(outputPath, {
            index : outputPath.join(options.index),
            exclude : Object.keys(flattener.filesToCache).map(function(path) { return outputPath.join(path).toString(); })
        });
    }
}

// ObjectiveJFlattener inherits from ObjectiveJRuntimeAnalyzer
function ObjectiveJFlattener(rootPath) {
    ObjectiveJRuntimeAnalyzer.apply(this, arguments);

    this.filesToCache = {};
    this.fileCacheBuffer = [];
    this.functionsBuffer = [];
}

ObjectiveJFlattener.prototype = Object.create(ObjectiveJRuntimeAnalyzer.prototype);

ObjectiveJFlattener.prototype.buildApplicationJS = function() {

    this.setupFileCache();
    this.serializeFunctions();
    this.serializeFileCache();

    var additions = FILE.read(FILE.join(FILE.dirname(module.path), "..", "..", "cappuccino", "lib", "cappuccino", "objj-flatten-additions.js"), { charset:"UTF-8" });

    var applicationJSs = [];

    if (this.options.split === 0) {
        var buffer = [];
        buffer.push("var baseURL = new CFURL(\".\", ObjectiveJ.pageURL);");
        buffer.push(additions);
        buffer.push(this.fileCacheBuffer.join("\n"));
        buffer.push(this.functionsBuffer.join("\n"));
        buffer.push("ObjectiveJ.bootstrap();");
        applicationJSs.push(buffer.join("\n"));
    } else {
        var appFilesCount = this.options.split;

        var buffers = [];
        for (var i = 0; i <= appFilesCount; i++)
            buffers.push([]);

        var chunks = this.fileCacheBuffer.concat(this.functionsBuffer).sort(function(chunkA, chunkB) {
            return chunkA.length - chunkB.length;
        });

        // try to equally distribute the chunks. could be better but good enough for now.
        var n = 0;
        while (chunks.length) {
            buffers[(n++ % appFilesCount) + 1].push(chunks.pop());
        }

        buffers[0].push("var baseURL = new CFURL(\".\", ObjectiveJ.pageURL);");
        buffers[0].push(additions);

        buffers[0].push("var appFilesCount = " + appFilesCount +";");
        buffers[0].push("for (var i = 1; i <= appFilesCount; i++) {");
        buffers[0].push("    var script = document.createElement(\"script\");");
        buffers[0].push("    script.src = \"Application\"+i+\".js\";");
        buffers[0].push("    script.charset = \"UTF-8\";");
        buffers[0].push("    script.onload = function() { if (--appFilesCount === 0) ObjectiveJ.bootstrap(); };");
        buffers[0].push("    document.getElementsByTagName(\"head\")[0].appendChild(script);");
        buffers[0].push("}");

        buffers.forEach(function(buffer) {
            applicationJSs.push(buffer.join("\n"));
        });
    }

    return applicationJSs;
}

ObjectiveJFlattener.prototype.serializeFunctions = function() {
    var inlineFunctions = true;//this.options.inlineFunctions;

    var outputFiles = {};

    var _cachedExecutableFunctions = {};

    this.require("objective-j").FileExecutable.allFileExecutables().forEach(function(executable) {
        var path = executable.path();

        if (inlineFunctions)
        {
            // stringify the function, replacing arguments
            var functionString = executable._function.toString().replace(", require, exports, module, system, print, window", ""); // HACK

            var relative = this.rootPath.relative(path).toString();
            this.functionsBuffer.push("ObjectiveJ.FileExecutable._cacheFunction(new CFURL("+JSON.stringify(relative)+", baseURL),\n"+functionString+");");
        }

        var bundle = this.context.global.CFBundle.bundleContainingURL(path);
        if (bundle && bundle.infoDictionary())
        {
            var executablePath = bundle.executablePath(),
                relativeToBundle = FILE.relative(FILE.join(bundle.path(), ""), path);

            if (executablePath)
            {
                if (inlineFunctions)
                {
                    // remove the code since we're inlining the functions
                    executable._code = "alert("+JSON.stringify(relativeToBundle)+");";
                }

                if (!outputFiles[executablePath])
                {
                    outputFiles[executablePath] = [];
                    outputFiles[executablePath].push("@STATIC;1.0;");
                }

                var fileContents = executable.toMarkedString();

                outputFiles[executablePath].push("p;" + relativeToBundle.length + ";" + relativeToBundle);
                outputFiles[executablePath].push("t;" +  fileContents.length + ";" +  fileContents);

