#!/bin/sh
# Builds padmon and (re)loads the launchd agent that runs `padmon daemon` at login.
# The agent runs ~/Applications/padmon.app (an ad-hoc-signed bundle, so macOS can grant
# it Bluetooth permission). The Claude Code hooks and the statusline use target/release/padmon.
set -eu

repo=$(cd "$(dirname "$0")/.." && pwd)
bin="$repo/target/release/padmon"
label=dev.padmon.daemon
plist="$HOME/Library/LaunchAgents/$label.plist"
log="$HOME/Library/Logs/padmon.log"
domain="gui/$(id -u)"

cd "$repo"
devenv shell -q --no-tui -- cargo build --release
for lib in $(otool -L "$bin" | awk '/\/nix\/store\/.*libiconv/ {print $1}'); do
  install_name_tool -change "$lib" /usr/lib/libiconv.2.dylib "$bin" 2>/dev/null
done
codesign -s - --force "$bin" 2>/dev/null
mkdir -p "$HOME/Library/LaunchAgents" "$HOME/Library/Logs"

app="$HOME/Applications/padmon.app"
exe="$app/Contents/MacOS/padmon"
info="$app/Contents/Info.plist"
stamp="$repo/target/padmon.app.stamp"
new_info=$(cat <<'EOF'
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>CFBundleIdentifier</key><string>dev.padmon.daemon</string>
  <key>CFBundleName</key><string>padmon</string>
  <key>CFBundleExecutable</key><string>padmon</string>
  <key>CFBundlePackageType</key><string>APPL</string>
  <key>CFBundleVersion</key><string>1</string>
  <key>LSUIElement</key><true/>
  <key>NSBluetoothAlwaysUsageDescription</key><string>padmon writes session colors to the JP-Mini pad controller over Bluetooth.</string>
</dict>
</plist>
EOF
)

launchctl bootout "$domain/$label" 2>/dev/null || true

# Replace and re-sign only when the build or Info.plist changed: a new signature makes macOS ask for Bluetooth permission again.
want=$({ shasum -a 256 < "$bin"; printf '%s\n' "$new_info" | shasum -a 256; echo system-libiconv; })
if [ ! -x "$exe" ] || [ "$(cat "$stamp" 2>/dev/null)" != "$want" ]; then
  mkdir -p "$app/Contents/MacOS"
  cp "$bin" "$exe.new"
  # The Nix toolchain links libiconv from /nix/store. At login, launchd can start the daemon
  # before the Nix volume is mounted, so use the system copy (in the dyld shared cache).
  for lib in $(otool -L "$exe.new" | awk '/\/nix\/store\/.*libiconv/ {print $1}'); do
    install_name_tool -change "$lib" /usr/lib/libiconv.2.dylib "$exe.new" 2>/dev/null
  done
  if otool -L "$exe.new" | grep -q /nix/store; then
    echo "warning: padmon still uses a library from /nix/store; the daemon may fail at login:" >&2
    otool -L "$exe.new" | grep /nix/store >&2
  fi
  mv -f "$exe.new" "$exe"   # new inode: never modify a mapped signed binary
  printf '%s\n' "$new_info" > "$info"
  codesign -s - --force "$app"
  printf '%s\n' "$want" > "$stamp"
  echo "padmon.app updated. macOS asks once for Bluetooth permission when the controller is next used over Bluetooth."
fi

cat > "$plist" <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>Label</key><string>$label</string>
  <key>ProgramArguments</key>
  <array><string>$exe</string><string>daemon</string></array>
  <key>RunAtLoad</key><true/>
  <key>KeepAlive</key><true/>
  <key>ThrottleInterval</key><integer>5</integer>
  <key>ProcessType</key><string>Interactive</string>
  <key>StandardErrorPath</key><string>$log</string>
</dict>
</plist>
EOF

launchctl bootout "$domain/$label" 2>/dev/null || true
sleep 1 # bootstrap right after bootout often fails with "5: Input/output error"
launchctl bootstrap "$domain" "$plist" || { sleep 2; launchctl bootstrap "$domain" "$plist"; }

echo "padmon daemon loaded ($label). Log: $log"