require('mocha');
var should = require('should');
var fs = require('graceful-fs');
var path = require('path');
var rimraf = require('rimraf');
var bufEqual = require('buffer-equal');
var through = require('through2');
var File = require('vinyl');
var assemble = require('..');
var spies = require('./support/spy');
var chmodSpy = spies.chmodSpy;
var statSpy = spies.statSpy;
var app, bufferStream;

var wipeOut = function(cb) {
  rimraf(path.join(__dirname, './actual/'), cb);
  spies.setError('false');
  statSpy.reset();
  chmodSpy.reset();
  app = assemble();
};

var dataWrap = function(fn) {
  return function(data, enc, cb) {
    fn(data);
    cb();
  };
};

var realMode = function(n) {
  return n & 07777;
};

describe('symlink stream', function() {
  beforeEach(wipeOut);
  afterEach(wipeOut);

  it('should pass through writes with cwd', function(done) {
    var inputPath = path.join(__dirname, './fixtures/test.coffee');

    var expectedFile = new File({
      base: __dirname,
      cwd: __dirname,
      path: inputPath,
      contents: null
    });

    var onEnd = function(){
      buffered.length.should.equal(1);
      buffered[0].should.equal(expectedFile);
      done();
    };

    var stream = app.symlink('./actual/', {cwd: __dirname});

    var buffered = [];
    bufferStream = through.obj(dataWrap(buffered.push.bind(buffered)), onEnd);
    stream.pipe(bufferStream);
    stream.write(expectedFile);
    stream.end();
  });

  it('should pass through writes with default cwd', function(done) {
    var inputPath = path.join(__dirname, './fixtures/test.coffee');

    var expectedFile = new File({
      base: __dirname,
      cwd: __dirname,
      path: inputPath,
      contents: null
    });

    var onEnd = function(){
      buffered.length.should.equal(1);
      buffered[0].should.equal(expectedFile);
      done();
    };

    var stream = app.symlink(path.join(__dirname, './actual/'));

    var buffered = [];
    bufferStream = through.obj(dataWrap(buffered.push.bind(buffered)), onEnd);
    stream.pipe(bufferStream);
    stream.write(expectedFile);
    stream.end();
  });

  it('should make link to the right folder with relative cwd', function(done) {
    var inputPath = path.join(__dirname, './fixtures/test.coffee');
    var inputBase = path.join(__dirname, './fixtures/');
    var expectedPath = path.join(__dirname, './actual/test.coffee');
    var expectedBase = path.join(__dirname, './actual');
    var expectedContents = fs.readFileSync(inputPath);

    var expectedFile = new File({
      base: inputBase,
      cwd: __dirname,
      path: inputPath,
      contents: expectedContents
    });

    var onEnd = function(){
      buffered.length.should.equal(1);
      buffered[0].should.equal(expectedFile);
      buffered[0].cwd.should.equal(__dirname, 'cwd should have changed');
      buffered[0].base.should.equal(expectedBase, 'base should have changed');
      buffered[0].path.should.equal(expectedPath, 'path should have changed');
      fs.existsSync(expectedPath).should.equal(true);
      bufEqual(fs.readFileSync(expectedPath), expectedContents).should.equal(true);
      fs.readlinkSync(expectedPath).should.equal(inputPath);
      done();
    };

    var stream = app.symlink('./actual/', {cwd: path.relative(process.cwd(), __dirname)});

    var buffered = [];
    bufferStream = through.obj(dataWrap(buffered.push.bind(buffered)), onEnd);
    stream.pipe(bufferStream);
    stream.write(expectedFile);
    stream.end();
  });

  it('should write buffer files to the right folder with function and relative cwd', function(done) {
    var inputPath = path.join(__dirname, './fixtures/test.coffee');
    var inputBase = path.join(__dirname, './fixtures/');
    var expectedPath = path.join(__dirname, './actual/test.coffee');
    var expectedBase = path.join(__dirname, './actual');
    var expectedContents = fs.readFileSync(inputPath);

    var expectedFile = new File({
      base: inputBase,
      cwd: __dirname,
      path: inputPath,
      contents: expectedContents
    });

