const ChildProcess = require('child_process');
const chai = require('chai');
const { expect } = chai;
const dirtyChai = require('dirty-chai');
const fs = require('fs');
const path = require('path');
const os = require('os');
const { ipcRenderer, remote } = require('electron');
const features = process.electronBinding('features');

const { emittedOnce } = require('./events-helpers');

const isCI = remote.getGlobal('isCi');
chai.use(dirtyChai);

describe('node feature', () => {
  const fixtures = path.join(__dirname, 'fixtures');

  describe('child_process', () => {
    beforeEach(function () {
      if (!features.isRunAsNodeEnabled()) {
        this.skip();
      }
    });

    describe('child_process.fork', () => {
      it('works in current process', (done) => {
        const child = ChildProcess.fork(path.join(fixtures, 'module', 'ping.js'));
        child.on('message', msg => {
          expect(msg).to.equal('message');
          done();
        });
        child.send('message');
      });

      it('preserves args', (done) => {
        const args = ['--expose_gc', '-test', '1'];
        const child = ChildProcess.fork(path.join(fixtures, 'module', 'process_args.js'), args);
        child.on('message', (msg) => {
          expect(args).to.deep.equal(msg.slice(2));
          done();
        });
        child.send('message');
      });

      it('works in forked process', (done) => {
        const child = ChildProcess.fork(path.join(fixtures, 'module', 'fork_ping.js'));
        child.on('message', (msg) => {
          expect(msg).to.equal('message');
          done();
        });
        child.send('message');
      });

      it('works in forked process when options.env is specifed', (done) => {
        const child = ChildProcess.fork(path.join(fixtures, 'module', 'fork_ping.js'), [], {
          path: process.env['PATH']
        });
        child.on('message', (msg) => {
          expect(msg).to.equal('message');
          done();
        });
        child.send('message');
      });

      it('works in browser process', (done) => {
        const fork = remote.require('child_process').fork;
        const child = fork(path.join(fixtures, 'module', 'ping.js'));
        child.on('message', (msg) => {
          expect(msg).to.equal('message');
          done();
        });
        child.send('message');
      });

      it('has String::localeCompare working in script', (done) => {
        const child = ChildProcess.fork(path.join(fixtures, 'module', 'locale-compare.js'));
        child.on('message', (msg) => {
          expect(msg).to.deep.equal([0, -1, 1]);
          done();
        });
        child.send('message');
      });

      it('has setImmediate working in script', (done) => {
        const child = ChildProcess.fork(path.join(fixtures, 'module', 'set-immediate.js'));
        child.on('message', (msg) => {
          expect(msg).to.equal('ok');
          done();
        });
        child.send('message');
      });

      it('pipes stdio', (done) => {
        const child = ChildProcess.fork(path.join(fixtures, 'module', 'process-stdout.js'), { silent: true });
        let data = '';
        child.stdout.on('data', (chunk) => {
          data += String(chunk);
        });
        child.on('close', (code) => {
          expect(code).to.equal(0);
          expect(data).to.equal('pipes stdio');
          done();
        });
      });

      it('works when sending a message to a process forked with the --eval argument', (done) => {
        const source = "process.on('message', (message) => { process.send(message) })";
        const forked = ChildProcess.fork('--eval', [source]);
        forked.once('message', (message) => {
          expect(message).to.equal('hello');
          done();
        });
        forked.send('hello');
      });

      it('has the electron version in process.versions', (done) => {
        const source = 'process.send(process.versions)';
        const forked = ChildProcess.fork('--eval', [source]);
        forked.on('message', (message) => {
          expect(message)
            .to.have.own.property('electron')
            .that.is.a('string')
            .and.matches(/^\d+\.\d+\.\d+(\S*)?$/);
          done();
        });
      });
    });

    describe('child_process.spawn', () => {
      let child;

      afterEach(() => {
        if (child != null) child.kill();
      });

      it('supports spawning Electron as a node process via the ELECTRON_RUN_AS_NODE env var', (done) => {
        child = ChildProcess.spawn(process.execPath, [path.join(__dirname, 'fixtures', 'module', 'run-as-node.js')], {
          env: {
            ELECTRON_RUN_AS_NODE: true
          }
        });

        let output = '';
        child.stdout.on('data', data => {
          output += data;
        });
        child.stdout.on('close', () => {
          expect(JSON.parse(output)).to.deep.equal({
            processLog: process.platform === 'win32' ? 'function' : 'undefined',
            processType: 'undefined',
            window: 'undefined'
          });
          done();
        });
      });

