"""Lambda function module."""

from query import query_graphql
from generate import generate_ern_srr
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
    isrc = event.get('isrc')

    sound_recording_metadata = query_graphql(isrc)

    transformed_metadata = transform_metadata(sound_recording_metadata)

    ern_srr = generate_ern_srr(transformed_metadata)

    ern_srr_str = tostring(
        ern_srr,
        encoding='utf-8',
        doctype='<?xml version="1.0" encoding="utf-8"?>',
        pretty_print=True).decode('utf-8')
    return ern_srr_str