import ./make-test-python.nix ({ pkgs, lib, ... }:

  let
    pgadmin4SrcDir = "/pgadmin";
    pgadmin4Dir = "/var/lib/pgadmin";
    pgadmin4LogDir = "/var/log/pgadmin";

    python-with-needed-packages = pkgs.python3.withPackages (ps: with ps; [
      selenium
      testtools
      testscenarios
      flask
      flask-babelex
      flask-babel
      flask-gravatar
      flask_login
      flask_mail
      flask_migrate
      flask_sqlalchemy
      flask_wtf
      flask-compress
      passlib
      pytz
      simplejson
      six
      sqlparse
      wtforms
      flask-paranoid
      psutil
      psycopg2
      python-dateutil
      sqlalchemy
      itsdangerous
      flask-security-too
      bcrypt
      cryptography
      sshtunnel
      ldap3
      gssapi
      flask-socketio
      eventlet
      httpagentparser
      user-agents
      wheel
      authlib
      qrcode
      pillow
      pyotp
    ]);
  in
  {
    name = "pgadmin4";
    meta.maintainers = with lib.maintainers; [ gador ];

    nodes.machine = { pkgs, ... }: {
      imports = [ ./common/x11.nix ];
      environment.systemPackages = with pkgs; [
        pgadmin4
        postgresql
        python-with-needed-packages
        chromedriver
        chromium
      ];
      services.postgresql = {
        enable = true;
        authentication = ''
          host    all             all             localhost               trust
        '';
        ensureUsers = [
          {
            name = "postgres";
            ensurePermissions = {
              "DATABASE \"postgres\"" = "ALL PRIVILEGES";
            };
          }
        ];
      };
    };

    testScript = ''
      machine.wait_for_unit("postgresql")

      # pgadmin4 needs its data and log directories
      machine.succeed(
          "mkdir -p ${pgadmin4Dir} \
          && mkdir -p ${pgadmin4LogDir} \
          && mkdir -p ${pgadmin4SrcDir}"
      )

      machine.succeed(
           "tar xvzf ${pkgs.pgadmin4.src} -C ${pgadmin4SrcDir}"
      )

      machine.wait_for_file("${pgadmin4SrcDir}/pgadmin4-${pkgs.pgadmin4.version}/README.md")

      # set paths and config for tests
      machine.succeed(
           "cd ${pgadmin4SrcDir}/pgadmin4-${pkgs.pgadmin4.version} \
           && cp -v web/regression/test_config.json.in web/regression/test_config.json \
           && sed -i 's|PostgreSQL 9.4|PostgreSQL|' web/regression/test_config.json \
           && sed -i 's|/opt/PostgreSQL/9.4/bin/|${pkgs.postgresql}/bin|' web/regression/test_config.json \
           && sed -i 's|\"headless_chrome\": false|\"headless_chrome\": true|' web/regression/test_config.json"
      )

      # adapt chrome config to run within a sandbox without GUI
      # see https://stackoverflow.com/questions/50642308/webdriverexception-unknown-error-devtoolsactiveport-file-doesnt-exist-while-t#50642913
      # add chrome binary path. use spaces to satisfy python indention (tabs throw an error)
      # this works for selenium 3 (currently used), but will need to be updated
      # to work with "from selenium.webdriver.chrome.service import Service" in selenium 4
      machine.succeed(
           "cd ${pgadmin4SrcDir}/pgadmin4-${pkgs.pgadmin4.version} \
           && sed -i '\|options.add_argument(\"--disable-infobars\")|a \ \ \ \ \ \ \ \ options.binary_location = \"${pkgs.chromium}/bin/chromium\"' web/regression/runtests.py \
           && sed -i '\|options.add_argument(\"--no-sandbox\")|a \ \ \ \ \ \ \ \ options.add_argument(\"--headless\")' web/regression/runtests.py \
           && sed -i '\|options.add_argument(\"--disable-infobars\")|a \ \ \ \ \ \ \ \ options.add_argument(\"--disable-dev-shm-usage\")' web/regression/runtests.py \
           && sed -i 's|(chrome_options=options)|(executable_path=\"${pkgs.chromedriver}/bin/chromedriver\", chrome_options=options)|' web/regression/runtests.py \
           && sed -i 's|driver_local.maximize_window()||' web/regression/runtests.py"
      )

      # don't bother to test LDAP authentification
      with subtest("run browser test"):
          machine.succeed(
               'cd ${pgadmin4SrcDir}/pgadmin4-${pkgs.pgadmin4.version}/web \
               && ${python-with-needed-packages.interpreter} regression/runtests.py --pkg browser --exclude \
               browser.tests.test_ldap_login.LDAPLoginTestCase,browser.tests.test_ldap_login'
          )

      # fontconfig is necessary for chromium to run
      # https://github.com/NixOS/nixpkgs/issues/136207
      with subtest("run feature test"):
          machine.succeed(
              'cd ${pgadmin4SrcDir}/pgadmin4-${pkgs.pgadmin4.version}/web \
               && export FONTCONFIG_FILE=${pkgs.makeFontsConf { fontDirectories = [];}} \
               && ${python-with-needed-packages.interpreter} regression/runtests.py --pkg feature_tests'
          )

      with subtest("run resql test"):
          machine.succeed(
               'cd ${pgadmin4SrcDir}/pgadmin4-${pkgs.pgadmin4.version}/web \
               && ${python-with-needed-packages.interpreter} regression/runtests.py --pkg resql'
          )
    '';
  })