Update src/streamlit_app.py

src/streamlit_app.py

@@ -1,54 +1,89 @@
-from fastapi import FastAPI, File, UploadFile, Form, HTTPException
-from fastapi.responses import Response, JSONResponse
-from fastapi.middleware.cors import CORSMiddleware
-from typing import List, Optional
+import streamlit as st
+import subprocess
+import os
 import tempfile
 import shutil
-import os
-import subprocess
-import base64
 from pathlib import Path
-import mimetypes
+import base64
+import re
 
-app = FastAPI(
-    title="HTML to PDF API with Image Support",
-    description="Convert HTML to PDF using Puppeteer with image upload support",
-    version="2.0.0"
+st.set_page_config(
+    page_title="HTML to PDF Converter",
+    page_icon="📄",
+    layout="wide"
 )
 
-# Enable CORS
-app.add_middleware(
-    CORSMiddleware,
-    allow_origins=["*"],
-    allow_credentials=True,
-    allow_methods=["*"],
-    allow_headers=["*"],
-)
+def detect_aspect_ratio(html_content):
+    """
+    Detect aspect ratio from HTML content
+    Returns: "16:9", "1:1", or "9:16"
+    """
+    # Check for viewport meta tag
+    viewport_match = re.search(r'<meta[^>]*viewport[^>]*content=["\']([^"\']*)["\']', html_content, re.IGNORECASE)
+    if viewport_match:
+        viewport = viewport_match.group(1).lower()
+        if 'width=device-width' in viewport or 'width=100%' in viewport:
+            # Check for orientation hints
+            if 'orientation=portrait' in viewport:
+                return "9:16"
+            elif 'orientation=landscape' in viewport:
+                return "16:9"
+    
+    # Check for CSS aspect-ratio property
+    aspect_match = re.search(r'aspect-ratio\s*:\s*(\d+)\s*/\s*(\d+)', html_content, re.IGNORECASE)
+    if aspect_match:
+        width = int(aspect_match.group(1))
+        height = int(aspect_match.group(2))
+        ratio = width / height
+        if ratio > 1.5:
+            return "16:9"
+        elif ratio < 0.7:
+            return "9:16"
+        else:
+            return "1:1"
+    
+    # Check for common presentation frameworks
+    if any(keyword in html_content.lower() for keyword in ['reveal.js', 'impress.js', 'slide', 'presentation']):
+        return "16:9"
+    
+    # Check body style for width/height hints
+    body_match = re.search(r'<body[^>]*style=["\']([^"\']*)["\']', html_content, re.IGNORECASE)
+    if body_match:
+        style = body_match.group(1).lower()
+        if 'width' in style and 'height' in style:
+            width_match = re.search(r'width\s*:\s*(\d+)', style)
+            height_match = re.search(r'height\s*:\s*(\d+)', style)
+            if width_match and height_match:
+                w = int(width_match.group(1))
+                h = int(height_match.group(1))
+                ratio = w / h
+                if ratio > 1.5:
+                    return "16:9"
+                elif ratio < 0.7:
+                    return "9:16"
+    
+    # Default to A4 portrait for documents
+    return "9:16"
 
-def save_uploaded_images(images: List[UploadFile], temp_dir: str):
-    """Save uploaded images to temp directory and return mapping"""
+def save_uploaded_images(images, temp_dir):
+    """Save uploaded images and return mapping"""
     image_mapping = {}
     images_dir = os.path.join(temp_dir, "images")
     os.makedirs(images_dir, exist_ok=True)
     
     for image in images:
-        if image.filename:
-            # Save image to temp directory
-            image_path = os.path.join(images_dir, image.filename)
-            with open(image_path, 'wb') as f:
-                content = image.file.read()
-                f.write(content)
-            
-            # Reset file pointer for potential reuse
-            image.file.seek(0)
-            
-            # Create mapping with relative path
-            image_mapping[image.filename] = f"images/{image.filename}"
-            print(f"Saved image: {image.filename} -> {image_path}")
+        # Save image
+        image_path = os.path.join(images_dir, image.name)
+        with open(image_path, 'wb') as f:
+            f.write(image.getvalue())
+        
+        # Create mapping
+        image_mapping[image.name] = f"images/{image.name}"
+        print(f"Saved image: {image.name} -> {image_path}")
     
     return image_mapping
 
-def process_html_with_images(html_content: str, temp_dir: str, image_mapping: dict):
+def process_html_with_images(html_content, temp_dir, image_mapping):
     """Process HTML to handle image references with absolute file paths"""
     import re
     
