import os
import csv
import json
import docx
import pptx
import re
import nltk
import time
import PyPDF2
import tempfile
import openpyxl
import requests
import gradio as gr
from bs4 import BeautifulSoup
import xml.etree.ElementTree as ET
from nltk.tokenize import word_tokenize
from langchain_community.vectorstores import FAISS
from youtube_transcript_api import YouTubeTranscriptApi
from langchain.schema import SystemMessage, HumanMessage, AIMessage
from langchain_huggingface import HuggingFaceEndpoint, ChatHuggingFace
from langchain_community.embeddings import SentenceTransformerEmbeddings
from youtube_transcript_api._errors import NoTranscriptFound, TranscriptsDisabled, VideoUnavailable
nltk.download('punkt')
nltk.download('omw-1.4')
nltk.download('wordnet')

def read_csv(file_path):
    with open(file_path, 'r', encoding='utf-8', errors='ignore', newline='') as csvfile:
        csv_reader = csv.reader(csvfile)
        csv_data = [row for row in csv_reader]
    return ' '.join([' '.join(row) for row in csv_data])

def read_text(file_path):
    with open(file_path, 'r', encoding='utf-8', errors='ignore',  newline='') as f:
        return f.read()

def read_pdf(file_path):
    text_data = []
    with open(file_path, 'rb') as pdf_file:
        pdf_reader = PyPDF2.PdfReader(pdf_file)
        for page in pdf_reader.pages:
            text_data.append(page.extract_text())
    return '\n'.join(text_data)

def read_docx(file_path):
    doc = docx.Document(file_path)
    return '\n'.join([paragraph.text for paragraph in doc.paragraphs])

def read_pptx(file_path):
    ppt = pptx.Presentation(file_path)
    text_data = ''
    for slide in ppt.slides:
        for shape in slide.shapes:
            if hasattr(shape, "text"):
                text_data += shape.text + '\n'
    return text_data

def read_xlsx(file_path):
    workbook = openpyxl.load_workbook(file_path)
    sheet = workbook.active
    text_data = ''
    for row in sheet.iter_rows(values_only=True):
        text_data += ' '.join([str(cell) for cell in row if cell is not None]) + '\n'
    return text_data

def read_json(file_path):
    with open(file_path, 'r') as f:
        json_data = json.load(f)
    return json.dumps(json_data)

def read_html(file_path):
    with open(file_path, 'r') as f:
        html_content = f.read()
    soup = BeautifulSoup(html_content, 'html.parser')
    return soup

def read_xml(file_path):
    tree = ET.parse(file_path)
    root = tree.getroot()
    return ET.tostring(root, encoding='unicode')

def process_youtube_video(url, languages=['en', 'ar']):
    if 'youtube.com/watch' in url or 'youtu.be/' in url:
        try:
            if "v=" in url:
                video_id = url.split("v=")[1].split("&")[0]
            elif "youtu.be/" in url:
                video_id = url.split("youtu.be/")[1].split("?")[0]
            else:
                return "Invalid YouTube video URL. Please provide a valid YouTube video link."

            response = requests.get(f"http://img.youtube.com/vi/{video_id}/mqdefault.jpg")
            if response.status_code != 200:
                return "Video doesn't exist."

            transcript_data = []
            for lang in languages:
                try:
                    transcript = YouTubeTranscriptApi.get_transcript(video_id, languages=[lang])
                    transcript_data.append(' '.join([entry['text'] for entry in transcript]))
                except (NoTranscriptFound, TranscriptsDisabled, VideoUnavailable):
                    continue

            return ' '.join(transcript_data) if transcript_data else "Please choose a YouTube video with available English or Arabic transcripts."

        except Exception as e:
            return f"An error occurred: {e}"
    else:
        return "Invalid YouTube URL. Please provide a valid YouTube link."

