#!/bin/bash

set -e

# Variables
TOMCAT_VERSION=10.1.26
TOMCAT_USER=ubuntu
TOMCAT_GROUP=ubuntu
TOMCAT_HOME=/home/ubuntu/tomcat

echo "Updating package list..."
sudo apt update

echo "Downloading Apache Tomcat..."
wget https://dlcdn.apache.org/tomcat/tomcat-10/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz -O /tmp/apache-tomcat-$TOMCAT_VERSION.tar.gz

echo "Extracting Tomcat..."
sudo mkdir -p $TOMCAT_HOME
sudo tar xzvf /tmp/apache-tomcat-$TOMCAT_VERSION.tar.gz -C $TOMCAT_HOME --strip-components=1

echo "Setting permissions for Tomcat directories..."
sudo chown -R $TOMCAT_USER:$TOMCAT_GROUP $TOMCAT_HOME
sudo chmod -R u+x $TOMCAT_HOME/bin

echo "Creating Tomcat systemd service file..."
cat <<EOL | sudo tee /etc/systemd/system/tomcat.service
[Unit]
Description=Apache Tomcat Web Application Container
After=network.target

[Service]
Type=forking

User=$TOMCAT_USER
Group=$TOMCAT_GROUP

Environment="JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64"
Environment="CATALINA_PID=$TOMCAT_HOME/temp/tomcat.pid"
Environment="CATALINA_HOME=$TOMCAT_HOME"
Environment="CATALINA_BASE=$TOMCAT_HOME"
Environment="CATALINA_OPTS=-Xms2048M -Xmx3072M -server -XX:MinRAMPercentage=50 -XX:MaxRAMPercentage=80"
Environment="JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom"
Environment="JAVA_TOOL_OPTIONS=-Dencryption.keystore.type=JCEKS -Dencryption.cipherAlgorithm=DESede/CBC/PKCS5Padding -Dencryption.keyAlgorithm=DESede -Dencryption.keystore.location=/home/ubuntu/keystore/metadata-keystore/keystore -Dmetadata-keystore.password=mp6yc0UD9e -Dmetadata-keystore.aliases=metadata -Dmetadata-keystore.metadata.password=oKIWzVdEdA -Dmetadata-keystore.metadata.algorithm=DESede"

ExecStart=$TOMCAT_HOME/bin/startup.sh
ExecStop=$TOMCAT_HOME/bin/shutdown.sh

[Install]
WantedBy=multi-user.target
EOL

echo "Reloading systemd daemon..."
sudo systemctl daemon-reload

echo "Starting Tomcat service..."
sudo systemctl start tomcat

echo "Stopping Tomcat service..."
sudo systemctl stop tomcat

echo "Enabling Tomcat service to start on boot..."
sudo systemctl enable tomcat

echo "Apache Tomcat installation and setup completed successfully!"