{ lib, pkgs, config, inputs, ... }:

# Hyprland config migrated from github.com/darman96/hyprland-dotfiles (the
# hyprlang `hypr/*.conf` files) into the home-manager lua-style `settings`
# (configType defaults to "lua" on stateVersion 26.05). Each top-level
# `settings` attr becomes an `hl.<name>(...)` call in ~/.config/hypr/hyprland.lua;
# `_args` lists become multi-arg calls, `_var` locals become `local x = ...`, and
# `lib.generators.mkLuaInline` values render as raw Lua expressions.
#
# Imported by home.nix. System-level Hyprland enable (session entry, portals)
# lives in ../../services/desktop/desktop-hyprland.nix; this manages the user's
# own hyprland.lua.
#
# Deliberately NOT migrated:
#   - hyprbars.conf: config for the third-party `hyprbevelbars` plugin, which
#     isn't packaged in nixpkgs. Load it via
#     `wayland.windowManager.hyprland.plugins` and re-add its config once
#     available. (hyprredsquare.conf's plugin was renamed hypr-chrome and
#     rewritten since - it's wired in below via the `hypr-chrome` flake
#     input instead, with its own `plugin.hyprchrome` config.)
#   - hyprqt6engine.conf + `QT_QPA_PLATFORMTHEME=hyprqt6engine`: terra themes Qt
#     through qtct/Dracula in home.nix, so that env var is left off to avoid a conflict.
#   - hyprlock.conf: a separate program (use `programs.hyprlock` if wanted).
#   - the duplicate pamixer/amixer + `.wob` volume binds: kept only the clean
#     pipewire `wpctl`/`playerctl` set (no wob overlay is configured here).
#   - `XDG_MENU_PREFIX=arch-` and `VCPKG_ROOT`: Arch-/user-specific.
# Many binds reference apps/scripts not packaged on terra yet (vivaldi-stable,
# dolphin, vicinae, grimblast, waypaper, discord, gitkraken, qbz,
# ~/.config/scripts/start-communications.sh); add them separately.

let
  lua = lib.generators.mkLuaInline;

  # Wallpaper images aren't checked into this repo (binary blobs) — pulled
  # from the existing Wallhaven library on /mnt/hdd_01 instead. Picked once
  # here rather than at runtime, since hyprpaper has no built-in "random"
  # mode; re-pick and rebuild (or swap in real per-monitor selection) when
  # this stops being a placeholder.
  wallpaper = "/mnt/hdd_01/data/Pictures/Wallhaven/wallhaven-4yjyd4.png";

  # Dispatchers → the new hl.dsp.* API (signatures verified against hyprland
  # 0.55's src/config/lua/bindings/LuaBindingsDispatchers.cpp).
  dsp = {
    exec              = cmd: lua ''hl.dsp.exec_cmd("${cmd}")'';
    global            = name: lua ''hl.dsp.global("${name}")'';
    exit              = lua "hl.dsp.exit()";
    killactive        = lua "hl.dsp.window.close()";
    togglefloating    = lua ''hl.dsp.window.float({ action = "toggle" })'';
    fullscreen        = lua "hl.dsp.window.fullscreen()";                    # mode 0
    maximize          = lua ''hl.dsp.window.fullscreen({ mode = "maximized" })''; # mode 1
    togglegroup       = lua "hl.dsp.group.toggle()";
    changegroupactive = lua "hl.dsp.group.next()";
    drag              = lua "hl.dsp.window.drag()";
    resizemouse       = lua "hl.dsp.window.resize()";
    movefocus         = dir: lua ''hl.dsp.focus({ direction = "${dir}" })'';
    movewindow        = dir: lua ''hl.dsp.window.move({ direction = "${dir}" })'';
    resizeactive      = x: y:
      lua ''hl.dsp.window.resize({ x = ${toString x}, y = ${toString y}, relative = true })'';
    workspace         = n: lua ''hl.dsp.focus({ workspace = ${toString n} })'';
    workspaceRef      = s: lua ''hl.dsp.focus({ workspace = "${s}" })'';
    movetoworkspace   = n: lua ''hl.dsp.window.move({ workspace = ${toString n} })'';
    togglespecial     = name: lua ''hl.dsp.workspace.toggle_special("${name}")'';
  };

  bind  = keys: dispatcher: { _args = [ keys dispatcher ]; };
  bindo = keys: dispatcher: opts: { _args = [ keys dispatcher opts ]; };

