import base64
from collections.abc import Iterable
from typing import Any, Optional

import xmltodict

from moto.core.base_backend import BackendDict, BaseBackend
from moto.core.common_models import BaseModel
from moto.core.utils import utcnow
from moto.moto_api._internal import mock_random
from moto.utilities.tagging_service import TaggingService
from moto.utilities.utils import get_partition

from .configuration import DEFAULT_CONFIGURATION_DATA
from .exceptions import (
    UnknownBroker,
    UnknownConfiguration,
    UnknownEngineType,
    UnknownUser,
)


class ConfigurationRevision(BaseModel):
    def __init__(
        self,
        configuration_id: str,
        revision_id: str,
        description: str,
        data: Optional[str] = None,
    ):
        self.configuration_id = configuration_id
        self.created = utcnow()
        self.description = description
        self.is_invalid = False
        self.revision_id = revision_id

        if data is None:
            self.data = DEFAULT_CONFIGURATION_DATA
        else:
            self.data = data

    def has_ldap_auth(self) -> bool:
        try:
            xml = base64.b64decode(self.data)
            dct = xmltodict.parse(xml, dict_constructor=dict)
            return (
                "cachedLDAPAuthorizationMap"
                in dct["broker"]["plugins"]["authorizationPlugin"]["map"]
            )
        except Exception:
            # There are many configurations to enable LDAP
            # We're only checking for one here
            # If anything fails, lets assume it's not LDAP
            return False

    @property
    def revision(self) -> str:
        return self.revision_id


class Configuration(BaseModel):
    def __init__(
        self,
        account_id: str,
        region: str,
        name: str,
        engine_type: str,
        engine_version: str,
    ):
        self.id = f"c-{mock_random.get_random_hex(6)}"
        self.arn = f"arn:{get_partition(region)}:mq:{region}:{account_id}:configuration:{self.id}"
        self.created = utcnow()

        self.name = name
        self.engine_type = engine_type
        self.engine_version = engine_version

        self.revisions: dict[str, ConfigurationRevision] = {}
        default_desc = (
            f"Auto-generated default for {self.name} on {engine_type} {engine_version}"
        )
        latest_revision = ConfigurationRevision(
            configuration_id=self.id, revision_id="1", description=default_desc
        )
        self.revisions[latest_revision.revision_id] = latest_revision

        self.authentication_strategy = (
            "ldap" if latest_revision.has_ldap_auth() else "simple"
        )

    def update(self, data: str, description: str) -> None:
        max_revision_id, _ = sorted(self.revisions.items())[-1]
        next_revision_id = str(int(max_revision_id) + 1)
        latest_revision = ConfigurationRevision(
            configuration_id=self.id,
            revision_id=next_revision_id,
            description=description,
            data=data,
        )
        self.revisions[next_revision_id] = latest_revision

        self.authentication_strategy = (
            "ldap" if latest_revision.has_ldap_auth() else "simple"
        )

    def get_revision(self, revision_id: str) -> ConfigurationRevision:
        return self.revisions[revision_id]

    @property
    def latest_revision(self) -> ConfigurationRevision:
        _, latest_revision = sorted(self.revisions.items())[-1]
        return latest_revision


class User(BaseModel):
    def __init__(
        self,
        broker_id: str,
        username: str,
        console_access: Optional[bool] = None,
        groups: Optional[list[str]] = None,
    ):
        self.broker_id = broker_id
        self.username = username
        self.console_access = console_access or False
        self.groups = groups or []

    def update(
        self, console_access: Optional[bool], groups: Optional[list[str]]
    ) -> None:
        if console_access is not None:
            self.console_access = console_access
        if groups:
            self.groups = groups


