import os import logging from typing import Dict, List, Optional from functools import lru_cache import re import gradio as gr try: # Assuming vector_db.py exists in the same directory or is installed from vector_db import VectorDatabase except ImportError: print("Error: Could not import VectorDatabase from vector_db.py.") print("Please ensure vector_db.py exists in the same directory and is correctly defined.") # Exit if critical dependency is missing at import time exit(1) try: from langchain_openai import ChatOpenAI except ImportError: print("Error: langchain-openai not found. Please install it: pip install langchain-openai") # Exit if critical dependency is missing at import time exit(1) from langchain.prompts import PromptTemplate from langchain.chains import LLMChain # Suppress warnings for cleaner console output import warnings warnings.filterwarnings("ignore", category=SyntaxWarning) warnings.filterwarnings("ignore", category=UserWarning, message=".*You are using gradio version.*") warnings.filterwarnings("ignore", category=DeprecationWarning) # Enhanced logging configuration logging.basicConfig( level=logging.INFO, format='%(asctime)s - %(levelname)s - [%(filename)s:%(lineno)d] - %(message)s' ) # --- RAGSystem Class (Processing Logic - KEPT INTACT AS REQUESTED) --- class RAGSystem: def __init__(self, vector_db: Optional[VectorDatabase] = None): logging.info("Initializing RAGSystem") self.vector_db = vector_db if vector_db else VectorDatabase() self.llm = None self.chain = None self.prompt_template_str = """You are a legal assistant specializing in tenant rights and landlord-tenant laws. Your goal is to provide accurate, detailed, and helpful answers grounded in legal authority. Use the provided statutes as the primary source when available. If no relevant statutes are found in the context, rely on your general knowledge to provide a pertinent and practical response, clearly indicating when you are doing so and prioritizing state-specific information over federal laws for state-specific queries. Instructions: * Use the context and statutes as the primary basis for your answer when available. * For state-specific queries, prioritize statutes or legal principles from the specified state over federal laws. * Cite relevant statutes (e.g., (AS § 34.03.220(a)(2))) explicitly in your answer when applicable. * If multiple statutes apply, list all relevant ones. * If no specific statute is found in the context, state this clearly (e.g., 'No specific statute was found in the provided context'), then provide a general answer based on common legal principles or practices, marked as such. * Include practical examples or scenarios to enhance clarity and usefulness. * Use bullet points or numbered lists for readability when appropriate. * Maintain a professional and neutral tone. Question: {query} State: {state} Statutes from context: {statutes} Context information: --- START CONTEXT --- {context} --- END CONCONTEXT --- Answer:""" self.prompt_template = PromptTemplate( input_variables=["query", "context", "state", "statutes"], template=self.prompt_template_str ) logging.info("RAGSystem initialized.") def extract_statutes(self, text: str) -> str: statute_pattern = r'\b(?:[A-Z]{2,}\.?\s+(?:Rev\.\s+)?Stat\.?|Code(?:\s+Ann\.?)?|Ann\.?\s+Laws|Statutes|CCP|USC|ILCS|Civ\.\s+Code|Penal\s+Code|Gen\.\s+Oblig\.\s+Law|R\.?S\.?|P\.?L\.?)\s+§\s*[\d\-]+(?:\.\d+)?(?:[\(\w\.\)]+)?|Title\s+\d+\s+USC\s+§\s*\d+(?:-\d+)?\b' statutes = re.findall(statute_pattern, text, re.IGNORECASE) valid_statutes = [] for statute in statutes: statute = statute.strip() if '§' in statute and any(char.isdigit() for char in statute): if not re.match(r'^\([\w\.]+\)$', statute) and 'http' not in statute: if len(statute) > 5: valid_statutes.append(statute) if valid_statutes: seen = set() unique_statutes = [s for s in valid_statutes if not (s.rstrip('.,;') in seen or seen.add(s.rstrip('.,;')))] logging.info(f"Extracted {len(unique_statutes)} unique statutes.") return "\n".join(f"- {s}" for s in unique_statutes) logging.info("No statutes found matching the pattern in the context.") return "No specific statutes found in the provided context." @lru_cache(maxsize=50) def process_query_cached(self, query: str, state: str, openai_api_key: str, n_results: int = 5) -> Dict[str, any]: logging.info(f"Processing query (cache key: '{query}'|'{state}'|key_hidden) with n_results={n_results}") if not state or state == "Select a state..." or "Error" in state: logging.warning("No valid state provided for query.") return {"answer": "
Error: Please select a valid state.
", "context_used": "N/A - Invalid Input"} if not query or not query.strip(): logging.warning("No query provided.") return {"answer": "
Error: Please enter your question.
