/**
 * Instructions for updating this file.
 * - this file must be updated everytime a new cross-folder dependency is added
 *   into any of the [refs.ts] file. For instance, if suddenly you add a
 *   reference to [../storage/whatever.ts] in [build/libwinRT.ts], then you must
 *   update the dependencies of the [build/libwinRT.d.ts] task.
 **/
var assert = require('assert');
var child_process = require("child_process");
var fs = require("fs");

jake.addListener("start", function () {
  if (!fs.existsSync("build"))
    fs.mkdirSync("build");
});

// The list of files generated by the build.
var generated = [
  'shell/npm/package.json',
  'shell/npm/bin/touchdevelop.js',
  'results.html',
  'results.json',
];

// This function tries to be "smart" about the target.
// - if the target is of the form "build/foobar.ts", the output is bundled with
//   [--out] into "build/foobar.js", and "build/foobar.d.ts" is also generated;
// - otherwise, the file is just compiled as a single file into the "build/"
//   directory
function mkSimpleTask(production, dependencies, target) {
    var tscCall = [
      "node node_modules/typescript/bin/tsc",
      "--noEmitOnError",
      "--target ES5",
      "--module commonjs",
      "--declaration", // not always strictly needed, but better be safe than sorry
    ];
    var match = target.match(/(\w+)\/refs.ts/);
    if (match) {
      tscCall.push("--out build/"+match[1]+".js");
    } else {
      tscCall.push("--outDir build/");
    }
    tscCall.push(target);
    return file(production, dependencies, { async: true }, function () {
        console.log("[B] "+production);
        jake.exec(tscCall.join(" "), { printStdout: true }, function () {
            complete();
        });
    });
}

// A series of compile-and-run rules that generate various files for the build
// system. They currently have to run from the [build] directory but this is
// FIXME

function runInBuildAndComplete(cmds) {
    process.chdir("build");
    jake.exec(cmds, {}, function() {
        process.chdir("..");
        complete();
    });
}

mkSimpleTask('build/genmeta.js', [ 'tools', ], "tools/genmeta.ts");
file('build/api.js', [ "build/genmeta.js" ], { async: true }, function () {
    console.log("[P] generating build/api.js, localization.json and topiclist.json");
    runInBuildAndComplete([
        "node genmeta.js",
    ]);
});

mkSimpleTask('build/addCssPrefixes.js', [ 'tools' ], "tools/addCssPrefixes.ts");
task('css-prefixes', [ "build/addCssPrefixes.js" ], { async: true }, function () {
    console.log("[P] modifying in-place all css files");
    runInBuildAndComplete([
        "node addCssPrefixes.js"
    ]);
});

mkSimpleTask('build/shell.js', [ 'shell/shell.ts' ], "shell/shell.ts");
mkSimpleTask('build/package.js', [ 'shell/package.ts', 'build/shell.js' ], "shell/package.ts");
file('build/pkgshell.js', [ 'build/package.js' ], { async: true }, function () {
    console.log("[P] generating build/pkgshell.js and packaging");
    runInBuildAndComplete([
        "node package.js"
    ]);
});


