import logging
from threading import Lock
from typing import Union

import contexts
from core.datasource.__base.datasource_plugin import DatasourcePlugin
from core.datasource.__base.datasource_provider import DatasourcePluginProviderController
from core.datasource.entities.common_entities import I18nObject
from core.datasource.errors import DatasourceProviderNotFoundError
from core.plugin.impl.datasource import PluginDatasourceManager

logger = logging.getLogger(__name__)


class DatasourceManager:
    _builtin_provider_lock = Lock()
    _hardcoded_providers: dict[str, DatasourcePluginProviderController] = {}
    _builtin_providers_loaded = False
    _builtin_tools_labels: dict[str, Union[I18nObject, None]] = {}

    @classmethod
    def get_datasource_plugin_provider(cls, provider: str, tenant_id: str) -> DatasourcePluginProviderController:
        """
        get the datasource plugin provider
        """
        # check if context is set
        try:
            contexts.datasource_plugin_providers.get()
        except LookupError:
            contexts.datasource_plugin_providers.set({})
            contexts.datasource_plugin_providers_lock.set(Lock())

        with contexts.datasource_plugin_providers_lock.get():
            datasource_plugin_providers = contexts.datasource_plugin_providers.get()
            if provider in datasource_plugin_providers:
                return datasource_plugin_providers[provider]

            manager = PluginDatasourceManager()
            provider_entity = manager.fetch_datasource_provider(tenant_id, provider)
            if not provider_entity:
                raise DatasourceProviderNotFoundError(f"plugin provider {provider} not found")

            controller = DatasourcePluginProviderController(
                entity=provider_entity.declaration,
                plugin_id=provider_entity.plugin_id,
                plugin_unique_identifier=provider_entity.plugin_unique_identifier,
                tenant_id=tenant_id,
            )

            datasource_plugin_providers[provider] = controller

        return controller

    @classmethod
    def get_datasource_runtime(
        cls,
        provider_id: str,
        datasource_name: str,
        tenant_id: str,
    ) -> DatasourcePlugin:
        """
        get the datasource runtime

        :param provider_type: the type of the provider
        :param provider_id: the id of the provider
        :param datasource_name: the name of the datasource
        :param tenant_id: the tenant id

        :return: the datasource plugin
        """
        return cls.get_datasource_plugin_provider(provider_id, tenant_id).get_datasource(datasource_name)

    @classmethod
    def list_datasource_providers(cls, tenant_id: str) -> list[DatasourcePluginProviderController]:
        """
        list all the datasource providers
        """
        manager = PluginDatasourceManager()
        provider_entities = manager.fetch_datasource_providers(tenant_id)
        return [
            DatasourcePluginProviderController(
                entity=provider.declaration,
                plugin_id=provider.plugin_id,
                plugin_unique_identifier=provider.plugin_unique_identifier,
                tenant_id=tenant_id,
            )
            for provider in provider_entities
        ]