#!/usr/bin/env bash
# Fetch vless.conf from Happ/mireon subscription (JSON or plain vless:// lines).
# Env: VLESS_SUB_URL, VLESS_UA, VLESS_HWID (Happ → Settings / app id)
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
if [[ -f "${ROOT}/.env" ]]; then
  set -a
  # shellcheck disable=SC1091
  source "${ROOT}/.env"
  set +a
fi
SUB_URL="${VLESS_SUB_URL:?set VLESS_SUB_URL}"
OUT="${1:-${ROOT}/vless/vless.conf}"
UA="${VLESS_UA:-Happ/3.3.6/Windows/2607171516600}"
HWID="${VLESS_HWID:-}"

TMP="$(mktemp)"
trap 'rm -f "${TMP}"' EXIT

CURL=(curl -fsSL -A "$UA")
[[ -n "$HWID" ]] && CURL+=(-H "x-hwid: ${HWID}")

"${CURL[@]}" "$SUB_URL" | tr -d '\n\r' | base64 -d >"${TMP}" 2>/dev/null || "${CURL[@]}" "$SUB_URL" >"${TMP}"

pick="$(grep -E '^vless://' "${TMP}" | grep -v '@0\.0\.0\.0:1' | head -1 || true)"
if [[ -z "$pick" ]]; then
  pick="$(python3 "${SCRIPT_DIR}/vless-from-subscription-json.py" "${TMP}")" || true
fi

if [[ -z "$pick" ]]; then
  echo "fetch-vless-subscription: no valid vless URI" >&2
  head -c 400 "${TMP}" >&2
  exit 1
fi

mkdir -p "$(dirname "$OUT")"
printf '%s\n' "$pick" >"$OUT"
chmod 600 "$OUT"
echo "Wrote $(wc -c <"$OUT") bytes -> $OUT"