", "context_used": "N/A - Invalid Input"} if not openai_api_key or not openai_api_key.strip() or not openai_api_key.startswith("sk-"): logging.warning("No valid OpenAI API key provided.") return {"answer": "
Error: Please provide a valid OpenAI API key (starting with 'sk-'). Get one from OpenAI.
", "context_used": "N/A - Invalid Input"} try: logging.info("Initializing temporary LLM and Chain for this query...") temp_llm = ChatOpenAI( temperature=0.2, openai_api_key=openai_api_key, model_name="gpt-3.5-turbo", max_tokens=1500, request_timeout=45 ) temp_chain = LLMChain(llm=temp_llm, prompt=self.prompt_template) logging.info("Temporary LLM and Chain initialized successfully.") except Exception as e: logging.error(f"LLM Initialization failed: {str(e)}", exc_info=True) error_msg = "Error: Failed to initialize AI model. Please check your network connection and API key validity." if "authentication" in str(e).lower(): error_msg = "Error: OpenAI API Key is invalid or expired. Please check your key." return {"answer": f"
{error_msg}
Details: {str(e)}
", "context_used": "N/A - LLM Init Failed"} context = "No relevant context found." statutes_from_context = "Statute retrieval skipped due to context issues." try: logging.info(f"Querying Vector DB for query: '{query[:50]}...' in state '{state}'...") results = self.vector_db.query(query, state=state, n_results=n_results) logging.info(f"Vector DB query successful for state '{state}'. Processing results...") context_parts = [] doc_results = results.get("document_results", {}) docs = doc_results.get("documents", [[]])[0] metadatas = doc_results.get("metadatas", [[]])[0] if docs and metadatas and len(docs) == len(metadatas): logging.info(f"Found {len(docs)} document chunks.") for i, doc_content in enumerate(docs): metadata = metadatas[i] state_label = metadata.get('state', 'Unknown State') chunk_id = metadata.get('chunk_id', 'N/A') context_parts.append(f"**Source: Document Chunk {chunk_id} (State: {state_label})**\n{doc_content}") state_results_data = results.get("state_results", {}) state_docs = state_results_data.get("documents", [[]])[0] state_metadatas = state_results_data.get("metadatas", [[]])[0] if state_docs and state_metadatas and len(state_docs) == len(state_metadatas): logging.info(f"Found {len(state_docs)} state summary documents.") for i, state_doc_content in enumerate(state_docs): metadata = state_metadatas[i] state_label = metadata.get('state', state) context_parts.append(f"**Source: State Summary (State: {state_label})**\n{state_doc_content}") if context_parts: context = "\n\n---\n\n".join(context_parts) logging.info(f"Constructed context with {len(context_parts)} parts. Length: {len(context)} chars.") try: statutes_from_context = self.extract_statutes(context) except Exception as e: logging.error(f"Error extracting statutes: {e}", exc_info=True) statutes_from_context = "Error extracting statutes from context." else: logging.warning("No relevant context parts found from vector DB query.") context = "No relevant context could be retrieved from the knowledge base for this query and state. The AI will answer from its general knowledge." statutes_from_context = "No specific statutes found as no context was retrieved." except Exception as e: logging.error(f"Vector DB query/context processing failed: {str(e)}", exc_info=True) context = f"Warning: Error retrieving documents from the knowledge base ({str(e)}). The AI will attempt to answer from its general knowledge, which may be less specific or accurate." statutes_from_context = "Statute retrieval skipped due to error retrieving context." try: logging.info("Invoking LLMChain with constructed input...") llm_input = {"query": query, "context": context, "state": state, "statutes": statutes_from_context} answer_dict = temp_chain.invoke(llm_input) answer_text = answer_dict.get('text', '').strip() if not answer_text: logging.warning("LLM returned an empty answer.") answer_text = "
⚠️The AI model returned an empty response. This might be due to the query, context limitations, or temporary issues. Please try rephrasing your question or try again later.