def read_web_page(url):
    result = requests.get(url)
    if result.status_code == 200:
        src = result.content
        soup = BeautifulSoup(src, 'html.parser')
        text_data = ''
        for p in soup.find_all('p'):
            text_data += p.get_text() + '\n'
        return text_data
    else:
        return "Please provide a valid webpage link"

def read_data(file_path_or_url, languages=['en', 'ar']):
    if file_path_or_url.endswith('.csv'):
        return read_csv(file_path_or_url)
    elif file_path_or_url.endswith('.txt'):
        return read_text(file_path_or_url)
    elif file_path_or_url.endswith('.pdf'):
        return read_pdf(file_path_or_url)
    elif file_path_or_url.endswith('.docx'):
        return read_docx(file_path_or_url)
    elif file_path_or_url.endswith('.pptx'):
        return read_pptx(file_path_or_url)
    elif file_path_or_url.endswith('.xlsx'):
        return read_xlsx(file_path_or_url)
    elif file_path_or_url.endswith('.json'):
        return read_json(file_path_or_url)
    elif file_path_or_url.endswith('.html'):
        return read_html(file_path_or_url)
    elif file_path_or_url.endswith('.xml'):
        return read_xml(file_path_or_url)
    elif 'youtube.com/watch' in file_path_or_url or 'youtu.be/' in file_path_or_url:
        return process_youtube_video(file_path_or_url, languages)
    elif file_path_or_url.startswith('http'):
        return read_web_page(file_path_or_url)
    else:
        return "Unsupported type or format."

def normalize_text(text):
    text = re.sub("\*?", "", text)
    text = text.lower()
    text = text.strip()
    punctuation = '''!()[]{};:'"\<>/?$%^&*_`~='''
    for punc in punctuation:
        text = text.replace(punc, "")
    text = re.sub(r'[A-Za-z0-9]*@[A-Za-z]*\.?[A-Za-z0-9]*', "", text)
    words = word_tokenize(text)
    return ' '.join(words)

llm = HuggingFaceEndpoint(
    repo_id="mistralai/Mistral-7B-Instruct-v0.2",
    task="text-generation",
    max_new_tokens=4096,
    temperature=0.6,
    top_p=0.9,
    top_k=40,
    repetition_penalty=1.2,
    do_sample=True,
)
chat_model = ChatHuggingFace(llm=llm)

model_name = "sentence-transformers/all-mpnet-base-v2"
embedding_llm = SentenceTransformerEmbeddings(model_name=model_name)
db = FAISS.load_local("faiss_index", embedding_llm, allow_dangerous_deserialization=True)

def print_like_dislike(x: gr.LikeData):
    print(x.index, x.value, x.liked)

def user(user_message, history):
  if not len(user_message):
    raise gr.Error("Chat messages cannot be empty")
  return "", history + [[user_message, None]]

def user2(user_message, history, link):
    if not len(user_message) or not len(link):
        raise gr.Error("Chat messages or links cannot be empty")
    combined_message = f"{link}\n{user_message}"
    return "", history + [[combined_message, None]], link

def user3(user_message, history, file_path):
    if not len(user_message) or not file_path:
        raise gr.Error("Chat messages or flies cannot be empty")
    combined_message = f"{file_path}\n{user_message}"
    return "", history + [[combined_message, None]], file_path

messages1 = [
    HumanMessage(content="You are a helpful assistant."),
    AIMessage(content="Sure, how can I assist you today?")]
messages2 = messages1.copy()
messages3 = messages1.copy()
messages4 = messages1.copy()
messages5 = messages1.copy()
    
def Chat_Message(history):
    global messages1

    message=HumanMessage(content=history[-1][0])
    messages1.append(message)
    response = chat_model.invoke(messages1)
    messages1.append(AIMessage(content=response.content))

    if len(messages1) >= 8:
      messages1 = messages1[-8:]

    history[-1][1] = ""

    history[-1][1] += response.content

    return history

def Web_Search(history):
    global messages2

    message=history[-1][0]

    similar_docs = db.similarity_search(message, k=3)

    if similar_docs:
        source_knowledge = "\n".join([x.page_content for x in similar_docs])
    else:
        source_knowledge = ""

    augmented_prompt = f"""
    You are an AI designed to help understand and extract information from provided Search Content. Based on the user's Query, you may need to summarize the text, answer specific questions, or provide guidance.
    Query: {message}
    Search Content:
    {source_knowledge}

