import gradio as gr
from transformers import pipeline
import pandas as pd
import spaces

# Load dataset
from datasets import load_dataset
ds = load_dataset('ZennyKenny/demo_customer_nps')
df = pd.DataFrame(ds['train'])

# Initialize model pipeline
from huggingface_hub import login
import os

# Login using the API key stored as an environment variable
hf_api_key = os.getenv("API_KEY")
login(token=hf_api_key)

classifier = pipeline("text-classification", model="distilbert/distilbert-base-uncased-finetuned-sst-2-english")
generator = pipeline("text2text-generation", model="google/flan-t5-base")

# Function to classify customer comments
@spaces.GPU
def classify_comments(category_boxes):
    sentiments = []
    categories = []
    for comment in df['customer_comment']:
        sentiment = classifier(comment)[0]['label']
        category_list = [box for box in category_boxes if box.strip() != '']
        category_str = ', '.join([cat.strip() for cat in category_list])
        prompt = f"What category best describes this comment? '{comment}' Please answer using only the name of the category: {category_str}."
        category = generator(prompt, max_length=30)[0]['generated_text']
        categories.append(category)
        sentiments.append(sentiment)
    df['comment_sentiment'] = sentiments
    df['comment_category'] = categories
    return df[['customer_comment', 'comment_sentiment', 'comment_category']].to_html(index=False)

# Gradio Interface
with gr.Blocks() as nps:
    def add_category(category_list, new_category):
        if new_category.strip() != "":
            category_list.append(new_category.strip())  # Add new category
        return category_list

    def remove_category(category, category_list):
        category_list.remove(category)  # Remove selected category
        return category_list

    def display_categories(categories):
        category_components = []
        for i, cat in enumerate(categories):
            with gr.Row():
                gr.Markdown(f"- {cat}")
                remove_btn = gr.Button("X", elem_id=f"remove_{i}", interactive=True)
                remove_btn.click(
                    fn=lambda x=cat: remove_category(x, categories),
                    inputs=[],
                    outputs=category_boxes
                )
            category_components.append(gr.Row())
        return category_components

    category_boxes = gr.State([])  # Store category input boxes as state
    category_column = gr.Column()

    with gr.Row():
        category_input = gr.Textbox(label="New Category", placeholder="Enter category name")
        add_category_btn = gr.Button("Add Category")
        add_category_btn.click(
            fn=add_category,
            inputs=[category_boxes, category_input],
            outputs=category_boxes
        )
        category_boxes.change(
            fn=display_categories,
            inputs=category_boxes,
            outputs=category_column
        )

    uploaded_file = gr.File(label="Upload CSV", type="filepath")
    template_btn = gr.Button("Use Template")
    gr.Markdown("# NPS Comment Categorization")
    classify_btn = gr.Button("Classify Comments")
    output = gr.HTML()

    def load_data(file):
        if file is not None:
            file.seek(0)  # Reset file pointer
            import io
            if file.name.endswith('.csv'):
                custom_df = pd.read_csv(file, encoding='utf-8')
            else:
                return "Error: Uploaded file is not a CSV."
            if 'customer_comment' not in custom_df.columns:
                return "Error: Uploaded CSV must contain a column named 'customer_comment'"
            global df
            df = custom_df
            return "Custom CSV loaded successfully!"
        else:
            return "No file uploaded."

    uploaded_file.change(fn=load_data, inputs=uploaded_file, outputs=output)
    template_btn.click(fn=lambda: "Using Template Dataset", outputs=output)

    def use_template():
        return ["Product Experience", "Customer Support", "Price of Service", "Other"]

    template_btn.click(fn=use_template, outputs=category_boxes)
    category_boxes.change(fn=display_categories, inputs=category_boxes, outputs=category_column)
    classify_btn.click(fn=classify_comments, inputs=category_boxes, outputs=output)

nps.launch(share=True)