app.py

import gradio as gr
from huggingface_hub import HfApi
from huggingface_hub.utils import HfHubHTTPError, RepositoryNotFoundError
import os
import uuid

# --- State Management and API Client ---

def get_hf_api(token):
    """Initializes the HfApi client. Allows read-only operations if no token is provided."""
    return HfApi(token=token if token else None)

# --- UI Functions ---

def handle_token_change(token):
    """
    Called when the token is entered. Fetches user info and updates UI interactivity.
    """
    if not token:
        # No token, disable write actions and clear user-specific info
        update_dict = {
            manage_files_btn: gr.update(interactive=False),
            delete_repo_btn: gr.update(interactive=False),
            commit_btn: gr.update(interactive=False),
            author_input: gr.update(value=""),
            whoami_output: gr.update(value=None, visible=False)
        }
        return (None, "", *update_dict.values())

    try:
        api = get_hf_api(token)
        user_info = api.whoami()
        username = user_info.get('name')
        
        # Token is valid, enable write actions and set author
        update_dict = {
            manage_files_btn: gr.update(interactive=True),
            delete_repo_btn: gr.update(interactive=True),
            commit_btn: gr.update(interactive=True),
            author_input: gr.update(value=username),
            whoami_output: gr.update(value=user_info, visible=True)
        }
        return (token, username, *update_dict.values())

    except HfHubHTTPError as e:
        gr.Warning(f"Invalid Token: {e}. You can only perform read-only actions.")
        update_dict = {
            manage_files_btn: gr.update(interactive=False),
            delete_repo_btn: gr.update(interactive=False),
            commit_btn: gr.update(interactive=False),
            whoami_output: gr.update(value=None, visible=False)
        }
        return (token, "", *update_dict.values())


def list_repos(token, author, repo_type):
    """Lists repositories for a given author and type."""
    if not author:
        gr.Info("Please enter an author (username or organization) to list repositories.")
        return gr.update(choices=[], value=None), gr.update(visible=False), gr.update(visible=False)
    try:
        api = get_hf_api(token)
        # Use the dedicated list functions for clarity e.g. api.list_models, api.list_spaces
        list_fn = getattr(api, f"list_{repo_type}s")
        repos = list_fn(author=author)
        repo_ids = [repo.id for repo in repos]
        return gr.update(choices=repo_ids, value=None), gr.update(visible=False), gr.update(visible=False)
    except HfHubHTTPError as e:
        gr.Error(f"Could not list repositories: {e}")
        return gr.update(choices=[], value=None), gr.update(visible=False), gr.update(visible=False)

def handle_repo_selection(repo_id):
    """Called when a repo is selected. Makes action buttons visible."""
    if repo_id:
        return gr.update(visible=True), gr.update(visible=False) # Show actions, hide editor
    return gr.update(visible=False), gr.update(visible=False) # Hide everything

def delete_repo(token, repo_id, repo_type):
    """Deletes the selected repository."""
    if not token:
        gr.Error("A write-enabled Hugging Face token is required to delete a repository.")
        return repo_id, gr.update(visible=True), gr.update(visible=False)
    if not repo_id:
        gr.Warning("No repository selected to delete.")
        return repo_id, gr.update(visible=True), gr.update(visible=False)
    try:
        api = get_hf_api(token)
        api.delete_repo(repo_id=repo_id, repo_type=repo_type)
        gr.Info(f"Successfully deleted '{repo_id}'.")
        return None, gr.update(visible=False), gr.update(visible=False)
    except HfHubHTTPError as e:
        gr.Error(f"Failed to delete repository: {e}")
        return repo_id, gr.update(visible=True), gr.update(visible=False)

# --- File Editor Functions ---

def show_file_manager(token, repo_id, repo_type):
    if not repo_id:
        gr.Warning("No repository selected.")
        return gr.update(visible=False), gr.update(), gr.update(), gr.update()
    try:
        api = get_hf_api(token)
        repo_files = api.list_repo_files(repo_id=repo_id, repo_type=repo_type)
        filtered_files = [f for f in repo_files if not f.startswith('.')]
        return (
            gr.update(visible=True), gr.update(choices=filtered_files, value=None),
            gr.update(value="## Select a file to view or edit.", language='markdown'), ""
        )
    except Exception as e:
        gr.Error(f"Could not list files: {e}")
        return gr.update(visible=False), gr.update(), gr.update(), gr.update()

def load_file_content(token, repo_id, repo_type, filepath):
    if not filepath:
        return gr.update(value="## Select a file to view its content.", language='markdown')
    try:
        api = get_hf_api(token)
        local_path = api.hf_hub_download(repo_id=repo_id, repo_type=repo_type, filename=filepath, token=token)
        with open(local_path, 'r', encoding='utf-8') as f: content = f.read()
        language = os.path.splitext(filepath)[1].lstrip('.').lower()
        if language == 'py': language = 'python'
        if language == 'js': language = 'javascript'
        if language == 'md': language = 'markdown'
        else: language = 'python'
        return gr.update(value=content, language=language)
    except Exception as e:
        return gr.update(value=f"Error loading file: {e}", language='plaintext')

def commit_file(token, repo_id, repo_type, filepath, content, commit_message):
    if not token: gr.Error("A write-enabled token is required."); return
    if not filepath: gr.Warning("No file selected."); return
    if not commit_message: gr.Warning("Commit message cannot be empty."); return
    try:
        api = get_hf_api(token)
        api.upload_file(
            path_or_fileobj=bytes(content, 'utf-8'), path_in_repo=filepath,
            repo_id=repo_id, repo_type=repo_type, commit_message=commit_message,
        )
        gr.Info(f"Successfully committed '{filepath}' to '{repo_id}'!")
    except Exception as e:
        gr.Error(f"Failed to commit file: {e}")

