app_logic.py

import os
import re
import tempfile
import git
from huggingface_hub import (
    create_repo,
    upload_folder,
    list_repo_files,
    Repository,
    whoami,
)
import logging
from pathlib import Path
from PIL import Image 

try:
    from keylock_decode import decode_from_image_pil
    KEYLOCK_DECODE_AVAILABLE = True
except ImportError:
    KEYLOCK_DECODE_AVAILABLE = False
    decode_from_image_pil = None
    logging.warning("keylock-decode library not found. Image decoding feature will be disabled.")

logging.basicConfig(
    level=logging.INFO, 
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
)
logger = logging.getLogger(__name__)

# --- Helper Function to Get API Token (Unchanged) ---
def _get_api_token(ui_token_from_textbox=None):
    env_token = os.getenv('HF_TOKEN')
    if env_token:
        logger.info("Using HF_TOKEN from environment.")
        return env_token, None
    if ui_token_from_textbox:
        logger.info("Using API token from UI textbox.")
        return ui_token_from_textbox, None
    logger.warning("HF API token not found in environment or UI textbox.")
    return None, "Error: Hugging Face API token not provided. Please enter it in the textbox or load it from an image."

# --- `load_token_from_image_and_set_env` (Unchanged from previous debug version) ---
def load_token_from_image_and_set_env(image_pil_object: Image.Image, password: str):
    if not KEYLOCK_DECODE_AVAILABLE:
        return "Error: KeyLock-Decode library is not installed. This feature is disabled."
    if image_pil_object is None: return "Error: No image provided for decoding."
    if not password: return "Error: Password cannot be empty for image decoding."
    status_messages_display = []
    debug_image_path_str = "Not saved (error or no image)."
    try:
        if image_pil_object:
            original_mode = getattr(image_pil_object, 'mode', 'N/A')
            original_format = getattr(image_pil_object, 'format', 'N/A')
            original_size = getattr(image_pil_object, 'size', 'N/A')
            logger.info(f"Received PIL Image from Gradio. Mode: {original_mode}, Original Format: {original_format}, Size: {original_size}")
            status_messages_display.append(f"[DEBUG] Gradio provided PIL Image - Mode: {original_mode}, Original Format: {original_format}, Size: {original_size}")
            temp_dir = Path(tempfile.gettempdir()) / "gradio_image_debug"
            temp_dir.mkdir(parents=True, exist_ok=True)
            debug_image_path = temp_dir / "image_from_gradio.png"
            image_pil_object.save(debug_image_path, "PNG") 
            debug_image_path_str = str(debug_image_path)
            status_messages_display.append(f"**[DEBUG ACTION REQUIRED]** Image from Gradio saved to: `{debug_image_path_str}`. Try decoding this file with the standalone `keylock-decode` CLI.")
            logger.info(f"Debug image from Gradio saved to: {debug_image_path_str}")
        else:
            status_messages_display.append("[DEBUG] No PIL image object received for debug-saving.")
    except Exception as save_exc:
        logger.exception("Error during debug-saving of image from Gradio:")
        status_messages_display.append(f"[DEBUG] Error saving image for debugging: {str(save_exc)}. Path: {debug_image_path_str}")
    try:
        decoded_data, status_msgs_from_lib = decode_from_image_pil(image_pil_object, password, set_environment_variables=True)
        status_messages_display.extend(status_msgs_from_lib)
        if decoded_data:
            status_messages_display.append("\n**Decoded Data Summary (sensitive values masked):**")
            for key, value in decoded_data.items():
                display_value = '********' if any(k_word in key.upper() for k_word in ['TOKEN', 'KEY', 'SECRET', 'PASS']) else value
                status_messages_display.append(f"- {key}: {display_value}")
            if os.getenv('HF_TOKEN'):
                status_messages_display.append(f"\n**SUCCESS: HF_TOKEN was found and set in environment.**")
            elif 'HF_TOKEN' in decoded_data:
                 status_messages_display.append(f"\nWarning: HF_TOKEN decoded but os.getenv('HF_TOKEN') not found.")
            else:
                status_messages_display.append("\nNote: HF_TOKEN not specifically found in decoded image data.")
    except ValueError as e:
        status_messages_display.append(f"**Decoding Error (e.g., bad password, corrupted data):** {e}")
    except Exception as e:
        status_messages_display.append(f"**An unexpected error occurred during decoding:** {str(e)}")
    return "\n".join(status_messages_display)


