{
  config,
  pkgs,
  ...
}:
let
  promptColours.success = "cyan";
  promptColours.failure = "red";
in
{
  programs.zsh =
    let
      zsh-completions = pkgs.fetchFromGitHub {
        owner = "zsh-users";
        repo = "zsh-completions";
        rev = "cf565254e26bb7ce03f51889e9a29953b955b1fb";
        sha256 = "1yf4rz99acdsiy0y1v3bm65xvs2m0sl92ysz0rnnrlbd5amn283l";
      };
    in
    {
      enable = true;
      enableCompletion = true;
      autosuggestions.enable = true;
      syntaxHighlighting.enable = true;
      syntaxHighlighting.highlighters = [
        "main"
        "brackets"
        "pattern"
        "line"
      ];
      interactiveShellInit = ''
        setopt INTERACTIVE_COMMENTS CORRECT
        setopt MULTIOS
        setopt AUTO_NAME_DIRS
        setopt AUTOCD CDABLE_VARS
        setopt HIST_IGNORE_ALL_DUPS
        setopt VI
        setopt AUTO_MENU
        setopt COMPLETE_IN_WORD
        setopt ALWAYS_TO_END
        unsetopt NOMATCH
        unsetopt MENU_COMPLETE

        zstyle ':completion:*:*:*:*:*' menu select
        zstyle ':completion:*' matcher-list 'm:{a-zA-Z-_}={A-Za-z_-}' 'r:|=*' 'l:|=* r:|=*'
        zstyle ':completion:*' special-dirs true
        zstyle ':completion:*' list-colors \'\'
        zstyle ':completion:*:*:kill:*:processes' list-colors '=(#b) #([0-9]#) ([0-9a-z-]#)*=01;34=0=01'
        zstyle ':completion:*:*:*:*:processes' command "ps -u $USER -o pid,user,comm -w -w"
        zstyle ':completion:*:cd:*' tag-order local-directories directory-stack path-directories

        export KEYTIMEOUT=1

        hash -d nixos=/etc/nixos niveum=${config.users.users.me.home}/sync/src/niveum

        autoload -U zmv run-help edit-command-line

        fpath=(${zsh-completions}/src $fpath)
      '';
      promptInit = ''
        autoload -Uz vcs_info
        zstyle ':vcs_info:*' enable git
        zstyle ':vcs_info:*' check-for-changes true
        zstyle ':vcs_info:*' stagedstr '%F{green}+%f'
        zstyle ':vcs_info:*' unstagedstr '%F{red}~%f'
        zstyle ':vcs_info:*' use-prompt-escapes true
        zstyle ':vcs_info:*' formats "%c%u%F{cyan}%b%f"
        zstyle ':vcs_info:*' actionformats "(%a) %c%u%F{cyan}%b%f"

        precmd () {
          vcs_info
          if [ -n "$SSH_CLIENT" ] || [ -n "$SSH_TTY" ] || [ -n "$SSH_CONNECTION" ]; then
            RPROMPT="$(hostname)"
          else
            RPROMPT="$vcs_info_msg_0_"
          fi
          if [[ -n $IN_NIX_SHELL ]]; then
            PROMPT='%B%~%b %(?.%F{${promptColours.success}}.%F{${promptColours.failure}})λ%f '
          else
            PROMPT='%B%~%b %(?.%F{${promptColours.success}}.%F{${promptColours.failure}})%#%f '
          fi
          print -Pn "\e]2;%n@%M:%~\a" # title bar prompt
        }

        zle-keymap-select zle-line-init () {
          case $KEYMAP in
            vicmd) print -n '\e]12;green\a';;
            viins|main) print -n '\e]12;gray\a';;
          esac
        }

        zle -N zle-line-init
        zle -N zle-keymap-select
        zle -N edit-command-line
        bindkey -M vicmd v edit-command-line
      '';
    };
}