#!/usr/bin/env sh
set -eu

# Properly detect requested redirect
if [ "${REDIRECT_PROTO}" == "auto" ]; then
    REDIRECT_PROTO="\$http_x_forwarded_proto";
elif [ "${REDIRECT_PROTO}" != "http" ] && [ "${REDIRECT_PROTO}" != "https" ]; then
    echo "ERROR: Invalid value for REDIRECT_PROTO, got '${REDIRECT_PROTO}'" >&2
    echo "ERROR: Valid values are: 'auto', 'http' or 'https'" >&2
    exit 1
fi

# Replace templates in nginx config
for file in /etc/nginx/*/*.tpl; do
    sed \
        -e "s#{{DOCUMENT_ROOT}}#${DOCUMENT_ROOT}#g" \
        -e "s#{{REDIRECT_CODE}}#${REDIRECT_CODE}#g" \
        -e "s#{{REDIRECT_PROTO}}#${REDIRECT_PROTO}#g" \
        "${file}" \
        > "${file%.tpl}"
done

# Activate the right
rm -f /etc/nginx/sites-enabled/redirect-*.conf
if [[ -f "/etc/nginx/sites-available/redirect-${REDIRECT_MODE}.conf" ]]; then
    ln -s \
        "/etc/nginx/sites-available/redirect-${REDIRECT_MODE}.conf" \
        "/etc/nginx/sites-enabled/redirect-${REDIRECT_MODE}.conf"
fi

exec /usr/bin/supervisord -c /etc/supervisord.conf