{ config, pkgs, lib, hostName, ... }:
let
  wifiIface = "wlp5s0";
  wwanIface = "wwp0s19u1u3i3"; # usb_modeswitch -W -v 12d1 -p 1573 -u 1
  ftthIface = "enp1s0";
  eth1Iface = "enp2s0";
  eth2Iface = "enp3s0";
  eth3Iface = "enp4s0";
  wifiIPv4 = "192.168.5";
  eth1IPv4 = "192.168.2";
  eth2IPv4 = "192.168.3";
  eth3IPv4 = "192.168.4";
in
{
imports = [
  networking/nftables.nix
  ../../nixos/profiles/networking.nix
  ../../nixos/profiles/dnscrypt-proxy2.nix
  ../../nixos/profiles/wireguard/wg-intra.nix
];
install.substituteOnDestination = false;
networking.domain = "sourcephile.fr";
networking.useDHCP = false;

boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
networking.nftables.ruleset = lib.mkAfter ''
  table inet filter {
    chain input {
      iifname { ${wwanIface}, ${ftthIface} } jump input-net
      iifname { ${wwanIface}, ${ftthIface} } log level warn prefix "input-net: " counter drop

      iifname { ${wifiIface}, ${eth1Iface}, ${eth2Iface}, ${eth3Iface} } jump input-lan
      iifname { ${wifiIface}, ${eth1Iface}, ${eth2Iface}, ${eth3Iface} } log level warn prefix "input-lan: " counter drop
    }
    chain output {
      oifname { ${wwanIface}, ${ftthIface} } jump output-net
      oifname { ${wwanIface}, ${ftthIface} } log level warn prefix "output-net: " counter drop

      oifname { ${wifiIface}, ${eth1Iface}, ${eth2Iface}, ${eth3Iface} } jump output-lan
      oifname { ${wifiIface}, ${eth1Iface}, ${eth2Iface}, ${eth3Iface} } log level warn prefix "output-lan: " counter drop
    }
    chain forward-to-net {
      #jump forward-connectivity
      counter accept
    }
    chain forward-from-net {
      ct state { established, related } accept
      log level warn prefix "forward-from-net: " counter drop
    }
    chain forward {
      iifname { ${wifiIface}, ${eth1Iface}, ${eth2Iface}, ${eth3Iface} } oifname { ${wwanIface}, ${ftthIface} } goto forward-to-net
      iifname { ${wwanIface}, ${ftthIface} } oifname { ${wifiIface}, ${eth1Iface}, ${eth2Iface}, ${eth3Iface} } goto forward-from-net
      log level warn prefix "forward: " counter drop
    }
  }
  table inet nat {
    chain postrouting {
      iifname { ${wifiIface}, ${eth1Iface}, ${eth2Iface}, ${eth3Iface} } oifname { ${wwanIface}, ${ftthIface} } masquerade
    }
  }
'';

services.avahi.openFirewall = true;
services.dnscrypt-proxy2.settings.listen_addresses = [
  "127.0.0.1:53"
  "[::1]:53"
  "${wifiIPv4}.1:53"
  "${eth1IPv4}.1:53"
  "${eth2IPv4}.1:53"
  "${eth3IPv4}.1:53"
];
networking.interfaces = {
  ${ftthIface} = {
    useDHCP = false;
  };
  ${wifiIface} = {
    useDHCP = false;
    ipv4.addresses = [ { address = "${wifiIPv4}.1"; prefixLength = 24; } ];
  };
  ${eth1Iface} = {
    useDHCP = false;
    ipv4.addresses = [ { address = "${eth1IPv4}.1"; prefixLength = 24; } ];
  };
  ${eth2Iface} = {
    useDHCP = false;
    ipv4.addresses = [ { address = "${eth2IPv4}.1"; prefixLength = 24; } ];
  };
  ${eth3Iface} = {
    useDHCP = false;
    ipv4.addresses = [ { address = "${eth3IPv4}.1"; prefixLength = 24; } ];
  };
};


systemd.services.dhcpd4 = {
  onFailure = [
    "network-addresses-${wifiIface}.service"
    "network-addresses-${eth1Iface}.service"
    "network-addresses-${eth2Iface}.service"
    "network-addresses-${eth3Iface}.service"
  ];
};
services.dhcpd4 = {
  enable = true;
  interfaces = [
    wifiIface
    eth1Iface
    eth2Iface
    eth3Iface
  ];
  extraConfig = ''
    option subnet-mask 255.255.255.0;

