from collections.abc import AsyncGenerator
from json import dumps
from typing import TYPE_CHECKING

from agno.agent import Agent, RunContentEvent, ToolCallCompletedEvent, ToolCallStartedEvent
from agno.models.message import Message
from agno.models.metrics import Metrics
from agno.models.response import ToolExecution
from agno.utils.log import configure_agno_logging, log_error, log_warning
from gradio import Audio, Blocks, ChatInterface, ChatMessage, Error, Video
from gradio.components.chatbot import MetadataDict
from qdrant_client.http.exceptions import ResponseHandlingException

from chattr.agent.agent import AgentConfiguration, setup_agent
from chattr.agent.database import setup_database
from chattr.agent.description import setup_description
from chattr.agent.instructions import setup_instructions
from chattr.agent.knowledge import setup_knowledge
from chattr.agent.model import setup_model
from chattr.agent.tools import close_mcp_tools, setup_mcp_tools
from chattr.agent.vector_database import setup_vector_database
from chattr.app.logger import setup_logger
from chattr.app.settings import Settings

if TYPE_CHECKING:
    from logging import Logger

    from agno.db.json import JsonDb
    from agno.knowledge import Knowledge
    from agno.models.openai import OpenAILike
    from agno.tools.mcp import MultiMCPTools
    from agno.vectordb.qdrant import Qdrant


class App:
    """Main application class for the Chattr Multi-agent system app."""

    def __init__(self, settings: Settings) -> None:
        """Initialize the Chattr app."""
        self.settings = settings
        logger: Logger = setup_logger(self.settings.log)
        configure_agno_logging(custom_default_logger=logger)

    def gradio_app(self) -> Blocks:
        """Create and return the main Gradio Blocks interface for the Chattr app."""
        return ChatInterface(
            fn=self.generate_response,
            save_history=True,
            title="Chattr",
            show_progress="full",
        )

    def _response_at_run_content_event(
        self,
        history: list[ChatMessage | Audio | Video],
        response: RunContentEvent,
    ) -> list[ChatMessage | Audio | Video]:
        """Handle the response run content event."""
        if not isinstance(response, RunContentEvent):
            _msg = "Expected RunContentEvent"
            raise TypeError(_msg)
        history.append(ChatMessage(role="assistant", content=str(response.content)))
        return history

    def _response_at_tool_call_started_event(
        self,
        history: list[ChatMessage | Audio | Video],
        response: ToolCallStartedEvent,
    ) -> list[ChatMessage | Audio | Video]:
        """Handle the response tool call started event."""
        if not isinstance(response.tool, ToolExecution):
            _msg = "ToolExecution expected"
            log_error(_msg)
            raise TypeError(_msg)
        history.append(
            ChatMessage(
                role="assistant",
                content=dumps(response.tool.tool_args, indent=4),
                metadata=MetadataDict(
                    title=str(response.tool.tool_name),
                    id=str(response.tool.tool_call_id),
                    duration=response.tool.created_at,
                ),
            ),
        )
        return history

    def _response_at_tool_call_completed_event(
        self,
        history: list[ChatMessage | Audio | Video],
        response: ToolCallCompletedEvent,
    ) -> list[ChatMessage | Audio | Video]:
        """Handle the response tool call completed event."""
        if not isinstance(response.tool, ToolExecution):
            _msg = "ToolExecution expected"
            log_error(_msg)
            raise TypeError(_msg)
        if response.tool.tool_call_error:
            if not isinstance(response.tool.metrics, Metrics):
                _msg = "Metrics expected"
                log_error(_msg)
                raise TypeError(_msg)
            history.append(
                ChatMessage(
                    role="assistant",
                    content=dumps(response.tool.tool_args, indent=4),
                    metadata=MetadataDict(
                        title=str(response.tool.tool_name),
                        id=str(response.tool.tool_call_id),
                        log="Tool Call Failed",
                        duration=float(str(response.tool.metrics.duration)),
                    ),
                ),
            )
        else:
            if not isinstance(response.tool.metrics, Metrics):
                _msg = "Metrics expected"
                log_error(_msg)
                raise TypeError(_msg)
            history.append(
                ChatMessage(
                    role="assistant",
                    content=dumps(response.tool.tool_args, indent=4),
                    metadata=MetadataDict(
                        title=str(response.tool.tool_name),
                        id=str(response.tool.tool_call_id),
                        log="Tool Call Succeeded",
                        duration=float(str(response.tool.metrics.duration)),
                    ),
                ),
            )
            if response.tool.tool_name == "generate_audio_for_text":
                history.append(Audio(response.tool.result, autoplay=True))
            elif response.tool.tool_name == "generate_video_mcp":
                history.append(Video(response.tool.result, autoplay=True))
            else:
                _msg = f"Unknown tool name: {response.tool.tool_name}"
                log_error(_msg)
                raise Error(_msg, print_exception=self.settings.debug)
        return history

    async def generate_response(
        self,
        message: str,
        history: list[ChatMessage | Audio | Video],
    ) -> AsyncGenerator[list[ChatMessage | Audio | Video]]:
        """
        Generate a response to a user message and update the conversation history.

        This asynchronous method streams responses from the state graph and
        yields updated history and audio file paths as needed.

        Args:
            message: The user's input message as a string.
            history: The conversation history as a list of ChatMessage, Audio, or Video objects.

        Returns:
            AsyncGenerator: Yields a list of the updated history containing
                            ChatMessage, Audio, and Video objects if it existed.
        """
        try:
            _tools: list[MultiMCPTools] | None = None
            tools: MultiMCPTools | None = await setup_mcp_tools(self.settings.mcp)
            model: OpenAILike = setup_model(self.settings.model)
            db: JsonDb = setup_database()
            vectordb: Qdrant = setup_vector_database(self.settings.vector_database)
            knowledge: Knowledge = setup_knowledge(vectordb, db)
            description: str = setup_description(self.settings.character.name)
            instructions: list[str] = setup_instructions(self.settings.character.name, [tools])
            if not tools or len(tools.tools) == 0:
                _msg = "No tools found"
                log_warning(_msg)
            else:
                _tools = [tools]
            agent: Agent = await setup_agent(
                AgentConfiguration(
                    model=model,
                    tools=_tools,
                    description=description,
                    instructions=instructions,
                    db=db,
                    knowledge=knowledge,
                    timezone=self.settings.timezone,
                    debug_mode=self.settings.debug,
                ),
            )
            async for response in agent.arun(
                Message(content=message, role="user"),
                stream=True,
                stream_events=True,
            ):
                # pprint(response)
                if isinstance(response, RunContentEvent):
                    history = self._response_at_run_content_event(history, response)
                elif isinstance(response, ToolCallStartedEvent):
                    history = self._response_at_tool_call_started_event(history, response)
                elif isinstance(response, ToolCallCompletedEvent):
                    history = self._response_at_tool_call_completed_event(history, response)
                print(f"---------- {history}")
                yield history
            await close_mcp_tools(tools)
        except (StopAsyncIteration, StopIteration) as e:
            log_error(f"Iteration stopped. {e}")
        except ResponseHandlingException as e:
            log_error(f"Vector database is not reachable. {e}")
        except RuntimeError as e:
            log_error(f"Runtime error. {e}")
        except ValueError as e:
            log_error(f"Value error. {e}")
        except TypeError as e:
            log_error(f"Type error. {e}")
        except Exception as e:
            log_error(f"Unexpected error. {e}")
        finally:
            yield history