import io
import tempfile
import jwt
import base64
from click import option
from jwt import ExpiredSignatureError, InvalidTokenError
from starlette import status
from functions import *
import pandas as pd
from fastapi import FastAPI, File, UploadFile, HTTPException
from pydantic import BaseModel
from fastapi.middleware.cors import CORSMiddleware
from src.api.speech_api import speech_translator_router
from functions import client as supabase
from urllib.parse import urlparse
import nltk


nltk.download('punkt_tab')

app = FastAPI(title="ConversAI", root_path="/api/v1")

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(speech_translator_router, prefix="/speech")


@app.post("/signup")
async def sign_up(email, username, password):
    res, _ = supabase.auth.sign_up(
        {"email": email, "password": password, "role": "user"}
    )

    user_id = res[1].id
    r_ = createUser(user_id=user_id, username=username, email=email)
    if r_.get('code') == 409:
        return r_
    elif r_.get('code') == 200:
        response = {
            "status": "success",
            "code": 200,
            "message": "Please check you email address for email verification",
        }
    else:
        response = {
            "status": "failed",
            "code": 400,
            "message": "Failed to sign up please try again later",
        }
    return response


@app.post("/session-check")
async def check_session(user_id: str):
    res = supabase.auth.get_session()
    if res == None:
        try:
            supabase.table("Stores").delete().eq(
                "StoreID", user_id
            ).execute()
            resp = supabase.auth.sign_out()

            response = {"message": "success", "code": 200, "Session": res}

            return response
        except Exception as e:
            raise HTTPException(status_code=400, detail=str(e))

    return res


@app.post("/get-user")
async def get_user(access_token):
    res = supabase.auth.get_user(jwt=access_token)
    return res


@app.post("/referesh-token")
async def refresh_token(refresh_token):
    res = supabase.auth.refresh_token(refresh_token)
    return res


@app.post("/login")
async def sign_in(email, password):
    try:
        res = supabase.auth.sign_in_with_password(
            {"email": email, "password": password}
        )
        user_id = res.user.id
        access_token = res.session.access_token
        refresh_token = res.session.refresh_token

        store_session_check = supabase.table("Stores").select("*").filter("StoreID", "eq", user_id).execute()
        store_id = None
        if store_session_check and store_session_check.data:
            store_id = store_session_check.data[0].get("StoreID")

        userData = supabase.table("ConversAI_UserInfo").select("*").filter("user_id", "eq", user_id).execute().data
        username = userData[0]["username"]

        if not store_id:
            response = (
                supabase.table("Stores").insert(
                    {
                        "AccessToken": access_token,
                        "StoreID": user_id,
                        "RefreshToken": refresh_token,
                        "email": email
                    }
                ).execute()
            )

            message = {
                "message": "Success",
                "code": status.HTTP_200_OK,
                "username": username,
                "user_id": user_id,
                "access_token": access_token,
                "refresh_token": refresh_token,
            }
            return message

        elif store_id == user_id:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail="You are already signed in. Please sign out first to sign in again."
            )

        else:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail="Failed to sign in. Please check your credentials."
            )

    except HTTPException as http_exc:
        raise http_exc

    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"An unexpected error occurred during sign-in: {str(e)}"
        )


@app.post("/login_with_token")
async def login_with_token(access_token: str, refresh_token: str):
    try:
        decoded_token = jwt.decode(access_token, options={"verify_signature": False})
        user_id_oauth = decoded_token.get("sub")
        try:
            user_id = supabase.table("ConversAI_UserInfo").select("*").filter("user_id", "eq", user_id_oauth).execute()
            user_id = supabase.table("ConversAI_UserInfo").select("*").filter("email", "eq", user_id_oauth).execute()

            user_name = user_id.data[0]["username"]

        except:
            user_name = ''

        json = {
            "code": status.HTTP_200_OK,
            "user_id": decoded_token.get("sub"),
            "email": decoded_token.get("email"),
            "access_token": access_token,
            "refresh_token": refresh_token,
            "issued_at": decoded_token.get("iat"),
            "expires_at": decoded_token.get("exp"),
            "username": user_name

        }
        return json

    except (ExpiredSignatureError, InvalidTokenError) as e:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail=str(e))