    #If the query is not related to specific Search Content, engage in general conversation or provide relevant information from other sources.
    """

    msg=HumanMessage(content=augmented_prompt)
    messages2.append(msg)
    response = chat_model.invoke(messages2)
    messages2.append(AIMessage(content=response.content))

    if len(messages2) >= 8:
      messages2 = messages2[-8:]

    history[-1][1] = ""

    history[-1][1] += response.content

    return history

def Chart_Generator(history):
    global messages3

    message = history[-1][0]
    if '#chart' in message:
        message = message.split('#chart', 1)[1].strip()
        chart_url = f"https://quickchart.io/natural/{message}"
        response = requests.get(chart_url)

        if response.status_code == 200:
            image_html = f'<img src="{chart_url}" alt="Generated Chart" style="display: block; margin: auto; max-width: 100%; max-height: 100%;">'
            message_with_description = f"Describe and analyse the content of this chart: {chart_url}"
    
            prompt = HumanMessage(content=message_with_description)
            messages3.append(prompt)
    
            response = chat_model.invoke(messages3)
            messages3.append(AIMessage(content=response.content))
    
            if len(messages3) >= 8:
                messages3 = messages3[-8:]
    
            combined_content = f'{image_html}<br>{response.content}'
        else:
            response_text = "Can't generate this image. Please provide valid chart details."
            combined_content = response_text
    else:
        prompt = HumanMessage(content=message)
        messages3.append(prompt)
    
        response = chat_model.invoke(messages3)
        messages3.append(AIMessage(content=response.content))
    
        if len(messages3) >= 8:
            messages3 = messages3[-8:]

        combined_content=response.content
        
    history[-1][1] = ""

    history[-1][1] += combined_content

    return history

def Link_Scratch(history):
    global messages4

    combined_message = history[-1][0]

    link = ""
    user_message = ""
    if "\n" in combined_message:
        link, user_message = combined_message.split("\n", 1)
        link = link.strip()
        user_message = user_message.strip()

    result = read_data(link)

    if result in ["Unsupported type or format.", "Please provide a valid webpage link",
                  "Invalid YouTube URL. Please provide a valid YouTube link.",
                  "Please choose a YouTube video with available English or Arabic transcripts.",
                  "Invalid YouTube video URL. Please provide a valid YouTube video link."]:
        response_message = result
    else:
        content_data = normalize_text(result)
        if not content_data:
            response_message = "The provided link is empty or does not contain any meaningful words."
        else:
            augmented_prompt = f"""
            You are an AI designed to help understand and extract information from provided Link Content. Based on the user's Query, you may need to summarize the text, answer specific questions, or provide guidance.
            Query: {user_message}
            Link Content:
            {content_data}

            #If the query is not related to specific Link Content, engage in general conversation or provide relevant information from other sources.
            """
            message = HumanMessage(content=augmented_prompt)
            messages4.append(message)
            response = chat_model.invoke(messages4)
            messages4.append(AIMessage(content=response.content))

            if len(messages4) >= 1:
                messages4 = messages4[-1:]

            response_message = response.content

    history[-1][1] = ""

    history[-1][1] += response_message

    return history

def insert_line_breaks(text, every=8):
    return '\n'.join(text[i:i+every] for i in range(0, len(text), every))

