/*global describe, before, it, afterEach, beforeEach */
var fs = require('fs');
var path = require('path');
var util = require('util');
var events = require('events');
var assert = require('assert');
var proxyquire = require('proxyquire');
var generators = require('../');
var EventEmitter = require('events').EventEmitter;
var win32 = process.platform === 'win32';


describe('yeoman.generators.Base', function () {
  before(generators.test.before(path.join(__dirname, 'temp')));

  before(function () {
    function Dummy() {
      generators.Base.apply(this, arguments);
    }

    util.inherits(Dummy, generators.Base);

    Dummy.prototype.test = function () {
      this.shouldRun = true;
    };

    var env = this.env = generators();
    env.register(Dummy, 'dummy');
    this.dummy = env.create('dummy');

    this.fixtures = path.join(__dirname, 'fixtures');
  });

  it('generator.prompt(defaults, prompts, cb)', function (done) {
    this.dummy.prompt([], function () {
      done();
    });
  });

  describe('generator.sourceRoot(root)', function () {
    it('should update the "_sourceRoot" property when root is given', function () {
      this.dummy.sourceRoot(this.fixtures);
      assert.equal(this.dummy._sourceRoot, this.fixtures);
    });

    it('should return the updated or current value of "_sourceRoot"', function () {
      assert.equal(this.dummy.sourceRoot(), this.fixtures);
    });
  });

  describe('generator.destinationRoot(root)', function () {
    it('should update the "_destinationRoot" property when root is given', function () {
      this.dummy.destinationRoot('.');
      assert.equal(this.dummy._destinationRoot, process.cwd());
    });

    it('should return the updated or current value of "_destinationRoot"', function () {
      assert.equal(this.dummy.destinationRoot(), process.cwd());
    });
  });

  describe('generator.cacheRoot()', function () {
    it('should show the cache root where yeoman stores all temp files, on a platform that follows XDG', function () {
      process.env.XDG_CACHE_HOME = '.';
      assert.equal(this.dummy.cacheRoot(), path.join(process.env.XDG_CACHE_HOME, 'yeoman'));
    });

    it('should show the cache root where yeoman stores all temp files, on a plateform that doesn\'t follow XDG', function () {
      if (process.env.XDG_CACHE_HOME) {
        delete process.env.XDG_CACHE_HOME;
      }
      assert.equal(this.dummy.cacheRoot(), path.join(process.env[win32 ? 'USERPROFILE' : 'HOME'], '.cache/yeoman'));
    });
  });

  describe('generator.copy(source, destination, process)', function () {
    before(function (done) {
      this.dummy.copy(path.join(__dirname, 'fixtures/foo.js'), 'write/to/bar.js');
      this.dummy.copy('foo.js', 'write/to/foo.js');
      this.dummy.copy('foo-copy.js');
      this.dummy.copy('yeoman-logo.png');
      this.dummy.copy(path.join(__dirname, 'fixtures/lodash-copy.js'), 'write/to/lodash.js');
      this.dummy.copy('foo-process.js', 'write/to/foo-process.js', function (contents, source, destination, props) {
        contents = contents.replace('foo', 'bar');
        contents = contents.replace('\r\n', '\n');

        return contents;
      });
      this.dummy.conflicter.resolve(done);
    });

    it('should copy source files relative to the "sourceRoot" value', function (done) {
      fs.stat('write/to/foo.js', done);
    });

    it('should allow absolute path, and prevent the relative paths join', function (done) {
      fs.stat('write/to/bar.js', done);
    });

    it('should allow to copy without using the templating (conficting with lodash/underscore)', function (done) {
      fs.stat('write/to/lodash.js', done);
    });

    it('should default the destination to the source filepath value', function (done) {
      fs.stat('foo-copy.js', done);
    });

    it('should retain executable mode on copied files', function (done) {
      fs.stat('write/to/bar.js', function (err, stats) {
        assert(stats.mode & 1 === 1, 'File should be executable.');
        done();
      });
    });

