#!/usr/bin/env python3
"""Collector constants and filesystem paths."""
import os
from pathlib import Path

N = 4
POLL_PERIOD_S = 30
STALE_PERIODS = 3  # k: silence for k*period → stale; another k → lost
TICK_INTERVAL_S = 5.0
ADV_INTERVAL_MS_MIN = 100
ADV_INTERVAL_MS_MAX = 300
ADV_DEBOUNCE_S = 1.0
UI_LOG_LIMIT = 200

SERVICE_UUID = "0000a000-0000-1000-8000-00805f9b34fb"
CHAR_REPORT_UUID = "0000a001-0000-1000-8000-00805f9b34fb"
CHAR_SLOT_UUID = "0000a011-0000-1000-8000-00805f9b34fb"

# 16-bit forms for advertising
SERVICE_UUID_16 = 0xA000
COMPANY_ID = 0xFFFF  # placeholder manufacturer id
ADV_VERSION = 1

LOCAL_NAME = "BTCollector"


def install_root() -> Path:
    env = os.environ.get("BUTTONTASK_ROOT")
    if env:
        return Path(env)
    return Path("/opt/buttontask")


def config_dir() -> Path:
    p = install_root() / "config"
    p.mkdir(parents=True, exist_ok=True)
    return p


def run_dir() -> Path:
    p = install_root() / "run"
    p.mkdir(parents=True, exist_ok=True)
    return p


def registry_path() -> Path:
    return config_dir() / "sensors-registry.json"


def status_path() -> Path:
    return run_dir() / "sensors-status.json"


def ui_log_path() -> Path:
    return run_dir() / "sensors-ui.log"


def cmd_path() -> Path:
    return run_dir() / "sensors-cmd"


def collector_log_path() -> Path:
    return run_dir() / "collector.log"