def display_file_name(file):
    supported_extensions = ['.csv', '.txt', '.pdf', '.docx', '.pptx', '.xlsx', '.json', '.html', '.xml']
    file_extension = os.path.splitext(file.name)[1]
    if file_extension.lower() in supported_extensions:
      file_name = os.path.basename(file.name)
      file_name_with_breaks = insert_line_breaks(file_name)
      icon_url = "https://img.icons8.com/ios-filled/50/0000FF/file.png"
      return f"<div style='display: flex; align-items: center;'><img src='{icon_url}' alt='file-icon' style='width: 20px; height: 20px; margin-right: 5px;'><b style='color:blue;'>{file_name_with_breaks}</b></div>"
    else:
      raise gr.Error("( Supported File Types Only : PDF , CSV , TXT , DOCX , PPTX , XLSX , JSON , HTML , XML )")

def File_Interact(history,filepath):
    global messages5

    combined_message = history[-1][0]
    
    link = ""
    user_message = ""
    if "\n" in combined_message:
      link, user_message = combined_message.split("\n", 1)
      user_message = user_message.strip()

    result = read_data(filepath)

    if result == "Unsupported type or format.":
        response_message = result
    else:
        content_data = normalize_text(result)
        if not content_data:
            response_message = "The file is empty or does not contain any meaningful words."
        else:
            augmented_prompt = f"""
            You are an AI designed to help understand and extract information from provided File Content. Based on the user's Query, you may need to summarize the text, answer specific questions, or provide guidance.
            Query: {user_message}
            File Content:
            {content_data}

            #If the query is not related to specific File Content, engage in general conversation or provide relevant information from other sources.
            """
            message = HumanMessage(content=augmented_prompt)
            messages5.append(message)
            response = chat_model.invoke(messages5)
            messages5.append(AIMessage(content=response.content))

            if len(messages5) >= 1:
                messages5 = messages5[-1:]

            response_message = response.content

    history[-1][1] = ""

    history[-1][1] += response_message

    return history

with gr.Blocks(theme=gr.themes.Soft()) as demo:
  with gr.Row():
    gr.Markdown("""<span style='font-weight: bold; color: blue; font-size: large;'>Choose Your Mode</span>""")
    gr.Markdown("""<div style='margin-left: -120px;'><span style='font-weight: bold; color: blue; font-size: xx-large;'>IT ASSISTANT</span></div>""")

  with gr.Tab("Chat-Message"):
    chatbot = gr.Chatbot(
          [],
          elem_id="chatbot",
          bubble_full_width=False,
          height=500,
          placeholder="<span style='font-weight: bold; color: blue; font-size: x-large;'>Feel Free To Ask Me Anything Or Start A Conversation On Any Topic...</span>"
      )
    with gr.Row():
      msg = gr.Textbox(show_label=False, placeholder="Type a message...", scale=10, container=False)
      submit = gr.Button("➡️Send", scale=1)

    clear = gr.ClearButton([msg, chatbot])

    msg.submit(user, [msg, chatbot], [msg, chatbot], queue=True).then(Chat_Message, chatbot, chatbot)
    submit.click(user, [msg, chatbot], [msg, chatbot], queue=True).then(Chat_Message, chatbot, chatbot)
    chatbot.like(print_like_dislike, None, None)

  with gr.Tab("Web-Search"):
    chatbot = gr.Chatbot(
        [],
        elem_id="chatbot",
        bubble_full_width=False,
        height=500,
        placeholder="<span style='font-weight: bold; color: blue; font-size: x-large;'>Demand What You Seek, And I'll Search The Web For The Most Relevant Information...</span>"
    )
    with gr.Row():
      msg = gr.Textbox(show_label=False, placeholder="Type a message...", scale=10, container=False)
      submit = gr.Button("➡️Send", scale=1)

    clear = gr.ClearButton([msg, chatbot])

