# data_manager.py

import os
import json
import datetime
from typing import Dict, Any, Optional, List

class DataManager:
    def __init__(self, base_path: str = '/data'):
        """Initialize the data manager"""
        self.base_path = base_path
        self._ensure_directories()

    def _ensure_directories(self):
        """Create necessary directory structure"""
        directories = [
            self.base_path,
            os.path.join(self.base_path, 'blueprints'),
            os.path.join(self.base_path, 'book_content'),
            os.path.join(self.base_path, 'exports'),
            os.path.join(self.base_path, 'chapters'),
            os.path.join(self.base_path, 'manual_content')
        ]
        
        for dir_path in directories:
            os.makedirs(dir_path, exist_ok=True)

    def save_blueprint(self, blueprint: str) -> str:
        """Save blueprint to file"""
        timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
        filename = f"blueprint_{timestamp}.txt"
        filepath = os.path.join(self.base_path, 'blueprints', filename)
        
        try:
            with open(filepath, 'w') as f:
                f.write(blueprint)
            return filename
        except Exception as e:
            raise Exception(f"Error saving blueprint: {e}")

    def save_manual_content(self, part_idx: int, chapter_idx: int, content: str) -> str:
        """Save manual pre-written content"""
        filename = f"manual_content_part_{part_idx}_chapter_{chapter_idx}.txt"
        filepath = os.path.join(self.base_path, 'manual_content', filename)
        
        try:
            with open(filepath, 'w') as f:
                f.write(content)
            return filename
        except Exception as e:
            raise Exception(f"Error saving manual content: {e}")

    def load_manual_content(self, part_idx: int, chapter_idx: int) -> Optional[str]:
        """Load manual pre-written content if it exists"""
        filename = f"manual_content_part_{part_idx}_chapter_{chapter_idx}.txt"
        filepath = os.path.join(self.base_path, 'manual_content', filename)
        
        try:
            if os.path.exists(filepath):
                with open(filepath, 'r') as f:
                    return f.read()
            return None
        except Exception as e:
            raise Exception(f"Error loading manual content: {e}")

    def save_book_content(self, content: Dict[str, Any]) -> str:
        """Save complete book content"""
        timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
        filename = f"book_content_{timestamp}.json"
        filepath = os.path.join(self.base_path, 'book_content', filename)
        
        try:
            with open(filepath, 'w') as f:
                json.dump(content, f, indent=4)
            return filename
        except Exception as e:
            raise Exception(f"Error saving book content: {e}")

    def save_chapter(self, part_idx: int, chapter_idx: int, content: Dict[str, Any]):
        """Save individual chapter content"""
        filename = f"part_{part_idx}_chapter_{chapter_idx}.json"
        filepath = os.path.join(self.base_path, 'chapters', filename)
        
        try:
            with open(filepath, 'w') as f:
                json.dump(content, f, indent=4)
        except Exception as e:
            raise Exception(f"Error saving chapter: {e}")

    def load_latest_blueprint(self) -> Optional[str]:
        """Load most recent blueprint"""
        blueprint_dir = os.path.join(self.base_path, 'blueprints')
        try:
            files = os.listdir(blueprint_dir)
            if not files:
                return None
                
            latest_file = max(files, key=lambda f: os.path.getctime(
                os.path.join(blueprint_dir, f)
            ))
            
            with open(os.path.join(blueprint_dir, latest_file), 'r') as f:
                return f.read()
        except Exception as e:
            raise Exception(f"Error loading blueprint: {e}")

    def load_latest_book_content(self) -> Optional[Dict[str, Any]]:
        """Load most recent book content"""
        content_dir = os.path.join(self.base_path, 'book_content')
        try:
            files = os.listdir(content_dir)
            if not files:
                return None
                
            latest_file = max(files, key=lambda f: os.path.getctime(
                os.path.join(content_dir, f)
            ))
            
            with open(os.path.join(content_dir, latest_file), 'r') as f:
                return json.load(f)
        except Exception as e:
            raise Exception(f"Error loading book content: {e}")

    def export_markdown(self, content: Dict[str, Any]) -> str:
        """Export book content as markdown"""
        timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
        filename = f"self_api_book_{timestamp}.md"
        filepath = os.path.join(self.base_path, 'exports', filename)
        
        try:
            markdown_content = (
                f"# {content.get('book_info', {}).get('title', 'Book Title')}\n\n"
                "## Introduction\n\n"
            )
            markdown_content += content.get('introduction', '') + "\n\n"
            
            for part_idx, part in enumerate(content.get('parts', [])):
                markdown_content += f"# Part {part_idx + 1}: {part['title']}\n\n"
                for chapter in part.get('chapters', []):
                    markdown_content += f"## {chapter['title']}\n\n"
                    markdown_content += chapter.get('content', '') + "\n\n"
            
            with open(filepath, 'w') as f:
                f.write(markdown_content)
                
            return filepath
        except Exception as e:
            raise Exception(f"Error exporting markdown: {e}")