{ pkgs, config, lib, config', ... }:
let
  inherit (lib)
    singleton;

  openwrtRepo = pkgs.fetchFromGitHub {
    owner = "openwrt";
    repo = "openwrt";
    rev = "67e8cc07f9bb95984624198ccf02123f348246df";
    sha256 = "sha256-rBQDTUG9fqwSLrj+LZ6L1x55Y3gkfUubY5zwX9XK3+s=";
  };
in
{
  # giturl="https://raw.githubusercontent.com/openwrt/openwrt/75b83e94a395fedeb4d308f42013a72c6fee2df4/package/network/services/hostapd/patches/"
  # for patch in *.patch
  # do
  #   nix-prefetch-url "$giturl$patch" 2>/dev/null | \
  #     sed -e 's~^~{ url = "'"$giturl$patch"'"; sha256 = "~' | sed -e 's~$~"; \}~'
  # done

  services.hashicorp.vault-agent.settings.template = singleton {
    source = pkgs.writeText "hostapd_wpa_psk.vtmpl" ''
      {{ with secret "kv/data/homelab-1/blowhole/hostapd/wpa_psk" -}}
      {{ range $key, $value := .Data.data -}}
      {{ with $data := $value -}}
      {{ $data.mac_address }} {{ $data.psk }}
      {{ end -}}
      {{ end -}}
      {{ end -}}
    '';
    destination = "/run/secrets/hostapd_wpa_psk";
  };

  systemd.services.hostapd.unitConfig = {
    ConditionPathExists = "/run/secrets/hostapd_wpa_psk";
  };

  services.hostapd = {
    interface = "wlp10s0";
    driver = "nl80211";
    ssid = "nothing";
    wpa = false;
    hwMode = "g";
    channel = 14;
    countryCode = "NL";
    enable = true;
    extraConfig = ''
      wpa_psk_file=/run/secrets/hostapd_wpa_psk

      #ieee80211d=1
      #ieee80211h=1
      #ieee80211n=1
      # ieee80211ac=1

      # intel_lar=1
      noscan=0
      beacon_int=100
      channel=14
      # channel=149
      # chanlist=149

      #ht_capab=[HT40+][LDPC][SHORT-GI-20][SHORT-GI-40][TX-STBC][RX-STBC1][MAX-AMSDU-7935][DSSS_CCK-40]
      #ht_capab=[VHT_IBSS][RRM][MU_MIMO_AIR_SNIFFER][SCAN_START_TIME][BSS_PARENT_TSF][FILS_STA][FILS_MAX_CHANNEL_TIME][ACCEPT_BCAST_PROBE_RESP][OCE_PROBE_REQ_HIGH_TX_RATE][CONTROL_PORT_OVER_NL80211][TXQS][ENABLE_FTM_RESPONDER][CONTROL_PORT_NO_PREAUTH][PROTECTED_TWT][DEL_IBSS_STA][BEACON_PROTECTION_CLIENT][SCAN_FREQ_KHZ][CONTROL_PORT_OVER_NL80211_TX_STATUS]

      ap_isolate=1
      preamble=1
      wmm_enabled=1
      utf8_ssid=1

      auth_algs=1
      wpa=2
      wpa_pairwise=CCMP
      wpa_disable_eapol_key_retries=0
      wpa_key_mgmt=WPA-PSK
      okc=0
      disable_pmksa_caching=1

      bssid=e0:d0:45:81:50:00

      # bss=wlp10s1
      # ssid=nothing2
      # bssid=e0:d0:45:81:50:01

      # hw_mode=g
      # channel=9
      # vht_capab=
      # ht_capab=

      # auth_algs=1
      # wpa=2
      # wpa_pairwise=CCMP
      # wpa_disable_eapol_key_retries=0
      # wpa_key_mgmt=WPA-PSK
      # okc=0
      # disable_pmksa_caching=1
      # wpa_passphrase=${config.services.hostapd.wpaPassphrase}
    '';
  };

  nixpkgs.overlays = singleton
    (final: prev:
      {
        hostapd = prev.hostapd.overrideAttrs (old: {
          buildInputs = old.buildInputs ++ (with pkgs; [
            libubox
            ubus
          ]);