@@ -58,7 +93,7 @@ def process_html_with_images(html_content: str, temp_dir: str, image_mapping: di
         file_url = f"file://{absolute_path}"
         
         # Replace various image reference patterns
-        # Pattern 1: src="filename"
+        # Pattern 1: src="filename" or src='filename'
         html_content = re.sub(
             rf'src=["\'](?:\./)?{re.escape(original_name)}["\']',
             f'src="{file_url}"',
@@ -66,15 +101,7 @@ def process_html_with_images(html_content: str, temp_dir: str, image_mapping: di
             flags=re.IGNORECASE
         )
         
-        # Pattern 2: src='filename'
-        html_content = re.sub(
-            rf"src=['\"](?:\./)?{re.escape(original_name)}['\"]",
-            f'src="{file_url}"',
-            html_content,
-            flags=re.IGNORECASE
-        )
-        
-        # Pattern 3: background-image: url(filename)
+        # Pattern 2: background-image: url(filename)
         html_content = re.sub(
             rf'url\(["\']?(?:\./)?{re.escape(original_name)}["\']?\)',
             f'url("{file_url}")',
@@ -82,7 +109,7 @@ def process_html_with_images(html_content: str, temp_dir: str, image_mapping: di
             flags=re.IGNORECASE
         )
         
-        # Pattern 4: href for links
+        # Pattern 3: href for links
         html_content = re.sub(
             rf'href=["\'](?:\./)?{re.escape(original_name)}["\']',
             f'href="{file_url}"',
@@ -92,13 +119,134 @@ def process_html_with_images(html_content: str, temp_dir: str, image_mapping: di
     
