import os

from pyngrok.installer import get_ngrok_bin

__author__ = "Alex Laird"
__copyright__ = "Copyright 2023, Alex Laird"
__version__ = "6.1.0"

BIN_DIR = os.path.normpath(os.path.join(os.path.abspath(os.path.dirname(__file__)), "bin"))
DEFAULT_NGROK_PATH = os.path.join(BIN_DIR, get_ngrok_bin())
DEFAULT_CONFIG_PATH = None

DEFAULT_NGROK_CONFIG_PATH = os.path.join(os.path.expanduser("~"), ".ngrok2", "ngrok.yml")

_default_pyngrok_config = None


class PyngrokConfig:
    """
    An object containing ``pyngrok``'s configuration for interacting with the ``ngrok`` binary. All values are
    optional when it is instantiated, and default values will be used for parameters not passed.

    Use :func:`~pyngrok.conf.get_default` and :func:`~pyngrok.conf.set_default` to interact with the default
    ``pyngrok_config``, or pass another instance of this object as the ``pyngrok_config`` keyword arg to most
    methods in the :mod:`~pyngrok.ngrok` module to override the default.

    .. code-block:: python

        from pyngrok import conf, ngrok

        # Here we update the entire default config
        pyngrok_config = conf.PyngrokConfig(ngrok_path="/usr/local/bin/ngrok")
        conf.set_default(pyngrok_config)

        # Here we update just one variable in the default config
        conf.get_default().ngrok_path = "/usr/local/bin/ngrok"

        # Here we leave the default config as-is and pass an override
        pyngrok_config = conf.PyngrokConfig(ngrok_path="/usr/local/bin/ngrok")
        ngrok.connect(pyngrok_config=pyngrok_config)

    :var ngrok_path: The path to the ``ngrok`` binary, defaults to the value in
        `conf.DEFAULT_NGROK_PATH <index.html#config-file>`_
    :vartype ngrok_path: str
    :var config_path: The path to the ``ngrok`` config, defaults to ``None`` and ``ngrok`` manages it.
    :vartype config_path: str
    :var auth_token: A ``ngrok`` authtoken to pass to commands (overrides what is in the config).
    :vartype auth_token: str
    :var region: The region in which ``ngrok`` should start.
    :vartype region: str
    :var monitor_thread: Whether ``ngrok`` should continue to be monitored (for logs, etc.) after startup
        is complete.
    :vartype monitor_thread: bool
    :var log_event_callback: A callback that will be invoked each time ``ngrok`` emits a log. The function should take
        one argument of type :py:class:`str`. ``monitor_thread`` must be set to ``True`` or the function will stop being called
        after ``ngrok`` finishes starting.
    :vartype log_event_callback: types.FunctionType
    :var startup_timeout: The max number of seconds to wait for ``ngrok`` to start before timing out.
    :vartype startup_timeout: int
    :var max_logs: The max number of logs to store in :class:`~pyngrok.process.NgrokProcess`'s ``logs`` variable.
    :vartype max_logs: int
    :var request_timeout: The max timeout when making requests to ``ngrok``'s API.
    :vartype request_timeout: float
    :var start_new_session: Passed to :py:class:`subprocess.Popen` when launching ``ngrok``. (Python 3 and POSIX only)
    :vartype start_new_session: bool
    :var ngrok_version: The major version of ``ngrok`` installed.
    :vartype ngrok_version: str
    :var api_key: A ``ngrok`` API key.
    :vartype api_key: str
    """

    def __init__(self,
                 ngrok_path=None,
                 config_path=None,
                 auth_token=None,
                 region=None,
                 monitor_thread=True,
                 log_event_callback=None,
                 startup_timeout=15,
                 max_logs=100,
                 request_timeout=4,
                 start_new_session=False,
                 ngrok_version="v3",
                 api_key=None):
        self.ngrok_path = DEFAULT_NGROK_PATH if ngrok_path is None else ngrok_path
        self.config_path = DEFAULT_CONFIG_PATH if config_path is None else config_path
        self.auth_token = auth_token
        self.region = region
        self.monitor_thread = monitor_thread
        self.log_event_callback = log_event_callback
        self.startup_timeout = startup_timeout
        self.max_logs = max_logs
        self.request_timeout = request_timeout
        self.start_new_session = start_new_session
        self.ngrok_version = ngrok_version
        self.api_key = api_key


def get_default():
    """
    Get the default config to be used with methods in the :mod:`~pyngrok.ngrok` module. To override the
    default individually, the ``pyngrok_config`` keyword arg can also be passed to most of these methods,
    or set a new default config with :func:`~pyngrok.conf.set_default`.

    :return: The default ``pyngrok_config``.
    :rtype: PyngrokConfig
    """
    if _default_pyngrok_config is None:
        set_default(PyngrokConfig())

    return _default_pyngrok_config


def set_default(pyngrok_config):
    """
    Set a new default config to be used with methods in the :mod:`~pyngrok.ngrok` module. To override the
    default individually, the ``pyngrok_config`` keyword arg can also be passed to most of these methods.

    :param pyngrok_config: The new ``pyngrok_config`` to be used by default.
    :type pyngrok_config: PyngrokConfig
    """
    global _default_pyngrok_config

    _default_pyngrok_config = pyngrok_config
