import os
import json
import gradio as gr
import pandas as pd
from python_request import process_wod_document

from dummy import output_test

# --- Authentication Function ---
def authenticate_user(username, password):
    """
    Simple authentication function.
    In production, you should use more secure methods like hashed passwords.
    """
    return username == "demo" and password == os.environ["PASSWORD"]

# --- Core Application Logic ---
def analyze_wod(file_obj, wod_type):
    """
    This function analyzes a Work Order Document using the remote API.

    Args:
        file_obj: The uploaded file object from Gradio.
        wod_type: The selected type of Work Order Document.

    Returns:
        A pandas DataFrame with the analysis results.
    """
    # Check if user has selected a valid WOD type
    if wod_type == "-- WOD type --" or wod_type is None:
        # Show warning dialog and return empty DataFrame
        gr.Warning("Please select a WOD type first!")
        return "", pd.DataFrame()
    
    # Check if file is uploaded
    if file_obj is None:
        gr.Warning("Please upload a PDF file first!")
        return "", pd.DataFrame()
    
    print(f"Analyzing '{file_obj.name}' (Type: {wod_type})...")
    
    try:
        # In modern Gradio versions, file_obj is already a path string
        # We can use it directly or get the path from it
        if hasattr(file_obj, 'name') and os.path.isfile(file_obj.name):
            # file_obj has a .name attribute pointing to the temporary file
            temp_file_path = file_obj.name
            cleanup_needed = False
        else:
            # Fallback: assume file_obj is a path string
            temp_file_path = str(file_obj)
            cleanup_needed = False
        
        # Process the document using the API
        api_response = process_wod_document(temp_file_path, wod_type)

        # api_response = json.loads(output_test) 
        
        # Clean up temporary file if we created one
        if cleanup_needed:
            os.unlink(temp_file_path)
        
        # Check if API call was successful
        if api_response.get("status") != "success":
            error_msg = api_response.get("message", "Unknown error occurred")
            gr.Error(f"API Error: {error_msg}")
            return "", pd.DataFrame()
        
        # Parse the API response
        results = api_response.get("results", {})
        summary = results.get("summary", {})
        
        # Convert API response to DataFrame format
        requirements = []
        reasons = []
        statuses = []
        
        for requirement_name, details in summary.items():
            requirements.append(requirement_name)
            reasons.append(details.get("reasoning", ""))
            # Convert true/false to PASS/FAIL
            status_bool = details.get("status", "false")
            if isinstance(status_bool, str):
                status = "PASS" if status_bool.lower() == "true" else "FAIL"
            else:
                status = "PASS" if status_bool else "FAIL"
            statuses.append(status)
        
        # Create DataFrame
        df = pd.DataFrame({
            "Requirement": requirements,
            "Reason": reasons,
            "Status": statuses
        })
        
        # Get prediction for display
        prediction = results.get("prediction", "Unknown")
        gr.Info(f"Analysis completed! Overall prediction: {prediction}")
        
        # Format prediction as centered H1 for display
        prediction_display = f"<h1 style='text-align: center; color: #1f77b4;'>{prediction}</h1>" if prediction != "Unknown" else ""
        
        return prediction_display, df
        
    except Exception as e:
        error_msg = f"Error processing document: {str(e)}"
        print(error_msg)
        gr.Error(error_msg)
        return "", pd.DataFrame()

# --- Gradio User Interface Definition ---
# Using gr.Blocks() for a custom layout that matches the elegant design.
with gr.Blocks(
    #theme=gr.themes.Soft(primary_hue="blue", secondary_hue="sky"), 
    theme=gr.themes.Default(primary_hue="blue", secondary_hue="sky"), 
    css=".gradio-container {max-width: 960px !important; margin: auto !important;}"
) as demo:
    
    # Main Title and Description
    gr.Markdown(
        """
        # WOD Analyzer
        Upload a Work Order Document to automatically check for requirements.
        """
    )

    # Input Section
    with gr.Row():
        # File Upload Component
        file_input = gr.File(label="Upload WOD PDF")
        
        # Dropdown for WOD Type
        type_input = gr.Dropdown(
            ["-- WOD type --", "REPLACEMENT", "THERMAL", "VISIT", "PREVENTIVE_MAINTENANCE", "INSTALLATION", "WITHDRAWAL"],
            label="Type",
            value="-- WOD type --",
            info="Select the type of work order."
        )

    # Action Button
    analyze_btn = gr.Button("Analyze Document", variant="primary")

    # Results Section
    gr.Markdown("---")
    gr.Markdown("## Results")
    
    # Prediction display (centered H1)
    prediction_output = gr.Markdown(value="", visible=True)
    
    # DataFrame to display the output, with styling for the 'Status' column
    results_output = gr.DataFrame(
        headers=["Requirement", "Reason", "Status"],
        datatype=["str", "str", "str"],
        interactive=False,
        max_height=1250,
        column_widths=[30, 60, 10],
        wrap=True
    )

    # Define the interaction: clicking the button calls the function
    analyze_btn.click(
        fn=analyze_wod,
        inputs=[file_input, type_input],
        outputs=[prediction_output, results_output]
    )

# --- Launch the Application with Authentication ---
if __name__ == "__main__":
    # The launch() command creates a web server with authentication enabled
    # Users must provide the correct username and password to access the app

    # demo.launch(debug=True)

    demo.launch(
        auth=authenticate_user,  # Enable authentication
        auth_message="Please enter your credentials to access the WOD Analyzer",
        share=True,
        ssr_mode=False,
    )