                // stream.print("Adding \0green(" + this.rootPath.relative(path) + "\0) to \0cyan(" + this.rootPath.relative(executablePath) + "\0)");
            }
        }
        else
            CPLog.warn("No bundle (or info dictionary for) " + rootPath.relative(path));
    }, this);

    for (var executablePath in outputFiles)
    {
        var relative = this.rootPath.relative(executablePath).toString();
        var contents = outputFiles[executablePath].join("");
        this.filesToCache[relative] = contents;
    }
}

ObjectiveJFlattener.prototype.serializeFileCache = function() {
    for (var relative in this.filesToCache) {
        var contents = this.filesToCache[relative];
        print("caching: " + relative + " => " + (contents == null ? 404 : 200));
        if (contents == null)
            this.fileCacheBuffer.push("CFHTTPRequest._cacheRequest(new CFURL("+JSON.stringify(relative)+", baseURL), 404);");
        else
            this.fileCacheBuffer.push("CFHTTPRequest._cacheRequest(new CFURL("+JSON.stringify(relative)+", baseURL), 200, {}, "+JSON.stringify(contents)+");");
    }
}

ObjectiveJFlattener.prototype.setupFileCache = function() {
    var paths = {};

    UTIL.update(paths, this.requestedURLs);

    this.options.paths.forEach(function(relativePath) {
       paths[this.rootPath.join(relativePath)] = true;
    }, this);

    Object.keys(paths).forEach(function(absolute) {
        var relative = this.rootPath.relative(absolute).toString();
        if (relative.indexOf("..") === 0)
        {
            print("skipping (parent of app root): " + absolute);
            return;
        }

        if (FILE.isFile(absolute))
        {
            // if (this.options.maxCachedSize && FILE.size(absolute) > this.options.maxCachedSize)
            // {
            //     print("skipping (larger than "+this.options.maxCachedSize+" bytes): " + absolute);
            //     return;
            // }

            var contents = FILE.read(absolute, { charset : "UTF-8" });
            this.filesToCache[relative] = contents;
        } else {
            this.filesToCache[relative] = null;
        }
    }, this);
}

// "$1" is the matching indentation
var scriptTagsBefore =
    '$1<script type = "text/javascript">\n'+
    '$1    OBJJ_AUTO_BOOTSTRAP = false;\n'+
    '$1</script>';

var scriptTagsAfter =
    '$1<script type="text/javascript" src="Application.js" charset="UTF-8"></script>';

// enable CPLog:
// scriptTagsAfter = '$1<script type="text/javascript">\n$1    CPLogRegister(CPLogConsole);\n$1</script>\n' + scriptTagsAfter;

function rewriteMainHTML(indexHTMLPath) {
    if (indexHTMLPath.isFile()) {
        var indexHTML = indexHTMLPath.read({ charset : "UTF-8" });

        // inline the Application.js if it's smallish
        var applicationJSPath = indexHTMLPath.dirname().join("Application.js");
        if (applicationJSPath.size() < 10*1024) {
            // escape any dollar signs by replacing them with two
            // then indent by splitting/joining on newlines
            scriptTagsAfter =
                '$1<script type="text/javascript">\n'+
                '$1    ' + applicationJSPath.read({ charset : "UTF-8" }).replace(/\$/g, "$$$$").split("\n").join("\n$1    ")+'\n'+
                '$1</script>';
        }

        // attempt to find Objective-J script tag and add ours
        var newIndexHTML = indexHTML.replace(/([ \t]+)<script[^>]+Objective-J\.js[^>]+>(?:\s*<\/script>)?/,
            scriptTagsBefore+'\n$&\n'+scriptTagsAfter);

        if (newIndexHTML !== indexHTML) {
            stream.print("\0green(Modified: "+indexHTMLPath+".\0)");
            indexHTMLPath.write(newIndexHTML, { charset : "UTF-8" });
            return;
        }
    } else {
        stream.print("\0yellow(Warning: "+indexHTMLPath+" does not exist. Specify an alternate index HTML file with the --index option.\0)");
    }

    stream.print("\0yellow(Warning: Unable to automatically modify "+indexHTMLPath + ".\0)");
    stream.print("\nAdd the following before the Objective-J script tag:");
    stream.print(scriptTagsBefore.replace(/\$1/g, "    "));
    stream.print("\nAdd the following after the Objective-J script tag:");
    stream.print(scriptTagsAfter.replace(/\$1/g, "    "));
}