"""Application entry logic — invoked by both `python -m app` and the bundled .exe.

Lives as a regular module (not __main__.py) so it can be imported with absolute
imports from a top-level entry script — PyInstaller doesn't preserve package
context for the entry script.
"""

from __future__ import annotations

import logging
import sys

from app.config import Config
from app import paths as app_paths
from app.ui import App


def _setup_logging() -> None:
    try:
        handler: logging.Handler = logging.FileHandler(
            app_paths.log_file_path(), encoding="utf-8"
        )
    except Exception:
        handler = logging.StreamHandler(sys.stderr)

    logging.basicConfig(
        level=logging.INFO,
        format="%(asctime)s %(levelname)s %(name)s: %(message)s",
        handlers=[handler],
    )


def main() -> int:
    _setup_logging()
    log = logging.getLogger(__name__)

    try:
        cfg = Config.load()
    except FileNotFoundError as e:
        log.error("Config not found: %s", e)
        print("config.json not found. Put one next to the .exe.", file=sys.stderr)
        return 2
    except Exception as e:
        log.exception("Config load failed")
        print(f"Failed to load config.json: {e}", file=sys.stderr)
        return 2

    log.info("Starting app — csv=%s", cfg.resolved_csv_path)
    app = App(cfg)
    app.mainloop()
    return 0