// Flags: --expose-internals

'use strict';

const common = require('../common');
if (!common.hasCrypto)
  common.skip('missing crypto');
const assert = require('assert');
const h2 = require('http2');
const { kSocket } = require('internal/http2/util');
const Countdown = require('../common/countdown');

{
  const server = h2.createServer();
  server.listen(0, common.mustCall(() => {
    const destroyCallbacks = [
      (client) => client.destroy(),
      (client) => client[kSocket].destroy()
    ];

    const countdown = new Countdown(destroyCallbacks.length, () => {
      server.close();
    });

    destroyCallbacks.forEach((destroyCallback) => {
      const client = h2.connect(`http://localhost:${server.address().port}`);
      client.on('connect', common.mustCall(() => {
        const socket = client[kSocket];

        assert(socket, 'client session has associated socket');
        assert(
          !client.destroyed,
          'client has not been destroyed before destroy is called'
        );
        assert(
          !socket.destroyed,
          'socket has not been destroyed before destroy is called'
        );

        destroyCallback(client);

        client.on('close', common.mustCall(() => {
          assert(client.destroyed);
        }));

        countdown.dec();
      }));
    });
  }));
}

// test destroy before client operations
{
  const server = h2.createServer();
  server.listen(0, common.mustCall(() => {
    const client = h2.connect(`http://localhost:${server.address().port}`);
    const socket = client[kSocket];
    socket.on('close', common.mustCall(() => {
      assert(socket.destroyed);
    }));

    const req = client.request();
    req.on('error', common.expectsError({
      code: 'ERR_HTTP2_STREAM_CANCEL',
      type: Error,
      message: 'The pending stream has been canceled'
    }));

    client.destroy();

    req.on('response', common.mustNotCall());

    const sessionError = {
      type: Error,
      code: 'ERR_HTTP2_INVALID_SESSION',
      message: 'The session has been destroyed'
    };

    common.expectsError(() => client.setNextStreamID(), sessionError);
    common.expectsError(() => client.ping(), sessionError);
    common.expectsError(() => client.settings({}), sessionError);
    common.expectsError(() => client.goaway(), sessionError);
    common.expectsError(() => client.request(), sessionError);
    client.close();  // should be a non-op at this point

    // Wait for setImmediate call from destroy() to complete
    // so that state.destroyed is set to true
    setImmediate(() => {
      common.expectsError(() => client.setNextStreamID(), sessionError);
      common.expectsError(() => client.ping(), sessionError);
      common.expectsError(() => client.settings({}), sessionError);
      common.expectsError(() => client.goaway(), sessionError);
      common.expectsError(() => client.request(), sessionError);
      client.close();  // should be a non-op at this point
    });

    req.resume();
    req.on('end', common.mustCall());
    req.on('close', common.mustCall(() => server.close()));
  }));
}

// test destroy before goaway
{
  const server = h2.createServer();
  server.on('stream', common.mustCall((stream) => {
    stream.session.destroy();
  }));

  server.listen(0, common.mustCall(() => {
    const client = h2.connect(`http://localhost:${server.address().port}`);

    client.on('close', () => {
      server.close();
      // calling destroy in here should not matter
      client.destroy();
    });

    client.request();
  }));
}

// test destroy before connect
{
  const server = h2.createServer();
  server.on('stream', common.mustNotCall());

  server.listen(0, common.mustCall(() => {
    const client = h2.connect(`http://localhost:${server.address().port}`);

    server.on('connection', common.mustCall(() => {
      server.close();
      client.close();
    }));

    const req = client.request();
    req.destroy();
  }));
}

// test close before connect
{
  const server = h2.createServer();

  server.on('stream', common.mustNotCall());
  server.listen(0, common.mustCall(() => {
    const client = h2.connect(`http://localhost:${server.address().port}`);
    const socket = client[kSocket];
    socket.on('close', common.mustCall(() => {
      assert(socket.destroyed);
    }));

    const req = client.request();
    // should throw goaway error
    req.on('error', common.expectsError({
      code: 'ERR_HTTP2_GOAWAY_SESSION',
      type: Error,
      message: 'New streams cannot be created after receiving a GOAWAY'
    }));

    client.close();
    req.resume();
    req.on('end', common.mustCall());
    req.on('close', common.mustCall(() => server.close()));
  }));
}