{ hyprLib, mainMod, ... }:

let
  inherit (hyprLib) 
    bind
    makeSubmap
    muldsp
    pass
    sendShortcut
    submap
  ;

  makePassthrough = window: binds:
    let
      customBinds = map (mapping:
        let
          k = builtins.elemAt mapping 0;
          v = builtins.elemAt mapping 1;
          d = if builtins.length mapping >= 3 then builtins.elemAt mapping 2 else "";
        in
        [k (muldsp [(sendShortcut v window) (submap "reset")]) d]
      ) binds;
    in
      customBinds ++ [["ESCAPE" (submap "reset")]];
  fehBinds = [
    [ "RETURN" "0"]
    [ "1" "1"]
    [ "2" "2"]
    [ "3" "3"]
    [ "4" "4"]
    [ "W" "5"]
    [ "A" "6"]
    [ "D" "7"]
    [ "F" "8"]
    [ "Z" "9"]
    [ "Q" "LEFT"]
    [ "E" "RIGHT"]
    [ "S" "h"]
    [ "H" "h"]
  ];
  feishinBinds = [
    [ "0" "0" "Send '0' to feishin"]
    [ "1" "1" "Send '1' to feishin"]
    [ "2" "2" "Send '2' to feishin"]
    [ "3" "3" "Send '3' to feishin"]
    [ "4" "4" "Send '4' to feishin"]
    [ "W" "5" "Send '5' to feishin"]
    [ "S" "h" "Send 'h' to feishin"]
    [ "H" "h" "Send 'h' to feishin"]
    [ "Q" "q" "Send 'q' to feishin"]
    [ "E" "e" "Send 'e' to feishin"]
    [ "SPACE" "space" "Send 'space' to feishin"]
    [ "A" "a" "Send 'a' to feishin"]
    [ "D" "d" "Send 'd' to feishin"]
  ];
in 
{
  home-manager.users."djai".wayland.windowManager.hyprland.settings = {
    bind = [
      (bind "${mainMod} + SHIFT + A" (submap "feh") "")
      (bind "${mainMod} + SHIFT + F" (submap "feishin") "Enter feishin passthrough mode")
      (bind "F7" (pass "class:^(com.obsproject.Studio)$") "Send F7 to obs studio")
      (bind "F8" (pass "class:^(com.obsproject.Studio)$") "Send F8 to obs studio")
      (bind "F9" (pass "class:^(com.obsproject.Studio)$") "Send F9 to obs studio")
    ];

    define_submap = [
      (makeSubmap "feh" (makePassthrough "class:^*hideme)$"  fehBinds))
      (makeSubmap "feishin" (makePassthrough "class:^(feishin)$" feishinBinds))
    ];
  };
}