#!/bin/sh
# entrypoint.sh

set -e # Exit immediately if a command exits with a non-zero status.

DATA_FILE_PATH="/data/weight-tracker-data.json"
DATA_DIR="/data"
APP_USER="nginx" # This should match the user set in supervisord.conf for your Node.js app

# 1. Ensure the data directory exists and is owned by APP_USER.
#    The -p flag for mkdir ensures it doesn't error if the directory already exists.
if ! mkdir -p "${DATA_DIR}"; then
    echo "Error: Could not create data directory ${DATA_DIR}. Exiting."
    exit 1
fi

if ! chown "${APP_USER}:${APP_USER}" "${DATA_DIR}"; then
    echo "Error: Could not set ownership of ${DATA_DIR} to ${APP_USER}. Exiting."
    # This might happen if the volume is mounted with very restrictive host permissions.
    # For now, we'll try to proceed, as the file chown might still work or be more critical.
    # Consider exiting 1 here if directory ownership is strictly required for other reasons.
fi

# 2. Ensure the data file itself is writable by APP_USER.
#    Touching it creates it if it doesn't exist.
#    Chowning it ensures the correct user owns it, even if it pre-existed with root ownership from a volume mount.
if ! touch "${DATA_FILE_PATH}"; then
    echo "Error: Could not touch/create data file ${DATA_FILE_PATH}. Exiting."
    exit 1
fi

if ! chown "${APP_USER}:${APP_USER}" "${DATA_FILE_PATH}"; then
    echo "Error: Could not set ownership of ${DATA_FILE_PATH} to ${APP_USER}. Exiting."
    exit 1
fi

echo "Entrypoint: Permissions for ${DATA_FILE_PATH} set for user ${APP_USER}."

# 3. Execute the main command passed to this script (e.g., supervisord)
exec "$@"