     return html_content
 
-def convert_html_to_pdf(html_content: str, aspect_ratio: str, temp_dir: str):
-    """Convert HTML content to PDF"""
+def render_html_preview(html_content):
+    """Render HTML preview in an iframe"""
+    # Encode HTML content
+    b64 = base64.b64encode(html_content.encode()).decode()
+    iframe_html = f'<iframe src="data:text/html;base64,{b64}" width="100%" height="600" style="border: 2px solid #ddd; border-radius: 5px;"></iframe>'
+    return iframe_html
+
+def render_pdf_preview(pdf_bytes):
+    """Render PDF preview using embedded PDF.js"""
+    b64 = base64.b64encode(pdf_bytes).decode()
+    
+    pdf_viewer_html = f'''
+    <!DOCTYPE html>
+    <html>
+    <head>
+        <style>
+            body {{
+                margin: 0;
+                padding: 0;
+                overflow: hidden;
+                background: #525659;
+            }}
+            #pdf-container {{
+                width: 100%;
+                height: 100vh;
+                overflow: auto;
+                display: flex;
+                flex-direction: column;
+                align-items: center;
+                padding: 20px;
+                box-sizing: border-box;
+            }}
+            canvas {{
+                box-shadow: 0 2px 8px rgba(0,0,0,0.3);
+                margin-bottom: 10px;
+                background: white;
+            }}
+            #loading {{
+                color: white;
+                font-family: Arial, sans-serif;
+                font-size: 18px;
+                padding: 20px;
+            }}
+            .error {{
+                color: #ff6b6b;
+                font-family: Arial, sans-serif;
+                padding: 20px;
+                background: rgba(0,0,0,0.5);
+                border-radius: 5px;
+                margin: 20px;
+            }}
+        </style>
+    </head>
+    <body>
+        <div id="pdf-container">
+            <div id="loading">Loading PDF...</div>
+        </div>
+        
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
+        <script>
+            pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js';
+            
+            const pdfData = atob('{b64}');
+            const pdfContainer = document.getElementById('pdf-container');
+            const loading = document.getElementById('loading');
+            
+            const uint8Array = new Uint8Array(pdfData.length);
+            for (let i = 0; i < pdfData.length; i++) {{
+                uint8Array[i] = pdfData.charCodeAt(i);
+            }}
+            
+            pdfjsLib.getDocument({{data: uint8Array}}).promise.then(function(pdf) {{
+                loading.style.display = 'none';
+                
+                const numPages = pdf.numPages;
+                const promises = [];
+                
+                for (let pageNum = 1; pageNum <= numPages; pageNum++) {{
+                    promises.push(
+                        pdf.getPage(pageNum).then(function(page) {{
+                            const scale = 1.5;
+                            const viewport = page.getViewport({{scale: scale}});
+                            
+                            const canvas = document.createElement('canvas');
+                            const context = canvas.getContext('2d');
+                            canvas.height = viewport.height;
+                            canvas.width = viewport.width;
+                            
+                            pdfContainer.appendChild(canvas);
+                            
+                            return page.render({{
+                                canvasContext: context,
+                                viewport: viewport
+                            }}).promise;
+                        }})
+                    );
+                }}
+                
+                return Promise.all(promises);
+            }}).catch(function(error) {{
+                loading.innerHTML = '<div class="error">Error loading PDF: ' + error.message + '</div>';
+                console.error('Error loading PDF:', error);
+            }});
+        </script>
+    </body>
+    </html>
+    '''
+    return pdf_viewer_html
+
+def convert_html_to_pdf(html_content, aspect_ratio, temp_dir):
+    """
+    Convert HTML content to PDF using Puppeteer with better styling preservation
+    
+    Args:
+        html_content: String containing HTML content
+        aspect_ratio: One of "16:9", "1:1", or "9:16"
+        temp_dir: Temporary directory for processing
+    
+    Returns:
+        Tuple of (pdf_bytes, error_message)
+    """
     try:
-        # Style injection for better PDF rendering
+        # Inject CSS to preserve styles better
         style_injection = """
         <style>
-            @page { margin: 0; }
+            @page {
+                margin: 0;
+            }
             * {
                 -webkit-print-color-adjust: exact !important;
                 print-color-adjust: exact !important;
@@ -111,6 +259,7 @@ def convert_html_to_pdf(html_content: str, aspect_ratio: str, temp_dir: str):
         </style>
         """
         
+        # Insert style injection before closing head tag or at the start of body
         if '</head>' in html_content:
             html_content = html_content.replace('</head>', style_injection + '</head>')
         elif '<body' in html_content:
@@ -118,247 +267,358 @@ def convert_html_to_pdf(html_content: str, aspect_ratio: str, temp_dir: str):
         else:
             html_content = style_injection + html_content
         
-        # Save HTML to temp file
+        # Save HTML content to temporary file
         html_file = os.path.join(temp_dir, "input.html")
         with open(html_file, 'w', encoding='utf-8') as f:
             f.write(html_content)
         
-        # Get puppeteer script path
+        # Get the path to puppeteer_pdf.js
         script_dir = os.path.dirname(os.path.abspath(__file__))
-        puppeteer_script = os.path.join(script_dir, 'puppeteer_pdf.js')
+        puppeteer_script = os.path.join(os.path.dirname(script_dir), 'puppeteer_pdf.js')
         
-        # Run conversion
+        # Run Node.js script to convert HTML to PDF
         result = subprocess.run(
             ['node', puppeteer_script, html_file, aspect_ratio],
             capture_output=True,
             text=True,
             timeout=60,
-            cwd=script_dir
+            cwd=os.path.dirname(script_dir)
         )
         
         if result.returncode != 0:
-            raise Exception(f"PDF conversion failed: {result.stderr}")
+            return None, f"PDF conversion failed: {result.stderr}"
         
