import logging
from pathlib import Path
from typing import List

import arklog
import sys
from signal import SIGINT, SIGTERM, signal
import dacite
import toml

from graph_exploring_tool import __version__
from graph_exploring_tool.configuration import Configuration
from graph_exploring_tool.graphical.interface import interface
from graph_exploring_tool.query import QueryTemplate


def handler(signal_code, _) -> None:
    """Signal handler."""
    logging.debug(f"Shutting down because signal {signal_code} was received.")
    sys.exit(5)


def load_palette(palette_directory: Path) -> List:
    """"""
    for query_path in palette_directory.rglob("*.toml"):
        logging.debug(f"Loading palette query '{query_path}'.")
        query_configuration = toml.loads(query_path.read_text(encoding="utf-8"))
        yield dacite.from_dict(data_class=QueryTemplate, data=query_configuration)


def launch():
    """"""
    signal(SIGINT, handler)
    signal(SIGTERM, handler)
    arklog.set_config_logging()
    logging.info(f"Graph Exploring Tool {__version__}.")
    data_dir = Path(__file__).resolve().parent.parent / Path("data")

    logging.debug(f"Looking for configuration in '{data_dir}'.")
    try:
        configuration = toml.loads((data_dir / Path("configuration.toml")).read_text(encoding="utf-8"))
        configuration = dacite.from_dict(data_class=Configuration, data=configuration, )
    except FileNotFoundError as e:
        logging.error(f"Configuration not found. {e}")
        return 8

    logging.debug("Configuration:")
    logging.debug(f"  -> {configuration.example_prefix=}")
    logging.debug(f"  -> {configuration.example_query=}")
    logging.debug(f"  -> {configuration.endpoint_sparql=}")
    logging.debug(f"  -> {configuration.prefixes=}")

    prefix_duplicates = configuration.check_for_duplicate_prefixes()
    for duplicate in prefix_duplicates:
        logging.warning(f"Duplicate prefix '{duplicate}'.")

    palette = load_palette(data_dir / Path("palette"))
    return interface(configuration=configuration, palette=palette)


if __name__ == "__main__":
    launch()