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from controller.imports import *

import logging
from datetime import datetime
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

app = FastAPI()
app.mount('/gamification',gamification)





@app.get("/courses",tags=["Scrape"])
def get_course(query):
# Example search query
    results = google_search(query, API_KEY, CX)
    content=[]
   
    if results:
        for item in results.get('items', []):
            title = item.get('title')
            link = item.get('link')
            snippet = item.get('snippet')
            provider = extract_provider(link)
            content_structure={}
            
            content_structure["courseTitle"]=title
            content_structure["courseLink"]=link
            content_structure["courseSnippet"]= snippet
            content_structure["provider"]= provider
            content_structure["scrapedCourseDetails"]= scrapeCourse(url=link)
            content.append(content_structure)
        
    
    return JSONResponse(content,status_code=200) 
            





@app.post("/ai/upload",tags=["AI"])
async def upload_file(file: UploadFile = File(...),authorization: str = Header(...)):
     # Extract the token from the Authorization header (Bearer token)
    token = authorization.split("Bearer ")[-1]
    
      
    decoded_user_id,decoded_access_token = decode_jwt(token) 
    is_valid = verify_access_token(db_uri=MONGO_URI, user_id=decoded_user_id, access_token=decoded_access_token)
    if is_valid != True:  # Example check
        raise HTTPException(status_code=401, detail="Invalid token")
    else:
    
        content = await file.read()  # Read the file content (this will return bytes)
        sentences=[]

        print(f"File name: {file.filename}")
        print(f"File content type: {file.content_type}")
        print(f"File size: {file.size} bytes")
        
        
        if "pdf" == file.filename.split('.')[1]:
            pdf_document = fitz.open(stream=BytesIO(content), filetype="pdf")
            extracted_text = ""
            for page_num in range(pdf_document.page_count):
                page = pdf_document.load_page(page_num)
                extracted_text += page.get_text()
                
        elif "docx" == file.filename.split('.')[1]:
            docx_file = BytesIO(content)
            doc = docx.Document(docx_file)
            extracted_text = ""
            for para in doc.paragraphs:
                extracted_text += para.text + "\n"
                
        sentences = split_text_into_chunks(extracted_text,chunk_size=200)
        docs = generate_embedding_for_user_resume(data=sentences,user_id=file.filename)
        response= insert_embeddings_into_pinecone_database(doc=docs,api_key=PINECONE_API_KEY,name_space=decoded_user_id)
        
        return {"name": file.filename,"response":str(response) }    



@app.post("/ai/ask",tags=["AI"])
def ask_ai_about_resume(req:AiAnalysis,authorization: str = Header(...)):
    # Retrieve context from your vector database
    token = authorization.split("Bearer ")[-1]
    
      
    decoded_user_id,decoded_access_token = decode_jwt(token) 
    is_valid = verify_access_token(db_uri=MONGO_URI, user_id=decoded_user_id, access_token=decoded_access_token)
    if is_valid != True:  # Example check
        raise HTTPException(status_code=401, detail="Invalid token")
    
    context = query_vector_database(query=req.Query, api_key=PINECONE_API_KEY, name_space=decoded_user_id)
    
    # Ensure that an event loop is present in this thread.
    try:
        loop = asyncio.get_event_loop()
    except RuntimeError:
        loop = asyncio.new_event_loop()
        asyncio.set_event_loop(loop)
    
    # Create the Gemini client after the event loop is set up
    client = genai.Client(api_key=GEMINI_API_KEY)
    
    response = client.models.generate_content(
        model="gemini-2.0-flash", 
        contents=f"""
        Answer this question using the context provided:
        question: {req.Query}
        context: {context}
        """
    )
    
    return {"Ai_Response":response.text}

@app.post("/ai/recommend",tags=["AI"])
def ask_ai_to_recommnd_courses(request:UserCourse,authorization:str=Header(...)):
    """
    """
    

    # Extract the token from the Authorization header (Bearer token)
    token = authorization.split("Bearer ")[-1]
    
      
    decoded_user_id,decoded_access_token = decode_jwt(token) 
    is_valid = verify_access_token(db_uri=MONGO_URI, user_id=decoded_user_id, access_token=decoded_access_token)
    if is_valid != True:
        raise HTTPException(status_code=401, detail="Invalid token")
    
    # Ensure that an event loop is present in this thread.
    try:
        loop = asyncio.get_event_loop()
    except RuntimeError:
        loop = asyncio.new_event_loop()
        asyncio.set_event_loop(loop)
    