          src = pkgs.fetchgit {
            url = "http://w1.fi/hostap.git";
            rev = "bb945b98fefc64887dffb40773a19d77585cee42";
            sha256 = "sha256-bDxMWjvgyNdBUH8pXJ+yMl3vBBoz57LOJEZHAGSDyS0=";
          };

          extraConfig = ''
            # Example hostapd build time configuration
            #
            # This file lists the configuration options that are used when building the
            # hostapd binary. All lines starting with # are ignored. Configuration option
            # lines must be commented out complete, if they are not to be included, i.e.,
            # just setting VARIABLE=n is not disabling that variable.
            #
            # This file is included in Makefile, so variables like CFLAGS and LIBS can also
            # be modified from here. In most cass, these lines should use += in order not
            # to override previous values of the variables.

            # Driver interface for Host AP driver
            #CONFIG_DRIVER_HOSTAP=y

            # Driver interface for wired authenticator
            CONFIG_DRIVER_WIRED=y

            # Driver interface for drivers using the nl80211 kernel interface
            CONFIG_DRIVER_NL80211=y

            # QCA vendor extensions to nl80211
            #CONFIG_DRIVER_NL80211_QCA=y

            # driver_nl80211.c requires libnl. If you are compiling it yourself
            # you may need to point hostapd to your version of libnl.
            #
            #CFLAGS += -I$<path to libnl include files>
            #LIBS += -L$<path to libnl library files>

            # Use libnl v2.0 (or 3.0) libraries.
            #CONFIG_LIBNL20=y

            # Use libnl 3.2 libraries (if this is selected, CONFIG_LIBNL20 is ignored)
            #CONFIG_LIBNL32=y


            # Driver interface for FreeBSD net80211 layer (e.g., Atheros driver)
            #CONFIG_DRIVER_BSD=y
            #CFLAGS += -I/usr/local/include
            #LIBS += -L/usr/local/lib
            #LIBS_p += -L/usr/local/lib
            #LIBS_c += -L/usr/local/lib

            # Driver interface for no driver (e.g., RADIUS server only)
            #CONFIG_DRIVER_NONE=y

            # IEEE 802.11F/IAPP
            CONFIG_IAPP=y

            # WPA2/IEEE 802.11i RSN pre-authentication
            CONFIG_RSN_PREAUTH=y

            # IEEE 802.11w (management frame protection)
            #CONFIG_IEEE80211W=y

            # Support Operating Channel Validation
            #CONFIG_OCV=y

            # Integrated EAP server
            CONFIG_EAP=y

            # EAP Re-authentication Protocol (ERP) in integrated EAP server
            CONFIG_ERP=y

            # EAP-MD5 for the integrated EAP server
            CONFIG_EAP_MD5=y

            # EAP-TLS for the integrated EAP server
            CONFIG_EAP_TLS=y

            # EAP-MSCHAPv2 for the integrated EAP server
            CONFIG_EAP_MSCHAPV2=y

            # EAP-PEAP for the integrated EAP server
            CONFIG_EAP_PEAP=y

            # EAP-GTC for the integrated EAP server
            CONFIG_EAP_GTC=y

            # EAP-TTLS for the integrated EAP server
            CONFIG_EAP_TTLS=y

            # EAP-SIM for the integrated EAP server
            #CONFIG_EAP_SIM=y

            # EAP-AKA for the integrated EAP server
            #CONFIG_EAP_AKA=y

            # EAP-AKA' for the integrated EAP server
            # This requires CONFIG_EAP_AKA to be enabled, too.
            #CONFIG_EAP_AKA_PRIME=y

            # EAP-PAX for the integrated EAP server
            #CONFIG_EAP_PAX=y

            # EAP-PSK for the integrated EAP server (this is _not_ needed for WPA-PSK)
            #CONFIG_EAP_PSK=y

            # EAP-pwd for the integrated EAP server (secure authentication with a password)
            #CONFIG_EAP_PWD=y

            # EAP-SAKE for the integrated EAP server
            #CONFIG_EAP_SAKE=y

            # EAP-GPSK for the integrated EAP server
            #CONFIG_EAP_GPSK=y
            # Include support for optional SHA256 cipher suite in EAP-GPSK
            #CONFIG_EAP_GPSK_SHA256=y

