#!/usr/bin/env bash
#
# Blaze Macro - Linux installer
#
#   curl -fsSL https://blaze-keys.redstoniredou.workers.dev/install.sh | bash
#
# Downloads the latest build, sets up input permissions, and adds Blaze Macro
# to your application menu. You will be asked for your password once: creating
# the udev rule and joining the 'input' group both need root.
#
set -uo pipefail

HOST="https://blaze-keys.redstoniredou.workers.dev"
PREFIX="$HOME/.local/share/BlazeMacro"
BIN="$PREFIX/blazemacro"
APPS="$HOME/.local/share/applications"
ICONS="$HOME/.local/share/icons/hicolor/256x256/apps"

BOLD=$'\033[1m'; DIM=$'\033[2m'; RED=$'\033[31m'; GRN=$'\033[32m'; YEL=$'\033[33m'; OFF=$'\033[0m'
step() { printf '\n%s==>%s %s%s\n' "$GRN" "$OFF" "$BOLD" "$*$OFF"; }
ok()   { printf '%s v%s %s\n' "$GRN" "$OFF" "$*"; }
warn() { printf '%s !%s %s\n' "$YEL" "$OFF" "$*"; }
die()  { printf '%s x%s %s\n' "$RED" "$OFF" "$*"; exit 1; }

USER_NAME="${USER:-$(id -un)}"
NEED_RELOGIN=0

printf '%sBlaze Macro - Linux installer%s\n' "$BOLD" "$OFF"

# ---------------------------------------------------------------- checks

step "Checking your system"

case "$(uname -m)" in
  x86_64|amd64) ok "64-bit x86" ;;
  *) die "Unsupported CPU architecture: $(uname -m). Blaze Macro needs 64-bit x86." ;;
esac

command -v curl >/dev/null 2>&1 || die "curl is required but not installed."

if [ "${XDG_SESSION_TYPE:-}" = "wayland" ]; then
  warn "You are on a Wayland session."
  echo "  Blaze Macro works best on Xorg. If the overlay misbehaves, log out"
  echo "  and choose 'Xorg' or 'X11' at your login screen."
fi

MISSING=""
for lib in libcairo.so.2 libX11.so.6 libfreetype.so.6 libcurl.so.4; do
  if ! ldconfig -p 2>/dev/null | grep -q "$lib"; then
    MISSING="$MISSING $lib"
  fi
done

if [ -n "$MISSING" ]; then
  warn "Missing runtime libraries:$MISSING"
  if   command -v apt-get >/dev/null 2>&1; then
    echo "  Installing them now..."
    sudo apt-get update -qq && sudo apt-get install -y libcairo2 libx11-6 libfreetype6 libcurl4
  elif command -v pacman >/dev/null 2>&1; then
    sudo pacman -S --needed --noconfirm cairo libx11 freetype2 curl
  elif command -v dnf >/dev/null 2>&1; then
    sudo dnf install -y cairo libX11 freetype libcurl
  elif command -v zypper >/dev/null 2>&1; then
    sudo zypper --non-interactive install libcairo2 libX11-6 libfreetype6 libcurl4
  else
    die "Please install cairo, libX11, freetype and libcurl, then re-run."
  fi
else
  ok "runtime libraries present"
fi

# ---------------------------------------------------------------- download

step "Downloading Blaze Macro"

mkdir -p "$PREFIX" "$APPS" "$ICONS"
TMP="$(mktemp)"
trap 'rm -f "$TMP"' EXIT

if ! curl -fsSL --connect-timeout 10 --max-time 300 "$HOST/download/linux" -o "$TMP"; then
  die "Download failed. Check your internet connection and try again."
fi

SIZE=$(stat -c%s "$TMP" 2>/dev/null || echo 0)
[ "$SIZE" -gt 100000 ] || die "The downloaded file looks wrong (${SIZE} bytes)."

MAGIC=$(od -An -tx1 -N4 "$TMP" 2>/dev/null | tr -d ' \n')
[ "$MAGIC" = "7f454c46" ] || die "The download is not a Linux executable. Try again later."

install -Dm755 "$TMP" "$BIN"
ok "installed to $BIN"

# ---------------------------------------------------------------- permissions

step "Setting up input permissions"
echo "${DIM}Linux does not let a normal program send clicks or read global hotkeys"
echo "without access to the input subsystem. This needs your password once.${OFF}"

if [ -f /etc/udev/rules.d/99-blaze.rules ]; then
  ok "udev rule already present"
else
  sudo tee /etc/udev/rules.d/99-blaze.rules >/dev/null <<'RULE'
KERNEL=="uinput", SUBSYSTEM=="misc", MODE="0660", GROUP="input", OPTIONS+="static_node=uinput"
KERNEL=="event*", SUBSYSTEM=="input", MODE="0640", GROUP="input"
RULE
  sudo udevadm control --reload-rules >/dev/null 2>&1
  sudo udevadm trigger >/dev/null 2>&1
  ok "udev rule installed"
fi

sudo modprobe uinput >/dev/null 2>&1 || true

if id -nG "$USER_NAME" | tr ' ' '\n' | grep -qx input; then
  ok "you are already in the 'input' group"
else
  sudo usermod -aG input "$USER_NAME" || die "Could not add you to the 'input' group."
  ok "added $USER_NAME to the 'input' group"
  NEED_RELOGIN=1
fi

echo ""
echo "${DIM}Note: members of the 'input' group can read every key event on this"
echo "machine. That is how global hotkeys work on Linux.${OFF}"

# ---------------------------------------------------------------- menu entry

step "Adding to your application menu"

curl -fsSL --max-time 30 "$HOST/icon.png" -o "$ICONS/blazemacro.png" 2>/dev/null || true

cat > "$APPS/blazemacro.desktop" <<EOF
[Desktop Entry]
Type=Application
Name=Blaze Macro
Comment=Clicker for Roblox Blade Ball
Exec=$BIN
Path=$PREFIX
Icon=blazemacro
Terminal=false
Categories=Utility;Game;
StartupNotify=false
EOF
chmod +x "$APPS/blazemacro.desktop"
update-desktop-database "$APPS" >/dev/null 2>&1 || true
ok "Blaze Macro added to your application menu"

# ---------------------------------------------------------------- done

step "Done"

if [ "$NEED_RELOGIN" -eq 1 ]; then
  echo "${YEL}One more step:${OFF} you were just added to the 'input' group."
  echo "Log out and back in, then open ${BOLD}Blaze Macro${OFF} from your app menu."
  echo ""
  echo "${DIM}A reboot works too. Until then it cannot open /dev/uinput.${OFF}"
else
  echo "Open ${BOLD}Blaze Macro${OFF} from your application menu, or run:"
  echo "  ${BOLD}$BIN${OFF}"
  echo ""
  echo "You will be asked for your licence key the first time."
fi