" else: logging.info("LLM generated answer successfully.") return {"answer": answer_text, "context_used": context} except Exception as e: logging.error(f"LLM processing failed: {str(e)}", exc_info=True) error_message = "Error: AI answer generation failed." details = f"Details: {str(e)}" if "authentication" in str(e).lower(): error_message = "Error: Authentication failed. Please double-check your OpenAI API key." details = "" elif "rate limit" in str(e).lower(): error_message = "Error: You've exceeded your OpenAI API rate limit or quota. Please check your usage and plan limits, or wait and try again." details = "" elif "context length" in str(e).lower(): error_message = "Error: The request was too long for the AI model. This can happen with very complex questions or extensive retrieved context." details = "Try simplifying your question or asking about a more specific aspect." elif "timeout" in str(e).lower(): error_message = "Error: The request to the AI model timed out. The service might be busy." details = "Please try again in a few moments." formatted_error = f"
❌{error_message}
" if details: formatted_error += f"
{details}
" return {"answer": formatted_error, "context_used": context} def process_query(self, query: str, state: str, openai_api_key: str, n_results: int = 5) -> Dict[str, any]: return self.process_query_cached(query.strip(), state, openai_api_key.strip(), n_results) def get_states(self) -> List[str]: try: states = self.vector_db.get_states() if not states: logging.warning("No states retrieved from vector_db. Returning empty list.") return [] valid_states = sorted(list(set(s for s in states if s and isinstance(s, str) and s != "Select a state..."))) logging.info(f"Retrieved {len(valid_states)} unique, valid states from VectorDatabase.") return valid_states except Exception as e: logging.error(f"Failed to get states from VectorDatabase: {str(e)}", exc_info=True) return ["Error: Could not load states"] def load_pdf(self, pdf_path: str) -> int: if not os.path.exists(pdf_path): logging.error(f"PDF file not found at path: {pdf_path}") raise FileNotFoundError(f"PDF file not found: {pdf_path}") try: logging.info(f"Attempting to load/verify data from PDF: {pdf_path}") # Assuming process_and_load_pdf is part of VectorDatabase and correctly implemented num_states_processed = self.vector_db.process_and_load_pdf(pdf_path) doc_count = self.vector_db.document_collection.count() state_count = self.vector_db.state_collection.count() total_items = doc_count + state_count if total_items > 0: logging.info(f"Vector DB contains {total_items} items ({doc_count} docs, {state_count} states). PDF processed or data already existed.") current_states = self.get_states() return len(current_states) if current_states and "Error" not in current_states[0] else 0 else: logging.warning(f"PDF processing completed, but the vector database appears empty. Check PDF content and processing logs.") return 0 except Exception as e: logging.error(f"Failed to load or process PDF '{pdf_path}': {str(e)}", exc_info=True) raise RuntimeError(f"Failed to process PDF '{pdf_path}': {e}") from e # --- GRADIO INTERFACE (NEW UI DESIGN) --- def gradio_interface(self): def query_interface_wrapper(api_key: str, query: str, state: str) -> str: # Basic client-side validation for immediate feedback (redundant but good UX) if not api_key or not api_key.strip() or not api_key.startswith("sk-"): return "
⚠️Please provide a valid OpenAI API key (starting with 'sk-'). Get one free from OpenAI.
" if not state or state == "Select a state..." or "Error" in state: return "
⚠️Please select a valid state from the dropdown.
" if not query or not query.strip(): return "
⚠️Please enter your question in the text box.
" # Call the core processing logic result = self.process_query(query=query, state=state, openai_api_key=api_key) answer = result.get("answer", "
⚠️An unexpected error occurred.
") # Check if the answer already contains an error message (from deeper within process_query) if "
" in answer: # Error messages are returned directly as they contain their own styling return answer else: # Wrap successful response in a div with an animation class formatted_response_content = f"
📜Response for {state}
{answer}" return f"
{formatted_response_content}
" try: available_states_list = self.get_states() # Ensure "Select a state..." is always the first option dropdown_choices = ["Select a state..."] + (available_states_list if available_states_list and "Error" not in available_states_list[0] else ["Error: States unavailable"]) initial_value = dropdown_choices[0] # Set initial value to the prompt except Exception: # Catch-all for safety dropdown_choices = ["Error: Critical failure loading states"] initial_value = dropdown_choices[0] # Define example queries, filtering based on available states example_queries_base = [ ["What are the rules for security deposit returns?", "California"], ["Can a landlord enter my apartment without notice?", "New York"], ["My landlord hasn't made necessary repairs. What can I do?", "Texas"], ["How much notice must a landlord give to raise rent?", "Florida"], ["What is an implied warranty of habitability?", "Illinois"] ] example_queries = [] if available_states_list and "Error" not in available_states_list[0] and len(available_states_list) > 0: loaded_states_set = set(available_states_list) # Filter for examples whose state is in the loaded states example_queries = [ex for ex in example_queries_base if ex[1] in loaded_states_set] # Add a generic example if no specific state examples match or if list is empty if not example_queries: # Add one example using the first available state, or a common one if no states example_queries.append(["What basic rights do tenants have?", available_states_list[0] if available_states_list else "California"]) else: # Fallback if states list is problematic (e.g., empty or error) example_queries.append(["What basic rights do tenants have?", "California"]) # Custom CSS for better UI design, clear boundaries, and text alignment for HuggingFace custom_css = """ /* Import legible fonts from Google Fonts */ @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Poppins:wght@600;700;800&display=swap'); /* Root variables for consistent theming - adjusted for an inviting orange palette */ :root { --primary-color: #FF8C00; /* Darker Orange for buttons/accents */ --primary-hover: #E07B00; /* Slightly darker orange for hover */ --background-primary: #FFF8F0; /* Very light cream/off-white for main cards, inputs, output area */ --background-secondary: #FDEBD9; /* Slightly darker cream for overall app background, table headers, placeholder */ --text-primary: #4A3C32; /* Dark warm brown/charcoal for main text */ --text-secondary: #8C7B6F; /* Muted warm gray/brown for secondary text */ --border-color: #DDC6AF; /* Light, desaturated orange-brown for borders */ --border-focus: #FF8C00; /* Focus color matches primary */ --shadow-sm: 0 1px 3px rgba(0,0,0,0.08); --shadow-md: 0 4px 10px rgba(0,0,0,0.1); --shadow-lg: 0 10px 20px rgba(0,0,0,0.15); --error-bg: #FFF0E0; /* Light orange-pink for errors */ --error-border: #FFD2B2; /* Medium orange-pink for error borders */ --error-text: #E05C00; /* Darker, strong orange-red for error text */ } /* Dark mode variables - for consistency if a dark mode toggle were present */ body.dark { --primary-color: #FFA500; /* Bright orange for dark mode */ --primary-hover: #CC8400; --background-primary: #2C2C2C; /* Dark charcoal */ --background-secondary: #1F1F1F; /* Even darker charcoal */ --text-primary: #F0F0F0; --text-secondary: #B0B0B0; --border-color: #555555; --border-focus: #FFA500; --error-bg: #400000; --error-border: #800000; --error-text: #FF6666; } /* Ensure the very outer background is also set, overriding any Gradio defaults */ body, html { background-color: var(--background-secondary) !important; } /* Base container improvements */ .gradio-container { max-width: 900px !important; /* Slightly smaller for focused content */ margin: 0 auto !important; /* Center the whole app */ padding: 1.5rem !important; font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif !important; background-color: var(--background-secondary) !important; /* Overall background of the container */ box-shadow: none !important; /* Remove default gradio container shadow */ } /* Ensure all main content sections have primary background */ .main-dashboard-container > * { background-color: var(--background-primary) !important; } /* Header styling - centered and prominent */ .app-header-wrapper { background: linear-gradient(135deg, var(--background-primary) 0%, var(--background-secondary) 100%) !important; border: 2px solid var(--border-color) !important; border-radius: 16px !important; padding: 2.5rem 1.5rem !important; /* More vertical padding */ margin-bottom: 1.5rem !important; text-align: center !important; /* Center text within header */ box-shadow: var(--shadow-md) !important; position: relative; /* For potential pseudo-element effects */ overflow: hidden; /* For any overflow animations */ } .app-header-wrapper::before { /* Subtle background pattern for dynamism */ content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: radial-gradient(circle at top left, rgba(255,140,0,0.05) 0%, transparent 40%), radial-gradient(circle at bottom right, rgba(255,140,0,0.05) 0%, transparent 40%); z-index: 0; opacity: 0.8; pointer-events: none; } .app-header-logo { font-size: 4.5rem !important; /* Larger icon */ margin-bottom: 0.75rem !important; display: block !important; color: var(--primary-color) !important; /* Theme color */ position: relative; z-index: 1; /* Bring icon to front of pseudo-element */ /* Animation for dynamism */ animation: float-icon 3s ease-in-out infinite alternate; } /* Keyframes for floating icon */ @keyframes float-icon { 0% { transform: translateY(0px); } 50% { transform: translateY(-5px); } 100% { transform: translateY(0px); } } .app-header-title { font-family: 'Poppins', sans-serif !important; font-size: 3rem !important; /* Even larger title */ font-weight: 800 !important; /* Bolder */ color: var(--text-primary) !important; margin: 0 0 0.75rem 0 !important; line-height: 1.1 !important; letter-spacing: -0.03em !important; /* Tighter spacing */ position: relative; z-index: 1; } .app-header-tagline { font-size: 1.25rem !important; /* Slightly larger tagline */ color: var(--text-secondary) !important; font-weight: 400 !important; margin: 0 !important; max-width: 700px; /* Constrain tagline width */ margin-left: auto; margin-right: auto; position: relative; z-index: 1; } /* Main container with consistent spacing */ .main-dashboard-container { display: flex !important; flex-direction: column !important; gap: 1.25rem !important; /* Consistent spacing between cards */ } /* Card sections with clear boundaries (boundeyes) and subtle dynamic effects */ .dashboard-card-section { background-color: var(--background-primary) !important; /* Explicitly set background */ border: 2px solid var(--border-color) !important; /* Distinct border */ border-radius: 12px !important; padding: 1.75rem !important; /* Consistent padding */ box-shadow: var(--shadow-sm) !important; /* Subtle shadow */ transition: all 0.3s ease-out !important; /* Smoother transition */ cursor: default; /* Indicate not directly clickable (unless examples) */ } .dashboard-card-section:hover { box-shadow: var(--shadow-md) !important; transform: translateY(-3px) !important; /* More pronounced lift */ } /* Centered section titles with improved typography */ .sub-section-title { font-family: 'Poppins', sans-serif !important; font-size: 1.7rem !important; /* Slightly larger */ font-weight: 700 !important; /* Bolder */ color: var(--text-primary) !important; text-align: center !important; /* Centered text */ margin: 0 0 1.25rem 0 !important; /* More space below title */ padding-bottom: 0.75rem !important; border-bottom: 2px solid var(--border-color) !important; /* Underline effect */ display: block !important; letter-spacing: -0.01em !important; } /* Specific styling for the welcome/disclaimer markdown content */ .dashboard-card-section p { line-height: 1.7 !important; color: var(--text-primary) !important; font-size: 1rem !important; text-align: left !important; /* Ensure content text is left-aligned */ } .dashboard-card-section strong { color: var(--primary-color) !important; /* Highlight strong text with primary color */ } /* Improved input styling with clear boundaries and focus */ .gradio-textbox, .gradio-dropdown { margin-bottom: 0.75rem !important; } .gradio-textbox textarea, .gradio-textbox input, .gradio-dropdown > div > input[type="text"], /* Target dropdown input for custom values */ .gradio-dropdown .primary-wrap, /* Target dropdown wrapper */ .gradio-dropdown .scroll-hide /* Target dropdown list container for consistency */ { background-color: var(--background-primary) !important; /* Explicitly set background to primary cream */ border: 2px solid var(--border-color) !important; /* Clear border */ border-radius: 8px !important; padding: 0.85rem 1rem !important; /* Slightly more padding */ font-size: 0.98rem !important; font-family: 'Inter', sans-serif !important; color: var(--text-primary) !important; /* Text color inside inputs */ transition: border-color 0.2s ease, box-shadow 0.2s ease !important; /* Smooth transitions */ box-shadow: var(--shadow-sm) !important; } .gradio-textbox textarea:focus, .gradio-textbox input:focus, .gradio-dropdown > div > input[type="text"]:focus, .gradio-dropdown .primary-wrap.focused { /* Apply focus style to dropdown wrap */ outline: none !important; border-color: var(--border-focus) !important; /* Distinct border on focus */ box-shadow: 0 0 0 4px rgba(255, 140, 0, 0.2) !important; /* Broader, softer glow on focus */ } /* Label styling for better readability */ .gradio-textbox label, .gradio-dropdown label { font-weight: 600 !important; /* Bolder labels */ color: var(--text-primary) !important; font-size: 1rem !important; margin-bottom: 0.6rem !important; display: block !important; } /* Info text styling below inputs */ .gradio-textbox .gr-form, .gradio-dropdown .gr-form { font-size: 0.9rem !important; color: var(--text-secondary) !important; margin-top: 0.4rem !important; /* More space for info text */ } /* Input row layout improvements */ .input-row { display: flex !important; gap: 1.25rem !important; /* Consistent gap between query and state */ margin-bottom: 0.5rem !important; } .input-field { flex: 1 !important; } /* Button styling improvements with active state for dynamism */ .button-row { display: flex !important; gap: 1rem !important; justify-content: flex-end !important; /* Align buttons to the right */ margin-top: 1.5rem !important; /* More space above buttons */ } .gradio-button { padding: 0.85rem 1.8rem !important; /* More padding for bigger buttons */ border-radius: 9px !important; /* Slightly more rounded */ font-weight: 600 !important; /* Bolder text */ font-size: 1rem !important; transition: all 0.2s ease-out !important; /* Smooth transition for hover/active */ cursor: pointer !important; border: 2px solid transparent !important; text-align: center !important; /* Ensure button text is centered */ } .gr-button-primary { background-color: var(--primary-color) !important; /* Explicitly set background */ color: white !important; box-shadow: var(--shadow-sm) !important; } .gr-button-primary:hover { background-color: var(--primary-hover) !important; /* Explicitly set background */ box-shadow: var(--shadow-md) !important; transform: translateY(-2px) !important; /* Subtle