app.py

import streamlit as st
import requests
from fpdf import FPDF
import os
import time
from datetime import datetime
import groq

# API keys (replace with your keys or use environment variables)
mistral_api_key = os.getenv("MISTRAL_API_KEY", "gz6lDXokxgR6cLY72oomALWcm7vhjRzQ")
groq_api_key = os.getenv("GROQ_API_KEY", "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")

# Initialize Groq client
groq_client = groq.Client(api_key=groq_api_key)

# Function to call Mistral API
def call_mistral_api(prompt):
    url = "https://api.mistral.ai/v1/chat/completions"
    headers = {
        "Authorization": f"Bearer {mistral_api_key}",
        "Content-Type": "application/json"
    }
    payload = {
        "model": "mistral-medium",
        "messages": [
            {"role": "user", "content": prompt}
        ]
    }
    try:
        response = requests.post(url, headers=headers, json=payload)
        response.raise_for_status()
        return response.json()['choices'][0]['message']['content']
    except requests.exceptions.HTTPError as err:
        if response.status_code == 429:
            st.warning("Rate limit exceeded. Please wait a few seconds and try again.")
            time.sleep(5)
            return call_mistral_api(prompt)
        return f"HTTP Error: {err}"
    except Exception as err:
        return f"Error: {err}"

# Function to call Groq API
def call_groq_api(prompt):
    try:
        response = groq_client.chat.completions.create(
            model="llama3-70b-8192",
            messages=[
                {"role": "user", "content": prompt}
            ]
        )
        return response.choices[0].message.content
    except Exception as err:
        st.error(f"Error: {err}")
        return f"Error: {err}"

# Function to analyze a single requirement
def analyze_requirement(requirement):
    # Use Mistral for classification and domain identification
    type_prompt = f"Classify the following requirement as Functional or Non-Functional in one word:\n\n{requirement}\n\nType:"
    req_type = call_mistral_api(type_prompt).strip()

    domain_prompt = f"Classify the domain for the following requirement in one word (e.g., E-commerce, Education, etc.):\n\n{requirement}\n\nDomain:"
    domain = call_mistral_api(domain_prompt).strip()

    # Use Groq for defect analysis and rewriting
    defects_prompt = f"""List ONLY the major defects in the following requirement as comma-separated values (1-2 words each). Valid options: Ambiguity, Vagueness, Incompleteness, Volatility, Unverifiability. Do NOT add explanations:
    {requirement}
    Defects:"""
    defects = defects.split(":")[-1].strip() if ":" in defects else defects
    defects = defects.replace("Defects", "").strip()

    rewritten_prompt = f"""Rewrite the following requirement in 1-2 sentences to address defects. Start directly with "The project shall..." without preamble:
    {requirement}
    Improved:"""
    rewritten = rewritten.split(":")[-1].strip() if ":" in rewritten else rewritten
    rewritten = rewritten.replace("Rewritten", "").replace("Improved", "").strip()

    return {
        "Requirement": requirement,
        "Type": req_type,
        "Domain": domain,
        "Defects": defects,
        "Rewritten": rewritten
    }

# Function to generate a PDF report
def generate_pdf_report(results):
    pdf = FPDF()
    pdf.add_page()
    pdf.set_font("Arial", size=12)

    # Add watermark
    pdf.set_font("Arial", 'B', 50)
    pdf.set_text_color(230, 230, 230)
    pdf.rotate(45)
    pdf.text(60, 150, "AI Powered Requirement Analysis")
    pdf.rotate(0)

    # Add title and date/time
    pdf.set_font("Arial", 'B', 16)
    pdf.set_text_color(0, 0, 0)
    pdf.cell(200, 10, txt="AI Powered Requirement Analysis and Defect Detection", ln=True, align='C')
    pdf.set_font("Arial", size=12)
    pdf.cell(200, 10, txt=f"Report Generated on: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}", ln=True, align='C')
    pdf.ln(10)

    # Add requirements analysis
    pdf.set_font("Arial", size=12)
    for i, result in enumerate(results, start=1):
        if pdf.get_y() > 250:
            pdf.add_page()
            pdf.set_font("Arial", 'B', 16)
            pdf.cell(200, 10, txt="AI Powered Requirement Analysis and Defect Detection", ln=True, align='C')
            pdf.set_font("Arial", size=12)
            pdf.cell(200, 10, txt=f"Report Generated on: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}", ln=True, align='C')
            pdf.ln(10)

        pdf.set_font("Arial", 'B', 14)
        pdf.multi_cell(200, 10, txt=f"Requirement R{i}: {result['Requirement']}", align='L')
        pdf.set_font("Arial", size=12)
        pdf.multi_cell(200, 10, txt=f"Type: {result['Type']}", align='L')
        pdf.multi_cell(200, 10, txt=f"Domain: {result['Domain']}", align='L')
        pdf.multi_cell(200, 10, txt=f"Defects: {result['Defects']}", align='L')
        pdf.multi_cell(200, 10, txt=f"Rewritten: {result['Rewritten']}", align='L')
        pdf.multi_cell(200, 10, txt="-" * 50, align='L')
        pdf.ln(5)

    pdf_output = "requirements_report.pdf"
    pdf.output(pdf_output)
    return pdf_output

# Custom CSS for professional styling
st.markdown("""
    <style>
        .main {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        }
        .stApp {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }
        .header {
            text-align: center;
            padding: 2rem;
            background: white;
            border-radius: 15px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            margin-bottom: 2rem;
            border: 1px solid #e0e0e0;
        }
        .requirement-card {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
            margin-bottom: 1.5rem;
            transition: transform 0.2s;
            color: #333333;
            