class Broker(BaseModel):
    def __init__(
        self,
        name: str,
        account_id: str,
        region: str,
        authentication_strategy: str,
        auto_minor_version_upgrade: bool,
        configuration: dict[str, Any],
        deployment_mode: str,
        encryption_options: Optional[dict[str, Any]],
        engine_type: str,
        engine_version: str,
        host_instance_type: str,
        ldap_server_metadata: Optional[dict[str, Any]],
        logs: dict[str, bool],
        maintenance_window_start_time: Optional[dict[str, Any]],
        publicly_accessible: bool,
        security_groups: list[str],
        storage_type: str,
        subnet_ids: list[str],
        users: list[dict[str, Any]],
    ):
        self.name = name
        self.id = mock_random.get_random_hex(6)
        self.arn = (
            f"arn:{get_partition(region)}:mq:{region}:{account_id}:broker:{self.id}"
        )
        self.state = "RUNNING"
        self.created = utcnow()

        self.authentication_strategy = authentication_strategy
        self.auto_minor_version_upgrade = auto_minor_version_upgrade
        self.deployment_mode = deployment_mode
        self.encryption_options = encryption_options
        if not self.encryption_options:
            self.encryption_options = {"useAwsOwnedKey": True}
        self.engine_type = engine_type
        self.engine_version = engine_version
        self.host_instance_type = host_instance_type
        self.ldap_server_metadata = ldap_server_metadata
        self.logs = logs
        if "general" not in self.logs:
            self.logs["general"] = False
        if "audit" not in self.logs:
            if self.engine_type.upper() == "ACTIVEMQ":
                self.logs["audit"] = False
        self.maintenance_window_start_time = maintenance_window_start_time
        if not self.maintenance_window_start_time:
            self.maintenance_window_start_time = {
                "dayOfWeek": "Sunday",
                "timeOfDay": "00:00",
                "timeZone": "UTC",
            }
        self.publicly_accessible = publicly_accessible
        self.security_groups = security_groups
        self.storage_type = storage_type
        self.subnet_ids = subnet_ids
        if not self.subnet_ids:
            if self.deployment_mode == "CLUSTER_MULTI_AZ":
                self.subnet_ids = [
                    "default-az1",
                    "default-az2",
                    "default-az3",
                    "default-az4",
                ]
            elif self.deployment_mode == "ACTIVE_STANDBY_MULTI_AZ":
                self.subnet_ids = ["active-subnet", "standby-subnet"]
            else:
                self.subnet_ids = ["default-subnet"]

        self._users: dict[str, User] = {}
        for user in users:
            self.create_user(
                username=user["username"],
                groups=user.get("groups", []),
                console_access=user.get("consoleAccess", False),
            )

        self.configurations: dict[str, Any] = {"current": configuration, "history": []}
        if self.engine_type.upper() == "RABBITMQ":
            console_url = f"https://0000.mq.{region}.amazonaws.com"
            endpoints = ["amqps://mockmq:5671"]
        else:
            console_url = f"https://0000.mq.{region}.amazonaws.com:8162"
            endpoints = [
                "ssl://mockmq:61617",
                "amqp+ssl://mockmq:5671",
                "stomp+ssl://mockmq:61614",
                "mqtt+ssl://mockmq:8883",
                "wss://mockmq:61619",
            ]
        self.instances = [
            {
                "consoleURL": console_url,
                "endpoints": endpoints,
                "ipAddress": "192.168.0.1",
            }
        ]

        if deployment_mode == "ACTIVE_STANDBY_MULTI_AZ":
            self.instances.append(
                {
                    "consoleURL": console_url,
                    "endpoints": endpoints,
                    "ipAddress": "192.168.0.2",
                }
            )

