Gradio_UI.py

#!/usr/bin/env python
# coding=utf-8
# Copyright 2024 The HuggingFace Inc. team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import mimetypes
import os
import re
import shutil
import tempfile # Import für temporäre Dateien
from typing import Optional

# Importiere PIL für Bildverarbeitung (füge 'Pillow' zu requirements.txt hinzu, falls nicht vorhanden)
try:
    from PIL import Image
except ImportError:
    print("WARNUNG: Pillow nicht installiert. Bildanzeige funktioniert möglicherweise nicht. Führe 'pip install Pillow' aus oder füge 'Pillow' zu requirements.txt hinzu.")
    Image = None

from smolagents.agent_types import AgentAudio, AgentImage, AgentText, handle_agent_output_types
from smolagents.agents import ActionStep, MultiStepAgent
from smolagents.memory import MemoryStep
from smolagents.utils import _is_package_available


def pull_messages_from_step(
    step_log: MemoryStep,
):
    """Extract ChatMessage objects from agent steps with proper nesting"""
    import gradio as gr

    # --- (Rest dieser Funktion bleibt unverändert) ---
    if isinstance(step_log, ActionStep):
        # Output the step number
        step_number = f"Step {step_log.step_number}" if step_log.step_number is not None else ""
        yield gr.ChatMessage(role="assistant", content=f"**{step_number}**")

        # First yield the thought/reasoning from the LLM
        if hasattr(step_log, "model_output") and step_log.model_output is not None:
            # Clean up the LLM output
            model_output = step_log.model_output.strip()
            # Remove any trailing <end_code> and extra backticks, handling multiple possible formats
            model_output = re.sub(r"```\s*<end_code>", "```", model_output)  # handles ```<end_code>
            model_output = re.sub(r"<end_code>\s*```", "```", model_output)  # handles <end_code>```
            model_output = re.sub(r"```\s*\n\s*<end_code>", "```", model_output)  # handles ```\n<end_code>
            model_output = model_output.strip()
            yield gr.ChatMessage(role="assistant", content=model_output)

        # For tool calls, create a parent message
        if hasattr(step_log, "tool_calls") and step_log.tool_calls is not None:
            first_tool_call = step_log.tool_calls[0]
            used_code = first_tool_call.name == "python_interpreter"
            parent_id = f"call_{len(step_log.tool_calls)}"

            # Tool call becomes the parent message with timing info
            # First we will handle arguments based on type
            args = first_tool_call.arguments
            if isinstance(args, dict):
                content = str(args.get("answer", str(args)))
            else:
                content = str(args).strip()

            if used_code:
                # Clean up the content by removing any end code tags
                content = re.sub(r"```.*?\n", "", content)  # Remove existing code blocks
                content = re.sub(r"\s*<end_code>\s*", "", content)  # Remove end_code tags
                content = content.strip()
                if not content.startswith("```python"):
                    content = f"```python\n{content}\n```"

            parent_message_tool = gr.ChatMessage(
                role="assistant",
                content=content,
                metadata={
                    "title": f"🛠️ Used tool {first_tool_call.name}",
                    "id": parent_id,
                    "status": "pending",
                },
            )
            yield parent_message_tool

            # Nesting execution logs under the tool call if they exist
            if hasattr(step_log, "observations") and (
                step_log.observations is not None and step_log.observations.strip()
            ):  # Only yield execution logs if there's actual content
                log_content = step_log.observations.strip()
                if log_content:
                    log_content = re.sub(r"^Execution logs:\s*", "", log_content)
                    yield gr.ChatMessage(
                        role="assistant",
                        content=f"{log_content}",
                        metadata={"title": "📝 Execution Logs", "parent_id": parent_id, "status": "done"},
                    )

            # Nesting any errors under the tool call
            if hasattr(step_log, "error") and step_log.error is not None:
                yield gr.ChatMessage(
                    role="assistant",
                    content=str(step_log.error),
                    metadata={"title": "💥 Error", "parent_id": parent_id, "status": "done"},
                )

            # Update parent message metadata to done status without yielding a new message
            parent_message_tool.metadata["status"] = "done"

        # Handle standalone errors but not from tool calls
        elif hasattr(step_log, "error") and step_log.error is not None:
            yield gr.ChatMessage(role="assistant", content=str(step_log.error), metadata={"title": "💥 Error"})

