uninstall

#!/usr/bin/env bash

DOTFILES_PATH="$HOME/.dotfiles"

function main() {
  ask_for_sudo
  run_modules_uninstall_tasks
  uninstall_ansible
  uninstall_homebrew
  uninstall_xcode_command_line_tools
  remove_dotfiles_repo
}

function ask_for_sudo() {
    info "Checking for \`sudo\` access (which may request your password)..."
    
    if sudo --validate &> /dev/null; then
        # Update `sudo` timestamp until script has finished
        # More info: https://gist.github.com/cowboy/3118588
        while true; do
          sudo --non-interactive true;
          sleep 60;
          kill -0 "$$" || exit
        done 2>/dev/null &

        success "Running script using \`sudo\` credentials..."
    else
        error "Request for \`sudo\` access failed"
        exit 1
    fi
}

function run_modules_uninstall_tasks() {
  info "Executing Ansible uninstall tasks"

  /opt/homebrew/bin/ansible-playbook \
    -i "$DOTFILES_PATH/inventory" \
    "$DOTFILES_PATH/main.yml" \
    --extra-vars "command=uninstall" \
    --ask-become-pass \
  || exit 1
}

function uninstall_ansible() {
    info "Uninstalling Ansible"
    if [[ "$(type -P ansible)" ]]; then
      if /opt/homebrew/bin/brew uninstall ansible; then
          success "Ansible uninstalled successfully"
      else
          error "Ansible uninstall process failed"
          exit 1
      fi
    else
        success "Ansible is not installed"
    fi
}

function uninstall_homebrew() {
    info "Uninstalling Homebrew"
    if [[ "$(type -P brew)" ]]; then
        url=https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh
        if yes | /bin/bash -c "$(curl -fsSL ${url})"; then
            success "Homebrew uninstalled successfully"
        else
            error "Homebrew uninstall process failed"
            exit 1
        fi
    else
        success "Homebrew is not installed"
    fi
}

function uninstall_xcode_command_line_tools() {
  info "Uninstalling Xcode command line tools"

    if [[ -d "$('xcode-select' -print-path 2>/dev/null)" ]]; then
      if sudo rm -rf "$('xcode-select' -print-path)"; then
          success "Xcode command line tools uninstalled successfully"
      else
          error "Fail trying to uninstall Xcode command line tools"
          exit 1
      fi
    else
        success "Xcode command line tools are not installed"
    fi
}

function remove_dotfiles_repo() {
  info "Removing dotfiles repository from ${DOTFILES_PATH}"

  if [[ -e "$DOTFILES_PATH" ]]; then
    if rm -rf "$DOTFILES_PATH"; then
        success "Dotfiles repo removed successfully"
    else
        error "Fail trying to remove ${DOTFILES_PATH}"
        exit 1
    fi
  fi
}

#
# Utilities
# 

# Adapted from https://github.com/Sajjadhosn/dotfiles
function colored_echo() {
    local color="$1";
    local exp="$2";
    local arrow="$3";
    if ! [[ $color =~ '^[0-9]$' ]] ; then
      case $(echo $color | tr '[:upper:]' '[:lower:]') in
        black) color=0 ;;
        red) color=1 ;;
        green) color=2 ;;
        yellow) color=3 ;;
        blue) color=4 ;;
        magenta) color=5 ;;
        cyan) color=6 ;;
        white|*) color=7 ;; # white or invalid color
      esac
    fi
    tput bold;
    tput setaf "$color";
    echo "$arrow $exp";
    tput sgr0;
}

function info() {
    colored_echo blue "$1" "==>"
}

function success() {
    colored_echo green "$1" "==>"
}

function error() {
    colored_echo red "$1" "==>"
}

main "$@"

unset -f \
  colored_echo \
  info \
  success \
  error \
  ask_for_sudo \
  run_modules_uninstall_tasks \
  uninstall_ansible \
  uninstall_homebrew \
  uninstall_xcode_command_line_tools \
  remove_dotfiles_repo \
  main