@app.post("/user_name")
async def user_name_(username: str, user_id: str):
    user_data = supabase.table("Stores").select("*").filter("StoreID", "eq", user_id).execute()
    email = user_data.data[0].get("email")
    r_ = createUser(user_id=user_id, username=username, email=email)
    return r_


@app.post("/set-session-data")
async def set_session_data(access_token, refresh_token, user_id):
    res = supabase.auth.set_session(access_token, refresh_token)
    store_session_check = supabase.table("Stores").select("*").filter("StoreID", "eq", user_id).execute()
    store_id = None
    if store_session_check and store_session_check.data:
        store_id = store_session_check.data[0].get("StoreID")
    if not store_id:
        response = (
            supabase.table("Stores").insert(
                {
                    "AccessToken": access_token,
                    "StoreID": user_id,
                    "RefreshToken": refresh_token,
                }
            ).execute()
        )
    res = {
        "message": "success",
        "code": 200,
        "session_data": res,
    }
    return res


@app.post("/logout")
async def sign_out(user_id):
    try:
        supabase.table("Stores").delete().eq(
            "StoreID", user_id
        ).execute()
        res = supabase.auth.sign_out()
        response = {"message": "success"}

        return response
    except Exception as e:
        raise HTTPException(status_code=400, detail=str(e))


@app.post("/oauth")
async def oauth():
    res = supabase.auth.sign_in_with_oauth(
        {"provider": "google", "options": {"redirect_to": "https://convers-ai-lac.vercel.app/"}})
    return res


@app.post("/newChatbot")
async def newChatbot(chatbotName: str, username: str):
    currentBotCount = len(listTables(username=username)["output"])
    limit = supabase.table("ConversAI_UserConfig").select("chatbotLimit").eq("user_id", username).execute().data[0][
        "chatbotLimit"]
    if currentBotCount >= int(limit):
        return {
            "output": "CHATBOT LIMIT EXCEEDED"
        }
    supabase.table("ConversAI_ChatbotInfo").insert({"user_id": username, "chatbotname": chatbotName}).execute()
    chatbotName = f"convai${username}${chatbotName}"
    return createTable(tablename=chatbotName)


@app.post("/loadPDF")
async def addPDFData(vectorstore: str, pdf: UploadFile = File(...)):
    source = pdf.filename
    pdf = await pdf.read()
    with tempfile.NamedTemporaryFile(delete=False, suffix='.pdf') as temp_file:
        temp_file.write(pdf)
        temp_file_path = temp_file.name
    text = extractTextFromPdf(temp_file_path)
    os.remove(temp_file_path)
    return {
        "output": text,
        "source": source
    }


@app.post("/loadImagePDF")
async def returnText(pdf: UploadFile = File(...)):
    source = pdf.filename
    pdf = await pdf.read()
    text = getTextFromImagePDF(pdfBytes=pdf)
    return {
        "output": text,
        "source": source
    }


class AddText(BaseModel):
    vectorstore: str
    text: str
    source: str = "Text"


@app.post("/addText")
async def addText(addTextConfig: AddText):
    vectorstore, text, source = addTextConfig.vectorstore, addTextConfig.text, addTextConfig.source
    text = base64.b64decode(text.encode("utf-8")).decode("utf-8")
    username, chatbotname = vectorstore.split("$")[1], vectorstore.split("$")[2]
    df = pd.DataFrame(supabase.table("ConversAI_ChatbotInfo").select("*").execute().data)
    currentCount = df[(df["user_id"] == username) & (df["chatbotname"] == chatbotname)]["charactercount"].iloc[0]
    newCount = currentCount + len(text)
    limit = supabase.table("ConversAI_UserConfig").select("tokenLimit").eq("user_id", username).execute().data[0][
        "tokenLimit"]
    if newCount < int(limit):
        supabase.table("ConversAI_ChatbotInfo").update({"charactercount": str(newCount)}).eq("user_id", username).eq(
            "chatbotname", chatbotname).execute()
        output = addDocuments(text=text, source=source, vectorstore=vectorstore)
        return output
    else:
        return {
            "output": "WEBSITE EXCEEDING LIMITS, PLEASE TRY WITH A SMALLER DOCUMENT."
        }


class AddQAPair(BaseModel):
    vectorstore: str
    question: str
    answer: str


