{ stdenv, fetchFromGitHub, pythonPackages
, unzip, makeWrapper }:
let
  inherit (pythonPackages) python;
  docker_1_10 = pythonPackages.buildPythonPackage rec {
    name = "docker-${version}";
    version = "1.10.6";

    src = fetchFromGitHub {
      owner = "docker";
      repo = "docker-py";
      rev = version;
      sha256 = "1awzpbrkh4fympqzddz5i3ml81b7f0i0nwkvbpmyxjjfqx6l0m4m";
    };

    propagatedBuildInputs = with pythonPackages; [
      six
      requests
      websocket_client
      ipaddress
      backports_ssl_match_hostname
      docker_pycreds
      uptime
    ];

    # due to flake8
    doCheck = false;
  };

in stdenv.mkDerivation rec {
  version = "5.11.2";
  name = "dd-agent-${version}";

  src = fetchFromGitHub {
    owner  = "datadog";
    repo   = "dd-agent";
    rev    = version;
    sha256 = "1iqxvgpsqibqw3vk79158l2pnb6y4pjhjp2d6724lm5rpz4825lx";
  };

  patches = [ ./40103-iostat-fix.patch ];

  buildInputs = [
    python
    unzip
    makeWrapper
    pythonPackages.requests
    pythonPackages.psycopg2
    pythonPackages.psutil
    pythonPackages.ntplib
    pythonPackages.simplejson
    pythonPackages.pyyaml
    pythonPackages.pymongo_2_9_1
    pythonPackages.python-etcd
    pythonPackages.consul
    docker_1_10
  ];
  propagatedBuildInputs = with pythonPackages; [ python tornado ];

  buildCommand = ''
    mkdir -p $out/bin
    cp -R $src $out/agent
    chmod u+w -R $out
    (cd $out/agent; patchPhase)
    PYTHONPATH=$out/agent:$PYTHONPATH
    ln -s $out/agent/agent.py $out/bin/dd-agent
    ln -s $out/agent/dogstatsd.py $out/bin/dogstatsd
    ln -s $out/agent/ddagent.py $out/bin/dd-forwarder

    # Move out default conf.d so that /etc/dd-agent/conf.d is used
    mv $out/agent/conf.d $out/agent/conf.d-system

    cat > $out/bin/dd-jmxfetch <<EOF
    #!/usr/bin/env bash
    exec ${python}/bin/python $out/agent/jmxfetch.py $@
    EOF
    chmod a+x $out/bin/dd-jmxfetch

    wrapProgram $out/bin/dd-forwarder \
      --prefix PYTHONPATH : $PYTHONPATH
    wrapProgram $out/bin/dd-agent \
      --prefix PYTHONPATH : $PYTHONPATH
    wrapProgram $out/bin/dogstatsd \
      --prefix PYTHONPATH : $PYTHONPATH
    wrapProgram $out/bin/dd-jmxfetch \
      --prefix PYTHONPATH : $PYTHONPATH

    patchShebangs $out
  '';

  meta = {
    description = ''
      Event collector for the DataDog analysis service
      -- v5 Python implementation
    '';
    homepage    = https://www.datadoghq.com;
    license     = stdenv.lib.licenses.bsd3;
    platforms   = stdenv.lib.platforms.all;
    maintainers = with stdenv.lib.maintainers; [ thoughtpolice domenkozar ];
  };
}