            # EAP-FAST for the integrated EAP server
            CONFIG_EAP_FAST=y

            # EAP-TEAP for the integrated EAP server
            # Note: The current EAP-TEAP implementation is experimental and should not be
            # enabled for production use. The IETF RFC 7170 that defines EAP-TEAP has number
            # of conflicting statements and missing details and the implementation has
            # vendor specific workarounds for those and as such, may not interoperate with
            # any other implementation. This should not be used for anything else than
            # experimentation and interoperability testing until those issues has been
            # resolved.
            #CONFIG_EAP_TEAP=y

            # Wi-Fi Protected Setup (WPS)
            CONFIG_WPS=y
            # Enable UPnP support for external WPS Registrars
            #CONFIG_WPS_UPNP=y
            # Enable WPS support with NFC config method
            #CONFIG_WPS_NFC=y

            # EAP-IKEv2
            #CONFIG_EAP_IKEV2=y

            # Trusted Network Connect (EAP-TNC)
            #CONFIG_EAP_TNC=y

            # EAP-EKE for the integrated EAP server
            #CONFIG_EAP_EKE=y

            # PKCS#12 (PFX) support (used to read private key and certificate file from
            # a file that usually has extension .p12 or .pfx)
            CONFIG_PKCS12=y

            # RADIUS authentication server. This provides access to the integrated EAP
            # server from external hosts using RADIUS.
            #CONFIG_RADIUS_SERVER=y

            # Build IPv6 support for RADIUS operations
            CONFIG_IPV6=y

            # IEEE Std 802.11r-2008 (Fast BSS Transition)
            CONFIG_IEEE80211R=y

            # Use the hostapd's IEEE 802.11 authentication (ACL), but without
            # the IEEE 802.11 Management capability (e.g., FreeBSD/net80211)
            #CONFIG_DRIVER_RADIUS_ACL=y

            # IEEE 802.11n (High Throughput) support
            CONFIG_IEEE80211N=y

            # Wireless Network Management (IEEE Std 802.11v-2011)
            # Note: This is experimental and not complete implementation.
            CONFIG_WNM=y

            # IEEE 802.11ac (Very High Throughput) support
            CONFIG_IEEE80211AC=y

            # IEEE 802.11ax HE support
            # Note: This is experimental and work in progress. The definitions are still
            # subject to change and this should not be expected to interoperate with the
            # final IEEE 802.11ax version.
            CONFIG_IEEE80211AX=y

            # Remove debugging code that is printing out debug messages to stdout.
            # This can be used to reduce the size of the hostapd considerably if debugging
            # code is not needed.
            #CONFIG_NO_STDOUT_DEBUG=y

            # Add support for writing debug log to a file: -f /tmp/hostapd.log
            # Disabled by default.
            #CONFIG_DEBUG_FILE=y

            # Send debug messages to syslog instead of stdout
            CONFIG_DEBUG_SYSLOG=y

            # Add support for sending all debug messages (regardless of debug verbosity)
            # to the Linux kernel tracing facility. This helps debug the entire stack by
            # making it easy to record everything happening from the driver up into the
            # same file, e.g., using trace-cmd.
            #CONFIG_DEBUG_LINUX_TRACING=y

            # Remove support for RADIUS accounting
            #CONFIG_NO_ACCOUNTING=y

            # Remove support for RADIUS
            #CONFIG_NO_RADIUS=y

            # Remove support for VLANs
            #CONFIG_NO_VLAN=y

            # Enable support for fully dynamic VLANs. This enables hostapd to
            # automatically create bridge and VLAN interfaces if necessary.
            CONFIG_FULL_DYNAMIC_VLAN=y

            # Use netlink-based kernel API for VLAN operations instead of ioctl()
            # Note: This requires libnl 3.1 or newer.
            #CONFIG_VLAN_NETLINK=y

            # Remove support for dumping internal state through control interface commands
            # This can be used to reduce binary size at the cost of disabling a debugging
            # option.
            CONFIG_NO_DUMP_STATE=y

