/// <reference path="resolve.d.ts" />

import * as fs from 'fs';
import * as resolve from 'resolve';

function test_basic_async() {
  resolve('typescript', function(error, resolved) {
    if (error) {
      console.error(error.message);
      return;
    }
    console.log(resolved);
  });
}

function test_basic_sync() {
  var resolved = resolve.sync('typescript');
  console.log(resolved);
}

function test_options_async() {
  resolve('typescript', {
    basedir: process.cwd(),
    package: {},
    extensions: ['.js'],
    packageFilter: function(pkg, pkgfile) {
      return pkg;
    },
    pathFilter: function(pkg, path, relativePath) {
      return path
    },
    paths: [process.cwd()],
    moduleDirectory: 'node_modules',
    readFile: fs.readFile,
    isFile: function(file, cb) {
      fs.stat(file, function(error, stat) {
        if (error && error.code === 'ENOENT') {
          return cb(null, false);
        } else if (error) {
          return cb(error);
        } else {
          return cb(null, stat.isFile());
        }
      });
    }
  }, function(error, resolved) {
    if (error) {
      console.error(error.message);
      return;
    }
    console.log(resolved);
  });
}

function test_options_sync() {
  var resolved = resolve.sync('typescript', {
    basedir: process.cwd(),
    package: {},
    extensions: ['.js'],
    packageFilter: function(pkg, pkgfile) {
      return pkg;
    },
    pathFilter: function(pkg, path, relativePath) {
      return path
    },
    paths: [process.cwd()],
    moduleDirectory: 'node_modules',
    readFileSync: fs.readFileSync,
    isFile: function(file) {
      try {
        return fs.statSync(file).isFile();
      } catch (error) {
        return false;
      }
    }
  });
  console.log(resolved);
}

function test_is_core() {
  var fsIsCore = resolve.isCore('fs');
  var typescriptIsCore = resolve.isCore('typescript');
}