    def update(
        self,
        authentication_strategy: Optional[str],
        auto_minor_version_upgrade: Optional[bool],
        configuration: Optional[dict[str, Any]],
        engine_version: Optional[str],
        host_instance_type: Optional[str],
        ldap_server_metadata: Optional[dict[str, Any]],
        logs: Optional[dict[str, bool]],
        maintenance_window_start_time: Optional[dict[str, str]],
        security_groups: Optional[list[str]],
    ) -> None:
        if authentication_strategy:
            self.authentication_strategy = authentication_strategy
        if auto_minor_version_upgrade is not None:
            self.auto_minor_version_upgrade = auto_minor_version_upgrade
        if configuration:
            self.configurations["history"].append(self.configurations["current"])
            self.configurations["current"] = configuration
        if engine_version:
            self.engine_version = engine_version
        if host_instance_type:
            self.host_instance_type = host_instance_type
        if ldap_server_metadata:
            self.ldap_server_metadata = ldap_server_metadata
        if logs:
            self.logs = logs
        if maintenance_window_start_time:
            self.maintenance_window_start_time = maintenance_window_start_time
        if security_groups:
            self.security_groups = security_groups

    def reboot(self) -> None:
        pass

    def create_user(
        self, username: str, console_access: bool, groups: list[str]
    ) -> None:
        user = User(self.id, username, console_access, groups)
        self._users[username] = user

    def update_user(
        self, username: str, console_access: bool, groups: list[str]
    ) -> None:
        user = self.get_user(username)
        user.update(console_access, groups)

    def get_user(self, username: str) -> User:
        if username not in self._users:
            raise UnknownUser(username)
        return self._users[username]

    def delete_user(self, username: str) -> None:
        self._users.pop(username, None)

    def list_users(self) -> Iterable[User]:
        return self._users.values()

    @property
    def users(self) -> Iterable[User]:
        return self._users.values()


class MQBackend(BaseBackend):
    """
    No EC2 integration exists yet - subnet ID's and security group values are not validated. Default values may not exist.
    """

    def __init__(self, region_name: str, account_id: str):
        super().__init__(region_name, account_id)
        self.brokers: dict[str, Broker] = {}
        self.configs: dict[str, Configuration] = {}
        self.tagger = TaggingService()

    def create_broker(
        self,
        authentication_strategy: str,
        auto_minor_version_upgrade: bool,
        broker_name: str,
        configuration: Optional[dict[str, Any]],
        deployment_mode: str,
        encryption_options: Optional[dict[str, Any]],
        engine_type: str,
        engine_version: str,
        host_instance_type: str,
        ldap_server_metadata: Optional[dict[str, Any]],
        logs: dict[str, bool],
        maintenance_window_start_time: Optional[dict[str, Any]],
        publicly_accessible: bool,
        security_groups: list[str],
        storage_type: str,
        subnet_ids: list[str],
        tags: dict[str, str],
        users: list[dict[str, Any]],
    ) -> tuple[str, str]:
        if configuration is None:
            # create default configuration
            default_config = self.create_configuration(
                name=f"{broker_name}-configuration",
                engine_type=engine_type,
                engine_version=engine_version,
                tags={},
            )
            configuration = {"id": default_config.id, "revision": 1}
        broker = Broker(
            name=broker_name,
            account_id=self.account_id,
            region=self.region_name,
            authentication_strategy=authentication_strategy,
            auto_minor_version_upgrade=auto_minor_version_upgrade,
            configuration=configuration,
            deployment_mode=deployment_mode,
            encryption_options=encryption_options,
            engine_type=engine_type,
            engine_version=engine_version,
            host_instance_type=host_instance_type,
            ldap_server_metadata=ldap_server_metadata,
            logs=logs,
            maintenance_window_start_time=maintenance_window_start_time,
            publicly_accessible=publicly_accessible,
            security_groups=security_groups,
            storage_type=storage_type,
            subnet_ids=subnet_ids,
            users=users,
        )
        self.brokers[broker.id] = broker
        self.create_tags(broker.arn, tags)
        return broker.arn, broker.id

    def delete_broker(self, broker_id: str) -> None:
        del self.brokers[broker_id]

    def describe_broker(self, broker_id: str) -> Broker:
        if broker_id not in self.brokers:
            raise UnknownBroker(broker_id)
        return self.brokers[broker_id]