    msg.submit(user, [msg, chatbot], [msg, chatbot], queue=True).then(Web_Search, chatbot, chatbot)
    submit.click(user, [msg, chatbot], [msg, chatbot], queue=True).then(Web_Search, chatbot, chatbot)
    chatbot.like(print_like_dislike, None, None)

  with gr.Tab("Chart-Generator"):
    chatbot = gr.Chatbot(
        [],
        elem_id="chatbot",
        bubble_full_width=False,
        height=500,
        placeholder="<span style='font-weight: bold; color: blue; font-size: x-large;'>Request Any Chart Or Graph By Giving The Data Or A Description, And I'll Create It...</span>"
    )

    with gr.Row():
      msg = gr.Textbox(show_label=False, placeholder="To generate a chart: type #chart [your chart description ]. To discuss the chart: type your message directly...", scale=10, container=False)
      submit = gr.Button("➡️Send", scale=1)

    clear = gr.ClearButton([msg, chatbot])

    msg.submit(user, [msg, chatbot], [msg, chatbot], queue=True).then(Chart_Generator, chatbot, chatbot)
    submit.click(user, [msg, chatbot], [msg, chatbot], queue=True).then(Chart_Generator, chatbot, chatbot)
    chatbot.like(print_like_dislike, None, None)

  with gr.Tab("Link-Scratch"):
    chatbot = gr.Chatbot(
        [],
        elem_id="chatbot",
        bubble_full_width=False,
        height=500,
        placeholder="<span style='font-weight: bold; color: blue; font-size: x-large;'>Provide A Link Of Web page Or YouTube Video And Inquire About Its Details...</span>"
    )

    with gr.Row():
        msg1 = gr.Textbox(show_label=False, placeholder="Paste your link...", scale=4, container=False)
        msg2 = gr.Textbox(show_label=False, placeholder="Type a message...", scale=7, container=False)
        submit = gr.Button("➡️Send", scale=1)

    clear = gr.ClearButton([msg2, chatbot, msg1])

    msg1.submit(user2, [msg2, chatbot, msg1], [msg2, chatbot, msg1], queue=True).then(Link_Scratch, chatbot, chatbot)
    msg2.submit(user2, [msg2, chatbot, msg1], [msg2, chatbot, msg1], queue=True).then(Link_Scratch, chatbot, chatbot)
    submit.click(user2, [msg2, chatbot, msg1], [msg2, chatbot, msg1], queue=True).then(Link_Scratch, chatbot, chatbot)
    chatbot.like(print_like_dislike, None, None)

  with gr.Tab("File-Interact"):
    chatbot = gr.Chatbot(
        [],
        elem_id="chatbot",
        bubble_full_width=False,
        height=500,
        placeholder="<span style='font-weight: bold; color: blue; font-size: x-large;'>Upload A File And Explore Questions Related To Its Content...</span><br>( Supported File Types Only : PDF , CSV , TXT , DOCX , PPTX , XLSX , JSON , HTML , XML )"
    )

    with gr.Column():
        with gr.Row():
            filepath = gr.UploadButton("Upload a file", file_count="single", scale=1)
            msg = gr.Textbox(show_label=False, placeholder="Type a message...", scale=7, container=False)
            submit = gr.Button("➡️Send", scale=1)
        with gr.Row():
            file_output = gr.HTML("<div style='height: 20px; width: 30px;'></div>")
            clear = gr.ClearButton([msg, filepath, chatbot,file_output],scale=6)

    filepath.upload(display_file_name, inputs=filepath, outputs=file_output)

    msg.submit(user3, [msg, chatbot, file_output], [msg, chatbot, file_output], queue=True).then(File_Interact, [chatbot, filepath],chatbot)
    submit.click(user3, [msg, chatbot, file_output], [msg, chatbot, file_output], queue=True).then(File_Interact, [chatbot, filepath],chatbot)
    chatbot.like(print_like_dislike, None, None)

demo.queue(max_size=5)
demo.launch(max_file_size="5mb",show_api=False)