"""
Custom mocks for testing.
"""
import itertools

import psycopg2.extras

from nominatim.db import properties

class MockParamCapture:
    """ Mock that records the parameters with which a function was called
        as well as the number of calls.
    """
    def __init__(self, retval=0):
        self.called = 0
        self.return_value = retval
        self.last_args = None
        self.last_kwargs = None

    def __call__(self, *args, **kwargs):
        self.called += 1
        self.last_args = args
        self.last_kwargs = kwargs
        return self.return_value


class MockWordTable:
    """ A word table for testing.
    """
    def __init__(self, conn):
        self.conn = conn
        with conn.cursor() as cur:
            cur.execute("""CREATE TABLE word (word_id INTEGER,
                                              word_token text,
                                              word text,
                                              class text,
                                              type text,
                                              country_code varchar(2),
                                              search_name_count INTEGER,
                                              operator TEXT)""")

        conn.commit()

    def add_special(self, word_token, word, cls, typ, oper):
        with self.conn.cursor() as cur:
            cur.execute("""INSERT INTO word (word_token, word, class, type, operator)
                              VALUES (%s, %s, %s, %s, %s)
                        """, (word_token, word, cls, typ, oper))
        self.conn.commit()


    def add_postcode(self, word_token, postcode):
        with self.conn.cursor() as cur:
            cur.execute("""INSERT INTO word (word_token, word, class, type)
                              VALUES (%s, %s, 'place', 'postcode')
                        """, (word_token, postcode))
        self.conn.commit()


    def count(self):
        with self.conn.cursor() as cur:
            return cur.scalar("SELECT count(*) FROM word")


    def count_special(self):
        with self.conn.cursor() as cur:
            return cur.scalar("SELECT count(*) FROM word WHERE class != 'place'")


    def get_special(self):
        with self.conn.cursor() as cur:
            cur.execute("""SELECT word_token, word, class, type, operator
                           FROM word WHERE class != 'place'""")
            return set((tuple(row) for row in cur))


    def get_postcodes(self):
        with self.conn.cursor() as cur:
            cur.execute("""SELECT word FROM word
                           WHERE class = 'place' and type = 'postcode'""")
            return set((row[0] for row in cur))


class MockPlacexTable:
    """ A placex table for testing.
    """
    def __init__(self, conn):
        self.idseq = itertools.count(10000)
        self.conn = conn
        with conn.cursor() as cur:
            cur.execute("""CREATE TABLE placex (
                               place_id BIGINT,
                               parent_place_id BIGINT,
                               linked_place_id BIGINT,
                               importance FLOAT,
                               indexed_date TIMESTAMP,
                               geometry_sector INTEGER,
                               rank_address SMALLINT,
                               rank_search SMALLINT,
                               partition SMALLINT,
                               indexed_status SMALLINT,
                               osm_id int8,
                               osm_type char(1),
                               class text,
                               type text,
                               name hstore,
                               admin_level smallint,
                               address hstore,
                               extratags hstore,
                               geometry Geometry(Geometry,4326),
                               wikipedia TEXT,
                               country_code varchar(2),
                               housenumber TEXT,
                               postcode TEXT,
                               centroid GEOMETRY(Geometry, 4326))""")
            cur.execute("CREATE SEQUENCE IF NOT EXISTS seq_place")
        conn.commit()

    def add(self, osm_type='N', osm_id=None, cls='amenity', typ='cafe', names=None,
            admin_level=None, address=None, extratags=None, geom='POINT(10 4)',
            country=None):
        with self.conn.cursor() as cur:
            psycopg2.extras.register_hstore(cur)
            cur.execute("""INSERT INTO placex (place_id, osm_type, osm_id, class,
                                               type, name, admin_level, address,
                                               extratags, geometry, country_code)
                            VALUES(nextval('seq_place'), %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)""",
                        (osm_type, osm_id or next(self.idseq), cls, typ, names,
                         admin_level, address, extratags, 'SRID=4326;' + geom,
                         country))
        self.conn.commit()


class MockPropertyTable:
    """ A property table for testing.
    """
    def __init__(self, conn):
        self.conn = conn


    def set(self, name, value):
        """ Set a property in the table to the given value.
        """
        properties.set_property(self.conn, name, value)
