import requests
from bs4 import BeautifulSoup
import pandas as pd
import gradio as gr
import time

def get_rank_papers(url,progress=gr.Progress(track_tqdm=True)):
    base_url = "https://paperswithcode.com"

    session = requests.Session()
    headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3',
    'Cache-Control': 'no-cache'
    }
    print("Time run at : ",time.ctime())
    offset = 0
    data_list = {}
    break_duplicate = 10
    

    while True:
        response = session.get(url, headers=headers, params={'page': offset})
        if response.status_code != 200:
            print('Failed to retrieve data')
            break
        soup = BeautifulSoup(response.text, 'html.parser')
        paper_info = soup.find_all('div', class_='row infinite-item item paper-card')
        if not paper_info:
            break
        for ppr in paper_info:
            title = ppr.find('h1').text.strip()
            
            if "paper" in ppr.find('a')['href']:
                link = base_url + ppr.find('a')['href']
            else:
                link = ppr.find('a')['href'] 
            Github_Star = ppr.find('span', class_='badge badge-secondary').text.strip().replace(',', '')
            pdf_link = ''
            try:
                response_link  = session.get(link, headers=headers)
                soup_link = BeautifulSoup(response_link.text, 'html.parser')
                paper_info_link = soup_link.find_all('div', class_='paper-abstract')
                pdf_link = paper_info_link[0].find('div', class_='col-md-12').find('a')['href']
            except:
                pass
            if title not in data_list:
                data_list[title] = {'link': link, 'Github Star': int(Github_Star), 'pdf_link': pdf_link.strip()}
            else:
                break_duplicate -= 1
                if break_duplicate == 0:
                    return data_list
        offset += 1 
        progress.update(offset)
    print('Data retrieval complete')   
    return data_list

def reload_gradio_top():
    # Retrieve rank papers
    print('Retrieving data .. top papers')
    rank_paper_df = get_rank_papers(url="https://paperswithcode.com/")
    rank_paper_df = dict(sorted(rank_paper_df.items(), key=lambda x: x[1]['Github Star'], reverse=True))
    rank_paper_df = pd.DataFrame(rank_paper_df).T
    # Add title column
    rank_paper_df['title'] = rank_paper_df.index
    rank_paper_df = rank_paper_df[['title', 'Github Star', 'link', 'pdf_link']]
    # Convert link column to HTML links
    rank_paper_df['link'] = rank_paper_df['link'].apply(lambda x: f'<a href="{x}" target="_blank">Link</a>')  
    rank_paper_df['pdf_link'] = rank_paper_df['pdf_link'].apply(lambda x: f'<a href="{x}" target="_blank">{x}</a>')
    rank_paper = rank_paper_df.to_html(escape=False, index=False)
    return len(rank_paper_df),rank_paper


def reload_gradio_new():
    # Retrieve rank papers
    print('Retrieving data .. new papers')
    rank_paper_df = get_rank_papers(url="https://paperswithcode.com/latest")
    rank_paper_df = dict(sorted(rank_paper_df.items(), key=lambda x: x[1]['Github Star'], reverse=True))
    rank_paper_df = pd.DataFrame(rank_paper_df).T
    # Add title column
    rank_paper_df['title'] = rank_paper_df.index
    rank_paper_df = rank_paper_df[['title', 'Github Star', 'link', 'pdf_link']]
    # Convert link column to HTML links
    rank_paper_df['link'] = rank_paper_df['link'].apply(lambda x: f'<a href="{x}" target="_blank">Link</a>')  
    rank_paper_df['pdf_link'] = rank_paper_df['pdf_link'].apply(lambda x: f'<a href="{x}" target="_blank">{x}</a>')
    rank_paper = rank_paper_df.to_html(escape=False, index=False)
    return len(rank_paper_df),rank_paper


def reload_gradio_greatest():
    # Retrieve rank papers
    print('Retrieving data .. greatest papers')
    rank_paper_df = get_rank_papers(url="https://paperswithcode.com/greatest")
    rank_paper_df = dict(sorted(rank_paper_df.items(), key=lambda x: x[1]['Github Star'], reverse=True))
    rank_paper_df = pd.DataFrame(rank_paper_df).T
    # Add title column
    rank_paper_df['title'] = rank_paper_df.index
    rank_paper_df = rank_paper_df[['title', 'Github Star', 'link', 'pdf_link']]
    # Convert link column to HTML links
    rank_paper_df['link'] = rank_paper_df['link'].apply(lambda x: f'<a href="{x}" target="_blank">Link</a>')  
    rank_paper_df['pdf_link'] = rank_paper_df['pdf_link'].apply(lambda x: f'<a href="{x}" target="_blank">{x}</a>')
    rank_paper = rank_paper_df.to_html(escape=False, index=False)
    return len(rank_paper_df),rank_paper


with gr.Blocks() as demo:
    gr.Markdown("<h1><center>Papers Leaderboard</center>")
    with gr.Tab("Top Trending Papers"):
        button = gr.Button("Load Leaderboard")
        output = [gr.Textbox(label="Number of Papers Fetch"),
                  gr.HTML()]  
        button.click(fn=reload_gradio_top, inputs=None, outputs=output)
    with gr.Tab("New Papers"):
        button = gr.Button("Load Leaderboard")
        output = [gr.Textbox(label="Number of Papers Fetch"),
                  gr.HTML()]  
        button.click(fn=reload_gradio_new, inputs=None, outputs=output)
    with gr.Tab("Greatest Papers"):
        button = gr.Button("Load Leaderboard")
        output = [gr.Textbox(label="Number of Papers Fetch"),
                  gr.HTML()]  
        button.click(fn=reload_gradio_greatest, inputs=None, outputs=output)

# Launch the Gradio interface
demo.launch()