// These dependencies have been hand-crafted by reading the various [refs.ts]
// files. The dependencies inside the same folder are coarse-grained: for
// instance, anytime something changes in [editor/], [build/editor.d.ts] gets
// rebuilt. This amounts to assuming that for all [foo/bar.ts], [bar.ts] appears
// in [build/foo.ts].
mkSimpleTask('build/browser.d.ts', [
    'browser/browser.ts'
], "browser/browser.ts");
mkSimpleTask('build/rt.d.ts', [
    'build/browser.d.ts',
    'rt',
    'lib'
], "rt/refs.ts");
mkSimpleTask('build/storage.d.ts', [
    'build/rt.d.ts',
    'rt/typings.d.ts',
    'build/browser.d.ts',
    'storage'
], "storage/refs.ts");
mkSimpleTask('build/ast.d.ts', [
    'build/rt.d.ts',
    'ast'
], "ast/refs.ts");
mkSimpleTask('build/libwinRT.d.ts', [
    'build/rt.d.ts',
    'build/browser.d.ts',
    'libwinRT'
], "libwinRT/refs.ts");
mkSimpleTask('build/libwab.d.ts', [
    'build/rt.d.ts',
    'rt/typings.d.ts',
    'build/browser.d.ts',
    'libwab'
], "libwab/refs.ts");
mkSimpleTask('build/libnode.d.ts', [
    'build/rt.d.ts',
    'rt/typings.d.ts',
    'libnode'
], "libnode/refs.ts");
mkSimpleTask('build/libcordova.d.ts', [
    'build/rt.d.ts',
    'rt/typings.d.ts',
    'build/browser.d.ts',
    'libcordova'
], "libcordova/refs.ts");
mkSimpleTask('build/editor.d.ts', [
    'rt/typings.d.ts',
    'build/browser.d.ts',
    'build/rt.d.ts',
    'build/ast.d.ts',
    'build/storage.d.ts',
    'build/libwinRT.d.ts',
    'build/libwab.d.ts',
    'build/libcordova.d.ts',
    'intellitrain',
    'editor'
], "editor/refs.ts");
mkSimpleTask('build/officemix.d.ts', [
    'officemix'
], "officemix/officemix.ts");
mkSimpleTask('build/jsonapi.d.ts', [], "noderunner/jsonapi.ts");
mkSimpleTask('build/client.js', [
    'rt/typings.d.ts',
    'build/jsonapi.d.ts',
    'tools/client.ts'
], "tools/client.ts");
// XXX coarse-grained dependencies here over the whole 'noderunner' directory
mkSimpleTask('build/runner.js', [
    'build/browser.d.ts',
    'rt/typings.d.ts',
    'build/rt.d.ts',
    'build/ast.d.ts',
    'build/libnode.d.ts',
    'noderunner'
], "noderunner/runner.ts");
// XXX same here
mkSimpleTask('build/runner.d.ts', [
    'build/browser.d.ts',
    'rt/typings.d.ts',
    'build/rt.d.ts',
    'build/storage.d.ts',
    'build/libwinRT.d.ts',
    'build/libwab.d.ts',
    'build/libnode.d.ts',
    'build/libcordova.d.ts',
    'runner'
], "runner/refs.ts");
// XXX same here
mkSimpleTask('build/mc.d.ts', [
    'build/browser.d.ts',
    'rt/typings.d.ts',
    'build/rt.d.ts',
    'build/storage.d.ts',
    'mc'
], "mc/refs.ts");


// Now come the rules for files that are obtained by concatenating multiple
// _js_ files into another one. The sequence exactly reproduces what happened
// previously, as there are ordering issues with initialization of global variables
// (unsurprisingly). Here's the semantics of these entries:
// - files ending with ".js" end up as dependencies (either as rule names, or as
//   statically-checked-in files in the repo, such as [langs.js]), and are
//   concatenated in the final file
// - files without an extension generate a dependency on the ".d.ts" rule and
//   the ".js" compiled file ends up in the concatenation
var concatMap = {
    "build/mcrunner.js": [
      "build/rt",
      "build/storage",
      "build/mc",
    ],
    "build/noderunner.js": [
        "build/browser",
        "build/rt",
        "build/ast",
        "build/api.js",
        "generated/langs.js",
        "build/libnode",
        "build/pkgshell.js",
        "build/runner.js",
    ],
    "build/runtime.js": [
        "build/rt",
        "build/storage",
        "build/libwinRT",
        "build/libwab",
        "build/libnode",
        "build/libcordova",
        "build/runner",
    ],
    "build/main.js": [
        "build/rt",
        "build/ast",
        "build/api.js",
        "generated/langs.js",
        "build/storage",
        "build/libwinRT",
        "build/libwab",
        "build/libcordova",
        "build/pkgshell.js",
        "build/editor" ,
    ],
};

// Apparently our node scripts can't run without this line.
var nodePrelude = "var window = {};\n";

