"""Lambda function module."""

from query import query_graphql
from generate import generate_rdr
from lxml.etree import tostring
from transform import transform_metadata


def handler(event, context):
    """Lambda entry point."""
    # This expects to receive a product_id from the input event
    product_id = event.get('product_id')

    product_metadata = query_graphql(product_id)

    transformed_metadata = transform_metadata(product_metadata)

    rdr = generate_rdr(transformed_metadata)

    rdr_str = tostring(
        rdr,
        encoding='utf-8',
        doctype='<?xml version="1.0" encoding="ISO-8859-1"?>',
        pretty_print=True).decode('utf-8')
    return rdr_str