      it('doesnt crash for locale that has missing resource from icu', (done) => {
        child = ChildProcess.spawn(process.execPath, [path.join(__dirname, 'fixtures', 'module', 'icu.js')], {
          env: {
            ELECTRON_RUN_AS_NODE: true,
            LC_ALL: 'ja'
          }
        });

        let output = '';
        child.stdout.on('data', data => {
          output += data;
        });
        child.stdout.on('close', () => {
          expect(output).to.not.be.null();
          done();
        });
      });

      it('doesnt crash for locale of the format aa@BB', (done) => {
        child = ChildProcess.spawn(process.execPath, [path.join(__dirname, 'fixtures', 'module', 'icu.js')], {
          env: {
            ELECTRON_RUN_AS_NODE: true,
            LC_ALL: 'fr@EURO'
          }
        });

        let output = '';
        child.stdout.on('data', data => {
          output += data;
        });
        child.stdout.on('close', () => {
          expect(output).to.not.be.null();
          done();
        });
      });
    });

    describe('child_process.exec', () => {
      (process.platform === 'linux' ? it : it.skip)('allows executing a setuid binary from non-sandboxed renderer', () => {
        // Chrome uses prctl(2) to set the NO_NEW_PRIVILEGES flag on Linux (see
        // https://github.com/torvalds/linux/blob/40fde647cc/Documentation/userspace-api/no_new_privs.rst).
        // We disable this for unsandboxed processes, which the remote tests
        // are running in. If this test fails with an error like 'effective uid
        // is not 0', then it's likely that our patch to prevent the flag from
        // being set has become ineffective.
        const stdout = ChildProcess.execSync('sudo --help');
        expect(stdout).to.not.be.empty();
      });
    });
  });

  describe('contexts', () => {
    describe('setTimeout in fs callback', () => {
      it('does not crash', (done) => {
        fs.readFile(__filename, () => {
          setTimeout(done, 0);
        });
      });
    });

    describe('error thrown in renderer process node context', () => {
      it('gets emitted as a process uncaughtException event', (done) => {
        const error = new Error('boo!');
        const listeners = process.listeners('uncaughtException');
        process.removeAllListeners('uncaughtException');
        process.on('uncaughtException', (thrown) => {
          try {
            expect(thrown).to.equal(error);
            done();
          } catch (e) {
            done(e);
          } finally {
            process.removeAllListeners('uncaughtException');
            listeners.forEach((listener) => process.on('uncaughtException', listener));
          }
        });
        fs.readFile(__filename, () => {
          throw error;
        });
      });
    });

    describe('error thrown in main process node context', () => {
      it('gets emitted as a process uncaughtException event', () => {
        const error = ipcRenderer.sendSync('handle-uncaught-exception', 'hello');
        expect(error).to.equal('hello');
      });
    });

    describe('promise rejection in main process node context', () => {
      it('gets emitted as a process unhandledRejection event', () => {
        const error = ipcRenderer.sendSync('handle-unhandled-rejection', 'hello');
        expect(error).to.equal('hello');
      });
    });

    describe('setTimeout called under Chromium event loop in browser process', () => {
      it('can be scheduled in time', (done) => {
        remote.getGlobal('setTimeout')(done, 0);
      });

      it('can be promisified', (done) => {
        remote.getGlobal('setTimeoutPromisified')(0).then(done);
      });
    });

    describe('setTimeout called under blink env in renderer process', () => {
      it('can be scheduled in time', (done) => {
        setTimeout(done, 10);
      });

      it('works from the timers module', (done) => {
        require('timers').setTimeout(done, 10);
      });
    });

    describe('setInterval called under Chromium event loop in browser process', () => {
      it('can be scheduled in time', (done) => {
        let interval = null;
        let clearing = false;
        const clear = () => {
          if (interval === null || clearing) return;

          // interval might trigger while clearing (remote is slow sometimes)
          clearing = true;
          remote.getGlobal('clearInterval')(interval);
          clearing = false;
          interval = null;
          done();
        };
        interval = remote.getGlobal('setInterval')(clear, 10);
      });
    });

    describe('setInterval called under blink env in renderer process', () => {
      it('can be scheduled in time', (done) => {
        let interval = null;
        let clearing = false;
        const clear = () => {
          if (interval === null || clearing) return;

          // interval might trigger while clearing (remote is slow sometimes)
          clearing = true;
          clearInterval(interval);
          clearing = false;
          interval = null;
          done();
        };
        interval = setInterval(clear, 10);
      });

      it('can be scheduled in time from timers module', (done) => {
        let interval = null;
        let clearing = false;
        const clear = () => {
          if (interval === null || clearing) return;

