#!/usr/bin/env bash
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

cd "$ROOT"

if [[ -f ".env" ]]; then
  set -a
  # shellcheck disable=SC1091
  source ./.env
  set +a
fi

pick_python() {
  if [[ -n "${VISUAL_CHAT_PYTHON:-}" && -x "${VISUAL_CHAT_PYTHON}" ]]; then
    echo "$VISUAL_CHAT_PYTHON"
    return 0
  fi
  if [[ -n "${VIRTUAL_ENV:-}" && -x "${VIRTUAL_ENV}/bin/python" ]]; then
    echo "${VIRTUAL_ENV}/bin/python"
    return 0
  fi
  if [[ -x "$ROOT/.venv/bin/python" ]]; then
    echo "$ROOT/.venv/bin/python"
    return 0
  fi
  if command -v python3 >/dev/null 2>&1; then
    command -v python3
    return 0
  fi
  command -v python
}

normalize_host() {
  local host="${1:-0.0.0.0}"
  case "$host" in
    127.0.0.1|localhost|::1)
      echo "0.0.0.0"
      ;;
    *)
      echo "$host"
      ;;
  esac
}

HOST="$(normalize_host "${HTTP_HOST:-0.0.0.0}")"
PORT="${HTTP_PORT:-8080}"
PY="$(pick_python)"
SCHEME="http"
ARGS=(main:app --host "$HOST" --port "$PORT")

if [[ -n "${SSL_CERTFILE:-}" && -n "${SSL_KEYFILE:-}" ]]; then
  SCHEME="https"
  ARGS+=(--ssl-certfile "$SSL_CERTFILE" --ssl-keyfile "$SSL_KEYFILE")
fi

echo "repo: $ROOT"
echo "python: $PY"
echo "bind: ${HOST}:${PORT}"
echo "listen: ${SCHEME}://${HOST}:${PORT}"
echo "browser test page: ${SCHEME}://<server-ip>:${PORT}/"
echo "note: only one browser page is allowed to own the session; a newer client replaces the older one."
echo "note: after browser refresh, one click may still be required to resume mic/audio due to browser media policy."

exec "$PY" -m uvicorn "${ARGS[@]}"