        # Calculate duration and token information
        step_footnote = f"{step_number}"
        if hasattr(step_log, "input_token_count") and hasattr(step_log, "output_token_count"):
            token_str = (
                f" | Input-tokens:{step_log.input_token_count:,} | Output-tokens:{step_log.output_token_count:,}"
            )
            step_footnote += token_str
        if hasattr(step_log, "duration"):
            step_duration = f" | Duration: {round(float(step_log.duration), 2)}" if step_log.duration else None
            step_footnote += step_duration
        step_footnote = f"""<span style="color: #bbbbc2; font-size: 12px;">{step_footnote}</span> """
        yield gr.ChatMessage(role="assistant", content=f"{step_footnote}")
        yield gr.ChatMessage(role="assistant", content="-----")


def stream_to_gradio(
    agent,
    task: str,
    reset_agent_memory: bool = False,
    additional_args: Optional[dict] = None,
):
    """Runs an agent with the given task and streams the messages from the agent as gradio ChatMessages."""
    if not _is_package_available("gradio"):
        raise ModuleNotFoundError(
            "Please install 'gradio' extra to use the GradioUI: `pip install 'smolagents[gradio]'`"
        )
    import gradio as gr

    total_input_tokens = 0
    total_output_tokens = 0

    for step_log in agent.run(task, stream=True, reset=reset_agent_memory, additional_args=additional_args):
        # Track tokens if model provides them
        if hasattr(agent.model, "last_input_token_count"):
            total_input_tokens += agent.model.last_input_token_count
            total_output_tokens += agent.model.last_output_token_count
            if isinstance(step_log, ActionStep):
                step_log.input_token_count = agent.model.last_input_token_count
                step_log.output_token_count = agent.model.last_output_token_count

        for message in pull_messages_from_step(
            step_log,
        ):
            yield message

    final_answer = step_log  # Last log is the run's final_answer
    final_answer = handle_agent_output_types(final_answer)

    # --- (Bildanzeige-Logik bleibt wie im vorherigen Schritt) ---
    if isinstance(final_answer, AgentText):
        yield gr.ChatMessage(
            role="assistant",
            content=f"**Final answer:**\n{final_answer.to_string()}\n",
        )
    elif isinstance(final_answer, AgentImage):
        # Versuche, das Bild anzuzeigen
        try:
            # Annahme: final_answer.image enthält ein PIL Image Objekt
            if Image is not None and hasattr(final_answer, 'image') and isinstance(final_answer.image, Image.Image):
                # Erstelle eine temporäre Datei zum Speichern des Bildes
                with tempfile.NamedTemporaryFile(delete=False, suffix=".png") as tmpfile:
                    final_answer.image.save(tmpfile.name, format="PNG")
                    temp_file_path = tmpfile.name
                print(f"Bild temporär gespeichert unter: {temp_file_path}") # Debugging-Ausgabe

                # Übergib den Pfad direkt als content
                yield gr.ChatMessage(
                    role="assistant",
                    content=temp_file_path, # Pass the path directly
                )
            else:
                 # Fallback, wenn .image nicht das erwartete PIL-Objekt ist oder Pillow fehlt
                 print("WARNUNG: Konnte Bild nicht als PIL-Objekt interpretieren. Zeige Text-Repräsentation.")
                 yield gr.ChatMessage(role="assistant", content=f"**Final answer (Image Object):** {str(final_answer)}")

        except Exception as e:
            print(f"FEHLER beim Verarbeiten/Anzeigen des Bildes: {e}")
            # Fallback zur Textanzeige bei Fehlern
            yield gr.ChatMessage(role="assistant", content=f"**Final answer (Error displaying Image):** {str(final_answer)}")

    elif isinstance(final_answer, AgentAudio):
        # Übergib den Pfad direkt als content (konsistent)
        try:
            # Annahme: final_answer.to_string() gibt den Pfad zurück
            audio_path = final_answer.to_string()
            if os.path.exists(audio_path): # Prüfen, ob der Pfad existiert
                 yield gr.ChatMessage(
                     role="assistant",
                     content=audio_path,
                 )
            else:
                 print(f"WARNUNG: Audio-Pfad '{audio_path}' nicht gefunden. Zeige Text-Repräsentation.")
                 yield gr.ChatMessage(role="assistant", content=f"**Final answer (Audio Object):** {str(final_answer)}")
        except Exception as e:
             print(f"FEHLER beim Verarbeiten/Anzeigen von Audio: {e}")
             yield gr.ChatMessage(role="assistant", content=f"**Final answer (Error displaying Audio):** {str(final_answer)}")

    else:
        # Fallback für andere Typen
        yield gr.ChatMessage(role="assistant", content=f"**Final answer:** {str(final_answer)}")


class GradioUI:
    """A one-line interface to launch your agent in Gradio"""

    def __init__(self, agent: MultiStepAgent, file_upload_folder: str | None = None):
        if not _is_package_available("gradio"):
            raise ModuleNotFoundError(
                "Please install 'gradio' extra to use the GradioUI: `pip install 'smolagents[gradio]'`"
            )
        self.agent = agent
        self.file_upload_folder = file_upload_folder
        if self.file_upload_folder is not None:
            # Erstelle Ordner, wenn er nicht existiert
            os.makedirs(self.file_upload_folder, exist_ok=True)


    def interact_with_agent(self, prompt, messages):
        import gradio as gr

        messages.append(gr.ChatMessage(role="user", content=prompt))
        yield messages # Yield die Liste von ChatMessage Objekten

