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

let
  cfg = config.home-manager.users.mainUser.xsession.windowManager.i3;
  colorTheme =
    let
      theme = (import ../../../library/colorThemes.nix).solarized.light.hex;
    in
    theme // {
      foreground = theme.base3;
      background = theme.base03;
    };

  # switch to named workspaces
  # todo : add version assert
  i3-wk-switch = pkgs.i3-wk-switch.overrideAttrs (old: {
    src = pkgs.fetchFromGitHub {
      owner = "tmfink";
      repo = "i3-wk-switch";
      rev = "5f43bb8cbe7938eff476fc534b61c8fb6a700c8f";
      sha256 = "sha256-DOBPI/wO+S8a6EzWJeVGODXeSixFl7SHTtHAq5DG8GU=";
    };
  });

  backgroundCommand = pkgs.writers.writeDash "background" ''
    ${pkgs.xorg.xrandr}/bin/xrandr | grep " connected" | \
      ${pkgs.gnused}/bin/sed -E "s/primary //" | \
      ${pkgs.coreutils-full}/bin/cut -d' ' -f 3 | \
      ${pkgs.gnused}/bin/sed -E 's/\+.*$//g' | \
      ${pkgs.coreutils-full}/bin/sort -r | \
      ${pkgs.coreutils-full}/bin/head -n 1 | \
      ${pkgs.gawk}/bin/awk -F 'x' '{print "--width="$1" --height="$2}' | \
      ${pkgs.findutils}/bin/xargs \
          ${pkgs.polygon-art.polygon-art}/bin/rings \
        /dev/shm/background.png && \
        ${pkgs.feh}/bin/feh --bg-scale /dev/shm/background.png
  '';

in
{
  config = lib.mkIf config.components.gui.enable {
    home-manager.users.mainUser = {


      programs.i3status-rust = {
        enable = true;
        bars = {
          my = {
            icons = "awesome5";
            theme = "solarized-light";
            # https://github.com/greshake/i3status-rust/blob/v0.22.0/doc/blocks.md
            blocks = [
              {
                block = "cpu";
                interval = 1;
              }
              {
                block = "memory";
                display_type = "memory";
                format_mem = "{mem_used_percents}";
                format_swap = "{swap_used_percents}";
              }
              {
                block = "load";
                interval = 1;
                format = "{1m}";
              }
              {
                block = "battery";
                interval = 10;
                format = "{percentage} {time}";
              }
              { block = "uptime"; }
              {
                block = "time";
                interval = 60;
                format = "%Y-%m-%d %R";
              }
            ];
          };
        };

      };

      programs.kitty = {
        enable = true;
        # kitty +kitten themes
        theme = "Gruvbox Light Hard";
        settings = {
          font_family = "JetBrains Mono";
          bold_font = "auto";
          italic_font = "auto";
          bold_italic_font = "auto";
          font_size = 11;
        };
      };

      programs.alacritty = {
        enable = true;
        settings = {
          import =
            let
              themes = pkgs.fetchFromGitHub {
                owner = "alacritty";
                repo = "alacritty-theme";
                rev = "024c5c0dfb65197d5796e29e307b321af9a5e198";
                sha256 = "sha256-zXyGXZSmmTup5o7Dx6he+57vSFpygR+GSD+3PTxDbVk=";
              };
            in
            [ "${themes}/themes/gruvbox_light.yaml" ];
          font = {
            normal = {
              family = "JetBrains Mono";
              style = "Regular";
            };
            bold = {
              family = "JetBrains Mono";
              style = "Bold";
            };
            italic = {
              family = "JetBrains Mono";
              style = "Italic";
            };
            size = 6.0;
          };
        };
      };