            # Enable tracing code for developer debugging
            # This tracks use of memory allocations and other registrations and reports
            # incorrect use with a backtrace of call (or allocation) location.
            #CONFIG_WPA_TRACE=y
            # For BSD, comment out these.
            #LIBS += -lexecinfo
            #LIBS_p += -lexecinfo
            #LIBS_c += -lexecinfo

            # Use libbfd to get more details for developer debugging
            # This enables use of libbfd to get more detailed symbols for the backtraces
            # generated by CONFIG_WPA_TRACE=y.
            #CONFIG_WPA_TRACE_BFD=y
            # For BSD, comment out these.
            #LIBS += -lbfd -liberty -lz
            #LIBS_p += -lbfd -liberty -lz
            #LIBS_c += -lbfd -liberty -lz

            # hostapd depends on strong random number generation being available from the
            # operating system. os_get_random() function is used to fetch random data when
            # needed, e.g., for key generation. On Linux and BSD systems, this works by
            # reading /dev/urandom. It should be noted that the OS entropy pool needs to be
            # properly initialized before hostapd is started. This is important especially
            # on embedded devices that do not have a hardware random number generator and
            # may by default start up with minimal entropy available for random number
            # generation.
            #
            # As a safety net, hostapd is by default trying to internally collect
            # additional entropy for generating random data to mix in with the data
            # fetched from the OS. This by itself is not considered to be very strong, but
            # it may help in cases where the system pool is not initialized properly.
            # However, it is very strongly recommended that the system pool is initialized
            # with enough entropy either by using hardware assisted random number
            # generator or by storing state over device reboots.
            #
            # hostapd can be configured to maintain its own entropy store over restarts to
            # enhance random number generation. This is not perfect, but it is much more
            # secure than using the same sequence of random numbers after every reboot.
            # This can be enabled with -e<entropy file> command line option. The specified
            # file needs to be readable and writable by hostapd.
            #
            # If the os_get_random() is known to provide strong random data (e.g., on
            # Linux/BSD, the board in question is known to have reliable source of random
            # data from /dev/urandom), the internal hostapd random pool can be disabled.
            # This will save some in binary size and CPU use. However, this should only be
            # considered for builds that are known to be used on devices that meet the
            # requirements described above.
            CONFIG_NO_RANDOM_POOL=y

            # Should we attempt to use the getrandom(2) call that provides more reliable
            # yet secure randomness source than /dev/random on Linux 3.17 and newer.
            # Requires glibc 2.25 to build, falls back to /dev/random if unavailable.
            CONFIG_GETRANDOM=y

            # Should we use poll instead of select? Select is used by default.
            #CONFIG_ELOOP_POLL=y

            # Should we use epoll instead of select? Select is used by default.
            CONFIG_ELOOP_EPOLL=y

            # Should we use kqueue instead of select? Select is used by default.
            #CONFIG_ELOOP_KQUEUE=y

            # Select TLS implementation
            # openssl = OpenSSL (default)
            # gnutls = GnuTLS
            # internal = Internal TLSv1 implementation (experimental)
            # linux = Linux kernel AF_ALG and internal TLSv1 implementation (experimental)
            # none = Empty template
            CONFIG_TLS=openssl

            # TLS-based EAP methods require at least TLS v1.0. Newer version of TLS (v1.1)
            # can be enabled to get a stronger construction of messages when block ciphers
            # are used.
            #CONFIG_TLSV11=y

            # TLS-based EAP methods require at least TLS v1.0. Newer version of TLS (v1.2)
            # can be enabled to enable use of stronger crypto algorithms.
            #CONFIG_TLSV12=y

            # Select which ciphers to use by default with OpenSSL if the user does not
            # specify them.
            #CONFIG_TLS_DEFAULT_CIPHERS="DEFAULT:!EXP:!LOW"

            # If CONFIG_TLS=internal is used, additional library and include paths are
            # needed for LibTomMath. Alternatively, an integrated, minimal version of
            # LibTomMath can be used. See beginning of libtommath.c for details on benefits
            # and drawbacks of this option.
            CONFIG_INTERNAL_LIBTOMMATH=y
            #ifndef CONFIG_INTERNAL_LIBTOMMATH
            #LTM_PATH=/usr/src/libtommath-0.39
            #CFLAGS += -I$(LTM_PATH)
            #LIBS += -L$(LTM_PATH)
            #LIBS_p += -L$(LTM_PATH)
            #endif
            # At the cost of about 4 kB of additional binary size, the internal LibTomMath
            # can be configured to include faster routines for exptmod, sqr, and div to
            # speed up DH and RSA calculation considerably
            #CONFIG_INTERNAL_LIBTOMMATH_FAST=y