    it('should process source contents via function', function (done) {
      fs.readFile('write/to/foo-process.js', function (err, data) {
        if (err) throw err;
        assert.equal(data, 'var bar = \'foo\';\n');
        done();
      });
    });

    it('should not give a conflict on same binary files', function (done) {
       this.dummy.conflicter.force = true;
       this.dummy.conflicter.collision('yeoman-logo.png', fs.readFileSync(path.join(this.fixtures, 'yeoman-logo.png')), function (status) {
           assert.equal(status, 'identical');
           this.dummy.conflicter.force = false;
           done();
       }.bind(this));
    });
  });

  describe('generator.read(filepath, encoding)', function () {
    it('should read files relative to the "sourceRoot" value', function () {
      var body = this.dummy.read('foo.js');
      assert.equal(body, 'var foo = \'foo\';' + '\n');
    });
    it('should allow absolute path, and prevent the relative paths join', function () {
      var body = this.dummy.read(path.join(__dirname, 'fixtures/foo.js'));
      assert.equal(body, 'var foo = \'foo\';' + '\n');
    });
  });

  describe('generator.write(filepath, content)', function () {
    before(function (done) {
      this.body = 'var bar = \'bar\';' + '\n';
      this.dummy.write('write/to/foobar.js', this.body);
      this.dummy.conflicter.resolve(done);
    });

    it('should write the specified files relative to the "destinationRoot" value', function (done) {
      var body = this.body;
      fs.readFile('write/to/foobar.js', 'utf8', function (err, actual) {
        if (err) {
          return done(err);
        }
        assert.ok(actual, body);
        done();
      });
    });
  });

  describe('generator.template(source, destination, data)', function () {
    before(function (done) {
      this.dummy.foo = 'fooooooo';
      this.dummy.template('foo-template.js', 'write/to/from-template.js');
      this.dummy.template('foo-template.js');
      this.dummy.template('foo-template.js', 'write/to/from-template-bar.js', {
        foo: 'bar'
      });
      this.dummy.template('foo-template.js', 'write/to/from-template.js');
      this.dummy.conflicter.resolve(done);
    });

    it('should copy and process source file to destination', function (done) {
      fs.stat('write/to/from-template.js', done);
    });

    it('should defaults the destination to the source filepath value, relative to "destinationRoot" value', function () {
      var body = fs.readFileSync('foo-template.js', 'utf8');
      assert.equal(body, 'var fooooooo = \'fooooooo\';' + '\n');
    });

    it('should process underscore templates with the passed-in data', function () {
      var body = fs.readFileSync('write/to/from-template-bar.js', 'utf8');
      assert.equal(body, 'var bar = \'bar\';' + '\n');
    });

    it('should process underscore templates with the actual generator instance, when no data is given', function () {
      var body = fs.readFileSync('write/to/from-template.js', 'utf8');
      assert.equal(body, 'var fooooooo = \'fooooooo\';' + '\n');
    });
  });

  describe('generator.directory(source, destination, process)', function () {
    before(function (done) {
      // avoid hitting conflict state in this configuration for now
      if (fs.existsSync('foo.js')) {
        fs.unlinkSync('foo.js');
      }

      // avoid hitting conflict state in this configuration for now
      if (fs.existsSync('foo-template.js')) {
        fs.unlinkSync('foo-template.js');
      }

      // avoid hitting conflict state in this configuration for now
      if (fs.existsSync('yeoman-logo.png')) {
        fs.unlinkSync('yeoman-logo.png');
      }

      this.dummy.directory('./', 'directory');
      this.dummy.directory('./');
      this.dummy.directory('./', 'directory-processed', function (contents, source, destination, props) {
        if (source.indexOf('foo-process.js') !== -1) {
          contents = contents.replace('foo', 'bar');
          contents = contents.replace('\r\n', '\n');
        }

        return contents;
      });
      this.dummy.conflicter.resolve(done);
    });

    it('should copy and process source files to destination', function (done) {
      fs.stat('directory/foo-template.js', function (err) {
        if (err) {
          return done(err);
        }
        fs.stat('directory/foo.js', done);
      });
    });

