import json
import logging
import os
import signal
import socket
import sys

logger = logging.getLogger(__name__)

CONFIG_PATH = "config/config.json"
PID_PATH = "data/ircbot.pid"
SOCK_PATH = "data/ircbot.sock"


def load_config() -> dict:
    if not os.path.exists(CONFIG_PATH):
        return {}
    with open(CONFIG_PATH, "r") as f:
        return json.load(f)


def save_config(cfg: dict) -> None:
    os.makedirs("config", exist_ok=True)
    with open(CONFIG_PATH, "w") as f:
        json.dump(cfg, f, indent=2)
    logger.info("[CONFIG] Saved config.json")


def signal_bot_reload() -> bool:
    """Signal bot to reload config. Returns True on success."""
    # Try Unix socket first (Docker mode)
    if sys.platform != "win32" and os.path.exists(SOCK_PATH):
        try:
            s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
            s.connect(SOCK_PATH)
            s.sendall(b"RELOAD")
            s.close()
            logger.info("[CONFIG] Sent RELOAD via Unix socket")
            return True
        except Exception as e:
            logger.warning(f"[CONFIG] Socket reload failed: {e}")

    # Fall back to SIGHUP
    if sys.platform != "win32" and os.path.exists(PID_PATH):
        try:
            with open(PID_PATH) as f:
                pid = int(f.read().strip())
            os.kill(pid, signal.SIGHUP)
            logger.info(f"[CONFIG] Sent SIGHUP to PID {pid}")
            return True
        except Exception as e:
            logger.warning(f"[CONFIG] SIGHUP failed: {e}")

    logger.warning("[CONFIG] Could not signal bot (no socket or PID available)")
    return False


def signal_bot_reconnect() -> bool:
    if sys.platform != "win32" and os.path.exists(SOCK_PATH):
        try:
            s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
            s.connect(SOCK_PATH)
            s.sendall(b"RECONNECT")
            s.close()
            return True
        except Exception as e:
            logger.warning(f"[CONFIG] Reconnect signal failed: {e}")
    return False