import os
import gradio as gr
import nltk
import numpy as np
import tflearn
import random
import json
import pickle
from nltk.tokenize import word_tokenize
from nltk.stem.lancaster import LancasterStemmer
from transformers import AutoTokenizer, AutoModelForSequenceClassification, pipeline
import pandas as pd
import torch

# Disable GPU usage for TensorFlow
os.environ['CUDA_VISIBLE_DEVICES'] = '-1'

# Download required NLTK resources
nltk.download('punkt')

# Initialize Lancaster Stemmer
stemmer = LancasterStemmer()

# Load intents.json for the chatbot
with open("intents.json") as file:
    intents_data = json.load(file)

# Load tokenized training data
with open("data.pickle", "rb") as f:
    words, labels, training, output = pickle.load(f)

# Build the TFlearn model
def build_chatbot_model():
    net = tflearn.input_data(shape=[None, len(training[0])])
    net = tflearn.fully_connected(net, 8)
    net = tflearn.fully_connected(net, 8)
    net = tflearn.fully_connected(net, len(output[0]), activation="softmax")
    net = tflearn.regression(net)
    model = tflearn.DNN(net)
    model.load("MentalHealthChatBotmodel.tflearn")
    return model

chatbot_model = build_chatbot_model()

# Function: Bag of words
def bag_of_words(s, words):
    bag = [0 for _ in range(len(words))]
    s_words = word_tokenize(s)
    s_words = [stemmer.stem(word.lower()) for word in s_words if word.isalnum()]
    for se in s_words:
        for i, w in enumerate(words):
            if w == se:
                bag[i] = 1
    return np.array(bag)

# Chatbot response generator
def chatbot_response(message, history):
    history = history or []
    try:
        result = chatbot_model.predict([bag_of_words(message, words)])
        idx = np.argmax(result)
        tag = labels[idx]
        response = "I'm not sure how to respond to that 🤔"
        for intent in intents_data["intents"]:
            if intent["tag"] == tag:
                response = random.choice(intent["responses"])
                break
    except Exception as e:
        response = f"Error generating response: {str(e)} 💥"

    history.append({"role": "user", "content": f"💬 {message}"})
    history.append({"role": "assistant", "content": f"🤖 {response}"})
    return history, response

# Hugging Face transformers model for emotion detection
emotion_tokenizer = AutoTokenizer.from_pretrained("j-hartmann/emotion-english-distilroberta-base")
emotion_model = AutoModelForSequenceClassification.from_pretrained("j-hartmann/emotion-english-distilroberta-base")

# Detect emotion
def detect_emotion(user_input):
    pipe = pipeline("text-classification", model=emotion_model, tokenizer=emotion_tokenizer)
    try:
        result = pipe(user_input)
        emotion = result[0]["label"]
        emotion_map = {
            "joy": "😊 Joy",
            "anger": "😠 Anger",
            "sadness": "😢 Sadness",
            "fear": "😨 Fear",
            "surprise": "😲 Surprise",
            "neutral": "😐 Neutral",
        }
        return emotion_map.get(emotion, "Unknown Emotion 🤔")
    except Exception as e:
        return f"Error detecting emotion: {str(e)} 💥"

# Sentiment analysis using Hugging Face
sentiment_tokenizer = AutoTokenizer.from_pretrained("cardiffnlp/twitter-roberta-base-sentiment")
sentiment_model = AutoModelForSequenceClassification.from_pretrained("cardiffnlp/twitter-roberta-base-sentiment")

def analyze_sentiment(user_input):
    """Analyze sentiment of user input."""
    inputs = sentiment_tokenizer(user_input, return_tensors="pt")
    try:
        with torch.no_grad():
            outputs = sentiment_model(**inputs)
        sentiment = torch.argmax(outputs.logits, dim=1).item()
        sentiment_map = ["Negative 😔", "Neutral 😐", "Positive 😊"]
        return sentiment_map[sentiment]
    except Exception as e:
        return f"Error in sentiment analysis: {str(e)} 💥"

# Suggestions based on emotion
def generate_suggestions(emotion):
    suggestions = {
        "😊 Joy": [
            {"Title": "Mindful Meditation 🧘‍♂️", "Link": "https://www.helpguide.org/meditation"},
            {"Title": "Explore a new skill 🚀", "Link": "https://www.skillshare.com/"},
        ],
        "😢 Sadness": [
            {"Title": "Improve mental resilience ✨", "Link": "https://www.psychologytoday.com/"},
            {"Title": "Reach out to a therapist 💬", "Link": "https://www.betterhelp.com/"},
        ],
        "😠 Anger": [
            {"Title": "Anger Management Guide 🔥", "Link": "https://www.mentalhealth.org.uk/"},
            {"Title": "Calming Exercises 🌿", "Link": "https://www.calm.com/"},
        ],
    }
    return suggestions.get(emotion, [{"Title": "General Wellness Resources 🌈", "Link": "https://www.wellness.com/"}])

# Main App Function
def well_being_app(user_input, history):
    """Main function for chatbot, emotion detection, sentiment analysis, and suggestions."""
    # Chatbot response
    history, chatbot_reply = chatbot_response(user_input, history)

    # Emotion detection
    emotion = detect_emotion(user_input)

    # Sentiment analysis
    sentiment = analyze_sentiment(user_input)

    # Generating suggestions
    detected_emotion = emotion.split(": ")[-1]
    suggestions = generate_suggestions(detected_emotion)
    suggestions_df = pd.DataFrame(suggestions)

    return history, sentiment, emotion, suggestions_df

# Custom CSS for Beautification
custom_css = """
body {
    background: linear-gradient(135deg, #8e44ad, #3498db);
    font-family: 'Arial', sans-serif;
    color: white;
    text-align: center;
}
#component-0 span {
    color: #ffcccc;
}
button {
    background-color: #1abc9c;
    border: none;
    color: white;
    padding: 12px 24px;
    text-align: center;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
}
button:hover {
    background-color: #16a085;
}
"""

# Gradio UI
with gr.Blocks(css=custom_css) as interface:
    gr.Markdown("# 🌸 **Mental Health & Well-Being Assistant**")
    gr.Markdown("### Powered by NLP & AI")

    with gr.Row():
        user_input = gr.Textbox(lines=2, placeholder="How can I support you today?", label="Your Input")
        
    with gr.Row():
        submit_button = gr.Button("Submit", elem_id="submit")
    
    with gr.Row():
        chatbot_out = gr.Chatbot(label="Chat History")
        sentiment_out = gr.Textbox(label="Sentiment")
        emotion_out = gr.Textbox(label="Detected Emotion")
        
    with gr.Row():
        suggestions_out = gr.DataFrame(label="Suggestions", headers=["Title", "Link"])
    
    submit_button.click(
        well_being_app,
        inputs=[user_input, chatbot_out],
        outputs=[chatbot_out, sentiment_out, emotion_out, suggestions_out],
    )

# Launch App
interface.launch()