lift effect on hover */ } .gr-button-primary:active { /* Press down effect on click */ transform: translateY(1px) !important; box-shadow: none !important; } .gr-button-secondary { background-color: transparent !important; /* Explicitly set background */ color: var(--text-primary) !important; border-color: var(--border-color) !important; } .gr-button-secondary:hover { background-color: var(--background-secondary) !important; /* Explicitly set background */ border-color: var(--primary-color) !important; transform: translateY(-2px) !important; } .gr-button-secondary:active { /* Press down effect on click */ transform: translateY(1px) !important; box-shadow: none !important; } /* Output styling with clear boundaries (boundeyes are clear) and dynamic fade-in */ .output-content-wrapper { background-color: var(--background-primary) !important; /* Explicitly set background */ border: 2px solid var(--border-color) !important; /* Clear border */ border-radius: 8px !important; padding: 1.5rem !important; min-height: 150px !important; /* More space for output */ color: var(--text-primary) !important; /* Ensure the inner animated content fits well */ display: flex; flex-direction: column; justify-content: center; /* Center content vertically if small */ align-items: center; /* Center content horizontally if small */ } /* The div holding the actual response content, enabling fade-in animation */ .animated-output-content { opacity: 0; animation: fadeInAndSlideUp 0.7s ease-out forwards; /* More pronounced animation */ width: 100%; /* Take full width of parent */ /* Preserve formatting within the animated content */ white-space: pre-wrap; overflow-wrap: break-word; word-break: break-word; text-align: left !important; /* Ensure text is left-aligned within this div */ } @keyframes fadeInAndSlideUp { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } } .response-header { font-size: 1.3rem !important; font-weight: 700 !important; color: var(--primary-color) !important; /* Matches primary color */ margin-bottom: 0.75rem !important; display: flex !important; align-items: center !important; gap: 0.6rem !important; text-align: left !important; /* Ensure header itself is not affected by parent centering */ width: 100%; /* Take full width */ justify-content: flex-start; /* Align content to the start */ } .response-icon { font-size: 1.5rem !important; color: var(--primary-color) !important; } .divider { border: none !important; border-top: 1px dashed var(--border-color) !important; /* Dashed divider for visual separation */ margin: 1rem 0 !important; } /* Error message styling */ .error-message { background-color: var(--error-bg) !important; /* Explicitly set background */ border: 2px solid var(--error-border) !important; color: var(--error-text) !important; padding: 1.25rem !important; border-radius: 8px !important; display: flex !important; align-items: flex-start !important; gap: 0.8rem !important; font-size: 0.95rem !important; font-weight: 500 !important; line-height: 1.6 !important; text-align: left !important; /* Ensure error message text is left aligned */ width: 100%; /* Take full width of parent */ box-sizing: border-box; /* Include padding/border in width */ } .error-message a { color: var(--error-text) !important; text-decoration: underline !important; } .error-icon { font-size: 1.4rem !important; line-height: 1 !important; margin-top: 0.1rem !important; } .error-details { font-size: 0.85rem !important; color: var(--error-text) !important; margin-top: 0.5rem !important; opacity: 0.8; } /* Placeholder styling for empty output */ .placeholder { background-color: var(--background-secondary) !important; /* Explicitly set background */ border: 2px dashed var(--border-color) !important; border-radius: 8px !important; padding: 2.5rem 1.5rem !important; text-align: center !important; /* Ensure placeholder text is centered */ color: var(--text-secondary) !important; font-style: italic !important; font-size: 1.1rem !important; width: 100%; /* Ensure it takes full width of parent */ box-sizing: border-box; /* Include padding/border in width */ } /* Examples table styling with dynamic hover */ .examples-section .gr-samples-table { border: 2px solid var(--border-color) !important; border-radius: 8px !important; overflow: hidden !important; margin-top: 1rem !important; } .examples-section .gr-samples-table th, .examples-section .gr-samples-table td { padding: 0.9rem !important; border: none !important; font-size: 0.95rem !important; text-align: left !important; /* Ensure example text is left-aligned */ } .examples-section .gr-samples-table th { background-color: var(--background-secondary) !important; /* Explicitly set background */ font-weight: 700 !important; color: var(--text-primary) !important; } .examples-section .gr-samples-table td { background-color: var(--background-primary) !important; /* Explicitly set background */ color: var(--text-primary) !important; border-top: 1px solid var(--border-color) !important; cursor: pointer !important; transition: background 0.2s ease, transform 0.1s ease !important; /* Smooth transitions */ } .examples-section .gr-samples-table tr:hover td { background-color: var(--background-secondary) !important; /* Explicitly set background */ transform: translateX(5px); /* Subtle slide on hover */ } /* Hide Gradio default elements for examples for cleaner look */ .gr-examples .gr-label, .gr-examples .label-wrap, .gr-examples .gr-accordion-header { display: none !important; } /* Footer styling - centered text */ .app-footer-wrapper { background-color: var(--background-secondary) !important; /* Explicitly set background */ border: 2px solid var(--border-color) !important; border-radius: 12px !important; padding: 1.75rem !important; margin-top: 1.5rem !important; margin-bottom: 1.5rem !important; /* Ensures space at the very bottom before the container padding */ text-align: center !important; /* Centered footer text */ } .app-footer p { margin: 0.6rem 0 !important; font-size: 0.95rem !important; color: var(--text-secondary) !important; line-height: 1.6 !important; } .app-footer a { color: var(--primary-color) !important; text-decoration: none !important; font-weight: 600 !important; } .app-footer a:hover { text-decoration: underline !important; } /* Responsive design for smaller screens */ @media (max-width: 768px) { .gradio-container { padding: 1rem !important; } .app-header-title { font-size: 2.2rem !important; } .app-header-tagline { font-size: 1rem !important; } .sub-section-title { font-size: 1.4rem !important; } .input-row { flex-direction: column !important; /* Stack inputs vertically */ } .button-row { flex-direction: column !important; /* Stack buttons vertically */ } .gradio-button { width: 100% !important; /* Full width buttons */ } .dashboard-card-section { padding: 1.25rem !important; } .output-content-wrapper { min-height: 120px !important; } .placeholder { padding: 1.5rem 1rem !important; font-size: 1rem !important; } } """ # Using gr.Blocks with custom CSS only to ensure no blue colors are inherited from a theme. with gr.Blocks(css=custom_css, title="Landlord-Tenant Rights Assistant") as demo: # Header Section - uses gr.Group for distinct card-like styling with gr.Group(elem_classes="app-header-wrapper"): # Markdown used for flexible styling and auto-centering via CSS gr.Markdown( """

Landlord-Tenant Rights Assistant

Empowering You with State-Specific Legal Insights

""" ) # Main Dashboard Container - acts as a column to stack various sections with gr.Column(elem_classes="main-dashboard-container"): # Introduction and Disclaimer Card with gr.Group(elem_classes="dashboard-card-section"): gr.Markdown("

Welcome & Disclaimer

") # Centered by CSS gr.Markdown( """ Navigate landlord-tenant laws with ease. This assistant provides detailed, state-specific answers grounded in legal authority. **Disclaimer:** This tool is for informational purposes only and does not constitute legal advice. For specific legal guidance, always consult a licensed attorney in your jurisdiction. """ ) # OpenAI API Key Input Card with gr.Group(elem_classes="dashboard-card-section"): gr.Markdown("

OpenAI API Key

") # Centered by CSS api_key_input = gr.Textbox( label="API Key", type="password", # Hides the input for security placeholder="Enter your OpenAI API key (e.g., sk-...)", info="Required to process your query. Get one from OpenAI: platform.openai.com/api-keys", lines=1, elem_classes=["input-field-group"] # Custom class for input styling ) # Query Input and State Selection Card with gr.Group(elem_classes="dashboard-card-section"): gr.Markdown("

Ask Your Question

") # Centered by CSS with gr.Row(elem_classes="input-row"): # Row for side-by-side query and state with gr.Column(elem_classes="input-field", scale=3): # Query text area takes more space query_input = gr.Textbox( label="Your Question", placeholder="E.g., What are the rules for security deposit returns in my state?", lines=4, max_lines=8, elem_classes=["input-field-group"] ) with gr.Column(elem_classes="input-field", scale=1): # State dropdown takes less space state_input = gr.Dropdown( label="Select State", choices=dropdown_choices, value=initial_value, allow_custom_value=False, elem_classes=["input-field-group"] ) with gr.Row(elem_classes="button-row"): # Row for action buttons clear_button = gr.Button("Clear", variant="secondary", elem_classes=["gr-button-secondary"]) submit_button = gr.Button("Submit Query", variant="primary", elem_classes=["gr-button-primary"]) # Output Display Card - Using gr.HTML for better animation control with gr.Group(elem_classes="dashboard-card-section"): gr.Markdown("

Legal Assistant's Response

") # Centered by CSS output = gr.HTML( # Changed to gr.HTML to wrap content with animation class value="
The answer will appear here after submitting your query.
", elem_classes="output-content-wrapper" # Custom class for output styling ) # Example Questions Section with gr.Group(elem_classes="dashboard-card-section examples-section"): gr.Markdown("

Example Questions

") # Centered by CSS if example_queries: gr.Examples( examples=example_queries, inputs=[query_input, state_input], examples_per_page=5, label="" # Hide default Gradio label for examples to use our custom title ) else: gr.Markdown("
Sample questions could not be loaded. Please ensure the vector database is populated.