      xsession.windowManager.i3 = {
        enable = true;
        extraConfig = ''
          default_border pixel
        '';
        config = {
          modifier = "Mod4";
          terminal = "alacritty";
          startup =
            let
              height = config.configuration.desktop.height;
              width = config.configuration.desktop.width;
            in
            [
              { command = "${pkgs.albert}/bin/albert"; always = true; }
              { command = toString backgroundCommand; always = true; }
              #{ command = "${pkgs.flameshot}/bin/flameshot"; always = true; }
              # { command = "systemctl --user restart polybar"; always = true; notification = false; }
            ];
          fonts = {
            names = [ "JetBrains Mono" ];
            size = 11.0;
          };
          bars =
            with colorTheme;
            let
              selected = blue;
            in
            [{
              #mode = "hide";
              hiddenState = "hide";
              position = "top";
              workspaceButtons = true;
              workspaceNumbers = true;
              statusCommand = "${pkgs.i3status-rust}/bin/i3status-rs ${config.users.users.mainUser.home}/.config/i3status-rust/config-my.toml";
              fonts = {
                names = [ "JetBrains Mono" ];
                size = 11.0;
              };
              trayOutput = "primary";
              colors = {
                background = background;
                statusline = background;
                separator = background;
                focusedWorkspace = {
                  border = selected;
                  background = base02;
                  text = foreground;
                };
                activeWorkspace = {
                  border = background;
                  background = base02;
                  text = foreground;
                };
                inactiveWorkspace = {
                  border = background;
                  background = base02;
                  text = foreground;
                };
                urgentWorkspace = {
                  border = red;
                  background = base02;
                  text = foreground;
                };
                bindingMode = {
                  border = red;
                  background = red;
                  text = background;
                };
              };
            }];
          colors = with colorTheme; {
            background = background;
            focused = {
              background = blue;
              border = blue;
              childBorder = blue;
              indicator = blue;
              text = foreground;
            };
            focusedInactive = {
              background = base01;
              border = base01;
              childBorder = base02;
              indicator = base02;
              text = foreground;
            };
            unfocused = {
              background = base02;
              border = base02;
              childBorder = base02;
              indicator = base02;
              text = foreground;
            };
            urgent = {
              background = orange;
              border = orange;
              childBorder = background;
              indicator = background;
              text = foreground;
            };
          };
          keybindings = {
            "Print" = "exec ${pkgs.flameshot}/bin/flameshot gui -c -p /share/";
            "${cfg.config.modifier}+Return" = "exec ${cfg.config.terminal}";
            "${cfg.config.modifier}+Shift+q" = "exit";
            "${cfg.config.modifier}+q" = "kill";

            "${cfg.config.modifier}+Left" = "focus left";
            "${cfg.config.modifier}+Down" = "focus down";
            "${cfg.config.modifier}+Up" = "focus up";
            "${cfg.config.modifier}+Right" = "focus right";
            "${cfg.config.modifier}+j" = "focus next";
            "${cfg.config.modifier}+k" = "focus prev";

            "${cfg.config.modifier}+Shift+Left" = "move left";
            "${cfg.config.modifier}+Shift+Down" = "move down";
            "${cfg.config.modifier}+Shift+Up" = "move up";
            "${cfg.config.modifier}+Shift+Right" = "move right";

            "${cfg.config.modifier}+h" = "split h";
            "${cfg.config.modifier}+v" = "split v";
            "${cfg.config.modifier}+f" = "fullscreen toggle";

            "${cfg.config.modifier}+s" = "layout stacking";
            "${cfg.config.modifier}+w" = "layout tabbed";
            "${cfg.config.modifier}+e" = "layout toggle split";

            "${cfg.config.modifier}+t" = "floating toggle";
            #"${cfg.config.modifier}+space" = "focus mode_toggle";

            "${cfg.config.modifier}+b" = "exec ${backgroundCommand}";

            "${cfg.config.modifier}+p" = "focus parent";

            "${cfg.config.modifier}+Shift+minus" = "move scratchpad";
            "${cfg.config.modifier}+minus" = "scratchpad show";