  # SUPER + 1..9 → workspaces 1..9, SUPER + 0 → workspace 10.
  wsKeys = [
    { k = "1"; n = 1; } { k = "2"; n = 2; } { k = "3"; n = 3; }
    { k = "4"; n = 4; } { k = "5"; n = 5; } { k = "6"; n = 6; }
    { k = "7"; n = 7; } { k = "8"; n = 8; } { k = "9"; n = 9; }
    { k = "0"; n = 10; }
  ];
in
{
  services.hyprpaper = {
    enable = true;
    settings = {
      ipc = "on";
      splash = false;
      preload = [ wallpaper ];
      wallpaper = [
        { monitor = "DP-2";     path = wallpaper; }
        { monitor = "HDMI-A-1"; path = wallpaper; }
      ];
    };
  };

  wayland.windowManager.hyprland = {
    enable = true;
    plugins = [ inputs.hypr-chrome.packages.${pkgs.stdenv.hostPlatform.system}.default ];
    settings = {
      # ---- colours (from colors.conf) ----
      fg_color  = { _var = "rgba(eeeeeeff)"; };
      fg_accent = { _var = "rgba(ffd063ff)"; };
      fg_accent_alt = { _var = "rgba(ff9d42ff)"; };
      bg_color  = { _var = "rgba(0f1012ff)"; };
      bg_accent = { _var = "rgba(963c38ff)"; };

      # ---- monitors ----
      monitor = [
        { output = "DP-2";     mode = "2560x1440@144"; position = "1920x0"; scale = 1; }
        { output = "HDMI-A-1"; mode = "1920x1080@60";  position = "0x360";  scale = 1; }
      ];

      # ---- variables (general/decoration/input/misc/...) ----
      config = {
        input = {
          kb_layout = "de";
          numlock_by_default = true;
          follow_mouse = 1;
          sensitivity = 0;
        };

        debug.disable_logs = false;

        general = {
          border_size = 0;
          col = {
            inactive_border = lua "bg_accent";
            active_border = {
              colors = [ (lua "fg_accent") (lua "fg_accent_alt") ];
              angle = 45;
            };
          };
          layout = "dwindle";
          gaps_in = 4;
          gaps_out = 8;
        };

        decoration = {
          dim_special = 0.3;
          rounding = 10;
          blur = {
            enabled = true;
            special = true;        # blur behind the special workspace
            size = 6;
            passes = 2;
            ignore_opacity = true;
          };
          shadow.enabled = false;
          active_opacity = 0.9;
          inactive_opacity = 0.9;
        };

        animations.enabled = true;

        misc = {
          close_special_on_empty = true;
          disable_hyprland_logo = true;
          disable_splash_rendering = true;
        };

        binds = {
          hide_special_on_workspace_change = true;
          workspace_back_and_forth = true;
          allow_workspace_cycles = true;
        };

        plugin.hyprchrome = {
          enabled = true;
          glow_size = 12;
          glow_strength = 0.85;
          shadow_size = 24;
          shadow_color = lua "bg_color";
          shadow_offset = lua "{ 4, 8 }";
          outline_size = lua "2";
          outline_color = lua "fg_color";
        };
      };

      # ---- animations ----
      # specialWorkspace, enabled, speed 8, default curve, slidefadevert -50%
      animation = [
        { leaf = "specialWorkspace"; enabled = true; speed = 8; bezier = "default"; style = "slidefadevert -50%"; }
      ];