") # Footer Section - contains disclaimer and developer info with gr.Group(elem_classes="app-footer-wrapper"): gr.Markdown( """ This tool is for informational purposes only and does not constitute legal advice. For legal guidance, always consult with a licensed attorney in your jurisdiction. Developed by **Nischal Subedi**. Connect on [LinkedIn](https://www.linkedin.com/in/nischal1/) or explore insights at [Substack](https://datascientistinsights.substack.com/). """ ) # Event Listeners for buttons submit_button.click( fn=query_interface_wrapper, inputs=[api_key_input, query_input, state_input], outputs=output, api_name="submit_query" # Useful for debugging / external calls ) clear_button.click( fn=lambda: ( "", # Clear API key input "", # Clear query input initial_value, # Reset state dropdown to default prompt "
Inputs cleared. Ready for your next question.
" # Reset output message ), inputs=[], outputs=[api_key_input, query_input, state_input, output] ) return demo # --- Main Execution Block (UNCHANGED from original logic) --- if __name__ == "__main__": logging.info("Starting Landlord-Tenant Rights Bot application...") try: SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__)) DEFAULT_PDF_PATH = os.path.join(SCRIPT_DIR, "tenant-landlord.pdf") DEFAULT_DB_PATH = os.path.join(SCRIPT_DIR, "chroma_db") PDF_PATH = os.getenv("PDF_PATH", DEFAULT_PDF_PATH) VECTOR_DB_PATH = os.getenv("VECTOR_DB_PATH", DEFAULT_DB_PATH) # Ensure vector DB directory exists before initialization os.makedirs(os.path.dirname(VECTOR_DB_PATH), exist_ok=True) logging.info(f"Attempting to load PDF from: {PDF_PATH}") if not os.path.exists(PDF_PATH): logging.error(f"FATAL: PDF file not found at the specified path: {PDF_PATH}") print(f"\n--- CONFIGURATION ERROR ---\nPDF file ('{os.path.basename(PDF_PATH)}') not found at: {PDF_PATH}.\nPlease ensure it exists or set 'PDF_PATH' environment variable.\n---------------------------\n") exit(1) # Correctly exits if PDF is not found if not os.access(PDF_PATH, os.R_OK): logging.error(f"FATAL: PDF file at '{PDF_PATH}' exists but is not readable. Check file permissions.") print(f"\n--- PERMISSION ERROR ---\nPDF file ('{os.path.basename(PDF_PATH)}') found but not readable at: {PDF_PATH}\nPlease check file permissions (e.g., using 'chmod +r' in terminal).\n---------------------------\n") exit(1) # Correctly exits if PDF is unreadable logging.info(f"PDF file '{os.path.basename(PDF_PATH)}' found and is readable.") # Initialize VectorDatabase and RAGSystem vector_db_instance = VectorDatabase(persist_directory=VECTOR_DB_PATH) rag = RAGSystem(vector_db=vector_db_instance) # Load PDF data into the vector DB (or verify it's already loaded) rag.load_pdf(PDF_PATH) # Get the Gradio interface object app_interface = rag.gradio_interface() SERVER_PORT = int(os.getenv("PORT", 7860)) # Use PORT env var for Hugging Face Spaces logging.info(f"Launching Gradio app on http://0.0.0.0:{SERVER_PORT}") print(f"\n--- Gradio App Running ---\nAccess at: http://localhost:{SERVER_PORT} or your public Spaces URL\n--------------------------\n") app_interface.launch(server_name="0.0.0.0", server_port=SERVER_PORT, share=False) # share=False is typical for Spaces except ModuleNotFoundError as e: if "vector_db" in str(e): logging.error(f"FATAL: Could not import VectorDatabase. Ensure 'vector_db.py' is in the same directory and 'chromadb', 'langchain', 'pypdf', 'sentence-transformers' are installed.", exc_info=True) print(f"\n--- MISSING DEPENDENCY OR FILE ---\nCould not find/import 'vector_db.py' or one of its dependencies.\nError: {e}\nPlease ensure 'vector_db.py' is present and all required packages (chromadb, langchain, pypdf, sentence-transformers, etc.) are in your requirements.txt and installed.\n---------------------------\n") else: logging.error(f"Application startup failed due to a missing module: {str(e)}", exc_info=True) print(f"\n--- FATAL STARTUP ERROR - MISSING MODULE ---\n{str(e)}\nPlease ensure all dependencies are installed.\nCheck logs for more details.\n---------------------------\n") exit(1) except FileNotFoundError as e: logging.error(f"Application startup failed due to a missing file: {str(e)}", exc_info=True) print(f"\n--- FATAL STARTUP ERROR - FILE NOT FOUND ---\n{str(e)}\nPlease ensure the file exists at the specified path.\nCheck logs for more details.\n---------------------------\n") exit(1) except Exception as e: logging.error(f"Application startup failed: {str(e)}", exc_info=True) print(f"\n--- FATAL STARTUP ERROR ---\n{str(e)}\nCheck logs for more details.\n---------------------------\n") exit(1)