Object.keys(concatMap).forEach(function (f) {
    var isJs = function (s) { return s.substr(s.length - 3, 3) == ".js"; };
    var buildDeps = concatMap[f].map(function (x) { if (isJs(x)) return x; else return x + ".d.ts"; });
    var toConcat = concatMap[f].map(function (x) { if (isJs(x)) return x; else return x + ".js"; });
    file(f, buildDeps, function () {
        console.log("[C]", f);
        var bufs = [];
        bufs.push(new Buffer(nodePrelude));
        toConcat.forEach(function (f) {
            bufs.push(fs.readFileSync(f));
        });
        fs.writeFileSync(f, Buffer.concat(bufs));
    });
});

// Our targets are the concatenated files, which are the final result of the
// compilation. We also re-run the CSS prefixes thingy everytime.
task('default', [ 'css-prefixes', 'build/client.js' ].concat(Object.keys(concatMap)), function () {
    console.log("[I] build completed.");
});

task('clean', [], function () {
    // XXX do this in a single call? check out https://github.com/mde/utilities/blob/master/lib/file.js
    generated.forEach(function (f) { jake.rmRf(f); });
    jake.rmRf('build');
});

task('test', [ 'build/client.js', 'default' ], { async: true }, function () {
    console.log("[I] running tests")
    jake.exec([ 'node build/client.js buildtest' ],
      { printStdout: true, printStderr: true },
      function() { complete(); });
});

// this task runs as a "after_success" step in the travis-ci automation
task('upload', [], { async : true }, function() {
  var upload = function (buildVersion) {
    var uploadKey = process.env.TD_UPLOAD_KEY;
    console.log("[I] uploading v" + buildVersion)
    jake.exec([ 'node build/client.js tdupload ' + uploadKey + ' ' + buildVersion ],
      { printStdout: true, printStderr: true },
      function() { complete(); });

  };
  if (!process.env.TRAVIS) {
    if (process.env.TD_UPLOAD_KEY && process.env.TD_UPLOAD_USER) {
      upload(process.env.TD_UPLOAD_USER);
    } else {
      console.log("[I] not in travis, skipping upload");
      complete();
    }
  } else {
    assert(process.env.TRAVIS_BUILD_NUMBER, "missing travis build number");
    assert(process.env.TD_UPLOAD_KEY, "missing touchdevelop upload key");
    var buildVersion = 80000 + parseInt(process.env.TRAVIS_BUILD_NUMBER);
    upload(buildVersion);
  }
})

task('run', [ 'default' ], { async: true }, function (port) {
    port = port || 80;
    jake.exec(
        [ 'node build/noderunner '+port+' silent ' ],
        { printStdout: true, printStderr: true },
        function() { complete(); }
    );
});

task('local', [ 'default' ], { async: true }, function() {
  jake.rmRf('tdserver.js')
  jake.exec(
    [ 'node build/shell.js TD_ALLOW_EDITOR=true TD_LOCAL_EDITOR_PATH=.' ],
    { printStdout: true, printStderr: true },
    function() { complete(); }
  )
})

task('update-docs', [ 'build/client.js', 'default' ], { async: true }, function() {
  jake.exec(
    [ 'node build/client.js updatehelp',
      'node build/client.js updatelang' ],
    { printStdout: true, printStderr: true },
    function() { complete(); }
  )
})

task('nw', [ 'default' ], { async : true }, function() {
  console.log('[I] building nw packages')
  jake.mkdirP('build/nw');
  ['node-webkit/app.html',
   'node-webkit/logo.png',
   'node-webkit/package.json',
   'build/browser.js',
   'build/main.js',
   'build/shell.js',
   'build/runtime.js',
   'css/default.css',
   'css/editor.css'].forEach(function(f) { jake.cpR(f, 'build/nw') })
  var nwBuilder = require('node-webkit-builder');
  var nw = new nwBuilder({
      files: 'build/nw/**',
      platforms: ['win32'], //['osx32', 'osx64', 'win32', 'win64'],
      buildDir: 'build/nw_build',
      cacheDir: 'nw_cache',
  });
  nw.on('log',  console.log);
  nw.build().then(function () {
     console.log('[I] nw packaged');
     complete();
  });
})


// vim: ft=javascript