    var onEnd = function(){
      buffered.length.should.equal(1);
      buffered[0].should.equal(expectedFile);
      buffered[0].cwd.should.equal(__dirname, 'cwd should have changed');
      buffered[0].base.should.equal(expectedBase, 'base should have changed');
      buffered[0].path.should.equal(expectedPath, 'path should have changed');
      fs.existsSync(expectedPath).should.equal(true);
      bufEqual(fs.readFileSync(expectedPath), expectedContents).should.equal(true);
      fs.readlinkSync(expectedPath).should.equal(inputPath);
      done();
    };

    var stream = app.symlink(function(file){
      should.exist(file);
      file.should.equal(expectedFile);
      return './actual';
    }, {cwd: path.relative(process.cwd(), __dirname)});

    var buffered = [];
    bufferStream = through.obj(dataWrap(buffered.push.bind(buffered)), onEnd);
    stream.pipe(bufferStream);
    stream.write(expectedFile);
    stream.end();
  });

  it('should write buffer files to the right folder', function(done) {
    var inputPath = path.join(__dirname, './fixtures/test.coffee');
    var inputBase = path.join(__dirname, './fixtures/');
    var expectedPath = path.join(__dirname, './actual/test.coffee');
    var expectedContents = fs.readFileSync(inputPath);
    var expectedBase = path.join(__dirname, './actual');
    var expectedMode = 0655;

    var expectedFile = new File({
      base: inputBase,
      cwd: __dirname,
      path: inputPath,
      contents: expectedContents,
      stat: {
        mode: expectedMode
      }
    });

    var onEnd = function(){
      buffered.length.should.equal(1);
      buffered[0].should.equal(expectedFile);
      buffered[0].cwd.should.equal(__dirname, 'cwd should have changed');
      buffered[0].base.should.equal(expectedBase, 'base should have changed');
      buffered[0].path.should.equal(expectedPath, 'path should have changed');
      fs.existsSync(expectedPath).should.equal(true);
      bufEqual(fs.readFileSync(expectedPath), expectedContents).should.equal(true);
      fs.readlinkSync(expectedPath).should.equal(inputPath);
      done();
    };

    var stream = app.symlink('./actual/', {cwd: __dirname});

    var buffered = [];
    bufferStream = through.obj(dataWrap(buffered.push.bind(buffered)), onEnd);
    stream.pipe(bufferStream);
    stream.write(expectedFile);
    stream.end();
  });

  it('should write streaming files to the right folder', function(done) {
    var inputPath = path.join(__dirname, './fixtures/test.coffee');
    var inputBase = path.join(__dirname, './fixtures/');
    var expectedPath = path.join(__dirname, './actual/test.coffee');
    var expectedContents = fs.readFileSync(inputPath);
    var expectedBase = path.join(__dirname, './actual');
    var expectedMode = 0655;

    var contentStream = through.obj();
    var expectedFile = new File({
      base: inputBase,
      cwd: __dirname,
      path: inputPath,
      contents: contentStream,
      stat: {
        mode: expectedMode
      }
    });

    var onEnd = function(){
      buffered.length.should.equal(1);
      buffered[0].should.equal(expectedFile);
      buffered[0].cwd.should.equal(__dirname, 'cwd should have changed');
      buffered[0].base.should.equal(expectedBase, 'base should have changed');
      buffered[0].path.should.equal(expectedPath, 'path should have changed');
      fs.existsSync(expectedPath).should.equal(true);
      bufEqual(fs.readFileSync(expectedPath), expectedContents).should.equal(true);
      fs.readlinkSync(expectedPath).should.equal(inputPath);
      done();
    };

    var stream = app.symlink('./actual/', {cwd: __dirname});

    var buffered = [];
    bufferStream = through.obj(dataWrap(buffered.push.bind(buffered)), onEnd);
    stream.pipe(bufferStream);
    stream.write(expectedFile);
    setTimeout(function(){
      contentStream.write(expectedContents);
      contentStream.end();
    }, 100);
    stream.end();
  });

  it('should write directories to the right folder', function(done) {
    var inputPath = path.join(__dirname, './fixtures/wow');
    var inputBase = path.join(__dirname, './fixtures/');
    var expectedPath = path.join(__dirname, './actual/wow');
    var expectedBase = path.join(__dirname, './actual');
    var expectedMode = 0655;

