app.py

import gradio as gr
from analyze_email_main import analyze
from weasyprint import HTML
import tempfile

def html_to_pdf(html_content):
    """Convert HTML string to a temporary PDF file and return its path."""
    with tempfile.NamedTemporaryFile(delete=False, suffix=".pdf") as tmp_pdf:
        HTML(string=html_content).write_pdf(tmp_pdf.name)
        return tmp_pdf.name

def analyze_email(file_path, export_pdf=False):
    if file_path is None:
        return "<p style='color:red;'>Please upload a .eml file to analyze.</p>", None

    # Get structured results
    summary, details = analyze(file_path)

    # Safely extract summary fields
    attack_score = summary.get("Attack Score", 0)
    try:
        score_val = int(round(float(attack_score)))
    except Exception:
        score_val = 0
    if score_val > 100:
        score_val = 100
    if score_val < 0:
        score_val = 0

    attack_type = summary.get("Attack Type", "Unknown")
    verdict = summary.get("Final Verdict", "No Verdict")

    # Verdict color
    verdict_color = "#2ecc71"
    v_lower = verdict.lower()
    if "malicious" in v_lower:
        verdict_color = "#e74c3c"
    elif "suspicious" in v_lower:
        verdict_color = "#e67e22"
    elif "spam" in v_lower:
        verdict_color = "#f1c40f"

    # Collect details safely
    header_findings = details.get("Header Findings", []) or []
    body_findings = details.get("Body Findings", []) or []
    url_findings = details.get("URL Findings", []) or []
    highlighted_body = details.get("Highlighted Body", "") or ""

    # Tags (from summary Main Tags if present)
    main_tags_str = summary.get("Main Tags", "")
    tags = [t.strip() for t in main_tags_str.split(",")] if main_tags_str else []

    # HTML Report
    html = f"""
    <div style='font-family: Arial, sans-serif; padding: 20px; max-width: 900px; margin:auto;'>
      <h2 style="color:#2c3e50;">📧 Email Security Report</h2>

      <h3 style="margin-bottom:6px;">Attack Score</h3>
      <div style="background:#ecf0f1; border-radius:10px; overflow:hidden; height:24px; width:100%; margin-bottom:8px;">
        <div style="width:{score_val}%; background:#3498db; height:100%; text-align:center; color:white; line-height:24px;">
          {score_val}/100
        </div>
      </div>

      <p><b>Attack Type:</b> {attack_type}</p>
      <p><b>Final Verdict:</b> <span style="background:{verdict_color}; color:white; padding:4px 10px; border-radius:6px;">
        {verdict}
      </span></p>

      <details style="margin-top:15px;" open>
        <summary>🔖 Attack Analysis Tags ({len(tags)})</summary>
        {"<ul>" + "".join(f"<li>{tag}</li>" for tag in tags if tag) + "</ul>" if tags else "<p>No special tags</p>"}
      </details>

      <details style="margin-top:15px;" open>
        <summary>🕵️ Detailed Findings</summary>
        <h4>Headers ({len(header_findings)})</h4>
        {"<ul>" + "".join(f"<li>{f}</li>" for f in header_findings) + "</ul>" if header_findings else "<p>No header findings.</p>"}

        <h4>Body ({len(body_findings)})</h4>
        {"<ul>" + "".join(f"<li>{f}</li>" for f in body_findings) + "</ul>" if body_findings else "<p>No body findings.</p>"}

        <h4>URLs ({len(url_findings)})</h4>
        {"<ul>" + "".join(f"<li>{f}</li>" for f in url_findings) + "</ul>" if url_findings else "<p>No URL findings.</p>"}
      </details>

      <details style="margin-top:15px;">
        <summary>📩 Highlighted Email Body</summary>
        <div style='border:1px solid #ccc; padding:15px; background:#fdfdfd; border-radius:8px; white-space:pre-wrap;'>
          {highlighted_body}
        </div>
      </details>
    </div>
    """

    pdf_path = None
    if export_pdf:
        try:
            pdf_path = html_to_pdf(html)
        except Exception as e:
            html += f"<p style='color:#c0392b;'><b>PDF export failed:</b> {e}</p>"

    return html, pdf_path

# Gradio Interface
demo = gr.Interface(
    fn=analyze_email,
    inputs=[
        gr.File(label="Upload .eml File", type="filepath"),
        gr.Checkbox(label="Export PDF Report")
    ],
    outputs=[
        gr.HTML(label="Analysis Report"),
        gr.File(label="Download PDF Report")
    ],
    title="📧 Email Security Analyzer",
    description="Upload an .eml file to detect phishing, spam, or malicious emails. "
                "Check 'Export PDF Report' to download a professional PDF report."
)


demo.launch()