{ lib, pkgs, config,  ... }:
let
  nextcloud = pkgs.webapps.nextcloud.withApps (builtins.attrValues pkgs.webapps.nextcloud-apps);
  env = config.myEnv.tools.nextcloud;
  varDir = "/var/lib/nextcloud";
  webappName = "tools_nextcloud";
  apacheRoot = "/run/current-system/webapps/${webappName}";
  cfg = config.myServices.websites.tools.cloud;
  phpFpm = rec {
    basedir = builtins.concatStringsSep ":" (
      [ nextcloud varDir ]
      ++ builtins.attrValues pkgs.webapps.nextcloud-apps);
    phpConfig = ''
      extension=${pkgs.phpPackages.redis}/lib/php/extensions/redis.so
      extension=${pkgs.phpPackages.apcu}/lib/php/extensions/apcu.so
      zend_extension=${pkgs.php}/lib/php/extensions/opcache.so
      '';
    pool = {
      "listen.owner" = "wwwrun";
      "listen.group" = "wwwrun";
      "pm" = "ondemand";
      "pm.max_children" = "60";
      "pm.process_idle_timeout" = "60";

      "php_admin_value[output_buffering]" = "0";
      "php_admin_value[max_execution_time]" = "1800";
      "php_admin_value[zend_extension]" = "opcache";
      #already enabled by default?
      #"php_value[opcache.enable]" = "1";
      "php_value[opcache.enable_cli]" = "1";
      "php_value[opcache.interned_strings_buffer]" = "8";
      "php_value[opcache.max_accelerated_files]" = "10000";
      "php_value[opcache.memory_consumption]" = "128";
      "php_value[opcache.save_comments]" = "1";
      "php_value[opcache.revalidate_freq]" = "1";
      "php_admin_value[memory_limit]" = "512M";

      "php_admin_value[open_basedir]" = "/run/wrappers/bin/sendmail:${basedir}:/proc/meminfo:/dev/urandom:/proc/self/fd:/tmp";
      "php_admin_value[session.save_path]" = "${varDir}/phpSessions";
    };
  };
in {
  options.myServices.websites.tools.cloud = {
    enable = lib.mkEnableOption "enable cloud website";
  };

  config = lib.mkIf cfg.enable {
    # FIXME: find a way to backup the data
    services.websites.env.tools.modules = [ "proxy_fcgi" ];

    services.websites.env.tools.vhostConfs.cloud = {
      certName    = "eldiron";
      addToCerts  = true;
      hosts       = ["cloud.immae.eu" ];
      root        = apacheRoot;
      extraConfig = [
        ''
          SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=$1
          <Directory ${apacheRoot}>
            AcceptPathInfo On
            DirectoryIndex index.php
            Options FollowSymlinks
            Require all granted
            AllowOverride all

            <IfModule mod_headers.c>
              Header always set Strict-Transport-Security "max-age=15552000; includeSubDomains; preload"
            </IfModule>
            <FilesMatch "\.php$">
              CGIPassAuth on
              SetHandler "proxy:unix:${config.services.phpfpm.pools.nextcloud.socket}|fcgi://localhost"
            </FilesMatch>

          </Directory>
        ''
      ];
    };

