#!/bin/bash

set -e

# i'm not crazy about this because there exists at least one ansible module
# to install and manage homebrew. but there's a chicken and egg problem because
# python and ansible need to be installed somehow and the best way to do that
# on macos is with homebrew...

if [[ -z $MF_HOMEBREW_STYLE ]]; then
  echo >&2 "error: please supply the brewfile to install"
  exit 1
fi

if command -v brew > /dev/null 2>&1; then
  echo >&2 "error: homebrew is already installed!"
  echo >&2 "error: please run brew bundle install directly"
  exit 1
fi

# disable homebrew analytics
export HOMEBREW_NO_ANALYTICS=1

# prompt for sudo password right away
sudo echo -n

if [[ $(uname -m) == arm64 ]]; then
  # install rosetta _before_ homebrew because some installers need it
  sudo /usr/sbin/softwareupdate --install-rosetta --agree-to-license
fi

# i'm really not a fan of this pattern but I don't have a better idea right now
hburl=https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh
/bin/bash -c "$(curl -fsSL "$hburl")"

if [[ $(uname -m) == arm64 ]]; then
  eval "$(/opt/homebrew/bin/brew shellenv)"
else
  eval "$(/usr/local/bin/brew shellenv)"
fi

if ! command -v brew > /dev/null 2>&1; then
  echo >&2 "error: it appears that homebrew installation was not successful"
  exit 1
fi

wdir="$(mktemp -d)"
sdir="$(pwd)"
cd "$wdir"

git clone https://github.com/mfinelli/arch-install.git
cd arch-install/macos

if [[ ! -f $MF_HOMEBREW_STYLE.brewfile ]]; then
  cd "$sdir"
  rm -rf "$wdir"

  echo >&2 "error: unable to find brewfile $MF_HOMEBREW_STYLE"
  exit 1
fi

brew bundle install --file "$MF_HOMEBREW_STYLE.brewfile"

if ! command -v ansible-playbook > /dev/null 2>&1; then
  cd "$sdir"
  rm -rf "$wdir"

  echo >&2 "error: ansible was not installed so we can't proceed"
  exit 1
fi

# for stuff that we can't manage with homebrew
ansible-galaxy install -r requirements.yml
ansible-playbook "$MF_HOMEBREW_STYLE.yml"

cd "$sdir"
rm -rf "$wdir"

exit 0