          // interval might trigger while clearing (remote is slow sometimes)
          clearing = true;
          require('timers').clearInterval(interval);
          clearing = false;
          interval = null;
          done();
        };
        interval = require('timers').setInterval(clear, 10);
      });
    });
  });

  describe('inspector', () => {
    let child = null;
    let exitPromise = null;

    beforeEach(function () {
      if (!features.isRunAsNodeEnabled()) {
        this.skip();
      }
    });

    afterEach(async () => {
      if (child && exitPromise) {
        const [code, signal] = await exitPromise;
        expect(signal).to.equal(null);
        expect(code).to.equal(0);
      } else if (child) {
        child.kill();
      }
    });

    it('supports starting the v8 inspector with --inspect/--inspect-brk', (done) => {
      child = ChildProcess.spawn(process.execPath, ['--inspect-brk', path.join(__dirname, 'fixtures', 'module', 'run-as-node.js')], {
        env: {
          ELECTRON_RUN_AS_NODE: true
        }
      });

      let output = '';
      function cleanup () {
        child.stderr.removeListener('data', errorDataListener);
        child.stdout.removeListener('data', outDataHandler);
      }
      function errorDataListener (data) {
        output += data;
        if (output.trim().startsWith('Debugger listening on ws://')) {
          cleanup();
          done();
        }
      }
      function outDataHandler (data) {
        cleanup();
        done(new Error(`Unexpected output: ${data.toString()}`));
      }
      child.stderr.on('data', errorDataListener);
      child.stdout.on('data', outDataHandler);
    });

    it('supports starting the v8 inspector with --inspect and a provided port', (done) => {
      child = ChildProcess.spawn(process.execPath, ['--inspect=17364', path.join(__dirname, 'fixtures', 'module', 'run-as-node.js')], {
        env: {
          ELECTRON_RUN_AS_NODE: true
        }
      });
      exitPromise = emittedOnce(child, 'exit');

      let output = '';
      function cleanup () {
        child.stderr.removeListener('data', errorDataListener);
        child.stdout.removeListener('data', outDataHandler);
      }
      function errorDataListener (data) {
        output += data;
        if (output.trim().startsWith('Debugger listening on ws://')) {
          expect(output.trim()).to.contain(':17364', 'should be listening on port 17364');
          cleanup();
          done();
        }
      }
      function outDataHandler (data) {
        cleanup();
        done(new Error(`Unexpected output: ${data.toString()}`));
      }
      child.stderr.on('data', errorDataListener);
      child.stdout.on('data', outDataHandler);
    });

    it('does not start the v8 inspector when --inspect is after a -- argument', (done) => {
      child = ChildProcess.spawn(remote.process.execPath, [path.join(__dirname, 'fixtures', 'module', 'noop.js'), '--', '--inspect']);
      exitPromise = emittedOnce(child, 'exit');

      let output = '';
      function dataListener (data) {
        output += data;
      }
      child.stderr.on('data', dataListener);
      child.stdout.on('data', dataListener);
      child.on('exit', () => {
        if (output.trim().startsWith('Debugger listening on ws://')) {
          done(new Error('Inspector was started when it should not have been'));
        } else {
          done();
        }
      });
    });

    it('does does not crash when quitting with the inspector connected', function (done) {
      // IPC Electron child process not supported on Windows
      if (process.platform === 'win32') return this.skip();
      child = ChildProcess.spawn(remote.process.execPath, [path.join(__dirname, 'fixtures', 'module', 'delay-exit'), '--inspect=0'], {
        stdio: ['ipc']
      });
      exitPromise = emittedOnce(child, 'exit');

      let output = '';
      function dataListener (data) {
        output += data;

        if (output.trim().indexOf('Debugger listening on ws://') > -1 && output.indexOf('\n') > -1) {
          const socketMatch = output.trim().match(/(ws:\/\/.+:[0-9]+\/.+?)\n/gm);
          if (socketMatch && socketMatch[0]) {
            child.stderr.removeListener('data', dataListener);
            child.stdout.removeListener('data', dataListener);
            const connection = new WebSocket(socketMatch[0]);
            connection.onopen = () => {
              child.send('plz-quit');
              connection.close();
              done();
            };
          }
        }
      }
      child.stderr.on('data', dataListener);
      child.stdout.on('data', dataListener);
    });

