# ---------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# ---------------------------------------------------------

# pylint: disable=protected-access

"""Defines functionality for collecting telemetry about code.

An activity is a logical block of code that consumers want to monitor.
To monitor an activity, either wrap the logical block of code with the
``log_activity()`` method or use the ``@monitor_with_activity``
decorator.
"""
import contextlib
import functools
import inspect
import logging
import os
import uuid
from datetime import datetime
from uuid import uuid4

from marshmallow import ValidationError

from azure.ai.ml.exceptions import ErrorCategory, MlException
from azure.core.exceptions import HttpResponseError

from .._utils.utils import _is_user_error_from_exception_type, _is_user_error_from_status_code, _str_to_bool

# Get environment variable IS_IN_CI_PIPELINE to decide whether it's in CI test
IS_IN_CI_PIPELINE = _str_to_bool(os.environ.get("IS_IN_CI_PIPELINE", "False"))


class ActivityType(object):
    """The type of activity (code) monitored.

    The default type is "PublicAPI".
    """

    PUBLICAPI = "PublicApi"  # incoming public API call (default)
    INTERNALCALL = "InternalCall"  # internal (function) call
    CLIENTPROXY = "ClientProxy"  # an outgoing service API call


class ActivityCompletionStatus(object):
    """The activity (code) completion status, success, or failure."""

    SUCCESS = "Success"
    FAILURE = "Failure"


class ActivityLoggerAdapter(logging.LoggerAdapter):
    """An adapter for loggers to keep activity contextual information in
    logging output.

    :param logger: The activity logger adapter.
    :type logger: logging.LoggerAdapter
    :param activity_info: The info to write to the logger.
    :type activity_info: str
    """

    def __init__(self, logger, activity_info):
        """Initialize a new instance of the class.

        :param logger: The activity logger.
        :type logger: logger
        :param activity_info: The info to write to the logger.
        :type activity_info: str
        """
        self._activity_info = activity_info
        super(ActivityLoggerAdapter, self).__init__(logger, None)

    @property
    def activity_info(self):
        """Return current activity info."""
        return self._activity_info

    def process(self, msg, kwargs):
        """Process the log message.

        :param msg: The log message.
        :type msg: str
        :param kwargs: The arguments with properties.
        :type kwargs: dict
        """
        if "extra" not in kwargs:
            kwargs["extra"] = {}

        if "properties" not in kwargs["extra"]:
            kwargs["extra"]["properties"] = {}

        kwargs["extra"]["properties"].update(self._activity_info)

        return msg, kwargs


def error_preprocess(activityLogger, exception):
    """Try to update activityLogger if exception is HttpResponseError or
    builtin error (such as KeyError, TypeError)

    For HttpResponseError, will log exception message and classify error category according to http response status
    code if have, otherwise classify as Unknown. For builtin error,  will log exception message and classify error
    category as Unknown.

    :param activityLogger: The logger adapter.
    :type activityLogger: ActivityLoggerAdapter
    :param exception: The raised exception to be preprocessed.
    :type exception: BaseException
    """

    if isinstance(exception, HttpResponseError):
        activityLogger.activity_info["errorMessage"] = exception.message
        if exception.response:
            http_status_code = exception.response.status_code
            error_category = (
                ErrorCategory.USER_ERROR
                if _is_user_error_from_status_code(http_status_code)
                else ErrorCategory.SYSTEM_ERROR
            )
        else:
            error_category = ErrorCategory.UNKNOWN
        activityLogger.activity_info["errorCategory"] = error_category
        if exception.inner_exception:
            activityLogger.activity_info["innerException"] = type(exception.inner_exception).__name__
    elif isinstance(exception, MlException):
        # If exception is MLException, it will have error_category, message and target attributes and will log those
        # information in log_activity, no need more actions here.
        pass
    elif isinstance(exception, ValidationError):
        # Validation error should be user error
        activityLogger.activity_info["errorMessage"] = str(exception)
        activityLogger.activity_info["errorCategory"] = ErrorCategory.USER_ERROR
    else:
        activityLogger.activity_info["errorMessage"] = "Got error {0}: '{1}' while calling {2}".format(
            exception.__class__.__name__,
            exception,
            activityLogger.activity_info["activity_name"],
        )
        if _is_user_error_from_exception_type(exception) or _is_user_error_from_exception_type(exception.__cause__):
            activityLogger.activity_info["errorCategory"] = ErrorCategory.USER_ERROR
        else:
            # Todo: should check KeyError, TypeError, ValueError caused by user before request or raise in code directly
            activityLogger.activity_info["errorCategory"] = ErrorCategory.UNKNOWN
    return exception


