'use strict';

import destCopy from '../broccoli-dest-copy';
import compileWithTypescript from '../broccoli-typescript';
import transpileWithTraceur from '../traceur/index';
var Funnel = require('broccoli-funnel');
import mergeTrees from '../broccoli-merge-trees';
var path = require('path');
import renderLodashTemplate from '../broccoli-lodash';
import replace from '../broccoli-replace';
var stew = require('broccoli-stew');

var projectRootDir = path.normalize(path.join(__dirname, '..', '..', '..', '..'));


module.exports = function makeNodeTree(destinationPath) {
  // list of npm packages that this build will create
  var outputPackages = ['angular2', 'benchpress', 'rtts_assert'];

  var modulesTree = new Funnel('modules', {
    include: ['angular2/**', 'benchpress/**', 'rtts_assert/**', '**/e2e_test/**'],
    exclude: [
      // the following code and tests are not compatible with CJS/node environment
      'angular2/test/core/zone/**',
      'angular2/test/test_lib/fake_async_spec.ts',
      'angular2/test/render/xhr_impl_spec.ts',
      'angular2/test/forms/**'
    ]
  });

  var nodeTree = transpileWithTraceur(modulesTree, {
    destExtension: '.js',
    destSourceMapExtension: '.map',
    traceurOptions: {
      sourceMaps: true,
      annotations: true,      // parse annotations
      types: true,            // parse types
      script: false,          // parse as a module
      memberVariables: true,  // parse class fields
      typeAssertionModule: 'rtts_assert/rtts_assert',
      // Don't use type assertions since this is partly transpiled by typescript
      typeAssertions: false,
      modules: 'commonjs'
    }
  });

  // Now we add the LICENSE file into all the folders that will become npm packages
  outputPackages.forEach(function(destDir) {
    var license = new Funnel('.', {files: ['LICENSE'], destDir: destDir});
    nodeTree = mergeTrees([nodeTree, license]);
  });

  // Get all docs and related assets and prepare them for js build
  var docs = new Funnel(modulesTree, {include: ['**/*.md', '**/*.png'], exclude: ['**/*.dart.md']});
  docs = stew.rename(docs, 'README.js.md', 'README.md');

  // Generate shared package.json info
  var BASE_PACKAGE_JSON = require(path.join(projectRootDir, 'package.json'));
  var COMMON_PACKAGE_JSON = {
    version: BASE_PACKAGE_JSON.version,
    homepage: BASE_PACKAGE_JSON.homepage,
    bugs: BASE_PACKAGE_JSON.bugs,
    license: BASE_PACKAGE_JSON.license,
    contributors: BASE_PACKAGE_JSON.contributors,
    dependencies: BASE_PACKAGE_JSON.dependencies,
    devDependencies: {
      "yargs": BASE_PACKAGE_JSON.devDependencies['yargs'],
      "gulp-sourcemaps": BASE_PACKAGE_JSON.devDependencies['gulp-sourcemaps'],
      "gulp-traceur": BASE_PACKAGE_JSON.devDependencies['gulp-traceur'],
      "gulp": BASE_PACKAGE_JSON.devDependencies['gulp'],
      "gulp-rename": BASE_PACKAGE_JSON.devDependencies['gulp-rename'],
      "through2": BASE_PACKAGE_JSON.devDependencies['through2']
    }
  };

  var packageJsons = new Funnel(modulesTree, {include: ['**/package.json']});
  packageJsons =
      renderLodashTemplate(packageJsons, {context: {'packageJson': COMMON_PACKAGE_JSON}});

  // HACK: workaround for Traceur behavior.
  // It expects all transpiled modules to contain this marker.
  // TODO: remove this when we no longer use traceur
  var traceurCompatibleTsModulesTree = replace(modulesTree, {
    files: ['**/*.ts'],
    patterns: [
      {
        match: /$/,
        replacement: function(_, relativePath) {
          var content = "";  // we're matching an empty line
          if (!relativePath.endsWith('.d.ts')) {
            content += '\r\nexport var __esModule = true;\n';
          }
          return content;
        }
      }
    ]
  });

  var typescriptTree = compileWithTypescript(traceurCompatibleTsModulesTree, {
    allowNonTsExtensions: false,
    emitDecoratorMetadata: true,
    declaration: true,
    mapRoot: '', /* force sourcemaps to use relative path */
    module: 'commonjs',
    noEmitOnError: true,
    rootDir: '.',
    rootFilePaths: ['angular2/traceur-runtime.d.ts', 'angular2/globals.d.ts'],
    sourceMap: true,
    sourceRoot: '.',
    target: 'ES5'
  });

  nodeTree = mergeTrees([nodeTree, typescriptTree, docs, packageJsons]);

  // Transform all tests to make them runnable in node
  nodeTree = replace(nodeTree, {
    files: ['**/test/**/*_spec.js'],
    patterns: [
      {
        match: /$/,
        replacement: function(_, relativePath) {
          return "\r\n main(); \n\r" +
                 "var parse5Adapter = require('angular2/src/dom/parse5_adapter'); " +
                 "parse5Adapter.Parse5DomAdapter.makeCurrent();";
        }
      }
    ]
  });

  // Prepend 'use strict' directive to all JS files.
  // See https://github.com/Microsoft/TypeScript/issues/3576
  nodeTree = replace(nodeTree, {
    files: ['**/*.js'],
    patterns: [{match: /^/, replacement: function() { return `'use strict';` }}]
  });

  return destCopy(nodeTree, destinationPath);
};