    def reboot_broker(self, broker_id: str) -> None:
        self.brokers[broker_id].reboot()

    def list_brokers(self) -> Iterable[Broker]:
        """
        Pagination is not yet implemented
        """
        return self.brokers.values()

    def create_user(
        self, broker_id: str, username: str, console_access: bool, groups: list[str]
    ) -> None:
        broker = self.describe_broker(broker_id)
        broker.create_user(username, console_access, groups)

    def update_user(
        self, broker_id: str, console_access: bool, groups: list[str], username: str
    ) -> None:
        broker = self.describe_broker(broker_id)
        broker.update_user(username, console_access, groups)

    def describe_user(self, broker_id: str, username: str) -> User:
        broker = self.describe_broker(broker_id)
        return broker.get_user(username)

    def delete_user(self, broker_id: str, username: str) -> None:
        broker = self.describe_broker(broker_id)
        broker.delete_user(username)

    def list_users(self, broker_id: str) -> Iterable[User]:
        broker = self.describe_broker(broker_id)
        return broker.list_users()

    def create_configuration(
        self, name: str, engine_type: str, engine_version: str, tags: dict[str, str]
    ) -> Configuration:
        if engine_type.upper() not in ["ACTIVEMQ", "RABBITMQ"]:
            raise UnknownEngineType(engine_type)
        config = Configuration(
            account_id=self.account_id,
            region=self.region_name,
            name=name,
            engine_type=engine_type,
            engine_version=engine_version,
        )
        self.configs[config.id] = config
        self.tagger.tag_resource(
            config.arn, self.tagger.convert_dict_to_tags_input(tags)
        )
        return config

    def update_configuration(
        self, config_id: str, data: str, description: str
    ) -> Configuration:
        """
        No validation occurs on the provided XML. The authenticationStrategy may be changed depending on the provided configuration.
        """
        config = self.configs[config_id]
        config.update(data, description)
        return config

    def describe_configuration(self, config_id: str) -> Configuration:
        if config_id not in self.configs:
            raise UnknownConfiguration(config_id)
        return self.configs[config_id]

    def describe_configuration_revision(
        self, config_id: str, revision_id: str
    ) -> ConfigurationRevision:
        config = self.configs[config_id]
        return config.get_revision(revision_id)

    def list_configurations(self) -> Iterable[Configuration]:
        """
        Pagination has not yet been implemented.
        """
        return self.configs.values()

    def create_tags(self, resource_arn: str, tags: dict[str, str]) -> None:
        self.tagger.tag_resource(
            resource_arn, self.tagger.convert_dict_to_tags_input(tags)
        )

    def list_tags(self, arn: str) -> dict[str, str]:
        return self.tagger.get_tag_dict_for_resource(arn)

    def delete_tags(self, resource_arn: str, tag_keys: list[str]) -> None:
        if not isinstance(tag_keys, list):
            tag_keys = [tag_keys]
        self.tagger.untag_resource_using_names(resource_arn, tag_keys)

    def update_broker(
        self,
        authentication_strategy: str,
        auto_minor_version_upgrade: bool,
        broker_id: str,
        configuration: dict[str, Any],
        engine_version: str,
        host_instance_type: str,
        ldap_server_metadata: dict[str, Any],
        logs: dict[str, bool],
        maintenance_window_start_time: dict[str, str],
        security_groups: list[str],
    ) -> None:
        broker = self.describe_broker(broker_id)
        broker.update(
            authentication_strategy=authentication_strategy,
            auto_minor_version_upgrade=auto_minor_version_upgrade,
            configuration=configuration,
            engine_version=engine_version,
            host_instance_type=host_instance_type,
            ldap_server_metadata=ldap_server_metadata,
            logs=logs,
            maintenance_window_start_time=maintenance_window_start_time,
            security_groups=security_groups,
        )


mq_backends = BackendDict(MQBackend, "mq")