@contextlib.contextmanager
def log_activity(
    logger,
    activity_name,
    activity_type=ActivityType.INTERNALCALL,
    custom_dimensions=None,
):
    """Log an activity.

    An activity is a logical block of code that consumers want to monitor.
    To monitor, wrap the logical block of code with the ``log_activity()`` method. As an alternative, you can
    also use the ``@monitor_with_activity`` decorator.

    :param logger: The logger adapter.
    :type logger: logging.LoggerAdapter
    :param activity_name: The name of the activity. The name should be unique per the wrapped logical code block.
    :type activity_name: str
    :param activity_type: One of PUBLICAPI, INTERNALCALL, or CLIENTPROXY which represent an incoming API call,
        an internal (function) call, or an outgoing API call. If not specified, INTERNALCALL is used.
    :type activity_type: str
    :param custom_dimensions: The custom properties of the activity.
    :type custom_dimensions: dict
    """
    activity_info = dict(
        activity_id=str(uuid.uuid4()),
        activity_name=activity_name,
        activity_type=activity_type,
    )
    custom_dimensions = custom_dimensions or {}
    custom_dimensions.update({"client_request_id": str(uuid4())})
    activity_info.update(custom_dimensions)

    start_time = datetime.utcnow()
    completion_status = ActivityCompletionStatus.SUCCESS

    message = "ActivityStarted, {}".format(activity_name)
    activityLogger = ActivityLoggerAdapter(logger, activity_info)
    activityLogger.info(message)
    exception = None

    try:
        yield activityLogger
    except BaseException as e: # pylint: disable=broad-except
        exception = error_preprocess(activityLogger, e)
        completion_status = ActivityCompletionStatus.FAILURE
        # All the system and unknown errors except for NotImplementedError will be wrapped with a new exception.
        if IS_IN_CI_PIPELINE and not isinstance(e, NotImplementedError):
            if (
                isinstance(exception, MlException)
                and exception.error_category in [ErrorCategory.SYSTEM_ERROR, ErrorCategory.UNKNOWN] # pylint: disable=no-member
            ) or (
                "errorCategory" in activityLogger.activity_info
                and activityLogger.activity_info["errorCategory"] in [ErrorCategory.SYSTEM_ERROR, ErrorCategory.UNKNOWN]
            ):
                raise Exception("Got InternalSDKError", e) from e
            raise
        raise
    finally:
        try:
            end_time = datetime.utcnow()
            duration_ms = round((end_time - start_time).total_seconds() * 1000, 2)

            activityLogger.activity_info["completionStatus"] = completion_status
            activityLogger.activity_info["durationMs"] = duration_ms
            message = "ActivityCompleted: Activity={}, HowEnded={}, Duration={} [ms]".format(
                activity_name, completion_status, duration_ms
            )
            if exception:
                message += ", Exception={}".format(type(exception).__name__)
                activityLogger.activity_info["exception"] = type(exception).__name__
                if isinstance(exception, MlException):
                    activityLogger.activity_info["errorMessage"] = exception.no_personal_data_message # pylint: disable=no-member
                    activityLogger.activity_info["errorTarget"] = exception.target # pylint: disable=no-member
                    activityLogger.activity_info["errorCategory"] = exception.error_category # pylint: disable=no-member
                    if exception.inner_exception: # pylint: disable=no-member
                        # pylint: disable=no-member
                        activityLogger.activity_info["innerException"] = type(exception.inner_exception).__name__
                activityLogger.error(message)
            else:
                activityLogger.info(message)
        except Exception: # pylint: disable=broad-except
            return # pylint: disable=lost-exception


def monitor_with_activity(
    logger,
    activity_name,
    activity_type=ActivityType.INTERNALCALL,
    custom_dimensions=None,
):
    """Add a wrapper for monitoring an activity (code).

