import os
from pathlib import Path

BASE_DIR = Path(__file__).resolve().parent
INSTANCE_DIR = Path(os.environ.get("INSTANCE_DIR", BASE_DIR / "instance"))
UPLOADS_DIR = INSTANCE_DIR / "uploads"
DB_PATH = INSTANCE_DIR / "boarding_pass.db"

PORT = int(os.environ.get("PORT", "8080"))
MAX_UPLOAD_MB = int(os.environ.get("MAX_UPLOAD_MB", "15"))

PUBLIC_BASE_URL = os.environ.get("PUBLIC_BASE_URL", "").rstrip("/")
AIRTRAIL_BASE_URL = os.environ.get("AIRTRAIL_BASE_URL", "").rstrip("/")
AIRTRAIL_API_KEY = os.environ.get("AIRTRAIL_API_KEY", "")

FLIGHTAWARE_USER_AGENT = (
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
    "(KHTML, like Gecko) Chrome/124.0 Safari/537.36"
)

MAX_TRACK_POINTS = 2000
MAX_FETCH_ATTEMPTS = 5


def ensure_dirs() -> None:
    INSTANCE_DIR.mkdir(parents=True, exist_ok=True)
    UPLOADS_DIR.mkdir(parents=True, exist_ok=True)