#!/usr/bin/env python
from fetch import wikidata
from neo4j import GraphDatabase


NEO4J_URI = "bolt://localhost:7687"
NEO4J_USR = "neo4j"
NEO4J_PSW = "test"

# Conection with Neo4j
driver = GraphDatabase.driver(NEO4J_URI, auth=(NEO4J_USR, NEO4J_PSW))



def define_link_from_type(link_id):
    """
    Define typy of link from ID

    :param link_id: id of link
    :return: type corresponding
    """
    if link_id in ["P780","P1542"]:
        return "Sign_symsymptoms"
    elif link_id == "P5642":
        return "Risk_factor"
    else:
        raise Exception("Error : unknow link id: " + link_id)



# Create indexes
with driver.session() as session:
        session.run("CREATE INDEX ON :Disease(id);")
        session.run("CREATE INDEX ON :Sign_symsymptoms(id);")
        session.run("CREATE INDEX ON :Risk_factor(id);")

# Get all diseases, links, symptoms
request_disease_links = (wikidata.request("""
    SELECT ?maladie ?maladieLabel ?link ?linkLabel ?signe_symptome ?signe_symptomeLabel
    WHERE {
    ?maladie ?link ?signe_symptome.
    SERVICE wikibase:label { bd:serviceParam wikibase:language "fr"}.
    VALUES ?link {wdt:P780 wdt:p1542 wdt:P5642}
    }
    ORDER BY ?maladie
"""
))['results']['bindings']

for link in request_disease_links:
    disease_id = link["maladie"]["value"].split("/")[-1]
    disease_label = link["maladieLabel"]["value"].lower()
    disease_type = "Disease"

    link_id = link["link"]["value"].split("/")[-1]
    link_label = link["linkLabel"]["value"].lower()
    link_type = "link_"+define_link_from_type(link_id)

    signe_symptome_id = link["signe_symptome"]["value"].split("/")[-1]
    signe_symptome_label = link["signe_symptomeLabel"]["value"].split("/")[-1].lower()
    signe_symptome_type = define_link_from_type(link_id)

    with driver.session() as session:
        # add dieadiseases
        session.run(
            "MERGE (d:" + disease_type + " {id:$disease_id, label:$disease_label})",
            disease_id=disease_id,
            disease_label=disease_label,
        )

        # add symptoms
        session.run(
            "MERGE (s:" + signe_symptome_type + " {id:$signe_symptome_id, label:$signe_symptome_label})",
            signe_symptome_id=signe_symptome_id,
            signe_symptome_label=signe_symptome_label,
        )

        # add link
        session.run(
            "MATCH (d:" + disease_type + " {id:$disease_id})"
            "MATCH (s:" + signe_symptome_type + " {id:$signe_symptome_id})"
            "MERGE (d)-[l:" + link_type + " {id:$link_id, label:$link_label}]->(s)",
            link_id=link_id,
            link_label=link_label,
            disease_id=disease_id,
            signe_symptome_id=signe_symptome_id
        )

# Close Neo4j connection
driver.close()