#!/usr/bin/env bash

set -eu
set -o pipefail

: ${NAPSAC_PATH:="$HOME/napsac"}
: ${NAPSAC_BRANCH:="master"}

ARGS=('')
for a in "$@"; do
  ARGS=(${ARGS[@]} "$a")
done

clone_napsac() {
  local git_dir="$NAPSAC_PATH/.git"

  if [ -d "$git_dir" ]; then
    echo 'Updating repo...'

    if [ "$(git --git-dir="$git_dir" symbolic-ref --short HEAD 2> /dev/null)" != "master" ]; then
      echo 'skip (working on a non-master branch)'
      return
    fi

    if ! git --git-dir="$git_dir" diff --no-ext-diff --quiet --exit-code > /dev/null 2>&1; then
      echo 'skip (unstaged changes present)'
      return
    fi

    if ! git --git-dir="$git_dir" diff-index --cached --quiet HEAD -- > /dev/null 2>&1; then
      echo 'skip (uncommitted changes present)'
      return
    fi

    git --git-dir="$git_dir" pull origin master
    echo 'done'
  elif ! [ -d "$NAPSAC_PATH" ]; then
    echo 'Cloning repo...'
    git clone git://github.com/ngtk/napsac.git --branch $NAPSAC_BRANCH $NAPSAC_PATH
    echo 'done'
  fi
}

check_xcode_license_approved() {
  echo 'Agreeing to Xcode license...'

  local has_error=0

  if ! [[ "$(/usr/bin/xcrun clang 2>&1 || true)" =~ 'license' ]]; then
    echo 'skip (already approved)'
    return
  fi

  sudo expect -c '
    set timeout 3
    spawn xcodebuild -license
    expect {
      timeout { exit 2 }
      -exact "for more" {
        send "G"
        exp_continue
      }
      -exact "agree, print, cancel" {
        send "agree\n"
        exp_continue
      }
      -exact "You can view the license agreements" {
        exit 0
      }
    }
  ' > /dev/null || has_error=1

  [ $has_error -eq 1 ] && sudo xcodebuild -license

  echo 'done'
}

install_homebrew() {
  command -v 'brew' > /dev/null 2>&1 && return

  echo 'Installing homebrew...'
  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null
  echo 'done'
}

install_ansible() {
  command -v 'ansible' > /dev/null 2>&1 && return

  echo 'Installing ansible...'
  brew install ansible
  echo 'done'
}

run_provisioning() {
  $NAPSAC_PATH/provisioning/play.sh ${ARGS[@]}
}

main() {
  check_xcode_license_approved
  clone_napsac
  install_homebrew
  install_ansible
  run_provisioning
}

main