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import os
import tempfile
import time
from gtts import gTTS
import streamlit as st

# Import translation library with fallback
try:
    from googletrans import Translator
    TRANSLATOR_AVAILABLE = True
except ImportError:
    TRANSLATOR_AVAILABLE = False

# Fallback translation using requests
import requests
import json

class TranslationAgent:
    def __init__(self):
        if TRANSLATOR_AVAILABLE:
            self.translator = Translator()
        else:
            self.translator = None
            
        self.languages = {
            'en': 'English',
            'es': 'Spanish', 
            'fr': 'French',
            'de': 'German',
            'it': 'Italian',
            'pt': 'Portuguese',
            'ru': 'Russian',
            'zh': 'Chinese',
            'ja': 'Japanese',
            'ko': 'Korean',
            'ar': 'Arabic',
            'hi': 'Hindi',
            'tr': 'Turkish',
            'pl': 'Polish',
            'nl': 'Dutch',
            'sv': 'Swedish',
            'da': 'Danish',
            'no': 'Norwegian',
            'fi': 'Finnish',
            'cs': 'Czech',
            'hu': 'Hungarian',
            'ro': 'Romanian',
            'bg': 'Bulgarian',
            'hr': 'Croatian',
            'sk': 'Slovak',
            'sl': 'Slovenian',
            'et': 'Estonian',
            'lv': 'Latvian',
            'lt': 'Lithuanian',
            'mt': 'Maltese',
            'ga': 'Irish',
            'cy': 'Welsh',
            'eu': 'Basque',
            'ca': 'Catalan',
            'gl': 'Galician',
            'is': 'Icelandic',
            'mk': 'Macedonian',
            'sq': 'Albanian',
            'be': 'Belarusian',
            'uk': 'Ukrainian',
            'he': 'Hebrew',
            'th': 'Thai',
            'vi': 'Vietnamese',
            'id': 'Indonesian',
            'ms': 'Malay',
            'tl': 'Filipino',
            'sw': 'Swahili',
            'am': 'Amharic',
            'bn': 'Bengali',
            'gu': 'Gujarati',
            'kn': 'Kannada',
            'ml': 'Malayalam',
            'mr': 'Marathi',
            'ne': 'Nepali',
            'or': 'Odia',
            'pa': 'Punjabi',
            'si': 'Sinhala',
            'ta': 'Tamil',
            'te': 'Telugu',
            'ur': 'Urdu',
            'my': 'Myanmar',
            'km': 'Khmer',
            'lo': 'Lao',
            'ka': 'Georgian',
            'hy': 'Armenian',
            'az': 'Azerbaijani',
            'kk': 'Kazakh',
            'ky': 'Kyrgyz',
            'mn': 'Mongolian',
            'tg': 'Tajik',
            'tk': 'Turkmen',
            'uz': 'Uzbek',
            'fa': 'Persian',
            'ps': 'Pashto',
            'sd': 'Sindhi',
            'so': 'Somali',
            'xh': 'Xhosa',
            'zu': 'Zulu',
            'af': 'Afrikaans'
        }
        
        # TTS language mapping for compatibility
        self.tts_map = {
            'zh': 'zh-cn',
            'or': 'hi',
            'ps': 'fa',
            'sd': 'ur',
            'ky': 'ru',
            'kk': 'ru',
            'tg': 'ru',
            'tk': 'ru',
            'uz': 'ru',
            'am': 'ar',
            'my': 'th',
            'km': 'th',
            'lo': 'th',
        }
    
    def translate_with_googletrans(self, text, source_lang=None, target_lang='en'):
        """Try translation with googletrans library"""
        try:
            if source_lang:
                result = self.translator.translate(text, src=source_lang, dest=target_lang)
            else:
                result = self.translator.translate(text, dest=target_lang)
            
            return {
                'translated_text': result.text,
                'detected_language': result.src,
                'target_language': target_lang,
                'original_text': text
            }
        except Exception as e:
            raise Exception(f"GoogleTrans failed: {str(e)}")
    
    def translate_with_api(self, text, source_lang=None, target_lang='en'):
        """Fallback translation using direct API"""
        try:
            base_url = "https://translate.googleapis.com/translate_a/single"
            
            params = {
                'client': 'gtx',
                'sl': source_lang if source_lang else 'auto',
                'tl': target_lang,
                'dt': 't',
                'q': text
            }
            
            headers = {
                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
            }
            
            response = requests.get(base_url, params=params, headers=headers, timeout=10)
            response.raise_for_status()
            
            result = response.json()
            
            translated_text = ""
            if result and len(result) > 0 and result[0]:
                for sentence in result[0]:
                    if sentence and sentence[0]:
                        translated_text += sentence[0]
            
            detected_lang = result[2] if len(result) > 2 else (source_lang or 'auto')
            
            return {
                'translated_text': translated_text if translated_text.strip() else text,
                'detected_language': detected_lang,
                'target_language': target_lang,
                'original_text': text
            }
            
        except Exception as e:
            raise Exception(f"API translation failed: {str(e)}")
    
    def translate_text(self, text, source_lang=None, target_lang='en'):
        """

        Translate text with multiple fallbacks

        """
        # Try googletrans first
        if TRANSLATOR_AVAILABLE and self.translator:
            try:
                return self.translate_with_googletrans(text, source_lang, target_lang)
            except:
                pass
        
        # Try direct API
        try:
            return self.translate_with_api(text, source_lang, target_lang)
        except:
            pass
        
        # Final fallback - return original text
        return {
            'translated_text': text,
            'detected_language': source_lang or 'auto',
            'target_language': target_lang,
            'original_text': text
        }
    
    def text_to_speech(self, text, language='en'):
        """

        Convert text to speech with fallbacks

        """
        try:
            # Map language for TTS compatibility
            tts_lang = self.tts_map.get(language, language)
            
            # Try primary language
            tts = gTTS(text=text, lang=tts_lang, slow=False)
            temp_file = tempfile.NamedTemporaryFile(delete=False, suffix='.mp3')
            temp_file.close()
            tts.save(temp_file.name)
            
            return temp_file.name
            
        except Exception as e:
            # Fallback to English if original fails
            try:
                if language != 'en':
                    tts = gTTS(text=text, lang='en', slow=False)
                    temp_file = tempfile.NamedTemporaryFile(delete=False, suffix='.mp3')
                    temp_file.close()
                    tts.save(temp_file.name)
                    return temp_file.name
                else:
                    raise e
            except:
                raise Exception(f"Text-to-speech failed: {str(e)}")
    
    def translate_and_speak(self, text, source_lang=None, target_lang='en'):
        """

        Complete workflow: translate text and generate speech

        """
        try:
            # Step 1: Translate text
            translation_result = self.translate_text(text, source_lang, target_lang)
            
            # Step 2: Convert translated text to speech
            audio_file = self.text_to_speech(
                translation_result['translated_text'], 
                target_lang
            )
            
            # Step 3: Return complete result
            return {
                'original_text': text,
                'translated_text': translation_result['translated_text'],
                'detected_language': translation_result['detected_language'],
                'target_language': target_lang,
                'audio_file': audio_file
            }
            
        except Exception as e:
            raise Exception(f"Translation and speech generation failed: {str(e)}")
    
    def get_supported_languages(self):
        """Get supported languages"""
        return self.languages.copy()
    
    def cleanup_temp_files(self, file_path):
        """Clean up temporary files"""
        try:
            if os.path.exists(file_path):
                os.unlink(file_path)
        except:
            pass