#!/bin/bash
# Automated world backup — called by cron every 6 hours

BACKUP_DIR="/home/minecraft/server/backups"
WORLD_DIR="/home/minecraft/server/world"
MAX_BACKUPS=20
RCON_PASS="23991818cc169249f181436f2a29a013"
TIMESTAMP=$(date +%Y-%m-%d_%H-%M)

mkdir -p "$BACKUP_DIR"

# Check if server is running
if systemctl is-active --quiet minecraft.service; then
  # Disable saving and flush
  node -e "
    const { Rcon } = require('/home/minecraft/dashboard/node_modules/rcon-client');
    (async () => {
      try {
        const rcon = await Rcon.connect({ host: '127.0.0.1', port: 25575, password: '$RCON_PASS' });
        await rcon.send('save-off');
        await rcon.send('save-all flush');
        rcon.end();
      } catch {}
    })();
  "
  sleep 3
fi

# Create backup
tar czf "$BACKUP_DIR/world_${TIMESTAMP}.tar.gz" -C /home/minecraft/server world

# Validate backup was created and is non-empty
if [ ! -s "$BACKUP_DIR/world_${TIMESTAMP}.tar.gz" ]; then
  echo "ERROR: Backup file is empty or missing"
  exit 1
fi

# Re-enable saving
if systemctl is-active --quiet minecraft.service; then
  node -e "
    const { Rcon } = require('/home/minecraft/dashboard/node_modules/rcon-client');
    (async () => {
      try {
        const rcon = await Rcon.connect({ host: '127.0.0.1', port: 25575, password: '$RCON_PASS' });
        await rcon.send('save-on');
        rcon.end();
      } catch {}
    })();
  "
fi

# Prune old backups
cd "$BACKUP_DIR"
ls -t world_*.tar.gz 2>/dev/null | tail -n +$((MAX_BACKUPS + 1)) | xargs -r rm -f

echo "Backup complete: world_${TIMESTAMP}.tar.gz"