import requests
import logging
import argparse
import sqlite3
import csv
import urllib.parse

class LocationStore:
    def __init__(self, db_filename):
        self.conn = sqlite3.connect(db_filename)

        # make sure the table exits.
        createSqls = ["""
        CREATE TABLE IF NOT EXISTS `people` (
            `name`    VARCHAR(255),
            `city_id`    INTEGER,
            `city_name`    VARCHAR(255),
            `latitude` VARCHAR(255),
            `longitude`    VARCHAR(255),
	           `wd_person_id`	VARCHAR ( 20 ) UNIQUE
        );
        """,
        """
        CREATE UNIQUE INDEX IF NOT EXISTS `unique_name` ON `people` (
            `name`
        );
        """]
        cur = self.conn.cursor()
        for sql in createSqls:
            cur.execute(sql)
        self.conn.commit()
    #
    # def __enter__(self):
    #     self.c = self.conn.cursor()
    #     return self
    #
    # def __exit__(self, type, value, traceback):
    #     self.c.close()

    def addVariable(self, name, wd_id, city_name, city_id, latitude, longitude):
        c = self.conn.cursor()
        logger.info(f"Queing storing of {name} ({wd_id}) in {city_name} ({city_id}) on {latitude}/{longitude}")
        if wd_id == -1 or wd_id == '-1':
            wd_id = None
        c.execute("INSERT OR REPLACE INTO people (name, wd_person_id, city_name, city_id, latitude, longitude) VALUES (?,?,?,?, ?, ?)", (name, wd_id, city_name, city_id, latitude, longitude))
        self.conn.commit()
        c.close()

    def contains(self, name):
        cur = self.conn.cursor()
        cur.execute(f"SELECT name FROM people WHERE name = ?", (name,))
        values = [v[0] for v in cur.fetchall()]
        cur.close()
        if len(values):
            return True
        return False

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger('cities')

argParser = argparse.ArgumentParser(description='Get coordinates for the birth places of the LFW people')
argParser.add_argument(
        '--db',
        type=str,
        required=True,
        help=''
    )
argParser.add_argument(
        '--csv',
        type=str,
        required=True,
        help=''
    )
# argParser.add_argument(
#         '--limit',
#         type=int,
#         default=1000,
#         help='Limit of new messages to parse'
    # )
argParser.add_argument(
        '--verbose',
        '-v',
        action='store_true',
        help='Debug logging'
    )
args = argParser.parse_args()

if args.verbose:
    logger.setLevel(logging.DEBUG)

#  problem how to search by title?
# query = """
# SELECT ?city ?geoloc   where {
# #   wd:Q47526 wdt:P27 ?geoloc .
#   wd:Q47526 wdt:P19 ?city .
#   ?city wdt:P17 ?country .
#   ?city wdt:P625 ?geoloc .
#   SERVICE wikibase:label {
#        bd:serviceParam wikibase:language "en" .
#     }
# }
# """

with open(args.csv, 'r') as fp:
    reader = csv.reader(fp, delimiter='\t')
    names = [r[0] for r in reader]

storage = LocationStore(args.db)


for name in names:
    logger.debug(f"Name: {name}")
    if storage.contains(name):
        logger.info(f"Skip {name} - exists already")
        continue

    urlName = urllib.parse.quote(name)
    searchUrl = f"https://www.wikidata.org/w/api.php?action=wbgetentities&sites=enwiki&titles={urlName}&format=json"
    headers = {"Accept" : "application/json"}
    response = requests.get(searchUrl, headers=headers)
    data = response.json()
    for wdId in data['entities']:
        try:
            city_id = data['entities'][wdId]['claims']['P19'][0]['mainsnak']['datavalue']['value']['id']
        except Exception as e:
            logger.warn(f"No city found for '{name}'")
            logger.debug(data)
            storage.addVariable(name, wdId, '','','','')
            continue

        try:
            geolocUrl = f"https://www.wikidata.org/w/api.php?action=wbgetentities&ids={city_id}&format=json"
            r2 = requests.get(geolocUrl, headers=headers)
            d2 = r2.json()
            city_name = d2['entities'][city_id]['labels']['en']['value']
            latitude = d2['entities'][city_id]['claims']['P625'][0]['mainsnak']['datavalue']['value']['latitude']
            longitude = d2['entities'][city_id]['claims']['P625'][0]['mainsnak']['datavalue']['value']['longitude']
            storage.addVariable(name, wdId, city_name, city_id, latitude, longitude)
        except Exception as e:
            logger.warn(f"Error when doing followup query to {city_id} for {name}")
            logger.exception(e)
            storage.addVariable(name, wdId, '', city_id, '','')

        break