        # Verwende einen temporären Ordner für generierte Bilder, falls keiner angegeben ist
        temp_image_dir = os.path.join(tempfile.gettempdir(), "gradio_agent_images")
        os.makedirs(temp_image_dir, exist_ok=True)

        # Iteriere durch die Nachrichten vom Agenten
        for msg in stream_to_gradio(self.agent, task=prompt, reset_agent_memory=False):
            messages.append(msg)
            yield messages # Yield die Liste von ChatMessage Objekten
        yield messages # Yield die Liste von ChatMessage Objekten am Ende

    # --- (Rest der Klasse GradioUI bleibt unverändert bis launch) ---
    def upload_file(
        self,
        file,
        file_uploads_log,
        allowed_file_types=[
            "application/pdf",
            "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
            "text/plain",
        ],
    ):
        """
        Handle file uploads, default allowed types are .pdf, .docx, and .txt
        """
        import gradio as gr

        if file is None:
            return gr.Textbox("No file uploaded", visible=True), file_uploads_log

        try:
            mime_type, _ = mimetypes.guess_type(file.name)
        except Exception as e:
            return gr.Textbox(f"Error: {e}", visible=True), file_uploads_log

        if mime_type not in allowed_file_types:
            return gr.Textbox("File type disallowed", visible=True), file_uploads_log

        # Sanitize file name
        original_name = os.path.basename(file.name)
        sanitized_name = re.sub(
            r"[^\w\-.]", "_", original_name
        )  # Replace any non-alphanumeric, non-dash, or non-dot characters with underscores

        type_to_ext = {}
        for ext, t in mimetypes.types_map.items():
            if t not in type_to_ext:
                type_to_ext[t] = ext

        # Ensure the extension correlates to the mime type
        sanitized_name = sanitized_name.split(".")[:-1]
        sanitized_name.append("" + type_to_ext[mime_type])
        sanitized_name = "".join(sanitized_name)

        # Ensure the upload folder exists
        if self.file_upload_folder:
             os.makedirs(self.file_upload_folder, exist_ok=True)
             # Save the uploaded file to the specified folder
             file_path = os.path.join(self.file_upload_folder, os.path.basename(sanitized_name))
             shutil.copy(file.name, file_path)
             return gr.Textbox(f"File uploaded: {file_path}", visible=True), file_uploads_log + [file_path]
        else:
            # Handle case where no upload folder is specified (optional)
            return gr.Textbox("File upload folder not configured.", visible=True), file_uploads_log


    def log_user_message(self, text_input, file_uploads_log):
        return (
            text_input
            + (
                f"\nYou have been provided with these files, which might be helpful or not: {file_uploads_log}"
                if len(file_uploads_log) > 0
                else ""
            ),
            "",
        )

    def launch(self, **kwargs):
        import gradio as gr

        with gr.Blocks(fill_height=True) as demo:
            stored_messages = gr.State([])
            file_uploads_log = gr.State([])

            # --- *** HIER IST DIE ÄNDERUNG *** ---
            # Füge type="messages" zur Chatbot-Initialisierung hinzu
            chatbot = gr.Chatbot(
                label="Agent",
                type="messages", # Explizit das neue Format verwenden
                elem_id="chatbot",
                bubble_full_width=False,
                avatar_images=(
                    None,
                    "[https://huggingface.co/datasets/huggingface/brand-assets/resolve/main/hf-logo-round-with-padding.png](https://huggingface.co/datasets/huggingface/brand-assets/resolve/main/hf-logo-round-with-padding.png)"
                ),
                render=False
            )
            # --- *** ENDE DER ÄNDERUNG *** ---

            # If an upload folder is provided, enable the upload feature
            if self.file_upload_folder is not None:
                with gr.Row():
                     upload_file = gr.File(label="Upload a file", scale=1)
                     upload_status = gr.Textbox(label="Upload Status", interactive=False, visible=False, scale=2)

                upload_file.change(
                    self.upload_file,
                    [upload_file, file_uploads_log],
                    [upload_status, file_uploads_log],
                )

            with gr.Row():
                text_input = gr.Textbox(
                    lines=1,
                    label="Chat Message",
                    placeholder="Type your message here...",
                    scale=4
                )
                # submit_button = gr.Button("Send", scale=1)

            chatbot.render()

            submit_action = text_input.submit(
                self.log_user_message,
                [text_input, file_uploads_log],
                [stored_messages, text_input],
            ).then(
                self.interact_with_agent,
                [stored_messages, chatbot],
                [chatbot]
            )

            # submit_button.click(
            #     self.log_user_message,
            #     [text_input, file_uploads_log],
            #     [stored_messages, text_input],
            # ).then(
            #     self.interact_with_agent,
            #     [stored_messages, chatbot],
            #     [chatbot]
            # )

        demo.launch(debug=True, share=False, inline=False, **kwargs)


__all__ = ["stream_to_gradio", "GradioUI"]