    var expectedFile = new File({
      base: inputBase,
      cwd: __dirname,
      path: inputPath,
      contents: null,
      stat: {
        isDirectory: function(){
          return true;
        },
        mode: expectedMode
      }
    });

    var onEnd = function(){
      buffered.length.should.equal(1);
      buffered[0].should.equal(expectedFile);
      buffered[0].cwd.should.equal(__dirname, 'cwd should have changed');
      buffered[0].base.should.equal(expectedBase, 'base should have changed');
      buffered[0].path.should.equal(expectedPath, 'path should have changed');
      fs.readlinkSync(expectedPath).should.equal(inputPath);
      fs.lstatSync(expectedPath).isDirectory().should.equal(false);
      fs.statSync(expectedPath).isDirectory().should.equal(true);
      done();
    };

    var stream = app.symlink('./actual/', {cwd: __dirname});

    var buffered = [];
    bufferStream = through.obj(dataWrap(buffered.push.bind(buffered)), onEnd);
    stream.pipe(bufferStream);
    stream.write(expectedFile);
    stream.end();
  });

  it('should use different modes for files and directories', function(done) {
    var inputBase = path.join(__dirname, './fixtures');
    var inputPath = path.join(__dirname, './fixtures/wow/suchempty');
    var expectedBase = path.join(__dirname, './actual/wow');
    var expectedDirMode = 0755;
    var expectedFileMode = 0655;

    var firstFile = new File({
      base: inputBase,
      cwd: __dirname,
      path: inputPath,
      stat: fs.statSync(inputPath)
    });

    var onEnd = function(){
      realMode(fs.lstatSync(expectedBase).mode).should.equal(expectedDirMode);
      realMode(buffered[0].stat.mode).should.equal(expectedFileMode);
      done();
    };

    var stream = app.symlink('./actual/', {
      cwd: __dirname,
      mode: expectedFileMode,
      dirMode: expectedDirMode
    });

    var buffered = [];
    bufferStream = through.obj(dataWrap(buffered.push.bind(buffered)), onEnd);

    stream.pipe(bufferStream);
    stream.write(firstFile);
    stream.end();
  });

  it('should change to the specified base', function(done) {
    var inputBase = path.join(__dirname, './fixtures');
    var inputPath = path.join(__dirname, './fixtures/wow/suchempty');

    var firstFile = new File({
      base: inputBase,
      cwd: __dirname,
      path: inputPath,
      stat: fs.statSync(inputPath)
    });

    var onEnd = function(){
      buffered[0].base.should.equal(inputBase);
      done();
    };

    var stream = app.symlink('./actual/', {
      cwd: __dirname,
      base: inputBase
    });

    var buffered = [];
    bufferStream = through.obj(dataWrap(buffered.push.bind(buffered)), onEnd);

    stream.pipe(bufferStream);
    stream.write(firstFile);
    stream.end();
  });

  it('should report IO errors', function(done) {
    var inputPath = path.join(__dirname, './fixtures/test.coffee');
    var inputBase = path.join(__dirname, './fixtures/');
    var expectedContents = fs.readFileSync(inputPath);
    var expectedBase = path.join(__dirname, './actual');
    var expectedMode = 0722;

    var expectedFile = new File({
      base: inputBase,
      cwd: __dirname,
      path: inputPath,
      contents: expectedContents,
      stat: {
        mode: expectedMode
      }
    });

    fs.mkdirSync(expectedBase);
    fs.chmodSync(expectedBase, 0);

    var stream = app.symlink('./actual/', {cwd: __dirname});
    stream.on('error', function(err) {
      err.code.should.equal('EACCES');
      done();
    });
    stream.write(expectedFile);
  });

  ['end', 'finish'].forEach(function(eventName) {
    it('should emit ' + eventName + ' event', function(done) {
      var srcPath = path.join(__dirname, './fixtures/test.coffee');
      var stream = app.symlink('./actual/', {cwd: __dirname});

      stream.on(eventName, function() {
        done();
      });

      var file = new File({
        path: srcPath,
        cwd: __dirname,
        contents: new Buffer("1234567890")
      });

      stream.write(file);
      stream.end();
    });
  });
});