            "${cfg.config.modifier}+1" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 1";
            "${cfg.config.modifier}+2" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 2";
            "${cfg.config.modifier}+3" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 3";
            "${cfg.config.modifier}+4" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 4";
            "${cfg.config.modifier}+5" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 5";
            "${cfg.config.modifier}+6" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 6";
            "${cfg.config.modifier}+7" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 7";
            "${cfg.config.modifier}+8" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 8";
            "${cfg.config.modifier}+9" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 9";
            "${cfg.config.modifier}+0" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 10";

            "${cfg.config.modifier}+Shift+1" = "move container to workspace number 1";
            "${cfg.config.modifier}+Shift+2" = "move container to workspace number 2";
            "${cfg.config.modifier}+Shift+3" = "move container to workspace number 3";
            "${cfg.config.modifier}+Shift+4" = "move container to workspace number 4";
            "${cfg.config.modifier}+Shift+5" = "move container to workspace number 5";
            "${cfg.config.modifier}+Shift+6" = "move container to workspace number 6";
            "${cfg.config.modifier}+Shift+7" = "move container to workspace number 7";
            "${cfg.config.modifier}+Shift+8" = "move container to workspace number 8";
            "${cfg.config.modifier}+Shift+9" = "move container to workspace number 9";
            "${cfg.config.modifier}+Shift+0" = "move container to workspace number 10";

            "${cfg.config.modifier}+Escape" = "workspace back_and_forth";

            # rename workspace
            "${cfg.config.modifier}+n" = ''
              exec i3-input -F 'rename workspace to "%s"' -P 'New name for this workspace: '
            '';

            "${cfg.config.modifier}+grave" =
              let
                script = pkgs.writers.writeBash "select-workspace" ''
                  set -e
                  set -o pipefail
                  ${pkgs.i3}/bin/i3-msg -t get_workspaces | \
                  ${pkgs.jq}/bin/jq --raw-output '.[] | .name' | \
                  ${pkgs.rofi}/bin/rofi -dmenu -p 'Select Workspace' | \
                  while read line
                  do
                    ${i3-wk-switch}/bin/i3-wk-switch "$line"
                  done
                '';
              in
              "exec ${script}";

            "${cfg.config.modifier}+Shift+c" = "reload";
            "${cfg.config.modifier}+Shift+r" = "restart";
            "${cfg.config.modifier}+Shift+e" = "exec i3-nagbar -t warning -m 'Do you want to exit i3?' -b 'Yes' 'i3-msg exit'";

            "${cfg.config.modifier}+r" = "mode resize";

            # multiple monitors
            # autorandr --save docked   # to save setup
            # autorandr --save undocked # to save setup
            # autorandr --change        # automatically detects the setup
            "${cfg.config.modifier}+BackSpace" =
              let
                xmodmapConfig = pkgs.writeText "xmodmap" ''
                  !
                  ! Swap Caps_Lock and Control_L
                  !

                  ! replace capslock keys with Escape Keys
                  ! remove Lock = Caps_Lock
                  clear Lock
                  add Lock = Scroll_Lock

                  keysym Caps_Lock = Escape

                  ! Set Right function Key to Windows-key
                  keycode 135 = Super_R NoSymbol Super_R NoSymbol Super_R

                  ! Map umlauts to RIGHT ALT + <key>
                  keycode 108 = Mode_switch
                  keysym e = e E EuroSign
                  keysym c = c C cent
                  keysym a = a A adiaeresis Adiaeresis
                  keysym o = o O odiaeresis Odiaeresis
                  keysym u = u U udiaeresis Udiaeresis
                  keysym s = s S ssharp
                '';
                script = pkgs.writers.writeBash "autorandr" ''
                  ${pkgs.autorandr}/bin/autorandr --change
                  ${pkgs.xorg.xmodmap}/bin/xmodmap ${xmodmapConfig}
                  ${backgroundCommand}
                '';
              in
              "exec ${toString script}";

            # like vimperator

            "${cfg.config.modifier}+a" = "exec ${pkgs.i3-easyfocus}/bin/i3-easyfocus";
          };
        };
      };
    };
  };
}