"""
Main Gradio application for Text-to-Infographics Generator
"""
import os
import logging
import gradio as gr
from typing import Dict, List, Tuple, Optional
import tempfile

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

# Import our modules
from config import Config
from src.text_processor import TextProcessor
from src.gemini_client import GeminiClient
from src.template_manager import TemplateManager
from src.layout_engine import LayoutEngine
from src.color_palette import ColorPalette
from src.image_generator import ImageGenerator
from utils.helpers import sanitize_text, validate_content_length, generate_unique_id
from examples.sample_texts import get_sample_text, get_all_categories

# Initialize components
text_processor = TextProcessor()
gemini_client = GeminiClient()
template_manager = TemplateManager()
layout_engine = LayoutEngine()
color_palette = ColorPalette()
image_generator = ImageGenerator()

def generate_infographic(text: str, template_style: str, custom_color: str, 
                        layout_type: str, progress=gr.Progress()) -> Tuple[str, str, str]:
    """
    Main function to generate infographic
    
    Args:
        text: Input text content
        template_style: Selected template style
        custom_color: Custom primary color
        layout_type: Layout arrangement type
        progress: Gradio progress tracker
        
    Returns:
        Tuple of (image_path, status_message, download_file_path)
    """
    try:
        # Validate inputs
        progress(0.1, desc="Validating input...")
        
        if not text or len(text.strip()) < 10:
            return None, "❌ Please provide more substantial text content (at least 10 characters)", None
        
        # Sanitize and validate content
        text = sanitize_text(text)
        content_validation = validate_content_length(text)
        
        if not content_validation['valid']:
            return None, f"❌ {content_validation['message']}", None
        
        # Step 1: Process text
        progress(0.2, desc="Analyzing text content...")
        logger.info("Starting text analysis")
        text_analysis = text_processor.analyze_text(text)
        
        # Step 2: Get AI insights
        progress(0.3, desc="Getting AI insights...")
        logger.info("Getting AI insights from Gemini")
        enhanced_analysis = gemini_client.analyze_content(text_analysis)
        
        # Generate title if not present
        if not enhanced_analysis.get('title'):
            progress(0.35, desc="Generating title...")
            enhanced_analysis['title'] = gemini_client.generate_title(text)
        
        # Step 3: Apply template styling
        progress(0.4, desc="Applying template styling...")
        logger.info(f"Applying {template_style} template")
        styled_content = template_manager.apply_template_to_content(
            enhanced_analysis, template_style, custom_color, layout_type
        )
        
        # Step 4: Create layout
        progress(0.6, desc="Creating layout...")
        logger.info("Generating layout")
        layout_data = layout_engine.create_layout(styled_content)
        
        # Optimize layout
        progress(0.7, desc="Optimizing layout...")
        layout_data = layout_engine.optimize_layout(layout_data)
        
        # Step 5: Generate image
        progress(0.8, desc="Generating infographic image...")
        logger.info("Creating final image")
        export_data = layout_engine.export_layout_data(layout_data)
        image_path = image_generator.create_infographic(export_data)
        
        # Step 6: Create downloadable file
        progress(0.9, desc="Preparing download...")
        download_path = _prepare_download_file(image_path, template_style)
        
        progress(1.0, desc="Complete!")
        
        success_message = f"✅ Infographic generated successfully!\n📊 Template: {template_style}\n📐 Layout: {layout_type}\n📝 {len(text.split())} words processed"
        
        return image_path, success_message, download_path
        
    except Exception as e:
        logger.error(f"Error generating infographic: {e}")
        error_message = f"❌ Error generating infographic: {str(e)}"
        return None, error_message, None

def _prepare_download_file(image_path: str, template_style: str) -> str:
    """Prepare downloadable file"""
    try:
        if not image_path or not os.path.exists(image_path):
            return None
        
        # Create a copy for download with better filename
        download_filename = f"infographic_{template_style.lower()}_{generate_unique_id()}.png"
        download_path = os.path.join(tempfile.gettempdir(), download_filename)
        
        # Copy file
        import shutil
        shutil.copy2(image_path, download_path)
        
        return download_path
    except Exception as e:
        logger.error(f"Error preparing download file: {e}")
        return image_path  # Return original if copy fails

def load_sample_text(category: str) -> str:
    """Load sample text by category"""
    try:
        return get_sample_text(category)
    except Exception as e:
        logger.error(f"Error loading sample text: {e}")
        return ""

def get_template_info(template_name: str) -> str:
    """Get template information"""
    try:
        info = template_manager.get_template_preview_data(template_name)
        if info:
            description = info.get('description', 'Professional infographic template')
            best_for = ', '.join(info.get('best_for', ['General use']))
            return f"**{template_name}**: {description}\n**Best for**: {best_for}"
        return f"**{template_name}**: Professional infographic template"
    except Exception as e:
        logger.error(f"Error getting template info: {e}")
        return f"**{template_name}**: Professional template"

def create_interface():
    """Create the main Gradio interface"""
    
    # Custom CSS for better styling
    css = """
    .gradio-container {
        max-width: 1400px !important;
        margin: auto;
    }
    .main-header {
        text-align: center;
        margin-bottom: 2rem;
    }
    .feature-box {
        padding: 1rem;
        border-radius: 8px;
        margin: 0.5rem 0;
    }
    .status-box {
        padding: 1rem;
        border-radius: 8px;
        margin-top: 1rem;
    }
    """
    
    with gr.Blocks(
        theme=gr.themes.Soft(
            primary_hue="blue",
            secondary_hue="gray",
            neutral_hue="gray",
        ),
        css=css,
        title="AI Text-to-Infographics Generator"
    ) as app:
        
