{ stdenv, fetchurl, makeWrapper, php }:

let
  versions = {
    matomo = {
      version = "3.13.6";
      sha256 = "1d3s5v96mmhcxdnxi7qh822p55g9a2nxh0zcq2d8bhg0cshi9804";
    };

    matomo-beta = {
      version = "3.13.6";
      # `beta` examples: "b1", "rc1", null
      # TOOD when updating: use null if stable version is >= latest beta or release candidate
      beta = null;
      sha256 = "1d3s5v96mmhcxdnxi7qh822p55g9a2nxh0zcq2d8bhg0cshi9804";
    };
  };
  common = pname: { version, sha256, beta ? null }:
    let
      fullVersion = version + stdenv.lib.optionalString (beta != null) "-${toString beta}";
      name = "${pname}-${fullVersion}";
    in

      stdenv.mkDerivation rec {
        inherit name;
        version = fullVersion;

        src = fetchurl {
          url = "https://builds.matomo.org/matomo-${version}.tar.gz";
          inherit sha256;
        };

        nativeBuildInputs = [ makeWrapper ];

        # make-localhost-default-database-server.patch:
        #   This changes the default value of the database server field
        #   from 127.0.0.1 to localhost.
        #   unix socket authentication only works with localhost,
        #   but password-based SQL authentication works with both.
        # TODO: is upstream interested in this?
        # -> discussion at https://github.com/matomo-org/matomo/issues/12646
        patches = [ ./make-localhost-default-database-host.patch ];

        # this bootstrap.php adds support for getting PIWIK_USER_PATH
        # from an environment variable. Point it to a mutable location
        # to be able to use matomo read-only from the nix store
        postPatch = ''
          cp ${./bootstrap.php} bootstrap.php
        '';

        # TODO: future versions might rename the PIWIK_… variables to MATOMO_…
        # TODO: Move more unnecessary files from share/, especially using PIWIK_INCLUDE_PATH.
        #       See https://forum.matomo.org/t/bootstrap-php/5926/10 and
        #       https://github.com/matomo-org/matomo/issues/11654#issuecomment-297730843
        installPhase = ''
          runHook preInstall

          # copy everything to share/, used as webroot folder, and then remove what's known to be not needed
          mkdir -p $out/share
          cp -ra * $out/share/
          # tmp/ is created by matomo in PIWIK_USER_PATH
          rmdir $out/share/tmp
          # config/ needs to be accessed by PIWIK_USER_PATH anyway
          ln -s $out/share/config $out/

          makeWrapper ${php}/bin/php $out/bin/matomo-console \
            --add-flags "$out/share/console"

          runHook postInstall
        '';

        filesToFix = [
          "misc/composer/build-xhprof.sh"
          "misc/composer/clean-xhprof.sh"
          "misc/cron/archive.sh"
          "plugins/Installation/FormDatabaseSetup.php"
          "vendor/leafo/lessphp/package.sh"
          "vendor/pear/archive_tar/sync-php4"
          "vendor/szymach/c-pchart/coverage.sh"
          # drupal_test.sh does not exist in 3.12.0-b3; added for 3.13.0
          "vendor/twig/twig/drupal_test.sh"
        ];

        # This fixes the consistency check in the admin interface
        #
        # The filesToFix list may contain files that are exclusive to only one of the versions we build
        # make sure to test for existence to avoid erroring on an incompatible version and failing
        postFixup = ''
          pushd $out/share > /dev/null
          for f in $filesToFix; do
            if [ -f "$f" ]; then
              length="$(wc -c "$f" | cut -d' ' -f1)"
              hash="$(md5sum "$f" | cut -d' ' -f1)"
              sed -i "s:\\(\"$f\"[^(]*(\\).*:\\1\"$length\", \"$hash\"),:g" config/manifest.inc.php
            fi
          done
          popd > /dev/null
        '';

        meta = with stdenv.lib; {
          description = "A real-time web analytics application";
          license = licenses.gpl3Plus;
          homepage = "https://matomo.org/";
          platforms = platforms.all;
          maintainers = with maintainers; [ florianjacob kiwi ];
        };
      };
in
stdenv.lib.mapAttrs common versions