{ userConfig, ... }:

{
  programs.fish = {
    enable = true;
    loginShellInit = # fish
      ''
        fish_add_path --move --prepend --path "$HOME/.nix-profile/bin" /nix/var/nix/profiles/default/bin /run/current-system/sw/bin
      '';

    interactiveShellInit = # fish
      ''
        # no dum greeting
        set fish_greeting ""

        set -gx GPG_TTY (tty)

        fish_vi_key_bindings

        direnv hook fish | source

        fastfetch --config ~/.config/fastfetch/startup.jsonc
      '';

    functions = {
      edit_dotfile = {
        description = "Edit config file, reload, commit and push";
        body = # fish
          ''
            set -l config_dir "$HOME/.config/home-manager"
            set -l file

            if test (count $argv) -gt 0
                set file $argv[1]
            else
                set file (fd . $config_dir --type f --exclude ".git" | fzf)
            end

            if test -n "$file"
                set -l md5_before (md5sum $file)
                pushd $config_dir
                
                nvim $file

                if test "$md5_before" != (md5sum $file)
                    echo "Changes made. Preparing commit..."
                    
                    set -l rel_file (realpath --relative-to=$config_dir $file)
                    
                    if nh home switch $config_dir
                        git add -A
                        set commit_msg "update: $rel_file"
                        git commit -m "$commit_msg"
                        git push
                    end
                else
                    echo "No changes made"
                end
                popd 
            end
          '';
      };

      reload_dotfiles = {
        body = # fish
          "nh home switch ~/.config/home-manager";
      };

      reload_system = {
        body = # fish
          "nh os switch /etc/nixos/";
      };

      cp_mail = {
        body = # fish
          "pandoc $argv -t html |wl-copy -t text/html";
      };

      update_files = {
        body =
          # fish
          ''
            echo "=== System packages updates ==="
            pushd /etc/nixos

            git add -A
            git commit -m 'chore: state before pulling'

            if git pull
                reload_system
            end

            popd

            echo "=== User packages update ==="
            pushd $HOME/.config/home-manager

            git add -A 
            git commit -m 'chore: state before pulling'

            if git pull
              reload_dotfiles
            end

            popd
          '';

      };

     # update = {
     #   body =
     #     if userConfig.isNixOS then
     #       # fish
     #       ''
     #         echo "=== System packages update ==="
     #         pushd /etc/nixos

     #         if git pull
     #           git add -A
     #           git commit --allow-empty -m "chore: state before system update"
     #           
     #           nix flake update
     #           
     #           if test $status -eq 0
     #               git add ./flake.lock
     #               git commit --allow-empty -m "chore: update system flake.lock"
     #               reload_system 
     #               git push
     #           else
     #               echo "Error while updating system flake!"
     #           end
     #         else
     #           echo "Error: 'git pull' failed in /etc/nixos. Skipping system update."
     #         end

     #         popd

     #         echo "=== User packages update ==="
     #         pushd $HOME/.config/home-manager

     #         if git pull
     #           git add -A
     #           git commit --allow-empty -m "chore: state before home-manager update"
     #           
     #           nix flake update
     #           
     #           if test $status -eq 0
     #               git add ./flake.lock
     #               git commit --allow-empty -m "chore: update home flake.lock"
     #               git push
     #               reload_dotfiles
     #           else
     #               echo "Error while updating home flake!"
     #           end
     #         else
     #           echo "Error: 'git pull' failed in home-manager. Skipping user update."
     #         end

     #         popd

     #         if type -q flatpak
     #           echo "=== Flatpak update ==="
     #           flatpak update --noninteractive
     #           
     #           echo "=== Flatpak remove unused ==="
     #           flatpak uninstall --unused --noninteractive
     #         end
     #       ''
     #     else
     #       # fish
     #       ''
     #         echo "===System update==="

     #         if not type -q yay
     #           echo "Yay not found… Please consider installing it!"
     #         else
     #           yay
     #         end

     #         if type -q pacman
     #             echo "===Remove orphans==="
     #             set orphans (pacman -Qtdq)
     #             if test (count $orphans) -gt 0
     #                 sudo pacman -Rns $orphans
     #             end
     #         end

     #         if type -q flatpak
     #             echo "===Flatpak update==="
     #             flatpak update --noninteractive
     #             echo "===Flatpak remove unused==="
     #             flatpak uninstall --unused
     #         end

     #         if type -q nix-channel
     #             echo "===Nix update==="
     #             nix-channel --update
     #             echo "===Nix garbage collection==="
     #             home-manager expire-generations "-7 days"
     #         end
     #       '';
     # };

      blog_build_and_push = {
        body =
          # fish
          ''
            set USER szymon
            set HOST dmowski
            set DIR /srv/blog/
            set blog_dir ~/Dokumenty/blog

            pushd $blog_dir || exit 1

            hugo build && rsync -avz --delete public/ $USER@$HOST:$DIR

            popd

            exit 0
          '';
      };
    };
    shellAliases = {
      ls = "eza --long --icons --group-directories-first --git";
      lst = "eza --long --icons --color --git --tree";
      rm = "trash";
      update = "topgrade";
    };
  };
}