    # # Create the Gemini client after the event loop is set up
    # client = genai.Client(api_key=GEMINI_API_KEY)
    
    # response = client.models.generate_content(
        #  model="gemini-2.0-flash", 
        #  contents=f"""
        #  please respond with a JSON object that contains the following keys as a response:
        #  - "coursename": the name of the recommended course,
        #  - "completiontime": an estimate of how long it would take to complete the course.
        #  Do not include any extra text.
        #  Recommend a course using this information below :
        #  Which of the following best describes you?: {request.employmentStatus}
        #  Would you like to prepare for an interim role to gain experience and income while pursuing your dream job?: {request.interimRole}
        #  What is your desired role?: {request.dreamRole}
        #  Why do you want to achieve this desired role?: {request.motivation}
        #  How do you prefer to learn new skills?: {request.learningPreference}
        #  How many hours per day can you dedicate to learning?: {request.timeCommitmentPerDay}
        #  What are the biggest challenges or obstacles you face in reaching your dream role?: {request.challenges}
        #  What is your ideal timeframe for achieving your dream role?: {request.timeframeToAchieveDreamRole}
        
    
        #  """
    # )
    questions=request.model_dump()
    questions['userId']=decoded_user_id
    create_questionaire(db_uri=MONGO_URI,db_name="crayonics",collection_name="Questionaire",document=questions)
    # course_info = extract_course_info(response.text)
    # courses = get_course_func(query=course_info.courseName)
    return {"courseInfo":"course_info","courses":"courses"}



@app.post("/auth/login",tags=["Authentication"])
def login(user:UserBody):
    user ={"email":user.email,"password":user.password,"firstName":user.firstName,"lastName":user.lastName}
    print(user)
    user_id= login_user(db_uri=MONGO_URI,db_name="crayonics",collection_name="users",document=user)
    
    if user_id != False:
        refreshToken=create_refreshToken(db_uri=MONGO_URI,user_id=user_id)
        accessToken = create_accessToken(db_uri=MONGO_URI,user_id=user_id,refresh_token=refreshToken)
        result = update_refreshTokenWithPreviouslyUsedAccessToken(db_uri=MONGO_URI,refresh_token=refreshToken,access_token=accessToken)
        print(result)
        access_token = encode_jwt(user_id=user_id,access_token=accessToken)
        return {"refreshToken":refreshToken,"accessToken":access_token}
    return JSONResponse(status_code=401,content={"detail":"Invalid login details"})


@app.post("/auth/signup",tags=["Authentication"])
def signUp(user:UserBody):
    user ={"email":user.email,"password":user.password,"first_name":user.firstName,"last_name":user.lastName}
    user_id= create_user(db_uri=MONGO_URI,db_name="crayonics",collection_name="users",document=user)
    if user_id != False:
        refreshToken=create_refreshToken(db_uri=MONGO_URI,user_id=user_id)
        accessToken = create_accessToken(db_uri=MONGO_URI,user_id=user_id,refresh_token=refreshToken)
        result = update_refreshTokenWithPreviouslyUsedAccessToken(db_uri=MONGO_URI,refresh_token=refreshToken,access_token=accessToken)
        print(result)
        access_token = encode_jwt(user_id=user_id,access_token=accessToken)
        return {"refreshToken":refreshToken,"accessToken":access_token}
    return JSONResponse(status_code=status.HTTP_226_IM_USED,content="user already Exists")




@app.post("/auth/logout",tags=["Authentication"])
def logout(refresh:Token,authorization: str = Header(...)):
    
    token = authorization.split("Bearer ")[-1]
    
    decoded_user_id,decoded_access_token = decode_jwt(token) 
    is_valid = verify_access_token(db_uri=MONGO_URI, user_id=decoded_user_id, access_token=decoded_access_token)
    if is_valid != True:  # Example check
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token")
    
    result = logout_func(db_uri=MONGO_URI,refresh_token= refresh.refreshToken)
    if result ==True:
        return {"content": f"successful"}
    else:
        return JSONResponse(status_code=status.HTTP_410_GONE,content={"content": f"unsuccessful"})



@app.post("/auth/refresh",tags=["Authentication"])
def refresh_access_token(refresh_token:Token, authorization: str = Header(...)):
    
    token = authorization.split("Bearer ")[-1]
    
      
    decoded_user_id,decoded_access_token = decode_jwt(token)
    try: 
        is_valid = verify_refresh_access_token(db_uri=MONGO_URI, user_id=decoded_user_id, access_token=decoded_access_token,refresh_token=refresh_token.refreshToken)
        if is_valid != True:  # Example check
            raise HTTPException(status_code=401, detail="Invalid token")
        
        new_access_token = create_accessToken(db_uri=MONGO_URI,user_id=decoded_user_id,refresh_token=refresh_token.refreshToken)
        update_refreshTokenWithPreviouslyUsedAccessToken(db_uri=MONGO_URI,refresh_token=refresh_token.refreshToken,access_token=new_access_token)
        newly_encoded_access_token = encode_jwt(user_id=decoded_user_id,access_token=new_access_token) 
        return {"accessToken":newly_encoded_access_token}
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Most likely because the refresh token is wrong {e}")

