# -*- coding: utf-8 -*-

#  Copyright 2017 Michael De La Rue | Ansible
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

"""This module adds shared support for generic Amazon AWS modules

In order to use this module, include it as part of a custom
module as shown below.

  from ansible_collections.amazon.aws.plugins.module_utils.modules import AnsibleAWSModule
  module = AnsibleAWSModule(argument_spec=dictionary, supports_check_mode=boolean
                            mutually_exclusive=list1, required_together=list2)

The 'AnsibleAWSModule' module provides similar, but more restricted,
interfaces to the normal Ansible module.  It also includes the
additional methods for connecting to AWS using the standard module arguments

    m.resource('lambda') # - get an AWS connection as a boto3 resource.

or

    m.client('sts') # - get an AWS connection as a boto3 client.

To make use of AWSRetry easier, it can now be wrapped around any call from a
module-created client. To add retries to a client, create a client:

    m.client('ec2', retry_decorator=AWSRetry.jittered_backoff(retries=10))

Any calls from that client can be made to use the decorator passed at call-time
using the `aws_retry` argument. By default, no retries are used.

    ec2 = m.client('ec2', retry_decorator=AWSRetry.jittered_backoff(retries=10))
    ec2.describe_instances(InstanceIds=['i-123456789'], aws_retry=True)

The call will be retried the specified number of times, so the calling functions
don't need to be wrapped in the backoff decorator.
"""

import logging
import re
import traceback
from io import StringIO
from typing import Any
from typing import Dict
from typing import NoReturn
from typing import Optional

from ansible.module_utils._text import to_native
from ansible.module_utils.ansible_release import __version__ as _ANSIBLE_CORE_VERSION
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.basic import env_fallback
from ansible.module_utils.basic import missing_required_lib
from ansible.module_utils.common.dict_transformations import camel_dict_to_snake_dict

from .botocore import boto3_at_least
from .botocore import boto3_conn
from .botocore import botocore_at_least
from .botocore import check_sdk_version_supported
from .botocore import gather_sdk_versions
from .botocore import get_aws_connection_info
from .botocore import get_aws_region
from .exceptions import AnsibleBotocoreError
from .retries import RetryingBotoClientWrapper

# Currently only AnsibleAWSModule.  However we have a lot of Copy and Paste code
# for Inventory and Lookup modules which we should refactor


class AnsibleAWSModule:
    """An ansible module class for AWS modules

    AnsibleAWSModule provides an a class for building modules which
    connect to Amazon Web Services.  The interface is currently more
    restricted than the basic module class with the aim that later the
    basic module class can be reduced.  If you find that any key
    feature is missing please contact the author/Ansible AWS team
    (available on #ansible-aws on IRC) to request the additional
    features needed.
    """

    default_settings = {"default_args": True, "check_boto3": True, "auto_retry": True, "module_class": AnsibleModule}

    def __init__(self, **kwargs):
        local_settings = {}
        for key, default_value in AnsibleAWSModule.default_settings.items():
            try:
                local_settings[key] = kwargs.pop(key)
            except KeyError:
                local_settings[key] = default_value
        self.settings = local_settings

        if local_settings["default_args"]:
            argument_spec_full = aws_argument_spec()
            try:
                argument_spec_full.update(kwargs["argument_spec"])
            except (TypeError, NameError):
                pass
            kwargs["argument_spec"] = argument_spec_full

        self._module = AnsibleAWSModule.default_settings["module_class"](**kwargs)
        # Initialize warnings buffer early, before any code invokes self.warn()
        self._warnings = []

        if local_settings["check_boto3"]:
            try:
                check_sdk_version_supported(warn=self.warn)
            except AnsibleBotocoreError as e:
                self._module.fail_json(to_native(e))

        self.check_mode = self._module.check_mode
        self._diff = self._module._diff
        self._name = self._module._name

        self._botocore_endpoint_log_stream = StringIO()
        self.logger = None
        if self.params.get("debug_botocore_endpoint_logs"):
            self.logger = logging.getLogger("botocore.endpoint")
            self.logger.setLevel(logging.DEBUG)
            self.logger.addHandler(logging.StreamHandler(self._botocore_endpoint_log_stream))

    def _should_inject_warnings(self) -> bool:
        # Inject warnings into the JSON result for ansible-core versions that
        # do not include them automatically (>=2.19 based on CI behavior).
        try:
            parts = [int(p) for p in _ANSIBLE_CORE_VERSION.split(".")[:2]]
            major, minor = (parts + [0, 0])[:2]
            return (major, minor) >= (2, 19)
        except Exception:
            return False

