#!/bin/bash
set -e

# Path to the ECS metadata file
METADATA_FILE=$(cat "$ECS_CONTAINER_METADATA_FILE")

if [ -f "$METADATA_FILE" ]; then
    # Extract HostPrivateIPv4Address from the metadata file
    HOST_PRIVATE_IP=$(jq -r '.HostPrivateIPv4Address' < "$METADATA_FILE")
    if [ "$HOST_PRIVATE_IP" != "null" ]; then
        echo "Host Private IP: $HOST_PRIVATE_IP"
        export HOST_PRIVATE_IP

        # Define the input template file and output file
        TEMPLATE_FILE="filebeat.template.yml"
        OUTPUT_FILE="filebeat.yml"

        mkdir -p /opt/filebeat-configs/${HOST_PRIVATE_IP}

        # Replace the placeholder with the actual node name and write to the output file
        sed "s/{{HOST_PRIVATE_IP}}/${HOST_PRIVATE_IP}/g" "/opt/filebeat-configs/$TEMPLATE_FILE" > "/opt/filebeat-configs/${HOST_PRIVATE_IP}/$OUTPUT_FILE"
        echo "Filebeat configuration file created: $OUTPUT_FILE"

        # Create symlinks
        rm -rf /usr/share/filebeat/elk
        ln -sf "/opt/logs/${HOST_PRIVATE_IP}/elk" /usr/share/filebeat/elk
        ln -sf "/opt/filebeat-configs/${HOST_PRIVATE_IP}/filebeat.yml" /usr/share/filebeat/filebeat.yml
    else
        echo "HostPrivateIPv4Address not found in metadata file"
    fi
else
    echo "Metadata file does not exist"
fi

# Run the original filebeat entrypoint
exec /usr/bin/tini -- /usr/local/bin/docker-entrypoint "$@"