+        # Get the generated PDF path
         pdf_file = html_file.replace('.html', '.pdf')
         
         if not os.path.exists(pdf_file):
-            raise Exception("PDF file was not generated")
+            return None, "PDF file was not generated"
         
+        # Read PDF file into memory
         with open(pdf_file, 'rb') as f:
             pdf_bytes = f.read()
         
-        return pdf_bytes
+        return pdf_bytes, None
         
+    except subprocess.TimeoutExpired:
+        return None, "Error: PDF conversion timed out (60 seconds)"
     except Exception as e:
-        raise e
+        return None, f"Error: {str(e)}"
 
-@app.get("/")
-async def root():
-    """API root endpoint"""
-    return {
-        "message": "HTML to PDF Conversion API with Image Support",
-        "version": "2.0.0",
-        "endpoints": {
-            "POST /convert": "Convert HTML to PDF (file upload with optional images)",
-            "POST /convert-text": "Convert HTML text to PDF (with optional image files)",
-            "POST /convert-with-images": "Convert HTML with multiple images",
-            "GET /health": "Health check",
-            "GET /docs": "API documentation (Swagger UI)"
-        }
-    }
+# Page header
+st.title("📄 HTML to PDF Converter")
+st.markdown("""
+Convert HTML files or HTML code to PDF using Puppeteer with automatic aspect ratio detection.  
+✨ **NEW:** Upload images alongside your HTML files!
+""")
 
-@app.get("/health")
-async def health_check():
-    """Health check endpoint"""
-    return {"status": "healthy", "service": "html-to-pdf-api"}
+# Create tabs
+tab1, tab2 = st.tabs(["📤 Upload HTML File", "📝 Paste HTML Code"])
 
-@app.post("/convert")
-async def convert_file(
-    file: UploadFile = File(...),
-    images: Optional[List[UploadFile]] = File(None),
-    aspect_ratio: str = Form(default="9:16")
-):
-    """
-    Convert uploaded HTML file to PDF with optional images
+# Tab 1: Upload HTML File
+with tab1:
+    uploaded_file = st.file_uploader(
+        "Choose an HTML file",
+        type=['html', 'htm'],
+        key="file_uploader",
+        help="Upload an HTML file (max 200MB)",
+        accept_multiple_files=False
+    )
     
-    - **file**: HTML file to convert
-    - **images**: Optional list of image files (jpg, png, gif, svg, webp)
-    - **aspect_ratio**: Page orientation (16:9, 1:1, or 9:16)
-    """
-    if not file.filename.lower().endswith(('.html', '.htm')):
-        raise HTTPException(status_code=400, detail="File must be HTML (.html or .htm)")
+    # Image uploader
+    uploaded_images = st.file_uploader(
+        "📷 Upload Images (optional)",
+        type=['jpg', 'jpeg', 'png', 'gif', 'svg', 'webp', 'bmp'],
+        key="image_uploader",
+        help="Upload images referenced in your HTML",
+        accept_multiple_files=True
+    )
     
-    if aspect_ratio not in ["16:9", "1:1", "9:16"]:
-        raise HTTPException(status_code=400, detail="Invalid aspect ratio. Use: 16:9, 1:1, or 9:16")
+    if uploaded_images:
+        st.success(f"✅ {len(uploaded_images)} image(s) uploaded")
+        with st.expander("View uploaded images"):
+            cols = st.columns(min(len(uploaded_images), 4))
+            for idx, img in enumerate(uploaded_images):
+                with cols[idx % 4]:
+                    st.image(img, caption=img.name, use_container_width=True)
     
-    temp_dir = None
-    try:
-        # Create temporary directory
-        temp_dir = tempfile.mkdtemp()
+    if uploaded_file is not None:
+        st.success(f"✅ File uploaded: {uploaded_file.name} ({uploaded_file.size:,} bytes)")
         