    @property
    def params(self) -> Dict[str, Any]:
        return self._module.params

    def _get_resource_action_list(self):
        actions = []
        for ln in self._botocore_endpoint_log_stream.getvalue().split("\n"):
            ln = ln.strip()
            if not ln:
                continue
            try:
                found_operational_request = re.search(r"OperationModel\(name=.*?\)", ln)
                operation_request = found_operational_request.group(0)[  # pyright: ignore[reportOptionalMemberAccess]
                    20:-1
                ]
                resource = re.search(r"https://.*?\.", ln).group(0)[8:-1]  # pyright: ignore[reportOptionalMemberAccess]
                actions.append(f"{resource}:{operation_request}")
            except AttributeError:
                pass
        return list(set(actions))

    def exit_json(self, *args, **kwargs) -> NoReturn:
        if self.params.get("debug_botocore_endpoint_logs"):
            kwargs["resource_actions"] = self._get_resource_action_list()
        if self._should_inject_warnings() and getattr(self, "_warnings", None) and "warnings" not in kwargs:
            kwargs["warnings"] = list(dict.fromkeys(self._warnings))
        self._module.exit_json(*args, **kwargs)

    def fail_json(self, *args, **kwargs) -> NoReturn:
        if self.params.get("debug_botocore_endpoint_logs"):
            kwargs["resource_actions"] = self._get_resource_action_list()
        if self._should_inject_warnings() and getattr(self, "_warnings", None) and "warnings" not in kwargs:
            kwargs["warnings"] = list(dict.fromkeys(self._warnings))
        self._module.fail_json(*args, **kwargs)

    def debug(self, *args, **kwargs) -> None:
        return self._module.debug(*args, **kwargs)

    def warn(self, *args, **kwargs) -> None:
        # Record warnings so unit tests can assert on them and include in JSON result
        if args and isinstance(args[0], str):
            if not hasattr(self, "_warnings"):
                self._warnings = []
            self._warnings.append(args[0])
        # Forward to underlying AnsibleModule.warn to emit warnings
        return self._module.warn(*args, **kwargs)

    def __getattr__(self, attr):
        if hasattr(self._module, attr):
            return getattr(self._module, attr)
        raise AttributeError(f"AnsibleAWSModule has no attribute '{attr}'")

    def boolean(self, *args, **kwargs) -> bool:
        return self._module.boolean(*args, **kwargs)

    def md5(self, *args, **kwargs) -> str:
        return self._module.md5(*args, **kwargs)

    def client(self, service: str, retry_decorator=None, **extra_params):
        region, endpoint_url, aws_connect_kwargs = get_aws_connection_info(self)
        kw_args = dict(region=region, endpoint=endpoint_url, **aws_connect_kwargs)
        kw_args.update(extra_params)
        conn = boto3_conn(self, conn_type="client", resource=service, **kw_args)
        return conn if retry_decorator is None else RetryingBotoClientWrapper(conn, retry_decorator)

    def resource(self, service: str, **extra_params):
        region, endpoint_url, aws_connect_kwargs = get_aws_connection_info(self)
        kw_args = dict(region=region, endpoint=endpoint_url, **aws_connect_kwargs)
        kw_args.update(extra_params)
        return boto3_conn(self, conn_type="resource", resource=service, **kw_args)

    @property
    def region(self) -> Optional[str]:
        return get_aws_region(self)

    def fail_json_aws(self, exception: BaseException, msg: Optional[str] = None, **kwargs) -> NoReturn:
        """call fail_json with processed exception

        function for converting exceptions thrown by AWS SDK modules,
        botocore, boto3 and boto, into nice error messages.
        """
        last_traceback = traceback.format_exc()

