#!/bin/bash
# Pterodactyl NeoForge 21.1.248 startup for SciCraft
# Egg: ghcr.io/pterodactyl/yolks:java_21
# Startup Command in Panel: bash tools/pterodactyl-start.sh
# Or: bash run.sh (if you prefer the egg's default)
set -e

echo "======================================"
echo " SciCraft - Pterodactyl Bootstrap"
echo " NeoForge 21.1.248 | packwiz"
echo "======================================"

# 1. Install packwiz mods if pack.toml changed
if [ ! -f packwiz-installer-bootstrap.jar ]; then
  echo "[Ptero] Downloading packwiz installer..."
  curl -fsSL -o packwiz-installer-bootstrap.jar https://github.com/packwiz/packwiz-installer-bootstrap/releases/latest/download/packwiz-installer-bootstrap.jar
fi

echo "[Ptero] Syncing server pack..."
# Use local server_pack/pack.toml if present (Pterodactyl clones the repo), else fall back to git raw
if [ -f server_pack/pack.toml ]; then
  java -jar packwiz-installer-bootstrap.jar -g -s server server_pack/pack.toml
elif [ -f pack.toml ]; then
  java -jar packwiz-installer-bootstrap.jar -g -s server pack.toml
else
  # Fallback to remote (for Hytale misplaced folder)
  java -jar packwiz-installer-bootstrap.jar -g -s server https://git.mithraic.cloud/ad3laid3/SciCraft/raw/branch/main/server_pack/pack.toml
fi

# 2. Install NeoForge server if missing (generates user_jvm_args.txt, unix_args.txt, run.sh)
if [ ! -f libraries/net/neoforged/neoforge/21.1.248/unix_args.txt ]; then
  echo "[Ptero] Installing NeoForge 21.1.248 server..."
  if [ ! -f neoforge-21.1.248-installer.jar ]; then
    curl -fsSL -o neoforge-21.1.248-installer.jar https://maven.neoforged.net/releases/net/neoforged/neoforge/21.1.248/neoforge-21.1.248-installer.jar
  fi
  java -jar neoforge-21.1.248-installer.jar --installServer
fi

# 3. Ensure user_jvm_args.txt exists and respects Pterodactyl memory
# Pterodactyl injects {{SERVER_MEMORY}} as env var SERVER_MEMORY (MB)
# Preset: medium tier (4G-8G). Adjust via presets/low|high if needed
if [ ! -f user_jvm_args.txt ]; then
  echo "[Ptero] Creating user_jvm_args.txt from preset..."
  if [ -f presets/medium/server/jvm-flags.txt ]; then
    cp presets/medium/server/jvm-flags.txt user_jvm_args.txt
  elif [ -f server_pack/../presets/medium/server/jvm-flags.txt ]; then
    cp server_pack/../presets/medium/server/jvm-flags.txt user_jvm_args.txt
  else
    # Fallback minimal
    echo "-Xms4G -Xmx8G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -Dlog4j2.formatMsgNoLookups=true" > user_jvm_args.txt
  fi
fi

# Inject Pterodactyl memory if available (SERVER_MEMORY is in MB)
if [ -n "$SERVER_MEMORY" ]; then
  echo "[Ptero] Detected Pterodactyl SERVER_MEMORY=${SERVER_MEMORY}M, patching user_jvm_args.txt..."
  # Replace -Xmx value with Pterodactyl's allocation
  sed -i -E "s/-Xmx[0-9]+[GM]/-Xmx${SERVER_MEMORY}M/g" user_jvm_args.txt
  # Ensure -Xms is half of max or 4G min
  if grep -q "MaxRAMPercentage" user_jvm_args.txt; then
    sed -i -E "s/-XX:MaxRAMPercentage=[0-9.]+//g" user_jvm_args.txt
  fi
fi

# 4. Ensure run.sh is executable and correct
if [ ! -f run.sh ]; then
  echo "[Ptero] run.sh missing, regenerating..."
  echo '#!/usr/bin/env sh' > run.sh
  echo 'java @user_jvm_args.txt @libraries/net/neoforged/neoforge/21.1.248/unix_args.txt "$@"' >> run.sh
fi
chmod +x run.sh

echo "======================================"
echo " Starting SciCraft NeoForge 21.1.248"
echo " user_jvm_args.txt: $(cat user_jvm_args.txt | tr '\n' ' ')"
echo " unix_args.txt exists: $(test -f libraries/net/neoforged/neoforge/21.1.248/unix_args.txt && echo yes || echo no)"
echo "======================================"

# Pterodactyl expects to keep PID 1 and handle signals, so exec run.sh
exec bash run.sh nogui