-        # Read HTML content
-        content = await file.read()
+        # Read file content
+        uploaded_file.seek(0)
         try:
-            html_content = content.decode('utf-8')
+            html_content = uploaded_file.getvalue().decode('utf-8')
         except UnicodeDecodeError:
-            html_content = content.decode('latin-1')
-        
-        # Process images if provided
-        if images:
-            image_mapping = save_uploaded_images(images, temp_dir)
-            html_content = process_html_with_images(html_content, temp_dir, image_mapping)
+            uploaded_file.seek(0)
+            html_content = uploaded_file.getvalue().decode('latin-1')
         
-        # Convert to PDF
-        pdf_bytes = convert_html_to_pdf(html_content, aspect_ratio, temp_dir)
+        # Auto-detect aspect ratio
+        detected_ratio = detect_aspect_ratio(html_content)
         
-        # Clean up
-        shutil.rmtree(temp_dir, ignore_errors=True)
+        col1, col2 = st.columns([1, 1])
         
-        # Return PDF file
-        filename = file.filename.replace('.html', '.pdf').replace('.htm', '.pdf')
-        if not filename.endswith('.pdf'):
-            filename += '.pdf'
+        with col1:
+            st.subheader("⚙️ Settings")
             
-        return Response(
-            content=pdf_bytes,
-            media_type="application/pdf",
-            headers={
-                "Content-Disposition": f"attachment; filename={filename}"
-            }
-        )
+            auto_detect = st.checkbox("Auto-detect aspect ratio", value=True, key="auto_detect_file")
+            
+            if auto_detect:
+                aspect_ratio_file = detected_ratio
+                st.info(f"🔍 Detected: **{detected_ratio}**")
+            else:
+                aspect_ratio_file = st.radio(
+                    "Aspect Ratio",
+                    options=["16:9", "1:1", "9:16"],
+                    index=["16:9", "1:1", "9:16"].index(detected_ratio),
+                    key="aspect_file",
+                    help="Select the page orientation and dimensions"
+                )
+            
+            st.markdown(f"""
+            **Selected: {aspect_ratio_file}**
+            - 16:9 = Landscape (297mm × 210mm)
+            - 1:1 = Square (210mm × 210mm)
+            - 9:16 = Portrait (210mm × 297mm)
+            """)
+            
+            convert_file_btn = st.button("🔄 Convert to PDF", key="convert_file", type="primary", width="stretch")
         
-    except Exception as e:
-        if temp_dir:
-            shutil.rmtree(temp_dir, ignore_errors=True)
-        raise HTTPException(status_code=500, detail=f"Conversion failed: {str(e)}")
+        with col2:
+            st.subheader("👁️ HTML Preview")
+            with st.expander("Show HTML Preview", expanded=False):
+                st.components.v1.html(render_html_preview(html_content), height=600, scrolling=True)
+        
+        # Conversion section
+        if convert_file_btn:
+            temp_dir = None
+            try:
+                with st.spinner("Converting HTML to PDF..."):
+                    # Create temp directory
+                    temp_dir = tempfile.mkdtemp()
+                    
+                    # Process images if uploaded
+                    if uploaded_images:
+                        image_mapping = save_uploaded_images(uploaded_images, temp_dir)
+                        html_content = process_html_with_images(html_content, temp_dir, image_mapping)
+                        st.info(f"📷 Processed {len(uploaded_images)} image(s)")
+                        # Debug info
+                        with st.expander("🔍 Debug: Image Mapping"):
+                            for orig, new in image_mapping.items():
+                                st.text(f"{orig} -> {new}")
+                                full_path = os.path.join(temp_dir, new)
+                                st.text(f"Full path: {full_path}")
+                                st.text(f"Exists: {os.path.exists(full_path)}")
+                    
+                    # Convert to PDF
+                    pdf_bytes, error = convert_html_to_pdf(html_content, aspect_ratio_file, temp_dir)
+                    
+                    # Cleanup
+                    if temp_dir:
+                        shutil.rmtree(temp_dir, ignore_errors=True)
+                    
+                    if error:
+                        st.error(f"❌ {error}")
+                        with st.expander("Show error details"):
+                            st.code(error)
+                    else:
+                        st.success("✅ PDF generated successfully!")
+                        
+                        col_a, col_b = st.columns([1, 1])
+                        
+                        with col_a:
+                            output_filename = uploaded_file.name.replace('.html', '.pdf').replace('.htm', '.pdf')
+                            if not output_filename.endswith('.pdf'):
+                                output_filename += '.pdf'
+                            
+                            st.download_button(
+                                label="⬇️ Download PDF",
+                                data=pdf_bytes,
+                                file_name=output_filename,
+                                mime="application/pdf",
+                                width="stretch",
+                                key="download_file_pdf"
+                            )
+                        
+                        with col_b:
+                            st.info(f"📦 Size: {len(pdf_bytes):,} bytes")
+                        
+                        # PDF Preview
+                        st.subheader("📄 PDF Preview")
+                        st.components.v1.html(render_pdf_preview(pdf_bytes), height=620, scrolling=True)
+            except Exception as e:
+                if temp_dir:
+                    shutil.rmtree(temp_dir, ignore_errors=True)
+                st.error(f"❌ Error: {str(e)}")
 