    it('supports js binding', (done) => {
      child = ChildProcess.spawn(process.execPath, ['--inspect', path.join(__dirname, 'fixtures', 'module', 'inspector-binding.js')], {
        env: {
          ELECTRON_RUN_AS_NODE: true
        },
        stdio: ['ipc']
      });
      exitPromise = emittedOnce(child, 'exit');

      child.on('message', ({ cmd, debuggerEnabled, success }) => {
        if (cmd === 'assert') {
          expect(debuggerEnabled).to.be.true();
          expect(success).to.be.true();
          done();
        }
      });
    });
  });

  describe('message loop', () => {
    describe('process.nextTick', () => {
      it('emits the callback', (done) => process.nextTick(done));

      it('works in nested calls', (done) => {
        process.nextTick(() => {
          process.nextTick(() => process.nextTick(done));
        });
      });
    });

    describe('setImmediate', () => {
      it('emits the callback', (done) => setImmediate(done));

      it('works in nested calls', (done) => {
        setImmediate(() => {
          setImmediate(() => setImmediate(done));
        });
      });
    });
  });

  describe('net.connect', () => {
    before(function () {
      if (!features.isRunAsNodeEnabled() || process.platform !== 'darwin') {
        this.skip();
      }
    });

    it('emit error when connect to a socket path without listeners', (done) => {
      const socketPath = path.join(os.tmpdir(), 'atom-shell-test.sock');
      const script = path.join(fixtures, 'module', 'create_socket.js');
      const child = ChildProcess.fork(script, [socketPath]);
      child.on('exit', (code) => {
        expect(code).to.equal(0);
        const client = require('net').connect(socketPath);
        client.on('error', (error) => {
          expect(error.code).to.equal('ECONNREFUSED');
          done();
        });
      });
    });
  });

  describe('Buffer', () => {
    it('can be created from WebKit external string', () => {
      const p = document.createElement('p');
      p.innerText = '闲云潭影日悠悠，物换星移几度秋';
      const b = Buffer.from(p.innerText);
      expect(b.toString()).to.equal('闲云潭影日悠悠，物换星移几度秋');
      expect(Buffer.byteLength(p.innerText)).to.equal(45);
    });

    it('correctly parses external one-byte UTF8 string', () => {
      const p = document.createElement('p');
      p.innerText = 'Jøhänñéß';
      const b = Buffer.from(p.innerText);
      expect(b.toString()).to.equal('Jøhänñéß');
      expect(Buffer.byteLength(p.innerText)).to.equal(13);
    });

    it('does not crash when creating large Buffers', () => {
      let buffer = Buffer.from(new Array(4096).join(' '));
      expect(buffer.length).to.equal(4095);
      buffer = Buffer.from(new Array(4097).join(' '));
      expect(buffer.length).to.equal(4096);
    });

    it('does not crash for crypto operations', () => {
      const crypto = require('crypto');
      const data = 'lG9E+/g4JmRmedDAnihtBD4Dfaha/GFOjd+xUOQI05UtfVX3DjUXvrS98p7kZQwY3LNhdiFo7MY5rGft8yBuDhKuNNag9vRx/44IuClDhdQ=';
      const key = 'q90K9yBqhWZnAMCMTOJfPQ==';
      const cipherText = '{"error_code":114,"error_message":"Tham số không hợp lệ","data":null}';
      for (let i = 0; i < 10000; ++i) {
        const iv = Buffer.from('0'.repeat(32), 'hex');
        const input = Buffer.from(data, 'base64');
        const decipher = crypto.createDecipheriv('aes-128-cbc', Buffer.from(key, 'base64'), iv);
        const result = Buffer.concat([decipher.update(input), decipher.final()]).toString('utf8');
        expect(cipherText).to.equal(result);
      }
    });
  });

  describe('process.stdout', () => {
    it('does not throw an exception when accessed', () => {
      expect(() => process.stdout).to.not.throw();
    });

    it('does not throw an exception when calling write()', () => {
      expect(() => {
        process.stdout.write('test');
      }).to.not.throw();
    });

    it('should have isTTY defined on Mac and Linux', function () {
      if (isCI || process.platform === 'win32') {
        this.skip();
        return;
      }

      expect(process.stdout.isTTY).to.be.a('boolean');
    });

    it('should have isTTY undefined on Windows', function () {
      if (isCI || process.platform !== 'win32') {
        this.skip();
        return;
      }

      expect(process.stdout.isTTY).to.be.undefined();
    });
  });

  describe('process.stdin', () => {
    it('does not throw an exception when accessed', () => {
      expect(() => process.stdin).to.not.throw();
    });

