"""
Setup database connections
"""
import sqlite3
import mariadb
import psycopg2
import logging.config
from platformdirs import PlatformDirs
from pathlib import Path
import yaml


def get_database_cursors(log, config: str):
    dirs = PlatformDirs(config)
    database_config = Path(dirs.user_config_dir, 'database-config.yaml')
    with open(database_config, 'rt') as f:
        db_config = yaml.safe_load(f.read())
    sqlite_db = db_config["sqlite"]["file"]
    log.info('using SQLite3 database {}'.format(sqlite_db))
    sqlite_conn = sqlite3.connect(sqlite_db, detect_types=sqlite3.PARSE_DECLTYPES | sqlite3.PARSE_COLNAMES)
    mariadb_conn = mariadb.connect(
        host=db_config['mariadb']['host'],
        port=db_config['mariadb']['port'],
        user=db_config['mariadb']['user'],
        password=db_config['mariadb']['password'],
        database=db_config['mariadb']['database']
    )
    postgres_conn = psycopg2.connect(f"host={db_config['postgres']['host']} port={db_config['postgres']['port']} user={db_config['postgres']['user']} password={db_config['postgres']['password']} dbname={db_config['postgres']['database']}")
    return sqlite_conn, mariadb_conn, postgres_conn


def create_tables(sqlite_conn, logger, recreate_db, scripts):
    logger.info('create_tables')
    for table_id in scripts:
        create_statement = scripts[table_id]['create']
        drop_statement = scripts[table_id]['drop']
        logger.debug(create_statement)
        cursor = sqlite_conn.cursor()
        if recreate_db:
            logger.debug(drop_statement)
            cursor.execute(drop_statement)
        cursor.execute(create_statement)


def get_logger(level, config: str):
    dirs = PlatformDirs(config)
    logging_config = Path(dirs.user_config_dir, 'logging-config.yaml')
    with open(logging_config, 'rt') as f:
        log_config = yaml.safe_load(f.read())
    logging.config.dictConfig(log_config)
    logger = logging.getLogger('development')
    if level is not None:
        match level:
            case 0:
                logger.setLevel(logging.CRITICAL)
            case 1:
                logger.setLevel(logging.INFO)
            case 2:
                logger.setLevel(logging.DEBUG)
            case _:
                logger.setLevel(logging.INFO)
    return logger


def get_meta_data(mariadb_conn):
    mariadb_cursor = mariadb_conn.cursor()
    select_statement = "SELECT id, table_name FROM meta_data_table"
    mariadb_cursor.execute(select_statement)
    rows = mariadb_cursor.fetchall()
    meta_data = {}
    for (identifier, table_name) in rows:
        table_data = {"name": table_name}
        mariadb_cursor.execute("SELECT column_name, column_sync_name, column_type, column_modifier, column_order FROM meta_data_column WHERE table_id=?", (identifier, ))
        column_rows = mariadb_cursor.fetchall()
        column_list = []
        for (column_name, column_sync_name, column_type, column_modifier, column_order) in column_rows:
            column_data = {"column_name": column_name, "column_sync_name": column_sync_name, "column_type": column_type,
                           "column_modifier": column_modifier, "column_order": column_order}
            column_list.append(column_data)
        # logger.info(column_list)
        table_data["columns"] = column_list
        meta_data[identifier] = table_data
    return meta_data


def get_scripts(meta_data, logger):
    scripts_map = {}
    for table_id in meta_data:
        table_scripts = {}
        m_columns = []
        s_columns = []
        columns = []
        for column_data in meta_data[table_id]["columns"]:
            column_line = "{} {}".format(column_data["column_sync_name"], column_data["column_type"])
            if column_data["column_modifier"]:
                column_line += " " + column_data["column_modifier"]
            columns.append(column_line)
            m_columns.append(column_data['column_name'])
            s_columns.append(column_data['column_sync_name'])
        table_name = meta_data[table_id]["name"]
        create_statement = "CREATE TABLE IF NOT EXISTS {} ({});".format(table_name, ", ".join(columns))
        drop_statement = 'DROP TABLE IF EXISTS {}'.format(table_name)
        select_mariadb_statement = 'SELECT {} FROM {}'.format(', '.join(m_columns), table_name)
        select_sqlite_statement = 'SELECT {} FROM {}'.format(', '.join(s_columns), table_name)
        insert_sqlite_statement = 'INSERT INTO {}({}) VALUES({})'.format(table_name, ', '.join(s_columns), ', '.join(['?']*len(s_columns)))
        insert_mariadb_statement = 'INSERT INTO {}({}) VALUES({})'.format(table_name, ', '.join(m_columns), ', '.join(['?']*len(m_columns)))
        truncate_mariadb_statement = 'TRUNCATE {}'.format(table_name)
        #logger.debug(create_statement)
        #logger.debug(select_mariadb_statement)
        table_scripts["create"] = create_statement
        table_scripts["drop"] = drop_statement
        table_scripts["select_mariadb"] = select_mariadb_statement
        table_scripts["select_sqlite"] = select_sqlite_statement
        table_scripts["insert_sqlite"] = insert_sqlite_statement
        table_scripts["insert_mariadb"] = insert_mariadb_statement
        table_scripts["truncate_mariadb"] = truncate_mariadb_statement
        table_scripts["count"] = "SELECT COUNT(*) FROM {}".format(table_name)
        table_scripts["name"] = table_name
        scripts_map[table_id] = table_scripts
    return scripts_map