    option broadcast-address ${wifiIPv4}.255;
    option routers ${wifiIPv4}.1;
    option domain-name-servers ${wifiIPv4}.1;
    subnet ${wifiIPv4}.0 netmask 255.255.255.0 {
      range ${wifiIPv4}.100 ${wifiIPv4}.200;
    }

    option broadcast-address ${eth1IPv4}.255;
    option routers ${eth1IPv4}.1;
    option domain-name-servers ${eth1IPv4}.1;
    subnet ${eth1IPv4}.0 netmask 255.255.255.0 {
      range ${eth1IPv4}.100 ${eth1IPv4}.200;
    }

    option broadcast-address ${eth2IPv4}.255;
    option routers ${eth2IPv4}.1;
    option domain-name-servers ${eth2IPv4}.1;
    subnet ${eth2IPv4}.0 netmask 255.255.255.0 {
      range ${eth2IPv4}.100 ${eth2IPv4}.200;
    }

    option broadcast-address ${eth3IPv4}.255;
    option routers ${eth3IPv4}.1;
    option domain-name-servers ${eth3IPv4}.1;
    subnet ${eth3IPv4}.0 netmask 255.255.255.0 {
      range ${eth3IPv4}.100 ${eth3IPv4}.200;
    }
  '';
};

systemd.services.NetworkManager.wants = [ "ModemManager.service" ];
networking.networkmanager = {
  #enable = true;
  unmanaged = [
    ftthIface
    wifiIface
    eth1Iface
    eth2Iface
    eth3Iface
  ];
};
environment.etc."NetworkManager/system-connections/Prixtel.nmconnection" = {
  mode = "600";
  text = ''
    [connection]
    id=Prixtel
    uuid=b223f550-dff1-4ba3-9755-cd4557faaa5a
    type=gsm
    autoconnect=true
    permissions=user:julm:;

    [gsm]
    apn=sl2sfr
    number=*99#
    #home-only=true

    [ppp]

    [ipv4]
    method=auto

    [ipv6]
    addr-gen-mode=stable-privacy
    method=auto

    [proxy]
  '';
};

networking.wireguard.wg-intra.peers = {
  mermet.enable = true;
  losurdo.enable = true;
  oignon.enable = true;
  patate.enable = true;
};

services.openssh.listenAddresses = [
  { addr = "${wifiIPv4}.1"; port = 22; }
  { addr = "${eth1IPv4}.1"; port = 22; }
  { addr = "${eth2IPv4}.1"; port = 22; }
  { addr = "${eth3IPv4}.1"; port = 22; }
];

environment.systemPackages = [
  pkgs.iw
  pkgs.modem-manager-gui
];

# iw dev wlp4s0 station dump
# DOC: https://w1.fi/cgit/hostap/plain/hostapd/hostapd.conf
services.hostapd = {
  enable = true;
  logLevel = 2;
  interface = wifiIface;
  # 0 means the AP will search for the channel with the least interferences (ACS)
  channel = 1;
  hwMode = "g";
  ssid = hostName;
  wpa = false;
  #wpaPassphrase = "bidonpoissonmaisonronron";
  countryCode = "FR";
  extraConfig = ''
    # WLAN
    beacon_int=100
    dtim_period=2 # DTIM (delivery trafic information message)
    preamble=1
    # limit the frequencies used to those allowed in the country
    ieee80211d=1

    # WPA2
    #wpa_key_mgmt=WPA-PSK
    #wpa_pairwise=CCMP
    #rsn_pairwise=CCMP
    #auth_algs=1 # 0=noauth, 1=wpa, 2=wep, 3=both
    macaddr_acl=0
    # QoS support, also required for full speed on 802.11n/ac/ax
    wmm_enabled=1
    eap_reauth_period=360000
    wpa_group_rekey=600
    wpa_ptk_rekey=600
    wpa_gmk_rekey=86400

    # N-WLAN
    ieee80211n=1
    # See Capabilities in iw list
    #ht_capab=[HT40+][SHORT-GI-40][DSSS_CCK-40][MAX-AMSDU-3839]
    require_ht=1
    obss_interval=0

    # 802.11ac support
    ieee80211ac=0
  '';
};
}