    it('should defaults the destination to the source filepath value, relative to "destinationRoot" value', function (done) {
      fs.stat('foo-template.js', function (err) {
        if (err) {
          return done(err);
        }
        fs.stat('foo.js', done);
      });
    });

    it('should process underscore templates with the actual generator instance', function () {
      var body = fs.readFileSync('directory/foo-template.js', 'utf8');
      var foo = this.dummy.foo;
      assert.equal(body, 'var ' + foo + ' = \'' + foo + '\';\n');
    });

    it('should process source contents via function', function () {
      var body = fs.readFileSync('directory-processed/foo-process.js', 'utf8');
      assert.equal(body, 'var bar = \'foo\';\n');
    });
  });

  describe('actions/install', function () {
    var asyncStub = {
      on: function (key, cb) {
        if (key === 'exit') {
          cb();
        }
        return asyncStub;
      }
    };

    describe('generator.bowerInstall', function () {

      beforeEach(function () {
        // Keep track of all commands executed by spawnCommand.
        this.commandsRun = [];
        this.dummy.spawnCommand = function spawnCommand(cmd, args) {
          this.commandsRun.push([cmd, args]);
          return asyncStub;
        }.bind(this);
      });

      afterEach(function () {
        // Restore the original function.
        var spawn = require('../lib/actions/spawn_command');
        this.dummy._.extend(this.dummy, spawn);
      });

      it('should spawn a bower process', function (done) {
        this.dummy.bowerInstall(null, done);
        assert(this.commandsRun.length, 1);
        assert.deepEqual(this.commandsRun[0], ['bower', ['install']]);
      });

      it('should spawn a bower process with formatted options', function (done) {
        this.dummy.bowerInstall('jquery', { saveDev: true }, done);
        assert(this.commandsRun.length, 1);
        assert.deepEqual(this.commandsRun[0], ['bower', ['install', 'jquery', '--save-dev']]);
      });
    });

    describe('generator.installDependencies', function () {

      beforeEach(function () {
        // Keep track of all commands executed by spawnCommand.
        this.commandsRun = [];
        this.dummy.spawnCommand = function spawnCommand(cmd, args) {
          this.commandsRun.push(cmd);
          return asyncStub;
        }.bind(this);
      });

      afterEach(function () {
        // Restore the original function.
        var spawn = require('../lib/actions/spawn_command');
        this.dummy._.extend(this.dummy, spawn);
      });

      it('should spawn npm and bower', function () {
        this.dummy.installDependencies();
        assert.deepEqual(this.commandsRun, ['bower', 'npm']);
      });

      it('should not spawn anything with skipInstall', function () {
        this.dummy.installDependencies({ skipInstall: true });
        assert.deepEqual(this.commandsRun.length, 0);
      });

      it('npmInstall should run without callback', function () {
        this.dummy.npmInstall('yo', { save: true });
        assert.deepEqual(this.commandsRun.length, 1);
      });

      it('should execute a callback after installs', function () {
        var called = false;
        this.dummy.installDependencies({
          callback: function () {
            called = true;
          }
        });
        assert.deepEqual(this.commandsRun, ['bower', 'npm']);
        assert(called);
      });

      it('should accept and execute a function as its only argument', function () {
        var called = false;
        this.dummy.installDependencies(function () {
          called = true;
        });
        assert.deepEqual(this.commandsRun, ['bower', 'npm']);
        assert(called);
      });
    });
  });

  describe('generator.expandFiles', function () {
    before(function (done) {
      this.dummy.copy('foo.js', 'write/abc/abc.js');
      this.dummy.conflicter.resolve(done);
    });
    it('should return expand files', function () {
      var files = this.dummy.expandFiles('write/abc/**');
      assert.deepEqual(files, ['write/abc/abc.js']);
    });
    it('should return expand files', function () {
      var files = this.dummy.expandFiles('abc/**', {cwd: './write'});
      assert.deepEqual(files, ['abc/abc.js']);
    });
  });
});