            # Interworking (IEEE 802.11u)
            # This can be used to enable functionality to improve interworking with
            # external networks.
            CONFIG_INTERWORKING=y

            # Hotspot 2.0
            #CONFIG_HS20=y

            # Enable SQLite database support in hlr_auc_gw, EAP-SIM DB, and eap_user_file
            #CONFIG_SQLITE=y

            # Enable Fast Session Transfer (FST)
            #CONFIG_FST=y

            # Enable CLI commands for FST testing
            #CONFIG_FST_TEST=y

            # Testing options
            # This can be used to enable some testing options (see also the example
            # configuration file) that are really useful only for testing clients that
            # connect to this hostapd. These options allow, for example, to drop a
            # certain percentage of probe requests or auth/(re)assoc frames.
            #
            #CONFIG_TESTING_OPTIONS=y

            # Automatic Channel Selection
            # This will allow hostapd to pick the channel automatically when channel is set
            # to "acs_survey" or "0". Eventually, other ACS algorithms can be added in
            # similar way.
            #
            # Automatic selection is currently only done through initialization, later on
            # we hope to do background checks to keep us moving to more ideal channels as
            # time goes by. ACS is currently only supported through the nl80211 driver and
            # your driver must have survey dump capability that is filled by the driver
            # during scanning.
            #
            # You can customize the ACS survey algorithm with the hostapd.conf variable
            # acs_num_scans.
            #
            # Supported ACS drivers:
            # * ath9k
            # * ath5k
            # * ath10k
            #
            # For more details refer to:
            # http://wireless.kernel.org/en/users/Documentation/acs
            #
            #CONFIG_ACS=y

            # Multiband Operation support
            # These extentions facilitate efficient use of multiple frequency bands
            # available to the AP and the devices that may associate with it.
            #CONFIG_MBO=y

            # Client Taxonomy
            # Has the AP retain the Probe Request and (Re)Association Request frames from
            # a client, from which a signature can be produced which can identify the model
            # of client device like "Nexus 6P" or "iPhone 5s".
            CONFIG_TAXONOMY=y

            # Fast Initial Link Setup (FILS) (IEEE 802.11ai)
            #CONFIG_FILS=y
            # FILS shared key authentication with PFS
            #CONFIG_FILS_SK_PFS=y

            # Include internal line edit mode in hostapd_cli. This can be used to provide
            # limited command line editing and history support.
            #CONFIG_WPA_CLI_EDIT=y

            # Opportunistic Wireless Encryption (OWE)
            # Experimental implementation of draft-harkins-owe-07.txt
            #CONFIG_OWE=y

            # Airtime policy support
            CONFIG_AIRTIME_POLICY=y

            # Proxy ARP support
            CONFIG_PROXYARP=y

            # Override default value for the wpa_disable_eapol_key_retries configuration
            # parameter. See that parameter in hostapd.conf for more details.
            #CFLAGS += -DDEFAULT_WPA_DISABLE_EAPOL_KEY_RETRIES=1

            # uBus IPC/RPC System
            # Services can connect to the bus and provide methods
            # that can be called by other services or clients.
            CONFIG_UBUS=y

            # OpenWrt patch 380-disable-ctrl-iface-mib.patch
            # leads to the MIB only being compiled in if
            # CONFIG_CTRL_IFACE_MIB is enabled.
            CONFIG_CTRL_IFACE_MIB=y
          '';

          patches = singleton config'.flake.patches.hostapd.intel_lar-and-noscan;

          prePatch = ''
            patchFolder="${openwrtRepo}/package/network/services/hostapd/patches"
            for file in $(ls $patchFolder) ; do
              if [ $file != "300-noscan.patch" ] ; then
                patches+=" $patchFolder/$file"
              fi
            done
          '';

          postPatch = ''
            cp -RT ${openwrtRepo}/package/network/services/hostapd/src .
          '';
        });
      }
    );
}