@app.post("/addQAPair")
async def addQAPairData(addQaPair: AddQAPair):
    username, chatbotname = addQaPair.vectorstore.split("$")[1], addQaPair.vectorstore.split("$")[2]
    df = pd.DataFrame(supabase.table("ConversAI_ChatbotInfo").select("*").execute().data)
    currentCount = df[(df["user_id"] == username) & (df["chatbotname"] == chatbotname)]["charactercount"].iloc[0]
    qa = f"QUESTION: {addQaPair.question}\tANSWER: {addQaPair.answer}"
    newCount = currentCount + len(qa)
    limit = supabase.table("ConversAI_UserConfig").select("tokenLimit").eq("user_id", username).execute().data[0][
        "tokenLimit"]
    if newCount < int(limit):
        supabase.table("ConversAI_ChatbotInfo").update({"charactercount": str(newCount)}).eq("user_id", username).eq(
            "chatbotname", chatbotname).execute()
        return addDocuments(text=qa, source="Q&A Pairs", vectorstore=addQaPair.vectorstore)
    else:
        return {
            "output": "WEBSITE EXCEEDING LIMITS, PLEASE TRY WITH A SMALLER DOCUMENT."
        }


@app.post("/loadWebURLs")
async def addWebsite(vectorstore: str, websiteUrls: list[str]):
    text = extractTextFromUrlList(urls=websiteUrls)    
    return {
        "output": text
    }


@app.post("/answerQuery")
async def answerQuestion(query: str, vectorstore: str, llmModel: str = "llama3-70b-8192"):
    username, chatbotName = vectorstore.split("$")[1], vectorstore.split("$")[2]
    output = answerQuery(query=query, vectorstore=vectorstore, llmModel=llmModel)
    response = (
        supabase.table("ConversAI_ChatHistory")
        .insert({"username": username, "chatbotName": chatbotName, "llmModel": llmModel, "question": query,
                 "response": output["output"]})
        .execute()
    )
    return output


@app.post("/deleteChatbot")
async def delete(chatbotName: str):
    username, chatbotName = chatbotName.split("$")[1], chatbotName.split("$")[2]
    supabase.table('ConversAI_ChatbotInfo').delete().eq('user_id', username).eq('chatbotname', chatbotName).execute()
    return deleteTable(tableName=chatbotName)


@app.post("/listChatbots")
async def delete(username: str):
    return listTables(username=username)


@app.post("/getLinks")
async def crawlUrl(baseUrl: str):
    return {
        "urls": getLinks(url=baseUrl, timeout=30),
        "source": urlparse(baseUrl).netloc
    }


@app.post("/getCurrentCount")
async def getCount(vectorstore: str):
    username, chatbotName = vectorstore.split("$")[1], vectorstore.split("$")[2]
    df = pd.DataFrame(supabase.table("ConversAI_ChatbotInfo").select("*").execute().data)
    return {
        "currentCount": df[(df['user_id'] == username) & (df['chatbotname'] == chatbotName)]['charactercount'].iloc[0]
    }


@app.post("/getYoutubeTranscript")
async def getYTTranscript(urls: list[str]):
    return {
        "output": getTranscript(urls=urls),
        "source": "www.youtube.com"
    }


@app.post("/analyzeData")
async def analyzeAndAnswer(query: str, file: UploadFile = File(...)):
    extension = file.filename.split(".")[-1]
    try:
        if extension in ["xls", "xlsx", "xlsm", "xlsb"]:
            df = pd.read_excel(io.BytesIO(await file.read()))
            response = analyzeData(query=query, dataframe=df)
        elif extension == "csv":
            df = pd.read_csv(io.BytesIO(await file.read()))
            response = analyzeData(query=query, dataframe=df)
        else:
            response = "INVALID FILE TYPE"
        return {
            "output": response
        }
    except:
        return {
            "output": "UNABLE TO ANSWER QUERY"
        }


@app.post("/getChatHistory")
async def chatHistory(vectorstore: str):
    username, chatbotName = vectorstore.split("$")[1], vectorstore.split("$")[2]
    response = supabase.table("ConversAI_ChatHistory").select("timestamp", "question", "response").eq("username",
                                                                                                      username).eq(
        "chatbotName", chatbotName).execute().data
    return response