# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations

import functools
import inspect
import logging
import textwrap
from abc import ABC, abstractmethod
from collections.abc import Iterator
from contextlib import contextmanager
from datetime import datetime, timedelta
from typing import Any, Callable, cast, Literal, TYPE_CHECKING

from flask import g, has_request_context, request
from flask_appbuilder.const import API_URI_RIS_KEY
from sqlalchemy.exc import SQLAlchemyError

from superset.extensions import stats_logger_manager
from superset.utils import json
from superset.utils.core import get_user_id, LoggerLevel, to_int

if TYPE_CHECKING:
    pass

logger = logging.getLogger(__name__)


def collect_request_payload() -> dict[str, Any]:
    """Collect log payload identifiable from request context"""
    if not request:
        return {}

    payload: dict[str, Any] = {
        "path": request.path,
        **request.form.to_dict(),
        # url search params can overwrite POST body
        **request.args.to_dict(),
    }

    if request.is_json:
        json_payload = request.get_json(cache=True, silent=True) or {}
        payload.update(json_payload)

    # save URL match pattern in addition to the request path
    url_rule = str(request.url_rule)
    if url_rule != request.path:
        payload["url_rule"] = url_rule

    # remove rison raw string (q=xxx in search params) in favor of
    # rison object (could come from `payload_override`)
    if "rison" in payload and API_URI_RIS_KEY in payload:
        del payload[API_URI_RIS_KEY]
    # delete empty rison object
    if "rison" in payload and not payload["rison"]:
        del payload["rison"]

    return payload


def get_logger_from_status(
    status: int,
) -> tuple[Callable[..., None], str]:
    """
    Return logger method by status of exception.
    Maps logger level to status code level
    """
    log_map = {
        "2": LoggerLevel.INFO,
        "3": LoggerLevel.INFO,
        "4": LoggerLevel.WARNING,
        "5": LoggerLevel.EXCEPTION,
    }
    log_level = log_map[str(status)[0]]

    return (getattr(logger, log_level), log_level)


class AbstractEventLogger(ABC):
    # Parameters that are passed under the `curated_payload` arg to the log method
    curated_payload_params = {
        "force",
        "standalone",
        "runAsync",
        "json",
        "csv",
        "queryLimit",
        "select_as_cta",
    }
    # Similarly, parameters that are passed under the `curated_form_data` arg
    curated_form_data_params = {
        "dashboardId",
        "sliceId",
        "viz_type",
        "force",
        "compare_lag",
        "forecastPeriods",
        "granularity_sqla",
        "legendType",
        "legendOrientation",
        "show_legend",
        "time_grain_sqla",
    }

    def __call__(
        self,
        action: str,
        object_ref: str | None = None,
        log_to_statsd: bool = True,
        duration: timedelta | None = None,
        **payload_override: dict[str, Any],
    ) -> object:
        # pylint: disable=W0201
        self.action = action
        self.object_ref = object_ref
        self.log_to_statsd = log_to_statsd
        self.payload_override = payload_override
        return self

    def __enter__(self) -> None:
        # pylint: disable=W0201
        self.start = datetime.now()

    def __exit__(self, exc_type: Any, exc_val: Any, exc_tb: Any) -> None:
        # Log data w/ arguments being passed in
        self.log_with_context(
            action=self.action,
            object_ref=self.object_ref,
            log_to_statsd=self.log_to_statsd,
            duration=datetime.now() - self.start,
            **self.payload_override,
        )

    @classmethod
    def curate_payload(cls, payload: dict[str, Any]) -> dict[str, Any]:
        """Curate payload to only include relevant keys/safe keys"""
        return {k: v for k, v in payload.items() if k in cls.curated_payload_params}

    @classmethod
    def curate_form_data(cls, payload: dict[str, Any]) -> dict[str, Any]:
        """Curate form_data to only include relevant keys/safe keys"""
        return {k: v for k, v in payload.items() if k in cls.curated_form_data_params}

