import threading
import time
import gradio as gr
import logging
import json
import re
import torch
import tempfile
import subprocess
import ast
from pathlib import Path
from typing import Dict, List, Tuple, Optional, Any, Union
from dataclasses import dataclass, field
from enum import Enum
from transformers import (
    AutoTokenizer, 
    AutoModelForCausalLM, 
    pipeline,
    AutoProcessor,
    AutoModel
)
from sentence_transformers import SentenceTransformer
import faiss
import numpy as np
from PIL import Image
from transformers import BlipForConditionalGeneration

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
    handlers=[
        logging.StreamHandler(),
        logging.FileHandler('gradio_builder.log')
    ]
)
logger = logging.getLogger(__name__)

# Constants
DEFAULT_PORT = 7860
MODEL_CACHE_DIR = Path("model_cache")
TEMPLATE_DIR = Path("templates")
TEMP_DIR = Path("temp")

# Ensure directories exist
for directory in [MODEL_CACHE_DIR, TEMPLATE_DIR, TEMP_DIR]:
    directory.mkdir(exist_ok=True)

@dataclass
class Template:
    """Template data structure"""
    code: str
    description: str
    components: List[str]
    metadata: Dict[str, Any] = field(default_factory=dict)
    version: str = "1.0"

class TemplateManager:
    def __init__(self, template_dir: Path):
        self.template_dir = template_dir
        self.templates: Dict[str, Any] = {}

    def _get_builtin_templates(self) -> Dict[str, Any]:
        # Implement this method to return built-in templates
        # For now, we'll return an empty dict
        return {}

    def load_templates(self):
        """Load all templates from directory"""
        try:
            # Load built-in templates
            self.templates.update(self._get_builtin_templates())
            
            # Load custom templates
            for template_file in self.template_dir.glob("*.json"):
                try:
                    with open(template_file, 'r', encoding='utf-8') as f:
                        template_data = json.load(f)
                    
                    # Process template_data
                    template_name = template_file.stem
                    self.templates[template_name] = template_data
                    logger.info(f"Loaded template: {template_name}")
                
                except json.JSONDecodeError as e:
                    logger.error(f"Error parsing template {template_file}: {e}")
                except Exception as e:
                    logger.error(f"Error loading template {template_file}: {e}")
        
        except Exception as e:
            logger.error(f"Error loading templates: {e}")

    def get_template(self, name: str) -> Dict[str, Any]:
        """Retrieve a template by name"""
        return self.templates.get(name, {})

    def list_templates(self) -> List[Dict[str, str]]:
        """List all available templates"""
        return [{"name": name, "description": template.get("description", "")} 
                for name, template in self.templates.items()]

    def save_template(self, name: str, template: Dict[str, Any]) -> bool:
        """Save a new template"""
        try:
            file_path = self.template_dir / f"{name}.json"
            with open(file_path, 'w', encoding='utf-8') as f:
                json.dump(template, f, indent=2)
            self.templates[name] = template
            logger.info(f"Saved template: {name}")
            return True
        except Exception as e:
            logger.error(f"Error saving template {name}: {e}")
            return False

class InterfaceAnalyzer:
    @staticmethod
    def extract_components(code: str) -> List[str]:
        """Extract components from the interface code"""
        # This is a placeholder implementation. In a real-world scenario,
        # you'd want to parse the code and extract the actual components.
        return ["Textbox", "Button"]  # Example components

    @staticmethod
    def analyze_interface_structure(code: str) -> Dict[str, Any]:
        """Analyze the structure of the interface code"""
        # This is a placeholder implementation. In a real-world scenario,
        # you'd want to parse the code and extract the actual structure.
        return {
            "components": {"Textbox": 1, "Button": 1},
            "functions": {"submit": "def submit(text): ..."},
            "dependencies": ["gradio"]
        }

class CodeGenerator:
    @staticmethod
    def generate_requirements(dependencies: List[str]) -> str:
        """Generate requirements.txt content"""
        return "\n".join(dependencies)

class GradioInterface:
    def __init__(self):
        self.template_manager = TemplateManager(TEMPLATE_DIR)
        self.template_manager.load_templates()
        self.current_code = ""
        # Initialize other necessary components (e.g., rag_system, preview_manager)
        # self.rag_system = ...
        # self.preview_manager = ...

    def _get_template_choices(self) -> List[str]:
        """Get list of available templates"""
        templates = self.template_manager.list_templates()
        return [""] + [t["name"] for t in templates]

    def _generate_interface(
        self,
        description: str,
        screenshot: Optional[Image.Image],
        template_name: str
    ) -> Tuple[str, str]:
        """Generate interface code"""
        try:
            if template_name:
                template = self.template_manager.get_template(template_name)
                if template:
                    code = self.rag_system.generate_code(description, template["code"])
                else:
                    raise ValueError(f"Template {template_name} not found")
            else:
                code = self.rag_system.generate_interface(screenshot, description)
            
            self.current_code = code
            return code, "✅ Code generated successfully"
        
        except Exception as e:
            error_msg = f"❌ Error generating interface: {str(e)}"
            logger.error(error_msg)
            return "", error_msg

    def _save_as_template(self, code: str, description: str) -> Tuple[List[str], str]:
        """Save current code as template"""
        try:
            # Generate template name
            base_name = "custom_template"
            counter = 1
            name = base_name
            while self.template_manager.get_template(name):
                name = f"{base_name}_{counter}"
                counter += 1
            
            # Create template
            template = {
                "code": code,
                "description": description,
                "components": InterfaceAnalyzer.extract_components(code),
                "metadata": {"category": "custom"}
            }
            
            # Save template
            if self.template_manager.save_template(name, template):
                return self._get_template_choices(), f"✅ Template saved as {name}"
            else:
                raise Exception("Failed to save template")
            
        except Exception as e:
            error_msg = f"❌ Error saving template: {str(e)}"
            logger.error(error_msg)
            return self._get_template_choices(), error_msg

    def _load_template(self, template_name: str) -> str:
        """Load selected template"""
        if not template_name:
            return ""
        
        template = self.template_manager.get_template(template_name)
        if template:
            return template["code"]
        return ""

    def _analyze_interface(self, code: str) -> Tuple[Dict, Dict, Dict, str]:
        """Analyze interface structure"""
        try:
            analysis = InterfaceAnalyzer.analyze_interface_structure(code)
            
            # Generate requirements.txt
            dependencies = analysis.get("dependencies", [])
            requirements = CodeGenerator.generate_requirements(dependencies)
            
            return (
                analysis.get("components", {}),
                analysis.get("functions", {}),
                {"dependencies": dependencies},
                requirements
            )
        
        except Exception as e:
            logger.error(f"Error analyzing interface: {e}")
            return {}, {}, {}, ""

    # Add other necessary methods (e.g., _clear_interface, _validate_code, _format_code, _start_preview, _stop_preview)

    def launch(self, **kwargs):
        """Launch the interface"""
        # Implement the launch logic here
        pass

def main():
    # Configure logging
    logging.basicConfig(
        level=logging.INFO,
        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        handlers=[
            logging.StreamHandler(),
            logging.FileHandler('gradio_builder.log')
        ]
    )
    logger = logging.getLogger(__name__)
    logger.info("=== Application Startup ===")
    
    try:
        # Initialize and launch interface
        interface = GradioInterface()
        interface.launch(
            server_port=DEFAULT_PORT,
            share=False,
            debug=True
        )
    except Exception as e:
        logger.error(f"Application error: {e}")
        raise
    finally:
        logger.info("=== Application Shutdown ===")

if __name__ == "__main__":
    main()