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", "")

# RapidAPI AeroDataBox key - same provider/plan AirTrail's own "Search"
# button uses internally to fill in schedule/actual gate times. Optional:
# if unset, gate scheduled/actual times are simply left for AirTrail's own
# manual Search to fill in, same as today.
AERODATABOX_API_KEY = os.environ.get("AERODATABOX_API_KEY", "")

# Shared browser UA for every outbound scrape/API call this pipeline makes.
# Both FlightAware and (as of the AeroDataBox 403 debugging session) the
# AeroDataBox/RapidAPI gateway sit behind Cloudflare and reject requests
# carrying Python urllib's default User-Agent - confirmed live: the exact
# same request/key/URL got HTTP 403 with no UA and HTTP 200 with this one.
BROWSER_USER_AGENT = (
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
    "(KHTML, like Gecko) Chrome/124.0 Safari/537.36"
)
FLIGHTAWARE_USER_AGENT = BROWSER_USER_AGENT  # kept for anything still importing the old name

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)