{ config, pkgs, ... }:

{
  programs.zsh = {
    enable = true;

    dotDir = ".config/zsh";

    history = {
      extended = true;
    };

    localVariables = {
      # Enable Oh My Zsh history timestamp output.
      # See: https://github.com/ohmyzsh/ohmyzsh/wiki/Settings#hist_stamps
      HIST_STAMPS = "yyyy-mm-dd";
    };

    # Make use of Oh My Zsh
    # See the projects sites:
    # https://ohmyz.sh/
    # https://github.com/ohmyzsh/ohmyzsh/
    # See the projects documentation:
    # https://github.com/ohmyzsh/ohmyzsh/wiki
    oh-my-zsh = {
      enable = true;
      theme = "agnoster";
      custom = "/home/forestcat/.config/oh-my-zsh-custom";
      plugins = [
        "history-substring-search"
        "timer"
        "pass"
      ];
      extraConfig = ''
        # Only show the command execution timer, if the command ran for at least 15 seconds.
        TIMER_THRESHOLD=15
      '';
    };

    initExtra = ''
      nx() {
        nix shell nixpkgs/nixos-23.11#$@
      }

      # history-substring-search configuration
      # See: https://github.com/ohmyzsh/ohmyzsh/tree/master/plugins/history-substring-search#configuration
      # Ensure unique search results in history-substring-search.
      # Needs to be set here instead of in oh-my-zsh.extraConfig to work apparently.
      HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE=1
    '';

    shellAliases = {
      # Others.
      miau = "echo miau";
      ll = "ls -l";
      cheetah = "curl -d 'Lena: Done ✓' https://ntfy.forestcat.org/cheetah";
      rebuild = "sudo nixos-rebuild switch --flake ~/nix-configs/ --show-trace";
    };
  };
}