# --- Updated `parse_markdown` function ---
def parse_markdown(markdown_input):
    """
    Parse markdown input to extract space details and file structure.
    Correctly handles code blocks by excluding the ``` fences.
    """
    space_info = {"repo_name_md": "", "owner_md": "", "files": []}
    current_file_path = None
    current_file_content_lines = []
    
    # State machine variables
    # in_file_definition: True when we are after "### File: " and before the next "### File: " or end of input.
    # in_code_block: True when we are between ``` and ```.
    in_file_definition = False
    in_code_block = False

    lines = markdown_input.strip().split("\n")

    for line_content_orig in lines:
        line_content_stripped = line_content_orig.strip()

        # Check for new file definition first
        if line_content_stripped.startswith("### File:"):
            # Save previous file's content if any
            if current_file_path and in_file_definition:
                space_info["files"].append({
                    "path": current_file_path,
                    "content": "\n".join(current_file_content_lines)
                })
                current_file_content_lines = [] # Reset for the new file

            current_file_path = line_content_stripped.replace("### File:", "").strip()
            in_file_definition = True
            in_code_block = False # Reset code block state for a new file
            continue # Move to next line, don't process "### File:" as content

        # If we are not in any file definition, skip lines until we find one
        if not in_file_definition:
            if line_content_stripped.startswith("# Space:"): # Parse space name from markdown
                full_space_name_md = line_content_stripped.replace("# Space:", "").strip()
                if "/" in full_space_name_md:
                    space_info["owner_md"], space_info["repo_name_md"] = full_space_name_md.split("/", 1)
                else:
                    space_info["repo_name_md"] = full_space_name_md
            # Other top-level constructs like "## File Structure" can be ignored or parsed if needed
            continue

        # Now, we are definitely within a "### File: ..." block's content area
        
        # Handle code block fences ```
        if line_content_stripped.startswith("```"):
            if in_code_block:
                in_code_block = False # Exiting a code block
            else:
                in_code_block = True  # Entering a code block
            # In either case, we *don't* append the ``` line itself to content
            continue # Move to next line

        # If we are inside a code block OR not (i.e., plain text lines for the file),
        # append the original line (preserving leading/trailing whitespace for that line).
        current_file_content_lines.append(line_content_orig)

    # After loop, append the last file's content if any
    if current_file_path and in_file_definition: # Ensure we were actually defining a file
        space_info["files"].append({
            "path": current_file_path,
            "content": "\n".join(current_file_content_lines)
        })

    # Filter out any entries that might have been added with no path (shouldn't happen with current logic)
    space_info["files"] = [f for f in space_info["files"] if f.get("path")]
    return space_info


# --- `_determine_repo_id` (Unchanged) ---
def _determine_repo_id(ui_api_token_from_textbox, space_name_ui, owner_ui):
    if not space_name_ui: return None, "Error: Space Name cannot be empty."
    if "/" in space_name_ui: return None, "Error: Space Name should not contain '/'. Use Owner field."
    final_owner = owner_ui; error_message = None
    if not final_owner:
        resolved_api_token, token_err = _get_api_token(ui_api_token_from_textbox)
        if token_err: return None, token_err 
        if not resolved_api_token: return None, "Error: API token required for auto owner determination."
        try:
            user_info = whoami(token=resolved_api_token)
            if user_info and 'name' in user_info: final_owner = user_info['name']
            else: error_message = "Error: Could not retrieve username. Check token/permissions or specify Owner."
        except Exception as e: error_message = f"Error retrieving username: {str(e)}. Specify Owner."
        if error_message: return None, error_message
    if not final_owner: return None, "Error: Owner could not be determined."
    return f"{final_owner}/{space_name_ui}", None