@app.get("/user/user-details",tags=["user"])
def get_user_details(authorization: str = Header(...)):
    # Extract the token from the Authorization header (Bearer token)
    token = authorization.split("Bearer ")[-1]
    
      
    decoded_user_id,decoded_access_token = decode_jwt(token) 
    is_valid = verify_access_token(db_uri=MONGO_URI, user_id=decoded_user_id, access_token=decoded_access_token)
    if is_valid != True:  # Example check
        raise HTTPException(status_code=401, detail="Invalid token")
    doc = {"user_id":decoded_user_id}
    user_info = user_details_func(db_uri=MONGO_URI,document=doc)
    return { "userInfo": user_info}




@app.get("/protected-route")
def protected_route(authorization: str = Header(...)):
    # Extract the token from the Authorization header (Bearer token)
    token = authorization.split("Bearer ")[-1]
    
      
    decoded_user_id,decoded_access_token = decode_jwt(token) 
    is_valid = verify_access_token(db_uri=MONGO_URI, user_id=decoded_user_id, access_token=decoded_access_token)
    if is_valid != True:  # Example check
        raise HTTPException(status_code=401, detail="Invalid token")
    
    return {"message": "Access granted", "verification": "verified"}





def create_leaderboard_ranking( document: LeaderBoardRanking) -> bool:

    collection = db['LeaderBoard']
    # Insert the document
    result= collection.find_one_and_replace(filter={"userId":document.userId},replacement=document.model_dump())
    print(result)
    if result==None:
        result = collection.insert_one(document.model_dump())
        print("correctly inserted new document for",document.firstName)
        return True

    return False


    
def get_all_users(user_id =None) -> List:
    client = MongoClient(MONGO_URI)
    db = client.crayonics
    collection = db['users']
    # Insert the document
    if user_id==None:
        results= collection.find()
        if results:
            result = [result for result in  results]
            return result
        
        client.close()
    else:
        result = collection.find_one(filter={"_id":ObjectId(user_id)})
        return result


def get_user_id_from_docKey(dockId):
    client = MongoClient(MONGO_URI)
    db = client.crayonics
    collection = db['Points']
    # Insert the document 
    result = collection.find_one(filter={"_id":ObjectId(dockId)})
    client.close()
    return result['userId']

        
    
 
 
   
client = MongoClient(MONGO_URI)
db = client.crayonics
collection = db['Points']   

def handle_change2(new_point):
    logger.info(f"Extra info: {new_point}")
    print("No leaderboard so creating one now")

    users = get_all_users()
    
    for user in users:
        user_id = str(user['_id'])
        print("Inserting user", f"User ID: {user_id}")

        # Handle points retrieval safely
        try:
            points = get_all_simple_points_func(userId=user_id)
            print("Points:", points)
        except Exception as e:
            logger.error(f"Error processing points for user {user_id}: {e}")
            points = None  # Default value to prevent errors

        # Handle dream job retrieval safely
        tempDreamJob = None
        try:
            tempDreamJob = get_dream_job(userId=user_id)
        except Exception as e:
            logger.error(f"Error retrieving dream job for user {user_id}: {e}")

        # Assign default value if tempDreamJob is invalid
        dreamJob = tempDreamJob if isinstance(tempDreamJob, str) else "IncompleteProfile"

        # Try inserting into leaderboard
        try:
            create_leaderboard_ranking(LeaderBoardRanking(
                userId=user_id,
                firstName=user.get('first_name', 'Unknown'),  # Safer dict access
                lastName=user.get('last_name', 'Unknown'),
                totalpoints=points.totalpoints if points else 0,  # Prevent NoneType error
                lastUpdated=datetime.now(),
                careerPath=dreamJob,
            ))
        except Exception as e:
            logger.error(f"Error adding user {user_id} to leaderboard: {e}")


def handle_change3(userId:str):



    if not userId:
        raise ValueError("User ID not found in inserted document")

                # Fetch user details
    try:
        leveleduser = get_all_users(user_id=userId)
     
    except Exception as e:

        leveleduser = {}  # Default empty dict to prevent KeyError

        # Fetch user points
    try:
        points = get_all_simple_points_func(userId=userId)
     
    except Exception as e:
        logger.error(f"Error fetching points for userId {userId}: {e}")
        points = SimpleIndividualUserLevel(totalpoints=0)

        # Fetch dream job
    try:
        tempDreamJob = get_dream_job(userId=userId)
        print("========================================================")
        print("Temp dream job", tempDreamJob)
    except Exception as e:
        logger.error(f"Error fetching dream job for userId {userId}: {e}")
        tempDreamJob = None

        dreamJob = tempDreamJob if isinstance(tempDreamJob, str) else "IncompleteProfile"
        print("DreamJob", dreamJob)