        # Header
        gr.HTML("""
        <div class="main-header">
            <h1>🎨 AI Text-to-Infographics Generator</h1>
            <p>Transform your text into stunning, professional infographics with the power of AI</p>
        </div>
        """)
        
        with gr.Row():
            # Left Column - Input and Controls
            with gr.Column(scale=1):
                gr.Markdown("## 📝 Input Content")
                
                # Text input with sample loader
                with gr.Group():
                    text_input = gr.Textbox(
                        label="Your Text Content",
                        placeholder="Paste your content here... (articles, reports, data, etc.)",
                        lines=12,
                        max_lines=20,
                        show_label=True
                    )
                    
                    # Sample text loader
                    with gr.Row():
                        sample_category = gr.Dropdown(
                            choices=get_all_categories(),
                            label="Load Sample Text",
                            value="business_report",
                            scale=2
                        )
                        load_sample_btn = gr.Button("Load Sample", scale=1, size="sm")
                
                gr.Markdown("## 🎨 Customization")
                
                # Template selection with preview
                template_choice = gr.Dropdown(
                    choices=Config.TEMPLATES,
                    value="Modern",
                    label="Template Style",
                    info="Choose the visual style for your infographic"
                )
                
                template_info = gr.Markdown(
                    get_template_info("Modern"),
                    elem_classes=["feature-box"]
                )
                
                # Color customization
                custom_color = gr.ColorPicker(
                    label="Primary Color",
                    value="#3498db",
                    info="Choose your brand or preferred color"
                )
                
                # Layout options
                layout_type = gr.Radio(
                    choices=Config.LAYOUTS,
                    value="Vertical",
                    label="Layout Arrangement",
                    info="How content should be arranged"
                )
                
                # Generate button
                generate_btn = gr.Button(
                    "🚀 Generate Infographic",
                    variant="primary",
                    size="lg",
                    scale=1
                )
            
            # Right Column - Output and Results
            with gr.Column(scale=1):
                gr.Markdown("## 🖼️ Generated Infographic")
                
                # Output image
                output_image = gr.Image(
                    label="Your Infographic",
                    show_label=False,
                    height=600,
                    show_download_button=True
                )
                
                # Status and download
                with gr.Group():
                    status_output = gr.Textbox(
                        label="Generation Status",
                        interactive=False,
                        show_label=True,
                        elem_classes=["status-box"]
                    )
                    
                    download_file = gr.File(
                        label="Download High Resolution",
                        visible=True,
                        show_label=True
                    )
        
        # Examples section
        gr.Markdown("## 📚 Examples & Tips")
        
        with gr.Row():
            with gr.Column():
                gr.Examples(
                    examples=[
                        [
                            get_sample_text("business_report")[:500] + "...",
                            "Corporate",
                            "#2c3e50",
                            "Horizontal"
                        ],
                        [
                            get_sample_text("technology_overview")[:500] + "...",
                            "Modern", 
                            "#3498db",
                            "Vertical"
                        ],
                        [
                            get_sample_text("health_wellness")[:500] + "...",
                            "Creative",
                            "#27ae60",
                            "Grid"
                        ]
                    ],
                    inputs=[text_input, template_choice, custom_color, layout_type],
                    label="Example Configurations"
                )
            
            with gr.Column():
                gr.Markdown("""
                ### 💡 Tips for Better Results
                - **Length**: 200-2000 words work best
                - **Structure**: Use clear paragraphs and sections
                - **Data**: Include numbers and statistics for visual impact
                - **Keywords**: Use descriptive keywords for better AI analysis
                - **Format**: Bullet points and lists enhance visual appeal
                """)
        
        # Footer
        gr.HTML("""
        <div style="text-align: center; margin-top: 2rem; padding: 1rem; border-top: 1px solid #eee;">
            <p>Built with ❤️ using <strong>Gradio</strong>, <strong>Google Gemini</strong>, and <strong>Hugging Face Spaces</strong></p>
            <p><small>Transform your ideas into visual stories • Perfect for presentations, social media, and reports</small></p>
        </div>
        """)
        
        # Event handlers
        generate_btn.click(
            fn=generate_infographic,
            inputs=[text_input, template_choice, custom_color, layout_type],
            outputs=[output_image, status_output, download_file],
            show_progress=True
        )
        
        load_sample_btn.click(
            fn=load_sample_text,
            inputs=[sample_category],
            outputs=[text_input]
        )
        
        template_choice.change(
            fn=get_template_info,
            inputs=[template_choice],
            outputs=[template_info]
        )
    
    return app

def main():
    """Main application entry point"""
    try:
        logger.info("Initializing Text-to-Infographics Generator")
        
        # Check API key
        if not Config.GEMINI_API_KEY:
            logger.warning("Gemini API key not found. AI features will be limited.")
        
        # Create and launch interface
        app = create_interface()
        
        # FIXED: Removed show_tips parameter
        app.launch(
            server_name="0.0.0.0",
            server_port=7860,
            share=False,
            show_error=True
        )
        
    except Exception as e:
        logger.error(f"Failed to launch application: {e}")
        raise

if __name__ == "__main__":
    main()