    @abstractmethod
    def log(  # pylint: disable=too-many-arguments
        self,
        user_id: int | None,
        action: str,
        dashboard_id: int | None,
        duration_ms: int | None,
        slice_id: int | None,
        referrer: str | None,
        curated_payload: dict[str, Any] | None,
        curated_form_data: dict[str, Any] | None,
        *args: Any,
        **kwargs: Any,
    ) -> None:
        pass

    def log_with_context(  # pylint: disable=too-many-locals,too-many-arguments
        self,
        action: str,
        duration: timedelta | None = None,
        object_ref: str | None = None,
        log_to_statsd: bool = True,
        database: Any | None = None,
        **payload_override: dict[str, Any] | None,
    ) -> None:
        # pylint: disable=import-outside-toplevel
        from superset import db
        from superset.views.core import get_form_data

        referrer = request.referrer[:1000] if request and request.referrer else None

        duration_ms = int(duration.total_seconds() * 1000) if duration else None

        # Initial try and grab user_id via flask.g.user
        user_id = get_user_id()

        # Whenever a user is not bounded to a session we
        # need to add them back before logging to capture user_id
        if user_id is None and has_request_context():
            try:
                actual_user = g.get("user", None)
                if actual_user is not None:
                    db.session.add(actual_user)
                    user_id = get_user_id()
            except Exception as ex:
                logging.warning("Failed to add user to db session: %s", ex)
                user_id = None
        payload = collect_request_payload()
        if object_ref:
            payload["object_ref"] = object_ref
        if payload_override:
            payload.update(payload_override)

        dashboard_id = to_int(payload.get("dashboard_id"))

        database_params = {"database_id": payload.get("database_id")}
        if database and type(database).__name__ == "Database":
            database_params = {
                "database_id": database.id,
                "engine": database.backend,
                "database_driver": database.driver,
            }

        form_data: dict[str, Any] = {}
        if "form_data" in payload:
            form_data, _ = get_form_data()
            payload["form_data"] = form_data
            slice_id = form_data.get("slice_id")
        else:
            slice_id = payload.get("slice_id")

        slice_id = to_int(slice_id)

        if log_to_statsd:
            stats_logger_manager.instance.incr(action)

        try:
            # bulk insert
            explode_by = payload.get("explode")
            records = json.loads(payload.get(explode_by))  # type: ignore
        except Exception:  # pylint: disable=broad-except
            records = [payload]

        self.log(
            user_id,
            action,
            records=records,
            dashboard_id=dashboard_id,
            slice_id=slice_id,
            duration_ms=duration_ms,
            referrer=referrer,
            curated_payload=self.curate_payload(payload),
            curated_form_data=self.curate_form_data(form_data),
            **database_params,
        )

    @contextmanager
    def log_context(
        self,
        action: str,
        object_ref: str | None = None,
        log_to_statsd: bool = True,
        **kwargs: Any,
    ) -> Iterator[Callable[..., None]]:
        """
        Log an event with additional information from the request context.
        :param action: a name to identify the event
        :param object_ref: reference to the Python object that triggered this action
        :param log_to_statsd: whether to update statsd counter for the action
        """
        payload_override = kwargs.copy()
        start = datetime.now()
        # yield a helper to add additional payload
        yield lambda **kwargs: payload_override.update(kwargs)
        duration = datetime.now() - start

        # take the action from payload_override else take the function param action
        action_str = payload_override.pop("action", action)
        self.log_with_context(
            action_str, duration, object_ref, log_to_statsd, **payload_override
        )

    def _wrapper(
        self,
        f: Callable[..., Any],
        action: str | Callable[..., str] | None = None,
        object_ref: str | Callable[..., str] | Literal[False] | None = None,
        allow_extra_payload: bool | None = False,
        **wrapper_kwargs: Any,
    ) -> Callable[..., Any]:
        @functools.wraps(f)
        def wrapper(*args: Any, **kwargs: Any) -> Any:
            action_str = (
                action(*args, **kwargs) if callable(action) else action
            ) or f.__name__
            object_ref_str = (
                object_ref(*args, **kwargs) if callable(object_ref) else object_ref
            ) or (f.__qualname__ if object_ref is not False else None)
            with self.log_context(
                action=action_str, object_ref=object_ref_str, **wrapper_kwargs
            ) as log:
                log(**kwargs)
                if allow_extra_payload:
                    # add a payload updater to the decorated function
                    value = f(*args, add_extra_log_payload=log, **kwargs)
                else:
                    value = f(*args, **kwargs)
            return value

        return wrapper

    def log_this(self, f: Callable[..., Any]) -> Callable[..., Any]:
        """Decorator that uses the function name as the action"""
        return self._wrapper(f)

    def log_this_with_context(
        self, allow_extra_payload: bool = False, **kwargs: Any
    ) -> Callable[..., Any]:
        """Decorator that can override kwargs of log_context"""