        # to_native is trusted to handle exceptions that str() could
        # convert to text.
        try:
            except_msg = to_native(exception.message)  # pyright: ignore[reportAttributeAccessIssue]
        except AttributeError:
            except_msg = to_native(exception)

        if msg is not None:
            message = f"{msg}: {except_msg}"
        else:
            message = except_msg

        try:
            response = exception.response  # pyright: ignore[reportAttributeAccessIssue]
        except AttributeError:
            response = None

        failure = dict(msg=message, exception=last_traceback, **self._gather_versions())

        failure.update(kwargs)

        if response is not None:
            failure.update(**camel_dict_to_snake_dict(response))

        self.fail_json(**failure)

    def fail_json_aws_error(self, exception) -> NoReturn:
        """A helper to call the right failure mode after catching an AnsibleAWSError"""
        if exception.exception:
            self.fail_json_aws(exception.exception, msg=exception.message)
        self.fail_json(msg=exception.message)

    def _gather_versions(self) -> Dict[str, Any]:
        """Gather AWS SDK (boto3 and botocore) dependency versions

        Returns {'boto3_version': str, 'botocore_version': str}
        Returns {} if either is not installed
        """
        return gather_sdk_versions()

    def require_boto3_at_least(self, desired: str, **kwargs) -> None:
        """Check if the available boto3 version is greater than or equal to a desired version.

        calls fail_json() when the boto3 version is less than the desired
        version

        Usage:
            module.require_boto3_at_least("1.2.3", reason="to update tags")
            module.require_boto3_at_least("1.1.1")

        :param desired the minimum desired version
        :param reason why the version is required (optional)
        """
        if not self.boto3_at_least(desired):
            self._module.fail_json(
                msg=missing_required_lib(f"boto3>={desired}", **kwargs),
                **self._gather_versions(),
            )

    def boto3_at_least(self, desired: str) -> bool:
        return boto3_at_least(desired)

    def require_botocore_at_least(self, desired: str, **kwargs) -> None:
        """Check if the available botocore version is greater than or equal to a desired version.

        calls fail_json() when the botocore version is less than the desired
        version

        Usage:
            module.require_botocore_at_least("1.2.3", reason="to update tags")
            module.require_botocore_at_least("1.1.1")

        :param desired the minimum desired version
        :param reason why the version is required (optional)
        """
        if not self.botocore_at_least(desired):
            self._module.fail_json(
                msg=missing_required_lib(f"botocore>={desired}", **kwargs),
                **self._gather_versions(),
            )

    def botocore_at_least(self, desired: str) -> bool:
        return botocore_at_least(desired)


def _aws_common_argument_spec() -> Dict["str", Any]:
    """
    This does not include 'region' as some AWS APIs don't require a
    region.  However, it's not recommended to do this as it means module_defaults
    can't include the region parameter.
    """
    return dict(
        access_key=dict(
            aliases=["aws_access_key_id", "aws_access_key"],
            fallback=(env_fallback, ["AWS_ACCESS_KEY_ID", "AWS_ACCESS_KEY"]),
            no_log=False,
        ),
        secret_key=dict(
            aliases=["aws_secret_access_key", "aws_secret_key"],
            fallback=(env_fallback, ["AWS_SECRET_ACCESS_KEY", "AWS_SECRET_KEY"]),
            no_log=True,
        ),
        session_token=dict(
            aliases=["aws_session_token"],
            fallback=(env_fallback, ["AWS_SESSION_TOKEN"]),
            no_log=True,
        ),
        profile=dict(
            aliases=["aws_profile"],
            fallback=(env_fallback, ["AWS_PROFILE", "AWS_DEFAULT_PROFILE"]),
        ),
        endpoint_url=dict(
            aliases=["aws_endpoint_url"],
            fallback=(env_fallback, ["AWS_URL"]),
        ),
        validate_certs=dict(
            type="bool",
            default=True,
        ),
        aws_ca_bundle=dict(
            type="path",
            fallback=(env_fallback, ["AWS_CA_BUNDLE"]),
        ),
        aws_config=dict(
            type="dict",
        ),
        debug_botocore_endpoint_logs=dict(
            type="bool",
            default=False,
            fallback=(env_fallback, ["ANSIBLE_DEBUG_BOTOCORE_LOGS"]),
        ),
    )


def aws_argument_spec() -> Dict["str", Any]:
    """
    Returns a dictionary containing the argument_spec common to all AWS modules.
    """
    region_spec = dict(
        region=dict(
            aliases=["aws_region"],
            fallback=(env_fallback, ["AWS_REGION", "AWS_DEFAULT_REGION"]),
        ),
    )
    spec = _aws_common_argument_spec()
    spec.update(region_spec)
    return spec
