from typing import Dict, Any, List


def map_access_right(ar: str) -> str:
    match ar:
        case 'open':
            return 'Open Access'
        case 'closed':
            return 'Closed'
        case 'embargo':
            return 'Embargo'
        case 'restricted':
            return 'Restricted'
        case _:
            return ''


def trasform_graph_entity(p: dict) -> dict:
    p['_id'] = p['local_identifier']
    return p


def trasform_catalog_entity(p: dict) -> dict:
    p['_id'] = p['id']
    return p


def map_fos_topic_to_domain(fos: str):
    if fos.startswith('01'):
        return 'Natural Sciences'
    elif fos.startswith('02'):
        return 'Engineering & Technology'
    elif fos.startswith('03'):
        return 'Medical & Health Sciences'
    elif fos.startswith('04'):
        return 'Agricultural Sciences'
    elif fos.startswith('05'):
        return 'Social Sciences'
    elif fos.startswith('06'):
        return 'Humanities'

    return None


def trasform_interoperability(p: dict) -> dict:
    p = trasform_catalog_entity(p)
    if 'domain' in p:
        p['domain'] = {"domain": p['domain']}
    p['licenseDetails'] = p['license']
    p['license'] = p['license']['identifier'] if 'identifier' in p['license'] else ''
    return p


def trasform_product(p: dict) -> dict:
    p = trasform_graph_entity(p)
    p['accessRights'] = list(set(
        filter(lambda ar: ar != '', map(lambda m: map_access_right(m.get('access_right')), p.get('manifestations')))))
    p['keyword'] = list(set(
        map(lambda topic: topic.get('topic').get('value'),
            filter(lambda topic: topic.get('topic').get('scheme') == 'keyword', p.get('topics')))))
    p['domain'] = list(
        map(lambda fos: {"domain": fos},
            set(filter(lambda fos: fos is not None,
                       map(lambda topic: map_fos_topic_to_domain(topic.get('topic').get('value')),
                           filter(lambda topic: topic.get('topic').get('scheme') == 'FOS', p.get('topics')))))))
    p['firstPublishDate'] = next(
        iter(
            sorted(
                map(lambda date: date.get('value'),
                    filter(lambda date: date.get('type') == 'publishing',
                           [date for m in (p.get('manifestations') or []) for date in (m.get('dates') or [])])))),
        None)
    return p


transform_entities = {
    # SKG-IF graph entities
    "datasource": trasform_graph_entity,
    "grants": trasform_graph_entity,
    "organizations": trasform_graph_entity,
    "persons": trasform_graph_entity,
    "products": trasform_product,
    "topics": trasform_graph_entity,
    "venues": trasform_graph_entity,
    # EOSC catalog entities
    "interoperability": trasform_interoperability,
    "services": trasform_catalog_entity,
    "training": trasform_catalog_entity,
}


def isEmpty(current_value: Dict[str, Any], labels: List[str]) -> bool:
    if len(labels) <= 0:
        return True
    for label in labels:
        if isinstance(current_value, list) and len(current_value) > 0:
            current_value = current_value[0]

        if isinstance(current_value, dict) and label in current_value:
            current_value = current_value[label]
        else:
            return True
    if current_value is None:
        return True
    if isinstance(current_value, list):
        if len(current_value) > 0:
            return current_value[0] == ""
        else:
            return True

    return str(current_value) == ""


#
# Filter products that do not meet inclusion policy
#
def filter_product(p: dict) -> bool:
    if isEmpty(p, ["titles", "none"]):
        return True

    if isEmpty(p, ["firstPublishDate"]):
        return True

    if p['product_type'] == "literature":
        if isEmpty(p, ["abstracts", "none"]):
            return True
        if isEmpty(p, ["contributions", "person", "local_identifier"]):
            return True
    elif p['product_type'] in ["research data", "other"]:
        if isEmpty(p, ["contributions", "person", "local_identifier"]):
            return True

    return False


filter_entities = {
    "products": filter_product
}