        def func(f: Callable[..., Any]) -> Callable[..., Any]:
            return self._wrapper(f, allow_extra_payload=allow_extra_payload, **kwargs)

        return func

    def log_this_with_extra_payload(self, f: Callable[..., Any]) -> Callable[..., Any]:
        """Decorator that instrument `update_log_payload` to kwargs"""
        return self._wrapper(f, allow_extra_payload=True)


def get_event_logger_from_cfg_value(cfg_value: Any) -> AbstractEventLogger:
    """
    This function implements the deprecation of assignment
    of class objects to EVENT_LOGGER configuration, and validates
    type of configured loggers.

    The motivation for this method is to gracefully deprecate the ability to configure
    EVENT_LOGGER with a class type, in favor of preconfigured instances which may have
    required construction-time injection of proprietary or locally-defined dependencies.

    :param cfg_value: The configured EVENT_LOGGER value to be validated
    :return: if cfg_value is a class type, will return a new instance created using a
    default con
    """
    result: Any = cfg_value
    if inspect.isclass(cfg_value):
        logging.warning(
            textwrap.dedent(
                """
                In superset private config, EVENT_LOGGER has been assigned a class
                object. In order to accommodate pre-configured instances without a
                default constructor, assignment of a class is deprecated and may no
                longer work at some point in the future. Please assign an object
                instance of a type that implements
                superset.utils.log.AbstractEventLogger.
                """
            )
        )

        event_logger_type = cast(type[Any], cfg_value)
        result = event_logger_type()

    # Verify that we have a valid logger impl
    if not isinstance(result, AbstractEventLogger):
        raise TypeError(
            "EVENT_LOGGER must be configured with a concrete instance"
            "of superset.utils.log.AbstractEventLogger."
        )

    logging.debug("Configured event logger of type %s", type(result))
    return cast(AbstractEventLogger, result)


class DBEventLogger(AbstractEventLogger):
    """Event logger that commits logs to Superset DB"""

    def log(  # pylint: disable=too-many-arguments,too-many-locals
        self,
        user_id: int | None,
        action: str,
        dashboard_id: int | None,
        duration_ms: int | None,
        slice_id: int | None,
        referrer: str | None,
        *args: Any,
        **kwargs: Any,
    ) -> None:
        # pylint: disable=import-outside-toplevel
        from superset import db
        from superset.models.core import Log

        records = kwargs.get("records", [])
        logs = []
        for record in records:
            json_string: str | None
            try:
                json_string = json.dumps(record)
            except Exception:  # pylint: disable=broad-except
                json_string = None
            log = Log(
                action=action,
                json=json_string,
                dashboard_id=dashboard_id or record.get("dashboard_id"),
                slice_id=slice_id or record.get("slice_id"),
                duration_ms=duration_ms,
                referrer=referrer,
                user_id=user_id,
            )
            logs.append(log)
        try:
            db.session.bulk_save_objects(logs)
            db.session.commit()  # pylint: disable=consider-using-transaction
        except SQLAlchemyError as ex:
            # Log errors but don't raise - logging failures should not break the
            # application. Common in tests where the session may be in prepared state or
            # db is locked
            logging.error("DBEventLogger failed to log event(s)")
            logging.exception(ex)
            # Rollback to clean up the session state
            try:
                db.session.rollback()
            except Exception:  # pylint: disable=broad-except
                # If rollback also fails, just continue - don't let issues crash the app
                logging.error(
                    "DBEventLogger failed to rollback the session after failure"
                )


class StdOutEventLogger(AbstractEventLogger):
    """Event logger that prints to stdout for debugging purposes"""

    def log(  # pylint: disable=too-many-arguments
        self,
        user_id: int | None,
        action: str,
        dashboard_id: int | None,
        duration_ms: int | None,
        slice_id: int | None,
        referrer: str | None,
        curated_payload: dict[str, Any] | None,
        curated_form_data: dict[str, Any] | None,
        *args: Any,
        **kwargs: Any,
    ) -> None:
        data = dict(  # pylint: disable=use-dict-literal
            user_id=user_id,
            action=action,
            dashboard_id=dashboard_id,
            duration_ms=duration_ms,
            slice_id=slice_id,
            referrer=referrer,
            curated_payload=curated_payload,
            curated_form_data=curated_form_data,
            **kwargs,
        )
        print("StdOutEventLogger: ", data)