import pygame
import speech_recognition as sr
from openai import OpenAI
from pathlib import Path
import os
import io
import soundfile as sf
import sounddevice as sd
import random
import csv

# Initialize Pygame mixer for audio playback
pygame.mixer.init()

# Set your OpenAI API key here
api_key = 'sk-proj-wwWaxim1Qt13uqzSS6660xjT3BlbkFJK0rZvx78AJiWG3Ot7d3S'  # Replace with your actual OpenAI API key
client = OpenAI(api_key=api_key)

# Cache for content and previous responses
content_cache = {}
response_cache = {}

# Function to read text file
def read_text_file(file_path):
    try:
        with open(file_path, 'r', encoding='utf-8') as file:
            return file.read()
    except Exception as e:
        print(f"Error reading text file: {e}")
        return ""

# Function to read CSV file
def read_csv_file(file_path):
    content = ""
    try:
        with open(file_path, mode='r', encoding='utf-8') as file:
            reader = csv.reader(file)
            for row in reader:
                content += ' '.join(row) + ' '
    except Exception as e:
        print(f"Error reading CSV file: {e}")
    return content

# Function to recognize speech from the microphone
def recognize_speech():
    recognizer = sr.Recognizer()
    with sr.Microphone() as source:
        print("Listening...")
        audio = recognizer.listen(source)
        try:
            print("Recognizing...")
            text = recognizer.recognize_google(audio, language='en-US')
            # Play a random audio response
            random_audio = random.choice(["ty.mp3", "th.mp3", "sure.mp3", "sure1.mp3"])
            pygame.mixer.music.load(random_audio)
            pygame.mixer.music.play()
            print(f"You said: {text}")
            return text
        except sr.UnknownValueError:
            print("Sorry, I did not understand that.")
            return None
        except sr.RequestError:
            print("Sorry, there was an error with the speech recognition service.")
            return None

# Function to create messages for OpenAI API
def create_messages(question, file_content):
    return [
        {"role": "system", "content": "Your name is Futurebot..."},
        {"role": "user", "content": f"{file_content}\n\nQ: {question}\nA:"}
    ]

# Function to get a response from OpenAI
def get_response_from_openai(messages):
    stream = client.chat.completions.create(
        model="gpt-3.5-turbo",
        max_tokens=150,
        temperature=0.5,
        messages=messages,
        stream=True,
    )
    for chunk in stream:
        yield chunk

# Function to generate and play speech in chunks
def generate_speech(text):
    if text.strip():
        spoken_response = client.audio.speech.create(
            model="tts-1",
            voice="alloy",
            input=text
        )

        buffer = io.BytesIO()
        for chunk in spoken_response.iter_bytes(chunk_size=4096):
            buffer.write(chunk)
        buffer.seek(0)

        with sf.SoundFile(buffer, 'r') as sound_file:
            data = sound_file.read(dtype='int16')
            sd.play(data, sound_file.samplerate)
            sd.wait()

# Function to load files once at startup
def load_files_once(text_file_path, csv_file_path):
    text_content = read_text_file(text_file_path)
    csv_content = read_csv_file(csv_file_path)
    return text_content + ' ' + csv_content

# Function to reload files if they have been modified since the last load
def load_files_if_updated(text_file_path, csv_file_path, last_mod_time):
    text_mod_time = os.path.getmtime(text_file_path)
    csv_mod_time = os.path.getmtime(csv_file_path)
    if text_mod_time > last_mod_time['text'] or csv_mod_time > last_mod_time['csv']:
        print("Files updated, reloading...")
        last_mod_time['text'] = text_mod_time
        last_mod_time['csv'] = csv_mod_time
        return read_text_file(text_file_path) + ' ' + read_csv_file(csv_file_path)
    return None  # No update

# Function to cache and retrieve responses
def get_cached_response(question, combined_content):
    # Generate a unique key based on question and content
    cache_key = (question, combined_content)

    # Check if the response is already cached
    if cache_key in response_cache:
        print("Using cached response")
        return response_cache[cache_key]

    # Otherwise, generate a new response
    messages = create_messages(question, combined_content)
    response_generator = get_response_from_openai(messages)

    accumulated_response = ""

    # Process the response chunk by chunk
    for response_chunk in response_generator:
        chunk_content = response_chunk.choices[0].delta.content if response_chunk.choices else None

        # Check if chunk_content is not None
        if chunk_content:
            accumulated_response += chunk_content
            
            # Check for sentence end or length
            if '.' in chunk_content or len(accumulated_response) > 600:
                print(accumulated_response, end="", flush=True)
                generate_speech(accumulated_response)
                accumulated_response = ""  # Reset accumulated response for the next chunk

    if accumulated_response:  # Generate speech for any remaining text
        print(accumulated_response, end="", flush=True)
        generate_speech(accumulated_response)

    # Cache the response for future use
    response_cache[cache_key] = accumulated_response
    return accumulated_response

# Main function to handle user query
def chatbot(question, combined_content):
    response = get_cached_response(question, combined_content)
    print("Answer: ", response)
    generate_speech(response)

if __name__ == "__main__":
    text_file_path = 'Allinone.txt'  # Path to your text file
    csv_file_path = 'device_data.csv'  # Path to your CSV file

    # Load the files once at startup
    last_mod_time = {'text': 0, 'csv': 0}
    combined_content = load_files_once(text_file_path, csv_file_path)
    last_mod_time['text'] = os.path.getmtime(text_file_path)
    last_mod_time['csv'] = os.path.getmtime(csv_file_path)

    # Main loop
    while True:
        question = recognize_speech()
        if question:
            # Check if files have been updated, and reload if necessary
            updated_content = load_files_if_updated(text_file_path, csv_file_path, last_mod_time)
            if updated_content:
                combined_content = updated_content

            # Call the chatbot with the current content
            chatbot(question, combined_content)
        else:
            print("Sorry, I didn't get that. Please ask again.")