-@app.post("/convert-text")
-async def convert_text(
-    html: str = Form(...),
-    images: Optional[List[UploadFile]] = File(None),
-    aspect_ratio: str = Form(default="9:16"),
-    return_base64: bool = Form(default=False)
-):
-    """
-    Convert HTML text to PDF with optional images
+# Tab 2: Paste HTML Code
+with tab2:
+    col1, col2 = st.columns([1, 1])
     
-    - **html**: HTML content as string
-    - **images**: Optional list of image files
-    - **aspect_ratio**: Page orientation (16:9, 1:1, or 9:16)
-    - **return_base64**: If true, returns base64 encoded PDF in JSON
-    """
-    if aspect_ratio not in ["16:9", "1:1", "9:16"]:
-        raise HTTPException(status_code=400, detail="Invalid aspect ratio. Use: 16:9, 1:1, or 9:16")
-    
-    temp_dir = None
-    try:
-        # Create temporary directory
-        temp_dir = tempfile.mkdtemp()
-        
-        # Process images if provided
-        if images:
-            image_mapping = save_uploaded_images(images, temp_dir)
-            html = process_html_with_images(html, temp_dir, image_mapping)
+    with col1:
+        html_code = st.text_area(
+            "HTML Content",
+            value="""<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample Document</title>
+    <style>
+        body {
+            font-family: Arial, sans-serif;
+            margin: 40px;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+        }
+        h1 {
+            font-size: 48px;
+            margin-bottom: 20px;
+            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
+        }
+        p {
+            font-size: 18px;
+            line-height: 1.6;
+        }
+        .box {
+            background: rgba(255,255,255,0.1);
+            padding: 20px;
+            border-radius: 10px;
+            margin-top: 20px;
+        }
+    </style>
+</head>
+<body>
+    <h1>Hello, PDF World! 🌍</h1>
+    <p>This is a sample HTML document converted to PDF.</p>
+    <div class="box">
+        <p>✨ Styles, colors, and gradients are preserved!</p>
+    </div>
+</body>
+</html>""",
+            height=400,
+            key="html_code"
+        )
         
-        # Convert to PDF
-        pdf_bytes = convert_html_to_pdf(html, aspect_ratio, temp_dir)
+        # Image uploader for text tab
+        uploaded_images_text = st.file_uploader(
+            "📷 Upload Images (optional)",
+            type=['jpg', 'jpeg', 'png', 'gif', 'svg', 'webp', 'bmp'],
+            key="image_uploader_text",
+            help="Upload images referenced in your HTML code",
+            accept_multiple_files=True
+        )
         
-        # Clean up
-        shutil.rmtree(temp_dir, ignore_errors=True)
+        if uploaded_images_text:
+            st.success(f"✅ {len(uploaded_images_text)} image(s) uploaded")
+            with st.expander("View uploaded images"):
+                cols = st.columns(min(len(uploaded_images_text), 4))
+                for idx, img in enumerate(uploaded_images_text):
+                    with cols[idx % 4]:
+                        st.image(img, caption=img.name, use_container_width=True)
         