      # ---- environment (environment.conf) ----
      env = [
        { _args = [ "HYPRCURSOR_THEME" "Bibata-Modern-Classic" ]; }
        { _args = [ "HYPRCURSOR_SIZE" "24" ]; }
        { _args = [ "XCURSOR_THEME" "Bibata-Modern-Classic" ]; }
        { _args = [ "XCURSOR_SIZE" "24" ]; }
        { _args = [ "GDK_BACKEND" "wayland,x11" ]; }
        { _args = [ "SDL_VIDEODRIVER" "wayland" ]; }
        { _args = [ "CLUTTER_BACKEND" "wayland" ]; }
        { _args = [ "XDG_CURRENT_DESKTOP" "Hyprland" ]; }
        { _args = [ "XDG_SESSION_DESKTOP" "Hyprland" ]; }
        { _args = [ "XDG_SESSION_TYPE" "wayland" ]; }
        { _args = [ "QT_QPA_PLATFORMTHEME" "qt6ct" ]; }
      ];

      # ---- keybinds (keybinds.conf) ----
      bind = [
        (bindo "SUPER + SUPER_L" (dsp.exec "bash $HOME/.config/quickshell/open_launcher.sh") { release = true; })
        (bind "SUPER + Return" (dsp.exec "alacritty"))

        # quickshell app-launcher variants (evaluating — pick one)
      ]
      ++ (map (n: bind "SUPER + CTRL + ${toString n}" (dsp.global "quickshell:launcher${toString n}")) (lib.range 1 7))
      ++ [
        # restart quickshell (also starts it if not running)
        (bind "SUPER + CTRL + 0" (dsp.exec "qs kill; sleep 0.3; qs"))
        # toggle the Slant sidebar
        (bind "SUPER + CTRL + S" (dsp.global "quickshell:sidebar"))
        # toggle the host vitals HUD
        (bind "SUPER + CTRL + V" (dsp.global "quickshell:vitals"))

        (bind "SUPER + B" (dsp.exec "vivaldi"))
        (bind "SUPER + E" (dsp.exec "cosmic-files"))
        (bind "SUPER + SHIFT + G" (dsp.workspaceRef "game"))
        (bind "SUPER + S" (dsp.exec "grim -o DP-2 ~/screenshot.png"))
        (bind "SUPER + SHIFT + S" (dsp.exec "grimblast copy area --freeze"))
        (bind "Print" (dsp.exec "rishot"))
        (bind "SUPER + L" (dsp.exec "hyprlock"))
        (bind "SUPER + W" (dsp.exec "waypaper --random"))

        # window management
        (bind "SUPER + Q" dsp.killactive)
        (bind "SUPER + SHIFT + Q" dsp.exit)
        (bind "SUPER + F" dsp.maximize)
        (bind "SUPER + SHIFT + F" dsp.fullscreen)
        (bind "SUPER + Space" dsp.togglefloating)

        # focus
        (bind "SUPER + left"  (dsp.movefocus "left"))
        (bind "SUPER + right" (dsp.movefocus "right"))
        (bind "SUPER + up"    (dsp.movefocus "up"))
        (bind "SUPER + down"  (dsp.movefocus "down"))

        # move
        (bind "SUPER + SHIFT + left"  (dsp.movewindow "left"))
        (bind "SUPER + SHIFT + right" (dsp.movewindow "right"))
        (bind "SUPER + SHIFT + up"    (dsp.movewindow "up"))
        (bind "SUPER + SHIFT + down"  (dsp.movewindow "down"))

        # resize
        (bind "SUPER + CTRL + left"  (dsp.resizeactive (-20) 0))
        (bind "SUPER + CTRL + right" (dsp.resizeactive 20 0))
        (bind "SUPER + CTRL + up"    (dsp.resizeactive 0 (-20)))
        (bind "SUPER + CTRL + down"  (dsp.resizeactive 0 20))

