#!/bin/bash
# Pokémon Red (LÖVE2D) - double-click launcher for macOS.
#
# First run: decodes a user-provided .gb file, installs anything missing,
# builds the game data, then launches.
# Every later run: launches the game straight away.

cd "$(dirname "$0")" || exit 1

say()  { printf '\033[1;32m==>\033[0m %s\n' "$*"; }
warn() { printf '\033[1;33m !!\033[0m %s\n' "$*"; }
err()  { printf '\033[1;31merror:\033[0m %s\n' "$*"; }

pause_exit() { # keep the Terminal window readable after a failure
  echo
  read -n 1 -s -r -p "Press any key to close this window..."
  echo
  exit "${1:-0}"
}

ask() { # ask "question" -> yes by default
  local a
  read -r -p "$1 [Y/n] " a
  case "$a" in n|N|no|NO) return 1 ;; *) return 0 ;; esac
}

printf '\n  \033[1mPokémon Red - LÖVE2D port\033[0m\n\n'

have_love() {
  local app version
  for app in ".bazinga/love12/love.app" "/Applications/love12.app" "$HOME/Applications/love12.app" \
    "/Applications/love.app" "$HOME/Applications/love.app"; do
    [ -x "$app/Contents/MacOS/love" ] || continue
    version="$(/usr/libexec/PlistBuddy -c 'Print :CFBundleShortVersionString' "$app/Contents/Info.plist" 2>/dev/null || true)"
    printf '%s' "$version" | grep -Eq '^12(\.|$)' || continue
    otool -L "$app/Contents/Frameworks/love.framework/love" 2>/dev/null \
      | grep -q '/Metal.framework/' && return 0
  done
  return 1
}

# ---------------------------------------------------------------- fast path
if [ -f data/generated/maps.lua ] && have_love; then
  say "already set up, launching the game"
  scripts/run.sh || { err "the game failed to start"; pause_exit 1; }
  exit 0
fi

say "first-time setup"

# ------------------------------------------------------- Xcode CLT (python3)
if ! command -v python3 >/dev/null 2>&1; then
  warn "python3 is missing; it comes with Apple's command-line tools"
  if ask "Install Apple's command-line tools now?"; then
    xcode-select --install 2>/dev/null || true
    echo
    warn "Finish the Apple installer window that just opened, then"
    warn "double-click Play-Mac.command again to continue."
    pause_exit 0
  else
    err "cannot continue without python3"
    pause_exit 1
  fi
fi

if ! have_love && ! command -v xcodebuild >/dev/null 2>&1; then
  warn "LÖVE 12 is not installed and Xcode is required to build it for macOS."
  warn "Install Xcode from the App Store, launch it once, then run this again."
  pause_exit 1
fi

# ------------------------------------------------------------------- build
echo
scripts/setup.sh \
  || { err "setup failed - see the messages above"; pause_exit 1; }

say "setup done, launching the game"
scripts/run.sh || { err "the game failed to start"; pause_exit 1; }
exit 0