# --- Core Functions: `create_space`, `view_space_files`, `update_space_file` (Unchanged) ---
def create_space(ui_api_token_from_textbox, space_name_ui, owner_ui, sdk_ui, markdown_input):
    repo_id_for_error_logging = f"{owner_ui}/{space_name_ui}" if owner_ui else space_name_ui
    try:
        resolved_api_token, token_err = _get_api_token(ui_api_token_from_textbox)
        if token_err: return token_err
        repo_id, err = _determine_repo_id(ui_api_token_from_textbox, space_name_ui, owner_ui)
        if err: return err
        repo_id_for_error_logging = repo_id
        space_info = parse_markdown(markdown_input) # Uses the updated parser
        if not space_info["files"]: return "Error: No files found in markdown. Use '### File: path/to/file.ext'."
        with tempfile.TemporaryDirectory() as temp_dir:
            repo_local_path = Path(temp_dir) / "repo_upload_content"
            repo_local_path.mkdir(exist_ok=True)
            for file_info in space_info["files"]:
                if not file_info.get("path"): continue
                file_path_abs = repo_local_path / file_info["path"]
                file_path_abs.parent.mkdir(parents=True, exist_ok=True)
                with open(file_path_abs, "w", encoding="utf-8") as f: f.write(file_info["content"]) # Content is now clean
            try:
                create_repo(repo_id=repo_id, token=resolved_api_token, repo_type="space", space_sdk=sdk_ui, private=False)
            except Exception as e:
                err_str = str(e).lower()
                if not ("already exists" in err_str or "you already created this repo" in err_str or "exists" in err_str):
                    return f"Error creating Space '{repo_id}': {str(e)}"
            upload_folder(repo_id=repo_id, folder_path=str(repo_local_path), path_in_repo=".", token=resolved_api_token, repo_type="space", commit_message=f"Initial Space setup of {repo_id} via Builder")
            return f"Successfully created/updated Space: [{repo_id}](https://huggingface.co/spaces/{repo_id})"
    except Exception as e:
        logger.exception(f"Error in create_space for {repo_id_for_error_logging}:")
        return f"Error during Space creation/update: {str(e)}"

def view_space_files(ui_api_token_from_textbox, space_name_ui, owner_ui):
    repo_id_for_error_logging = f"{owner_ui}/{space_name_ui}" if owner_ui else space_name_ui
    try:
        resolved_api_token, token_err = _get_api_token(ui_api_token_from_textbox)
        if token_err: return token_err
        repo_id, err = _determine_repo_id(ui_api_token_from_textbox, space_name_ui, owner_ui)
        if err: return err
        repo_id_for_error_logging = repo_id
        files = list_repo_files(repo_id=repo_id, token=resolved_api_token, repo_type="space")
        if files: return f"Files in `{repo_id}`:\n\n" + "\n".join([f"- `{f}`" for f in files])
        return f"No files found in Space `{repo_id}`."
    except Exception as e:
        logger.exception(f"Error in view_space_files for {repo_id_for_error_logging}:")
        return f"Error listing files for `{repo_id_for_error_logging}`: {str(e)}"

def update_space_file(ui_api_token_from_textbox, space_name_ui, owner_ui, file_path_in_repo, file_content, commit_message_ui):
    repo_id_for_error_logging = f"{owner_ui}/{space_name_ui}" if owner_ui else space_name_ui
    try:
        resolved_api_token, token_err = _get_api_token(ui_api_token_from_textbox)
        if token_err: return token_err
        repo_id, err = _determine_repo_id(ui_api_token_from_textbox, space_name_ui, owner_ui)
        if err: return err
        repo_id_for_error_logging = repo_id
        if not file_path_in_repo: return "Error: File Path cannot be empty."
        commit_message_ui = commit_message_ui or f"Update {file_path_in_repo} via Space Builder"
        with tempfile.TemporaryDirectory() as temp_dir:
            repo_local_clone_path = Path(temp_dir) / "cloned_space_repo_for_update"
            cloned_repo = Repository(local_dir=str(repo_local_clone_path), clone_from=f"https://huggingface.co/spaces/{repo_id}", repo_type="space", use_auth_token=resolved_api_token, git_user="Space Builder Bot", git_email="[email protected]")
            full_local_file_path = Path(cloned_repo.local_dir) / file_path_in_repo
            full_local_file_path.parent.mkdir(parents=True, exist_ok=True)
            with open(full_local_file_path, "w", encoding="utf-8") as f: f.write(file_content)
            cloned_repo.push_to_hub(commit_message=commit_message_ui)
            return f"Successfully updated `{file_path_in_repo}` in Space [{repo_id}](https://huggingface.co/spaces/{repo_id})"
    except Exception as e:
        logger.exception(f"Error in update_space_file for {repo_id_for_error_logging}:")
        return f"Error updating file for `{repo_id_for_error_logging}`: {str(e)}"