    An activity is a logical block of code that consumers want to monitor.
    To monitor, use the ``@monitor_with_activity`` decorator. As an alternative, you can also wrap the
    logical block of code with the ``log_activity()`` method.

    :param logger: The logger adapter.
    :type logger: logging.LoggerAdapter
    :param activity_name: The name of the activity. The name should be unique per the wrapped logical code block.
    :type activity_name: str
    :param activity_type: One of PUBLICAPI, INTERNALCALL, or CLIENTPROXY which represent an incoming API call,
        an internal (function) call, or an outgoing API call. If not specified, INTERNALCALL is used.
    :type activity_type: str
    :param custom_dimensions: The custom properties of the activity.
    :type custom_dimensions: dict
    :return:
    """

    def monitor(f):
        @functools.wraps(f)
        def wrapper(*args, **kwargs):
            with log_activity(logger, activity_name or f.__name__, activity_type, custom_dimensions):
                return f(*args, **kwargs)

        return wrapper

    return monitor


def monitor_with_telemetry_mixin(
    logger,
    activity_name,
    activity_type=ActivityType.INTERNALCALL,
    custom_dimensions=None,
    extra_keys=None,
):
    """Add a wrapper for monitoring an activity (code) with telemetry mixin.

    An activity is a logical block of code that consumers want to monitor.
    Object telemetry values will be added into custom dimensions if activity parameter or return object is
    an instance of TelemetryMixin, which means log dimension will include: 1. telemetry collected from
    parameter object. 2. custom dimensions passed in. 3.(optional) if no telemetry found in parameter,
    will collect from return value.
    To monitor, use the ``@monitor_with_telemetry_mixin`` decorator.

    :param logger: The logger adapter.
    :type logger: logging.LoggerAdapter
    :param activity_name: The name of the activity. The name should be unique per the wrapped logical code block.
    :type activity_name: str
    :param activity_type: One of PUBLICAPI, INTERNALCALL, or CLIENTPROXY which represent an incoming API call,
        an internal (function) call, or an outgoing API call. If not specified, INTERNALCALL is used.
    :type activity_type: str
    :param custom_dimensions: The custom properties of the activity.
    :type custom_dimensions: dict
    :param extra_keys: Extra keys from parameter to be tracked. The key in extra_keys will always be added into
        dimensions, the value of it will be str(obj) if it exists in parameters, or 'None' if not.
    :type extra_keys: list[str]
    :return:
    """

    def monitor(f):
        def _collect_from_parameters(f, args, kwargs, extra_keys):
            dimensions = {}
            named_args = dict(zip(inspect.signature(f).parameters.keys(), args))
            parameters = {**named_args, **kwargs}
            from azure.ai.ml.entities._mixins import TelemetryMixin

            # extract mixin dimensions from arguments
            for key, obj in parameters.items():
                try:
                    if isinstance(obj, TelemetryMixin):
                        dimensions.update(obj._get_telemetry_values())
                    elif extra_keys and key in extra_keys:
                        dimensions[key] = str(obj)
                except Exception: # pylint: disable=broad-except
                    pass
            # add left keys with None
            if extra_keys:
                for key in extra_keys:
                    if key not in parameters:
                        dimensions[key] = "None"
            return dimensions

        def _collect_from_return_value(value):
            from azure.ai.ml.entities._mixins import TelemetryMixin

            try:
                return value._get_telemetry_values() if isinstance(value, TelemetryMixin) else {}
            except Exception: # pylint: disable=broad-except
                return {}

        @functools.wraps(f)
        def wrapper(*args, **kwargs):
            parameter_dimensions = _collect_from_parameters(f, args, kwargs, extra_keys)
            dimensions = {**parameter_dimensions, **(custom_dimensions or {})}
            with log_activity(logger, activity_name or f.__name__, activity_type, dimensions) as activityLogger:
                return_value = f(*args, **kwargs)
                if not parameter_dimensions:
                    # collect from return if no dimensions from parameter
                    activityLogger.activity_info.update(_collect_from_return_value(return_value))
                return return_value

        return wrapper

    return monitor