        # tabbed / group
        (bind "SUPER + g" dsp.togglegroup)
        (bind "SUPER + tab" dsp.changegroupactive)

        # special workspaces
        (bind "SUPER + T" (dsp.togglespecial "terminal"))
        (bind "SUPER + C" (dsp.togglespecial "communications"))
        (bind "SUPER + M" (dsp.togglespecial "music"))
        (bind "SUPER + V" (dsp.togglespecial "version_control"))

        # cycle workspaces
        (bind "SUPER + ALT + up"   (dsp.workspaceRef "e+1"))
        (bind "SUPER + ALT + down" (dsp.workspaceRef "e-1"))

        # mouse move / resize
        (bindo "SUPER + mouse:272" dsp.drag { mouse = true; })
        (bindo "SUPER + mouse:273" dsp.resizemouse { mouse = true; })

        # multimedia (pipewire)
        (bindo "XF86AudioRaiseVolume" (dsp.exec "wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%+") { repeating = true; })
        (bindo "XF86AudioLowerVolume" (dsp.exec "wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%-") { repeating = true; })
        (bind "XF86AudioMute" (dsp.exec "wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle"))
        (bind "XF86AudioPlay" (dsp.exec "playerctl play-pause"))
        (bind "XF86AudioPause" (dsp.exec "playerctl play-pause"))
        (bind "XF86AudioNext" (dsp.exec "playerctl next"))
        (bind "XF86AudioPrev" (dsp.exec "playerctl previous"))
      ]
      ++ (map (w: bind "SUPER + ${w.k}" (dsp.workspace w.n)) wsKeys)
      ++ (map (w: bind "SUPER + SHIFT + ${w.k}" (dsp.movetoworkspace w.n)) wsKeys);

      # ---- window rules (windowrules.conf) ----
      window_rule = [
        { name = "games"; match.class = "gamescope"; workspace = "name:game"; opacity = "1 1 override"; }
        { name = "vivaldi"; match.title = "(.*)(- YouTube - Vivaldi)"; opacity = "1 1 override"; }
        { name = "jetbrains"; match.class = "(jetbrains-)(.*)"; no_initial_focus = true; float = true; center = true; }
        { name = "jetbrains-toolbox"; match.class = "jetbrains-toolbox"; move = "1933 21"; }
        { name = "comms"; match.class = "discord|org.telegram.desktop"; workspace = "special:communications"; }
        { name = "music"; match.class = "qbz"; workspace = "special:music"; }
        { name = "vicinae"; match.class = "vicinae"; stay_focused = true; }
        { name = "gitkraken"; match.class = "gitkraken"; workspace = "special:version_control"; }
      ];

      # ---- workspace rules (workspacerules.conf) ----
      workspace_rule = [
        { workspace = "name:game"; monitor = "DP-2"; decorate = false; }
        { workspace = "special:terminal"; on_created_empty = "alacritty"; gaps_out = 256; }
        { workspace = "special:communications"; on_created_empty = "${config.home.homeDirectory}/.config/scripts/start-communications.sh"; gaps_out = 128; }
        { workspace = "special:music"; on_created_empty = "com.blitzfc.qbz"; gaps_out = 128; }
        { workspace = "special:version_control"; on_created_empty = "com.axosoft.GitKraken"; gaps_out = 128; }
      ];

      # ---- autostart (autostart.conf) ----
      on = {
        _args = [
          "hyprland.start"
          (lua ''
            function()
              hl.exec_cmd("systemctl --user start hyprpolkitagent")
              hl.exec_cmd("cosmic-settings-daemon")
              hl.exec_cmd("quickshell")
              hl.exec_cmd("alacritty", { workspace = "special:terminal silent" })
              hl.exec_cmd("kbuildsycoca6 --noincremental")
            end'')
        ];
      };
    };
  };

  xdg.portal.extraPortals = [ pkgs.xdg-desktop-portal-cosmic ];
}