    secrets.keys = [{
      dest = "webapps/tools-nextcloud";
      user = "wwwrun";
      group = "wwwrun";
      permissions = "0600";
      text = ''
        <?php
        $CONFIG = array (
          // FIXME: change this value when nextcloud starts getting slow
          'instanceid' => '${env.instance_id}1',
          'datadirectory' => '/var/lib/nextcloud/',
          'passwordsalt' => '${env.password_salt}',
          'debug' => false,
          'dbtype' => 'pgsql',
          'version' => '16.0.0.9',
          'dbname' => '${env.postgresql.database}',
          'dbhost' => '${env.postgresql.socket}',
          'dbtableprefix' => 'oc_',
          'dbuser' => '${env.postgresql.user}',
          'dbpassword' => '${env.postgresql.password}',
          'installed' => true,
          'maxZipInputSize' => 0,
          'allowZipDownload' => true,
          'forcessl' => true,
          'theme' => ${"''"},
          'maintenance' => false,
          'trusted_domains' => 
          array (
            0 => 'cloud.immae.eu',
          ),
          'secret' => '${env.secret}',
          'appstoreenabled' => false,
          'appstore.experimental.enabled' => true,
          'loglevel' => 2,
          'trashbin_retention_obligation' => 'auto',
          'htaccess.RewriteBase' => '/',
          'mail_smtpmode' => 'sendmail',
          'mail_smtphost' => '127.0.0.1',
          'mail_smtpname' => ''',
          'mail_smtppassword' => ''',
          'mail_from_address' => 'nextcloud',
          'mail_smtpauth' => false,
          'mail_domain' => 'tools.immae.eu',
          'memcache.local' => '\\OC\\Memcache\\APCu',
          'memcache.locking' => '\\OC\\Memcache\\Redis',
          'filelocking.enabled' => true,
          'redis' => 
          array (
            'host' => '${env.redis.socket}',
            'port' => 0,
            'dbindex' => ${env.redis.db},
          ),
          'overwrite.cli.url' => 'https://cloud.immae.eu',
          'ldapIgnoreNamingRules' => false,
          'ldapProviderFactory' => '\\OCA\\User_LDAP\\LDAPProviderFactory',
          'has_rebuilt_cache' => true,
        );
      '';
    }];
    users.users.root.packages = let
      occ = pkgs.writeScriptBin "nextcloud-occ" ''
        #! ${pkgs.stdenv.shell}
        cd ${nextcloud}
        NEXTCLOUD_CONFIG_DIR="${nextcloud}/config" \
          exec \
          sudo -u wwwrun ${pkgs.php}/bin/php \
          -c ${pkgs.php}/etc/php.ini \
          occ $*
        '';
    in [ occ ];

    system.activationScripts.nextcloud = {
      deps = [ "secrets" ];
      text = let
        confs = lib.attrsets.mapAttrs (n: v: pkgs.writeText "${n}.json" (builtins.toJSON v)) nextcloud.otherConfig;
      in
        ''
        install -m 0755 -o wwwrun -g wwwrun -d ${varDir}
        install -m 0750 -o wwwrun -g wwwrun -d ${varDir}/phpSessions
        ${builtins.concatStringsSep "\n" (lib.attrsets.mapAttrsToList (n: v:
          "install -D -m 0644 -o wwwrun -g wwwrun -T ${v} ${varDir}/config/${n}.json"
          ) confs)}
        install -D -m 0600 -o wwwrun -g wwwrun -T /var/secrets/webapps/tools-nextcloud ${varDir}/config/config.php
      '';
    };
    # FIXME: add a warning when config.php changes
    system.extraSystemBuilderCmds = ''
      mkdir -p $out/webapps
      ln -s ${nextcloud} $out/webapps/${webappName}
      '';

    services.phpfpm.pools.nextcloud = {
      user = "wwwrun";
      group = "wwwrun";
      settings = phpFpm.pool;
      phpOptions = config.services.phpfpm.phpOptions + phpFpm.phpConfig;
    };

    services.cron = {
      enable = true;
      systemCronJobs = let
        script = pkgs.writeScriptBin "nextcloud-cron" ''
          #! ${pkgs.stdenv.shell}
          export LOCALE_ARCHIVE=/run/current-system/sw/lib/locale/locale-archive
          export PATH=/run/wrappers/bin:$PATH
          ${pkgs.php}/bin/php -d memory_limit=512M -f ${nextcloud}/cron.php
          '';
      in [
        ''
          */15 * * * * wwwrun ${script}/bin/nextcloud-cron
        ''
      ];
    };
  };
}