# SPDX-License-Identifier: GPL-2.0-only
#
# This file is part of Nominatim. (https://nominatim.org)
#
# Copyright (C) 2022 by the Nominatim developer community.
# For a full list of authors see the git log.
import itertools
import sys
from pathlib import Path

import psycopg2
import pytest

# always test against the source
SRC_DIR = (Path(__file__) / '..' / '..' / '..').resolve()
sys.path.insert(0, str(SRC_DIR))

from nominatim.config import Configuration
from nominatim.db import connection
from nominatim.db.sql_preprocessor import SQLPreprocessor
import nominatim.tokenizer.factory

import dummy_tokenizer
import mocks
from cursor import CursorForTesting


@pytest.fixture
def src_dir():
    return SRC_DIR


@pytest.fixture
def temp_db(monkeypatch):
    """ Create an empty database for the test. The database name is also
        exported into NOMINATIM_DATABASE_DSN.
    """
    name = 'test_nominatim_python_unittest'
    conn = psycopg2.connect(database='postgres')

    conn.set_isolation_level(0)
    with conn.cursor() as cur:
        cur.execute('DROP DATABASE IF EXISTS {}'.format(name))
        cur.execute('CREATE DATABASE {}'.format(name))

    conn.close()

    monkeypatch.setenv('NOMINATIM_DATABASE_DSN', 'dbname=' + name)

    yield name

    conn = psycopg2.connect(database='postgres')

    conn.set_isolation_level(0)
    with conn.cursor() as cur:
        cur.execute('DROP DATABASE IF EXISTS {}'.format(name))

    conn.close()


@pytest.fixture
def dsn(temp_db):
    return 'dbname=' + temp_db


@pytest.fixture
def temp_db_with_extensions(temp_db):
    conn = psycopg2.connect(database=temp_db)
    with conn.cursor() as cur:
        cur.execute('CREATE EXTENSION hstore; CREATE EXTENSION postgis;')
    conn.commit()
    conn.close()

    return temp_db

@pytest.fixture
def temp_db_conn(temp_db):
    """ Connection to the test database.
    """
    with connection.connect('dbname=' + temp_db) as conn:
        yield conn


@pytest.fixture
def temp_db_cursor(temp_db):
    """ Connection and cursor towards the test database. The connection will
        be in auto-commit mode.
    """
    conn = psycopg2.connect('dbname=' + temp_db)
    conn.set_isolation_level(0)
    with conn.cursor(cursor_factory=CursorForTesting) as cur:
        yield cur
    conn.close()


@pytest.fixture
def table_factory(temp_db_cursor):
    """ A fixture that creates new SQL tables, potentially filled with
        content.
    """
    def mk_table(name, definition='id INT', content=None):
        temp_db_cursor.execute('CREATE TABLE {} ({})'.format(name, definition))
        if content is not None:
            temp_db_cursor.execute_values("INSERT INTO {} VALUES %s".format(name), content)

    return mk_table


@pytest.fixture
def def_config():
    cfg = Configuration(None)
    cfg.set_libdirs(module='.', osm2pgsql='.')
    return cfg


@pytest.fixture
def project_env(tmp_path):
    projdir = tmp_path / 'project'
    projdir.mkdir()
    cfg = Configuration(projdir)
    cfg.set_libdirs(module='.', osm2pgsql='.')
    return cfg


@pytest.fixture
def property_table(table_factory, temp_db_conn):
    table_factory('nominatim_properties', 'property TEXT, value TEXT')

    return mocks.MockPropertyTable(temp_db_conn)


@pytest.fixture
def status_table(table_factory):
    """ Create an empty version of the status table and
        the status logging table.
    """
    table_factory('import_status',
                  """lastimportdate timestamp with time zone NOT NULL,
                     sequence_id integer,
                     indexed boolean""")
    table_factory('import_osmosis_log',
                  """batchend timestamp,
                     batchseq integer,
                     batchsize bigint,
                     starttime timestamp,
                     endtime timestamp,
                     event text""")


@pytest.fixture
def place_table(temp_db_with_extensions, table_factory):
    """ Create an empty version of the place table.
    """
    table_factory('place',
                  """osm_id int8 NOT NULL,
                     osm_type char(1) NOT NULL,
                     class text NOT NULL,
                     type text NOT NULL,
                     name hstore,
                     admin_level smallint,
                     address hstore,
                     extratags hstore,
                     geometry Geometry(Geometry,4326) NOT NULL""")


@pytest.fixture
def place_row(place_table, temp_db_cursor):
    """ A factory for rows in the place table. The table is created as a
        prerequisite to the fixture.
    """
    psycopg2.extras.register_hstore(temp_db_cursor)
    idseq = itertools.count(1001)
    def _insert(osm_type='N', osm_id=None, cls='amenity', typ='cafe', names=None,
                admin_level=None, address=None, extratags=None, geom=None):
        temp_db_cursor.execute("INSERT INTO place VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s)",
                               (osm_id or next(idseq), osm_type, cls, typ, names,
                                admin_level, address, extratags,
                                geom or 'SRID=4326;POINT(0 0)'))

    return _insert

@pytest.fixture
def placex_table(temp_db_with_extensions, temp_db_conn):
    """ Create an empty version of the place table.
    """
    return mocks.MockPlacexTable(temp_db_conn)


@pytest.fixture
def osmline_table(temp_db_with_extensions, table_factory):
    table_factory('location_property_osmline',
                  """place_id BIGINT,
                     osm_id BIGINT,
                     parent_place_id BIGINT,
                     geometry_sector INTEGER,
                     indexed_date TIMESTAMP,
                     startnumber INTEGER,
                     endnumber INTEGER,
                     partition SMALLINT,
                     indexed_status SMALLINT,
                     linegeo GEOMETRY,
                     interpolationtype TEXT,
                     address HSTORE,
                     postcode TEXT,
                     country_code VARCHAR(2)""")


@pytest.fixture
def sql_preprocessor_cfg(tmp_path, table_factory, temp_db_with_extensions):
    table_factory('country_name', 'partition INT', ((0, ), (1, ), (2, )))
    cfg = Configuration(None)
    cfg.set_libdirs(module='.', osm2pgsql='.', sql=tmp_path)
    return cfg


@pytest.fixture
def sql_preprocessor(sql_preprocessor_cfg, temp_db_conn):
    return SQLPreprocessor(temp_db_conn, sql_preprocessor_cfg)


@pytest.fixture
def tokenizer_mock(monkeypatch, property_table):
    """ Sets up the configuration so that the test dummy tokenizer will be
        loaded when the tokenizer factory is used. Also returns a factory
        with which a new dummy tokenizer may be created.
    """
    monkeypatch.setenv('NOMINATIM_TOKENIZER', 'dummy')

    def _import_dummy(*args, **kwargs):
        return dummy_tokenizer

    monkeypatch.setattr(nominatim.tokenizer.factory, "_import_tokenizer", _import_dummy)
    property_table.set('tokenizer', 'dummy')

    def _create_tokenizer():
        return dummy_tokenizer.DummyTokenizer(None, None)

    return _create_tokenizer
