"""
Multi-Language Support Module
Provides translation and multi-language support for the chatbot.

Developer: RSK World
Website: https://rskworld.in
Email: help@rskworld.in
Phone: +91 93305 39277
Year: 2026
"""

from typing import Dict, Optional
import re


class LanguageSupport:
    """
    Provides multi-language support and language detection.
    """
    
    def __init__(self):
        """Initialize language support."""
        # Supported languages
        self.supported_languages = {
            'en': 'English',
            'es': 'Spanish',
            'fr': 'French',
            'de': 'German',
            'hi': 'Hindi',
            'zh': 'Chinese',
            'ja': 'Japanese',
            'ar': 'Arabic'
        }
        
        # Language detection patterns
        self.language_patterns = {
            'hi': r'[\u0900-\u097F]',  # Devanagari script
            'zh': r'[\u4e00-\u9fff]',  # Chinese characters
            'ja': r'[\u3040-\u309F\u30A0-\u30FF]',  # Hiragana/Katakana
            'ar': r'[\u0600-\u06FF]',  # Arabic script
        }
        
        # Common phrases in different languages
        self.greetings = {
            'en': ['hello', 'hi', 'hey', 'greetings'],
            'es': ['hola', 'buenos días', 'buenas tardes'],
            'fr': ['bonjour', 'salut', 'bonsoir'],
            'de': ['hallo', 'guten tag', 'guten morgen'],
            'hi': ['नमस्ते', 'नमस्कार', 'हैलो'],
            'zh': ['你好', '您好'],
            'ja': ['こんにちは', 'こんばんは'],
            'ar': ['مرحبا', 'السلام عليكم']
        }
        
        self.current_language = 'en'
    
    def detect_language(self, text: str) -> str:
        """
        Detect language of input text.
        
        Args:
            text: Input text
            
        Returns:
            Language code (e.g., 'en', 'es', 'hi')
        """
        if not text:
            return 'en'
        
        # Check for script-based languages
        for lang_code, pattern in self.language_patterns.items():
            if re.search(pattern, text):
                return lang_code
        
        # Check for common phrases
        text_lower = text.lower()
        for lang_code, phrases in self.greetings.items():
            for phrase in phrases:
                if phrase.lower() in text_lower:
                    return lang_code
        
        # Default to English
        return 'en'
    
    def set_language(self, language_code: str) -> bool:
        """
        Set current language.
        
        Args:
            language_code: Language code (e.g., 'en', 'es')
            
        Returns:
            True if language is supported, False otherwise
        """
        if language_code in self.supported_languages:
            self.current_language = language_code
            return True
        return False
    
    def get_language(self) -> str:
        """Get current language code."""
        return self.current_language
    
    def get_language_name(self, language_code: Optional[str] = None) -> str:
        """
        Get language name.
        
        Args:
            language_code: Language code (uses current if not provided)
            
        Returns:
            Language name
        """
        code = language_code or self.current_language
        return self.supported_languages.get(code, 'Unknown')
    
    def get_supported_languages(self) -> Dict[str, str]:
        """
        Get all supported languages.
        
        Returns:
            Dictionary mapping language codes to names
        """
        return self.supported_languages.copy()
    
    def translate_greeting(self, language_code: str) -> str:
        """
        Get greeting in specified language.
        
        Args:
            language_code: Target language code
            
        Returns:
            Greeting in target language
        """
        greetings = {
            'en': 'Hello! How can I help you?',
            'es': '¡Hola! ¿Cómo puedo ayudarte?',
            'fr': 'Bonjour! Comment puis-je vous aider?',
            'de': 'Hallo! Wie kann ich Ihnen helfen?',
            'hi': 'नमस्ते! मैं आपकी कैसे मदद कर सकता हूं?',
            'zh': '你好！我能为你做什么？',
            'ja': 'こんにちは！何かお手伝いできますか？',
            'ar': 'مرحبا! كيف يمكنني مساعدتك؟'
        }
        return greetings.get(language_code, greetings['en'])
    
    def is_supported(self, language_code: str) -> bool:
        """
        Check if language is supported.
        