        }
        .requirement-card:hover {
            transform: translateY(-3px);
        }
        .analysis-badge {
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 500;
            margin: 0.3rem;
        }
        .defect-badge { 
            white-space: nowrap;
            margin: 0.2rem 0.3rem !important;
        }
        .improved-badge {
            line-height: 1.5;
            text-align: left;
            width: 100%;
        }
        .download-btn {
            width: 100%;
            padding: 1rem;
            font-size: 1.1rem;
            margin-top: 2rem;
        }
        .type-functional { background: #e8f5e9; color: #2e7d32; }
        .type-non-functional { background: #fff3e0; color: #ef6c00; }
        .defect-badge { background: #ffebee; color: #c62828; }
        .improved-badge { background: #e3f2fd; color: #1565c0; }
    </style>
""", unsafe_allow_html=True)

def main():
    # Professional Header Section
    with st.container():
        st.markdown('<div class="header">', unsafe_allow_html=True)
        st.title("📝 AI-Powered Requirement Analysis System")
        st.markdown("""
            <div style="margin: 1.5rem 0;">
                <div style="font-size: 1.2rem; color: #4a4a4a;">Automated Requirement Classification, Defect Detection & Optimization</div>
                <div style="display: flex; justify-content: center; gap: 1rem; margin: 1rem 0;">
                    <div style="padding: 0.5rem 1rem; background: #f0f2f6;color: black; border-radius: 20px;">Team: Sadia, Areeba, Rabbia, Tesmia</div>
                    <div style="padding: 0.5rem 1rem; background: #f0f2f6; color: black; border-radius: 20px;">Mistral + Groq API</div>
                </div>
            </div>
        """, unsafe_allow_html=True)
        st.markdown('</div>', unsafe_allow_html=True)

    # Input Section
    with st.container():
        st.subheader("📥 Input Requirements")
        input_text = st.text_area(
            "Enter your software requirements (one per line or separated by periods):",
            height=200,
            placeholder="Example:\nThe system shall allow users to reset their password via email verification.\nThe interface must load within 2 seconds of user interaction...",
            help="Enter each requirement on a new line or separate with periods."
        )

    # Analysis Section
    if st.button("🚀 Start Analysis", type="primary", use_container_width=True):
        if not input_text.strip():
            st.warning("⚠️ Please enter requirements to analyze")
        else:
            with st.spinner("🔍 Analyzing requirements..."):
                requirements = [req.strip() for req in input_text.replace("\n", ".").split(".") if req.strip()]
                results = []
                
                progress_bar = st.progress(0)
                for i, req in enumerate(requirements):
                    results.append(analyze_requirement(req))
                    progress_bar.progress((i+1)/len(requirements))
                
                st.success("✅ Analysis Completed!")
                time.sleep(0.5)
                st.session_state.results = results

    # Display Results
    if 'results' in st.session_state:
        st.subheader("📊 Analysis Results")
        with st.container():
            for i, result in enumerate(st.session_state.results, 1):
                with st.expander(f"Requirement #{i}: {result['Requirement'][:50]}...", expanded=True):
                    st.markdown(f"""
                        <div class="requirement-card">
                            <div style="margin-bottom: 1.5rem;">
                                <div class="analysis-badge { 'type-functional' if 'functional' in result['Type'].lower() else 'type-non-functional' }">
                                    📌 Type: {result['Type']}
                                </div>
                                <div class="analysis-badge" style="background: #e8eaf6; color: #303f9f;">
                                    🏷️ Domain: {result['Domain']}
                                </div>
                            </div>
                            
                            <div style="margin: 1rem 0;">
                                <h4>🔎 Identified Issues</h4>
                                <div style="display: flex; gap: 0.5rem; flex-wrap: wrap;">
                                    {''.join([f'<div class="analysis-badge defect-badge">⚠️ {d}</div>' 
                                            for d in result['Defects'].split(', ') if d.strip()])
                                </div>
                            </div>
                            
                            <div style="margin: 1rem 0;">
                                <h4>✨ Improved Version</h4>
                                <div class="analysis-badge improved-badge">
                                    📝 {result['Rewritten']}
                                </div>
                            </div>
                        </div>
                    """, unsafe_allow_html=True)

        # PDF Report Section
        st.subheader("📤 Generate Report")
        with st.container():
            col1, col2 = st.columns([3, 2])
            with col1:
                st.info("💡 Click below to generate a comprehensive PDF report with all analysis details")
            with col2:
                if st.button("📄 Generate PDF Report", type="secondary", use_container_width=True):
                    with st.spinner("Generating PDF..."):
                        pdf_report = generate_pdf_report(st.session_state.results)
                        with open(pdf_report, "rb") as f:
                            st.download_button(
                                label="⬇️ Download Full Report",
                                data=f,
                                file_name="Requirement_Analysis_Report.pdf",
                                mime="application/pdf",
                                use_container_width=True,
                                type="primary"
                            )

    # Footer
    st.markdown("---")
    st.markdown("""
        <div style="text-align: center; color: #666; margin-top: 3rem;">
            <p>AI-Powered Requirement Analysis System • Final Year Project • Computer Science Department</p>
            <p>🚀 Powered by Mistral AI & Groq • 🛠️ Developed by Team Four</p>
        </div>
    """, unsafe_allow_html=True)

if __name__ == "__main__":
    main()