import streamlit as st
import os
import tempfile
from io import BytesIO
from fpdf import FPDF
import requests
from stl import mesh
from pathlib import Path

# Directly assign the Groq API key (without using secrets)
GROQ_API_KEY = "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"
GROQ_API_URL = "https://api.groq.com/v1/query"

# Function to generate a technical report using the AI model (Groq API)
def generate_report(cad_data):
    # Making the API request to Groq API
    headers = {
        "Authorization": f"Bearer {GROQ_API_KEY}",
        "Content-Type": "application/json"
    }

    payload = {
        "model": "llama-3.3-70b-versatile",
        "input": cad_data,
        "output_format": "text"
    }

    response = requests.post(GROQ_API_URL, headers=headers, json=payload)

    if response.status_code == 200:
        return response.json()['generated_text']
    else:
        st.error(f"Error in report generation: {response.text}")
        return "Error generating report."

# Function to parse STL CAD files using pySTL
def parse_stl_file(file_path):
    # Load the STL file and extract basic information
    cad_mesh = mesh.Mesh.from_file(file_path)
    
    # Example: Get the number of faces and volume
    num_faces = cad_mesh.vectors.shape[0]
    volume = cad_mesh.get_mass_properties()[0]  # Get volume from mass properties
    
    cad_data = f"Extracted information from {file_path.name}:\n - Number of Faces: {num_faces}\n - Volume: {volume} cubic units."
    return cad_data

# Function to create a PDF report
def create_pdf_report(report_text):
    pdf = FPDF()
    pdf.set_auto_page_break(auto=True, margin=15)
    pdf.add_page()
    
    # Set title and content
    pdf.set_font("Arial", style="B", size=16)
    pdf.cell(200, 10, txt="Technical Report for CAD Analysis", ln=True, align="C")
    
    pdf.ln(10)  # Line break
    pdf.set_font("Arial", size=12)
    pdf.multi_cell(0, 10, report_text)
    
    # Save PDF to a file
    temp_file = tempfile.NamedTemporaryFile(delete=False, suffix=".pdf")
    pdf.output(temp_file.name)
    
    return temp_file.name

# Streamlit UI
st.title("CAD File Analysis and Technical Report Generation")

# File uploader
uploaded_file = st.file_uploader("Upload a CAD file", type=["stl"])

if uploaded_file is not None:
    # Ensure the temporary directory exists
    temp_dir = tempfile.mkdtemp()

    # Save uploaded file temporarily
    temp_file_path = Path(temp_dir) / uploaded_file.name  # Use the temporary directory
    with open(temp_file_path, "wb") as f:
        f.write(uploaded_file.getbuffer())

    # Parse the STL file and extract relevant data
    cad_data = parse_stl_file(temp_file_path)

    if cad_data:
        # Display extracted data as a preview
        st.write("Extracted Data from CAD File:")
        st.text(cad_data)

        # Generate report using Groq API
        report_text = generate_report(cad_data)
        st.write("Generated Report:")
        st.text(report_text)

        # Create a PDF report
        pdf_file_path = create_pdf_report(report_text)

        # Provide a download link for the PDF report
        with open(pdf_file_path, "rb") as f:
            pdf_bytes = f.read()
            st.download_button(
                label="Download Technical Report",
                data=pdf_bytes,
                file_name="technical_report.pdf",
                mime="application/pdf"
            )
else:
    st.write("Please upload a CAD file to begin.")