        Args:
            language_code: Language code to check
            
        Returns:
            True if supported, False otherwise
        """
        return language_code in self.supported_languages

"""
Flask Web Interface for Conversational AI Bot
Provides a web-based interface for the chatbot.

Developer: RSK World
Website: https://rskworld.in
Email: help@rskworld.in
Phone: +91 93305 39277
Year: 2026
"""

from flask import Flask, render_template, request, jsonify, session
from chatbot import ConversationalAIBot
import uuid
import os

app = Flask(__name__)
app.secret_key = os.urandom(24)

# Store bot instances per session
bot_instances = {}


def get_bot():
    """Get or create bot instance for current session."""
    if 'session_id' not in session:
        session['session_id'] = str(uuid.uuid4())
    
    session_id = session['session_id']
    
    if session_id not in bot_instances:
        bot_instances[session_id] = ConversationalAIBot(session_id)
    
    return bot_instances[session_id]


@app.route('/')
def index():
    """Render main chat interface."""
    return render_template('index.html')


@app.route('/api/chat', methods=['POST'])
def chat():
    """Handle chat API requests."""
    try:
        data = request.get_json()
        user_message = data.get('message', '').strip()
        
        if not user_message:
            return jsonify({
                'success': False,
                'error': 'Message is required'
            }), 400
        
        bot = get_bot()
        response = bot.chat(user_message)
        
        # Get additional metadata
        sentiment = bot.get_sentiment_analysis(user_message)
        context = bot.get_context_summary()
        
        return jsonify({
            'success': True,
            'response': response,
            'sentiment': sentiment.get('sentiment'),
            'sentiment_score': sentiment.get('score'),
            'context': context
        })
    
    except Exception as e:
        return jsonify({
            'success': False,
            'error': str(e)
        }), 500


@app.route('/api/history', methods=['GET'])
def get_history():
    """Get conversation history."""
    try:
        bot = get_bot()
        limit = request.args.get('limit', 10, type=int)
        history = bot.get_conversation_history(limit=limit)
        
        return jsonify({
            'success': True,
            'history': history
        })
    
    except Exception as e:
        return jsonify({
            'success': False,
            'error': str(e)
        }), 500


@app.route('/api/analytics', methods=['GET'])
def get_analytics():
    """Get conversation analytics."""
    try:
        bot = get_bot()
        analytics = bot.get_analytics()
        summary = bot.get_analytics_summary()
        
        return jsonify({
            'success': True,
            'analytics': analytics,
            'summary': summary
        })
    
    except Exception as e:
        return jsonify({
            'success': False,
            'error': str(e)
        }), 500


@app.route('/api/clear', methods=['POST'])
def clear_session():
    """Clear conversation session."""
    try:
        bot = get_bot()
        bot.clear_session()
        
        return jsonify({
            'success': True,
            'message': 'Session cleared successfully'
        })
    
    except Exception as e:
        return jsonify({
            'success': False,
            'error': str(e)
        }), 500


@app.route('/api/language', methods=['POST'])
def set_language():
    """Set conversation language."""
    try:
        data = request.get_json()
        language_code = data.get('language', 'en')
        
        bot = get_bot()
        success = bot.set_language(language_code)
        
        return jsonify({
            'success': success,
            'language': bot.get_current_language(),
            'message': f'Language set to {language_code}' if success else 'Invalid language code'
        })
    
    except Exception as e:
        return jsonify({
            'success': False,
            'error': str(e)
        }), 500


if __name__ == '__main__':
    # Create templates directory if it doesn't exist
    os.makedirs('templates', exist_ok=True)
    os.makedirs('static', exist_ok=True)
    
    app.run(debug=True, host='0.0.0.0', port=5000)