from abc import abstractmethod
from os import listdir, path
from typing import Any

from pydantic import Field

from core.entities.provider_entities import ProviderConfig
from core.helper.module_import_helper import load_single_subclass_from_source
from core.tools.entities.tool_entities import ToolProviderType
from core.tools.entities.values import ToolLabelEnum, default_tool_label_dict
from core.tools.errors import (
    ToolProviderNotFoundError,
)
from core.tools.provider.tool_provider import ToolProviderController
from core.tools.tool.builtin_tool import BuiltinTool
from core.tools.utils.yaml_utils import load_yaml_file


class BuiltinToolProviderController(ToolProviderController):
    tools: list[BuiltinTool] = Field(default_factory=list)

    def __init__(self, **data: Any) -> None:
        if self.provider_type == ToolProviderType.API or self.provider_type == ToolProviderType.APP:
            super().__init__(**data)
            return
        
        # load provider yaml
        provider = self.__class__.__module__.split('.')[-1]
        yaml_path = path.join(path.dirname(path.realpath(__file__)), 'builtin', provider, f'{provider}.yaml')
        try:
            provider_yaml = load_yaml_file(yaml_path, ignore_error=False)
        except Exception as e:
            raise ToolProviderNotFoundError(f'can not load provider yaml for {provider}: {e}')

        if 'credentials_for_provider' in provider_yaml and provider_yaml['credentials_for_provider'] is not None:
            # set credentials name
            for credential_name in provider_yaml['credentials_for_provider']:
                provider_yaml['credentials_for_provider'][credential_name]['name'] = credential_name

        super().__init__(**{
            'identity': provider_yaml['identity'],
            'credentials_schema': provider_yaml.get('credentials_for_provider', {}) or {},
        })

    def _get_builtin_tools(self) -> list[BuiltinTool]:
        """
            returns a list of tools that the provider can provide

            :return: list of tools
        """
        if self.tools:
            return self.tools
        
        provider = self.identity.name
        tool_path = path.join(path.dirname(path.realpath(__file__)), "builtin", provider, "tools")
        # get all the yaml files in the tool path
        tool_files = list(filter(lambda x: x.endswith(".yaml") and not x.startswith("__"), listdir(tool_path)))
        tools = []
        for tool_file in tool_files:
            # get tool name
            tool_name = tool_file.split(".")[0]
            tool = load_yaml_file(path.join(tool_path, tool_file), ignore_error=False)

            # get tool class, import the module
            assistant_tool_class = load_single_subclass_from_source(
                module_name=f'core.tools.provider.builtin.{provider}.tools.{tool_name}',
                script_path=path.join(path.dirname(path.realpath(__file__)),
                                       'builtin', provider, 'tools', f'{tool_name}.py'),
                parent_type=BuiltinTool)
            tool["identity"]["provider"] = provider
            tools.append(assistant_tool_class(**tool))

        self.tools = tools
        return tools
    
    def get_credentials_schema(self) -> dict[str, ProviderConfig]:
        """
            returns the credentials schema of the provider

            :return: the credentials schema
        """
        if not self.credentials_schema:
            return {}
        
        return self.credentials_schema.copy()

    def get_tools(self) -> list[BuiltinTool]:
        """
            returns a list of tools that the provider can provide

            :return: list of tools
        """
        return self._get_builtin_tools()
    
    def get_tool(self, tool_name: str) -> BuiltinTool | None:
        """
            returns the tool that the provider can provide
        """
        return next(filter(lambda x: x.identity.name == tool_name, self.get_tools()), None)

    @property
    def need_credentials(self) -> bool:
        """
            returns whether the provider needs credentials

            :return: whether the provider needs credentials
        """
        return self.credentials_schema is not None and \
            len(self.credentials_schema) != 0

    @property
    def provider_type(self) -> ToolProviderType:
        """
            returns the type of the provider

            :return: type of the provider
        """
        return ToolProviderType.BUILT_IN

    @property
    def tool_labels(self) -> list[str]:
        """
            returns the labels of the provider

            :return: labels of the provider
        """
        label_enums = self._get_tool_labels()
        return [default_tool_label_dict[label].name for label in label_enums]

    def _get_tool_labels(self) -> list[ToolLabelEnum]:
        """
            returns the labels of the provider
        """
        return self.identity.tags or []
    
    def validate_credentials(self, credentials: dict[str, Any]) -> None:
        """
            validate the credentials of the provider

            :param tool_name: the name of the tool, defined in `get_tools`
            :param credentials: the credentials of the tool
        """
        # validate credentials format
        self.validate_credentials_format(credentials)

        # validate credentials
        self._validate_credentials(credentials)

    @abstractmethod
    def _validate_credentials(self, credentials: dict[str, Any]) -> None:
        """
            validate the credentials of the provider

            :param tool_name: the name of the tool, defined in `get_tools`
            :param credentials: the credentials of the tool
        """
        pass