-        if return_base64:
-            # Return as JSON with base64 encoded PDF
-            pdf_base64 = base64.b64encode(pdf_bytes).decode('utf-8')
-            return JSONResponse(content={
-                "success": True,
-                "pdf_base64": pdf_base64,
-                "size_bytes": len(pdf_bytes)
-            })
+        if html_code and html_code.strip():
+            # Auto-detect aspect ratio
+            detected_ratio_text = detect_aspect_ratio(html_code)
+            
+            auto_detect_text = st.checkbox("Auto-detect aspect ratio", value=True, key="auto_detect_text")
+            
+            if auto_detect_text:
+                aspect_ratio_text = detected_ratio_text
+                st.info(f"🔍 Detected: **{detected_ratio_text}**")
+            else:
+                aspect_ratio_text = st.radio(
+                    "Aspect Ratio",
+                    options=["16:9", "1:1", "9:16"],
+                    index=["16:9", "1:1", "9:16"].index(detected_ratio_text),
+                    key="aspect_text",
+                    help="Select the page orientation and dimensions"
+                )
+            
+            convert_text_btn = st.button("🔄 Convert to PDF", key="convert_text", type="primary", width="stretch")
         else:
-            # Return PDF file directly
-            return Response(
-                content=pdf_bytes,
-                media_type="application/pdf",
-                headers={
-                    "Content-Disposition": "attachment; filename=converted.pdf"
-                }
-            )
-        
-    except Exception as e:
-        if temp_dir:
-            shutil.rmtree(temp_dir, ignore_errors=True)
-        raise HTTPException(status_code=500, detail=f"Conversion failed: {str(e)}")
-
-@app.post("/convert-with-images")
-async def convert_with_images(
-    html_file: UploadFile = File(...),
-    images: List[UploadFile] = File(...),
-    aspect_ratio: str = Form(default="9:16")
-):
-    """
-    Convert HTML with multiple images - dedicated endpoint
-    
-    - **html_file**: HTML file to convert
-    - **images**: List of image files (required)
-    - **aspect_ratio**: Page orientation (16:9, 1:1, or 9:16)
-    """
-    if not html_file.filename.lower().endswith(('.html', '.htm')):
-        raise HTTPException(status_code=400, detail="HTML file must be .html or .htm")
-    
-    if aspect_ratio not in ["16:9", "1:1", "9:16"]:
-        raise HTTPException(status_code=400, detail="Invalid aspect ratio. Use: 16:9, 1:1, or 9:16")
+            convert_text_btn = False
     
-    # Validate image files
-    allowed_extensions = {'.jpg', '.jpeg', '.png', '.gif', '.svg', '.webp', '.bmp'}
-    for img in images:
-        ext = Path(img.filename).suffix.lower()
-        if ext not in allowed_extensions:
-            raise HTTPException(
-                status_code=400, 
-                detail=f"Invalid image format: {img.filename}. Allowed: {', '.join(allowed_extensions)}"
-            )
+    with col2:
+        if html_code and html_code.strip():
+            st.subheader("👁️ HTML Preview")
+            with st.expander("Show HTML Preview", expanded=False):
+                st.components.v1.html(render_html_preview(html_code), height=600, scrolling=True)
     