# --- Gradio UI Layout ---
with gr.Blocks(theme=gr.themes.Soft(primary_hue="blue"), title="Hugging Face Hub Toolkit") as demo:
    # State management
    hf_token_state = gr.State(None)
    author_state = gr.State("")
    selected_repo_id = gr.State(None)
    selected_repo_type = gr.State("space") # Default

    gr.Markdown("# Hugging Face Hub Dashboard")
    gr.Markdown("An intuitive interface to manage your Hugging Face repositories. **Enter a write-token for full access.**")

    with gr.Sidebar():
        hf_token = gr.Textbox(label="Hugging Face API Token", type="password", placeholder="hf_...", scale=3)
        whoami_output = gr.JSON(label="Authenticated User", visible=False, scale=1)

    with gr.Row(equal_height=False):
        with gr.Column(scale=1):
            gr.Markdown("### 1. Select a Repository")
            author_input = gr.Textbox(label="Author (Username or Org)", interactive=True)
            repo_selector = gr.Radio(label="Select a Repository", interactive=True, value=None)
            with gr.Tabs() as repo_type_tabs:
                for repo_type, label in [("space", "Spaces"), ("model", "Models"), ("dataset", "Datasets")]:
                    with gr.Tab(label, id=repo_type):
                        btn = gr.Button(f"List {label}")
                        btn.click(
                            fn=list_repos,
                            inputs=[hf_token_state, author_input, gr.State(repo_type)],
                            outputs=[repo_selector, gr.Column(), gr.Column()] # Dummy outputs for panels to hide them
                        ).then(fn=lambda author: author, inputs=author_input, outputs=author_state)
        
        with gr.Column(scale=3):
            with gr.Column(visible=False) as action_panel:
                gr.Markdown("### 2. Choose an Action")
                with gr.Row():
                    manage_files_btn = gr.Button("Manage Files", interactive=False, scale=1)
                    delete_repo_btn = gr.Button("Delete This Repo", variant="stop", interactive=False, scale=1)
            
            with gr.Column(visible=False) as editor_panel:
                gr.Markdown("### 3. Edit Files")
                file_selector = gr.Dropdown(label="Select File", interactive=True)
                code_editor = gr.Code(label="File Content", language="markdown", interactive=True)
                commit_message_input = gr.Textbox(label="Commit Message", placeholder="e.g., Update README.md", interactive=True)
                commit_btn = gr.Button("Commit Changes", variant="primary", interactive=False)

    # --- Event Handlers ---
    hf_token.change(
        fn=handle_token_change, inputs=hf_token,
        outputs=[hf_token_state, author_state, manage_files_btn, delete_repo_btn, commit_btn, author_input, whoami_output]
    )
    repo_type_tabs.select(
        fn=lambda rt: (rt, None, gr.update(choices=[], value=None), gr.update(visible=False), gr.update(visible=False)),
        inputs=repo_type_tabs,
        outputs=[selected_repo_type, selected_repo_id, repo_selector, action_panel, editor_panel]
    )
    repo_selector.select(
        fn=lambda repo_id: (repo_id, *handle_repo_selection(repo_id)),
        inputs=repo_selector, outputs=[selected_repo_id, action_panel, editor_panel]
    )
    manage_files_btn.click(
        fn=show_file_manager, inputs=[hf_token_state, selected_repo_id, selected_repo_type],
        outputs=[editor_panel, file_selector, code_editor, commit_message_input]
    )
    delete_repo_btn.click(
        fn=delete_repo, inputs=[hf_token_state, selected_repo_id, selected_repo_type],
        outputs=[selected_repo_id, action_panel, editor_panel],
        js="() => confirm('Are you sure you want to permanently delete this repository? This action cannot be undone.')"
    ).then(
        # On successful deletion, refresh the repo list.
        # THIS IS THE CORRECTED PART: Pass Gradio components to inputs, not a lambda.
        fn=list_repos,
        inputs=[hf_token_state, author_state, selected_repo_type],
        outputs=[repo_selector, action_panel, editor_panel]
    )
    file_selector.change(
        fn=load_file_content, inputs=[hf_token_state, selected_repo_id, selected_repo_type, file_selector],
        outputs=code_editor
    )
    commit_btn.click(
        fn=commit_file,
        inputs=[hf_token_state, selected_repo_id, selected_repo_type, file_selector, code_editor, commit_message_input]
    )

if __name__ == "__main__":
    demo.launch(debug=False)