    it('returns null when read from', () => {
      expect(process.stdin.read()).to.be.null();
    });
  });

  describe('process.version', () => {
    it('should not have -pre', () => {
      expect(process.version.endsWith('-pre')).to.be.false();
    });
  });

  describe('vm.runInNewContext', () => {
    it('should not crash', () => {
      require('vm').runInNewContext('');
    });
  });

  describe('crypto', () => {
    it('should list the ripemd160 hash in getHashes', () => {
      expect(require('crypto').getHashes()).to.include('ripemd160');
    });

    it('should be able to create a ripemd160 hash and use it', () => {
      const hash = require('crypto').createHash('ripemd160');
      hash.update('electron-ripemd160');
      expect(hash.digest('hex')).to.equal('fa7fec13c624009ab126ebb99eda6525583395fe');
    });

    it('should list aes-{128,256}-cfb in getCiphers', () => {
      expect(require('crypto').getCiphers()).to.include.members(['aes-128-cfb', 'aes-256-cfb']);
    });

    it('should be able to create an aes-128-cfb cipher', () => {
      require('crypto').createCipheriv('aes-128-cfb', '0123456789abcdef', '0123456789abcdef');
    });

    it('should be able to create an aes-256-cfb cipher', () => {
      require('crypto').createCipheriv('aes-256-cfb', '0123456789abcdef0123456789abcdef', '0123456789abcdef');
    });

    it('should list des-ede-cbc in getCiphers', () => {
      expect(require('crypto').getCiphers()).to.include('des-ede-cbc');
    });

    it('should be able to create an des-ede-cbc cipher', () => {
      const key = Buffer.from('0123456789abcdeff1e0d3c2b5a49786', 'hex');
      const iv = Buffer.from('fedcba9876543210', 'hex');
      require('crypto').createCipheriv('des-ede-cbc', key, iv);
    });

    it('should not crash when getting an ECDH key', () => {
      const ecdh = require('crypto').createECDH('prime256v1');
      expect(ecdh.generateKeys()).to.be.an.instanceof(Buffer);
      expect(ecdh.getPrivateKey()).to.be.an.instanceof(Buffer);
    });

    it('should not crash when generating DH keys or fetching DH fields', () => {
      const dh = require('crypto').createDiffieHellman('modp15');
      expect(dh.generateKeys()).to.be.an.instanceof(Buffer);
      expect(dh.getPublicKey()).to.be.an.instanceof(Buffer);
      expect(dh.getPrivateKey()).to.be.an.instanceof(Buffer);
      expect(dh.getPrime()).to.be.an.instanceof(Buffer);
      expect(dh.getGenerator()).to.be.an.instanceof(Buffer);
    });

    it('should not crash when creating an ECDH cipher', () => {
      const crypto = require('crypto');
      const dh = crypto.createECDH('prime256v1');
      dh.generateKeys();
      dh.setPrivateKey(dh.getPrivateKey());
    });
  });

  describe('fs.mkdir/mkdirSync', () => {
    it('does not hang with {recursive: true} on invalid names', function (done) {
      if (process.platform !== 'win32') {
        return this.skip();
      }
      expect(() => fs.mkdirSync('invalid2:', { recursive: true })).to.throw();
      fs.mkdir('invalid1:', { recursive: true }, (err) => {
        expect(err).to.not.be.null();
        done();
      });
    });
  });

  it('includes the electron version in process.versions', () => {
    expect(process.versions)
      .to.have.own.property('electron')
      .that.is.a('string')
      .and.matches(/^\d+\.\d+\.\d+(\S*)?$/);
  });

  it('includes the chrome version in process.versions', () => {
    expect(process.versions)
      .to.have.own.property('chrome')
      .that.is.a('string')
      .and.matches(/^\d+\.\d+\.\d+\.\d+$/);
  });

  it('can find a module using a package.json main field', () => {
    const result = ChildProcess.spawnSync(remote.process.execPath, [path.resolve(fixtures, 'api', 'electron-main-module', 'app.asar')]);
    expect(result.status).to.equal(0);
  });

  it('handles Promise timeouts correctly', (done) => {
    const scriptPath = path.join(fixtures, 'module', 'node-promise-timer.js');
    const child = ChildProcess.spawn(process.execPath, [scriptPath], {
      env: { ELECTRON_RUN_AS_NODE: 'true' }
    });
    emittedOnce(child, 'exit').then(([code, signal]) => {
      expect(code).to.equal(0);
      expect(signal).to.equal(null);
      child.kill();
      done();
    });
  });
});