-    temp_dir = None
-    try:
-        # Create temporary directory
-        temp_dir = tempfile.mkdtemp()
-        
-        # Read HTML content
-        content = await html_file.read()
+    if convert_text_btn and html_code and html_code.strip():
+        temp_dir = None
         try:
-            html_content = content.decode('utf-8')
-        except UnicodeDecodeError:
-            html_content = content.decode('latin-1')
-        
-        # Save and process images
-        image_mapping = save_uploaded_images(images, temp_dir)
-        html_content = process_html_with_images(html_content, temp_dir, image_mapping)
-        
-        # Convert to PDF
-        pdf_bytes = convert_html_to_pdf(html_content, aspect_ratio, temp_dir)
-        
-        # Clean up
-        shutil.rmtree(temp_dir, ignore_errors=True)
-        
-        # Return PDF
-        filename = html_file.filename.replace('.html', '.pdf').replace('.htm', '.pdf')
-        if not filename.endswith('.pdf'):
-            filename += '.pdf'
-            
-        return Response(
-            content=pdf_bytes,
-            media_type="application/pdf",
-            headers={
-                "Content-Disposition": f"attachment; filename={filename}",
-                "X-Image-Count": str(len(images))
-            }
-        )
-        
-    except Exception as e:
-        if temp_dir:
-            shutil.rmtree(temp_dir, ignore_errors=True)
-        raise HTTPException(status_code=500, detail=f"Conversion failed: {str(e)}")
+            with st.spinner("Converting HTML to PDF..."):
+                # Create temp directory
+                temp_dir = tempfile.mkdtemp()
+                
+                # Process images if uploaded
+                processed_html = html_code
+                if uploaded_images_text:
+                    image_mapping = save_uploaded_images(uploaded_images_text, temp_dir)
+                    processed_html = process_html_with_images(html_code, temp_dir, image_mapping)
+                    st.info(f"📷 Processed {len(uploaded_images_text)} image(s)")
+                    # Debug info
+                    with st.expander("🔍 Debug: Image Mapping"):
+                        for orig, new in image_mapping.items():
+                            st.text(f"{orig} -> {new}")
+                            full_path = os.path.join(temp_dir, new)
+                            st.text(f"Full path: {full_path}")
+                            st.text(f"Exists: {os.path.exists(full_path)}")
+                
+                # Convert to PDF
+                pdf_bytes, error = convert_html_to_pdf(processed_html, aspect_ratio_text, temp_dir)
+                
+                # Cleanup
+                if temp_dir:
+                    shutil.rmtree(temp_dir, ignore_errors=True)
+                
+                if error:
+                    st.error(f"❌ {error}")
+                    with st.expander("Show error details"):
+                        st.code(error)
+                else:
+                    st.success("✅ PDF generated successfully!")
+                    
+                    col_a, col_b = st.columns([1, 1])
+                    
+                    with col_a:
+                        st.download_button(
+                            label="⬇️ Download PDF",
+                            data=pdf_bytes,
+                            file_name="converted.pdf",
+                            mime="application/pdf",
+                            width="stretch",
+                            key="download_text_pdf"
+                        )
+                    
+                    with col_b:
+                        st.info(f"📦 Size: {len(pdf_bytes):,} bytes")
+                    
+                    # PDF Preview
+                    st.subheader("📄 PDF Preview")
+                    st.components.v1.html(render_pdf_preview(pdf_bytes), height=620, scrolling=True)
+        except Exception as e:
+            if temp_dir:
+                shutil.rmtree(temp_dir, ignore_errors=True)
+            st.error(f"❌ Error: {str(e)}")
+
+# Footer with tips
+st.markdown("---")
+st.markdown("""
+### 💡 Tips:
+- **Auto-detection** analyzes your HTML to suggest the best aspect ratio
+- **16:9** - Best for presentations and landscape documents (297mm × 210mm)
+- **1:1** - Square format (210mm × 210mm)
+- **9:16** - Portrait format, standard A4 (210mm × 297mm)
+- **Image Support** - Upload JPG, PNG, GIF, SVG, WebP, or BMP images
+- All CSS styles, colors, gradients, and fonts are preserved
+- Use inline CSS or `<style>` tags for best results
+- Reference images by filename in your HTML (e.g., `<img src="image.jpg">`)
+- External resources should use absolute URLs
+- **PDF Preview** renders directly in the browser using PDF.js
 
-if __name__ == "__main__":
-    import uvicorn
-    uvicorn.run(app, host="0.0.0.0", port=7860)
+### 🖼️ Using Images:
+1. Upload your HTML file
+2. Upload all images referenced in the HTML
+3. Make sure image filenames in HTML match uploaded files exactly
+4. The converter will automatically embed images in the PDF
+""")