"""Configuration: share.config loading, constants, CLI args."""

import argparse
import configparser
from pathlib import Path

BASE_DIR = Path(__file__).resolve().parent

_cp = configparser.ConfigParser()
_cp.read_dict({
    "server": {
        "port": "3001", "dir": str(Path.home() / "Downloads" / "shared"),
        "ttl": "7", "san": "", "lang": "ru", "refresh": "5",
        "per_page": "10,25,50,100",
    },
    "internal": {
        "secs_per_day": "86400", "cleanup_interval": "3600",
        "ssl_handshake_timeout": "5", "sniff_size": "8192",
        "chunk_size": "65536", "cert_days": "3650", "cert_key_bits": "2048",
        "toast_ms": "2500", "progress_hide_ms": "1200",
    },
})
_cp.read(BASE_DIR / "share.config")

SECS_PER_DAY = _cp.getint("internal", "secs_per_day")
CLEANUP_INTERVAL = _cp.getint("internal", "cleanup_interval")
SSL_HANDSHAKE_TIMEOUT = _cp.getint("internal", "ssl_handshake_timeout")
SNIFF_SIZE = _cp.getint("internal", "sniff_size")
CHUNK_SIZE = _cp.getint("internal", "chunk_size")
CERT_DAYS = _cp.getint("internal", "cert_days")
CERT_KEY_BITS = _cp.getint("internal", "cert_key_bits")


def load_config() -> dict:
    """Load config: share.config defaults <- CLI args."""
    conf = dict(_cp["server"])

    p = argparse.ArgumentParser(description="Share — local file sharing server")
    p.add_argument("-p", "--port", type=int)
    p.add_argument("-d", "--dir")
    p.add_argument("--ttl", type=int)
    p.add_argument("--san", nargs="*")
    p.add_argument("--lang")
    p.add_argument("--refresh", type=int)
    args = p.parse_args()

    for key, val in vars(args).items():
        if val is not None:
            conf[key] = " ".join(val) if isinstance(val, list) else str(val)

    return conf


def client_cfg(conf: dict) -> dict:
    """Build config dict to inject into HTML as CFG."""
    return {
        "lang": conf["lang"],
        "refresh": int(conf["refresh"]),
        "perPage": [int(x) for x in conf["per_page"].split(",")],
        "toastMs": _cp.getint("internal", "toast_ms"),
        "progressHideMs": _cp.getint("internal", "progress_hide_ms"),
    }