{ pkgs, ... }:
{
  environment.systemPackages = with pkgs; [
    any-nix-shell
  ];

  users.defaultUserShell = pkgs.zsh;

  programs.zsh = {
    enable = true;
    enableBashCompletion = true;
    enableCompletion = true;
    autosuggestions.enable = true;
    syntaxHighlighting.enable = true;

    shellInit = # zsh
      ''
        # Directory containing the Python scripts
        SCRIPT_DIR="/etc/nixos/scripts/py"

        # Ensure the directory exists
        if [[ ! -d "$SCRIPT_DIR" ]]; then
            echo "Directory $SCRIPT_DIR does not exist."
            return 1
        fi

        # Register aliases for each .py file in the directory
        for script in "$SCRIPT_DIR"/*.py; do
            [[ -f "$script" ]] || continue  # Skip if no .py files found
            script_name="''${script##*/}"  # Extract filename
            alias_name="''${script_name%.py}"  # Strip .py extension
            alias "$alias_name"="\"$script\""
        done

        _edit() {
          local args=("$@")
          if [[ ''${#args[@]} -eq 0 ]]; then
              args=(".")
          fi
          if [[ -n "$SSH_CONNECTION" ]]; then
              command "$EDITOR" "''${args[@]}"
          else
              command "$VISUAL" "''${args[@]}"
          fi
        }

        if (( $+commands[kitten] )); then
          alias "ssh"="kitten ssh"
        fi

        source ${pkgs.nix-index}/etc/profile.d/command-not-found.sh
      '';

    promptInit = # zsh
      ''
        ${pkgs.any-nix-shell}/bin/any-nix-shell zsh --info-right | source /dev/stdin
      '';

    shellAliases = {
      ff = "fastfetch";
      neofetch = "fastfetch";
      nf = "fastfetch";
      lg = "lazygit";
      lad = "lazydocker";
      clip = "wl-copy";
      clp = "clip";
      paste = "wl-paste";
      cat = "bat";
      git = "hub";
      cc = "fj --host=https://c.csw.im  --style=fancy";
      cb = "fj --host https://codeberg.org --style=fancy";
      eza = "eza --time-style=long-iso --icons=auto --hyperlink";
      l = "eza -lhg";
      la = "eza -lAh";
      ll = "l";
      ls = "eza";
      lsa = "eza -lah";
      tree = "eza --tree --git-ignore";
      nixpkgs-update = "nix run ;--option extra-substituters 'https://nix-community.cachix.org/' --option extra-trusted-public-keys 'nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=' github:ryantm/nixpkgs-update --";
      nixrc = "edit /etc/nixos";
      taildrop = "tailscale file";
      forgejo-runner = "act_runner";
      runactions = "act_runner exec --default-actions-url=https://c.csw.im --gitea-instance=https://c.csw.im";
      uvr = "uv run";
      ns = "nix-shell";
      edit = "_edit";
      e = "edit";
      c = "clear";
      sudo = "sudo ";
      s = "sudo";
    };

    histSize = 10000;
    histFile = "$HOME/.zsh_history";
  };

  # starship - a customizable prompt for any shell
  programs.starship = {
    enable = true;
    # custom settings
    settings = {
      format = "[](bg:#1e1e2e fg:#a6e3a1)$username$hostname[](fg:#a6e3a1 bg:#89b4fa)$directory[](fg:#89b4fa bg:#cba6f7)$direnv[](fg:#cba6f7 bg:#f9e2af)$git_branch$git_status[](fg:#f9e2af bg:#1e1e2e)$character";
      username = {
        show_always = true;
        format = "[ $user@]($style)";
        style_user = "fg:#313244 bg:#a6e3a1";
        style_root = "fg:#313244 bg:#a6e3a1";
      };
      hostname = {
        ssh_only = false;
        format = "[$hostname $ssh_symbol]($style)";
        style = "fg:#313244 bg:#a6e3a1";
      };
      directory = {
        format = "[ $path ]($style)";
        style = "fg:#313244 bg:#89b4fa";
      };
      git_branch = {
        format = "[ $symbol$branch(:$remote_branch) ]($style)";
        symbol = "  ";
        style = "fg:#313244 bg:#f9e2af";
      };
      direnv = {
        symbol = "󱄅 ";
        format = "[ $symbol$loaded/$allowed ]($style)";
        disabled = false;
        style = "fg:#313244 bg:#cba6f7";
      };
      git_status = {
        format = "[$all_status]($style)";
        style = "fg:#313244 bg:#f9e2af";
      };
      git_metrics = {
        format = "([+$added]($added_style))[]($added_style)";
        added_style = "fg:#313244 bg:#f9e2af";
        deleted_style = "fg:bright-red bg:235";
        disabled = false;
      };
      hg_branch = {
        format = "[ $symbol$branch ]($style)";
        symbol = " ";
      };
      cmd_duration = {
        format = "[  $duration ]($style)";
        style = "fg:bright-white bg:18";
      };
      character = {
        success_symbol = "[ ](#a6e3a1) ";
        error_symbol = "[ ✗](#f38ba8) ";
      };
      add_newline = false;
    };
  };
}