#!/bin/bash
# ==================================================
# Kerbal Space Program - LunaMultiplayer Server Installer
# ==================================================
# Runs inside container using Ptero-Eggs .NET 5 yolk base

chown -R root:root /mnt
export HOME=/mnt/server

cd /mnt/server

# Determine version to install
if [ -z "${LMP_VERSION}" ]; then
    echo "No version specified, downloading latest release..."
    RELEASE_URL=$(curl -s https://api.github.com/repos/LunaMultiplayer/LunaMultiplayer/releases/latest | grep browser_download_url | grep 'Server-Release.zip' | cut -d '"' -f 4)
else
    echo "Downloading specified version: ${LMP_VERSION}"
    RELEASE_URL="https://github.com/LunaMultiplayer/LunaMultiplayer/releases/download/${LMP_VERSION}/LunaMultiplayer-Server-Release.zip"
fi

if [ -z "${RELEASE_URL}" ]; then
    echo "Failed to fetch release URL from GitHub!"
    exit 1
fi

echo "Downloading LunaMultiplayer Server from: ${RELEASE_URL}"
curl -L -o LMPServer.zip "${RELEASE_URL}"
unzip -o LMPServer.zip -d .
rm -f LMPServer.zip

# Normalize extracted structure if necessary
if [ -d LMPServer/Server ]; then
    mv LMPServer/Server/* LMPServer/ || true
fi

# Ensure executable permissions
chmod +x LMPServer/Server 2>/dev/null || true

# Create default config if missing
mkdir -p LMPServer/Config
if [ ! -f LMPServer/Config/ConnectionSettings.xml ]; then
    cat > LMPServer/Config/ConnectionSettings.xml <<EOF
<?xml version="1.0" encoding="utf-16"?>
<ConnectionSettingsDefinition xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <!--The address the server listens on. If set to the unspecified IPv6 address [::], the server listens for both IPv6 and IPv4-->
  <ListenAddress>0.0.0.0</ListenAddress>
  <!--The UDP port the server listens on. You don't need to open it on your router if RegisterWithMasterServer = true. If you want that players can connect against your server MANUALLY you will need to open it on your router-->
  <Port>${SERVER_PORT}</Port>
  <!--Heartbeat interval in ms. MUST be lower than the ConnectionMsTimeout value.-->
  <HearbeatMsInterval>1000</HearbeatMsInterval>
  <!--Connection timeout in ms. If no heartbeats are received after this interval, the client is disconnected.-->
  <ConnectionMsTimeout>30000</ConnectionMsTimeout>
  <!--Tries to use UPnP to open the ports in your router-->
  <Upnp>true</Upnp>
  <!--UPnP timeout in ms for trying to open the ports-->
  <UpnpMsTimeout>5000</UpnpMsTimeout>
  <!--Maximum transmission unit (MTU) size in bytes. Min value is 1. Default value is 1408. Max value is 8192.-->
  <MaximumTransmissionUnit>1408</MaximumTransmissionUnit>
  <!--Try to expand MTU size-->
  <AutoExpandMtu>false</AutoExpandMtu>
</ConnectionSettingsDefinition>
EOF
fi

echo "-----------------------------------------"
echo "Installation completed..."
echo "-----------------------------------------"