        # Insert into leaderboard
    try:
        create_leaderboard_ranking(LeaderBoardRanking(
                        userId=userId,
                        firstName=leveleduser.get('first_name', 'Unknown'),
                        lastName=leveleduser.get('last_name', 'Unknown'),
                        totalpoints=points.totalpoints,
                        lastUpdated=datetime.now(),
                        careerPath=dreamJob,
                    ))
    except Exception as e:
        logger.error(f"Error adding user {userId} to leaderboard: {e}")

    except Exception as e:
                logger.error(f"Unexpected error processing change document: {e}")


# A function to handle changes
def handle_change(change=None):

    print("Change detected in point making changes immediately")
    logger.info(f"Change detected: {change}")
    # add everybodies points and add it to the leaderboard table
    collections = db.list_collection_names()
    if "LeaderBoard" not in collections:
        print("No leaderboard so creating one now")
        users = get_all_users()
        for user in users:
            print("inserting user",f"user id {user['_id']}")
            points = get_all_simple_points_func(userId=str(user['_id']))
            tempDreamJob =  get_dream_job(userId=str(user['_id'])) 
            
            dreamJob = tempDreamJob if type(tempDreamJob)==str else "IncompleteProfile"
            
            create_leaderboard_ranking(LeaderBoardRanking(userId=str(user['_id']),firstName=user['first_name'],lastName=user['last_name'],totalpoints=points.totalpoints,lastUpdated=datetime.now(),careerPath=dreamJob,))

    else:
        if change['operationType'] == 'insert':
            try:
                # Extract the full document
                full_document = change.get('fullDocument', {})
                user_id = full_document.get('userId')

                print("========================================================")
                print("Leveled User", user_id)

                if not user_id:
                    raise ValueError("User ID not found in inserted document")

                # Fetch user details
                try:
                    leveleduser = get_all_users(user_id=user_id)
                    print("========================================================")
                    print("Leveled User", leveleduser)
                except Exception as e:
                    logger.error(f"Error fetching user details for userId {user_id}: {e}")
                    leveleduser = {}  # Default empty dict to prevent KeyError

                # Fetch user points
                try:
                    points = get_all_simple_points_func(userId=user_id)
                    print("========================================================")
                    print("Points", points)
                except Exception as e:
                    logger.error(f"Error fetching points for userId {user_id}: {e}")
                    points = SimpleIndividualUserLevel(totalpoints=0)

                # Fetch dream job
                try:
                    tempDreamJob = get_dream_job(userId=user_id)
                    print("========================================================")
                    print("Temp dream job", tempDreamJob)
                except Exception as e:
                    logger.error(f"Error fetching dream job for userId {user_id}: {e}")
                    tempDreamJob = None

                dreamJob = tempDreamJob if isinstance(tempDreamJob, str) else "IncompleteProfile"
                print("DreamJob", dreamJob)

                # Insert into leaderboard
                try:
                    create_leaderboard_ranking(LeaderBoardRanking(
                        userId=user_id,
                        firstName=leveleduser.get('first_name', 'Unknown'),
                        lastName=leveleduser.get('last_name', 'Unknown'),
                        totalpoints=points.totalpoints,
                        lastUpdated=datetime.now(),
                        careerPath=dreamJob,
                    ))
                except Exception as e:
                    logger.error(f"Error adding user {user_id} to leaderboard: {e}")

            except Exception as e:
                logger.error(f"Unexpected error processing change document: {e}")
        elif change['operationType'] == 'update':
            try:
                # Extract the full document
                doc_id = str( change.get('documentKey')['_id'])

                print("========================================================")
                print("document Id", doc_id)
                user_id = get_user_id_from_docKey(doc_id)

                if not user_id:
                    raise ValueError("User ID not found in inserted document")

                # Fetch user details
                try:
                    leveleduser = get_all_users(user_id=user_id)
                    print("========================================================")
                    print("Leveled User", leveleduser)
                except Exception as e:
                    logger.error(f"Error fetching user details for userId {user_id}: {e}")
                    leveleduser = {}  # Default empty dict to prevent KeyError

                # Fetch user points
                try:
                    points = get_all_simple_points_func(userId=user_id)
                    print("========================================================")
                    print("Points", points)
                except Exception as e:
                    logger.error(f"Error fetching points for userId {user_id}: {e}")
                    points = SimpleIndividualUserLevel(totalpoints=0)

                # Fetch dream job
                try:
                    tempDreamJob = get_dream_job(userId=user_id)
                    print("========================================================")
                    print("Temp dream job", tempDreamJob)
                except Exception as e:
                    logger.error(f"Error fetching dream job for userId {user_id}: {e}")
                    tempDreamJob = None

                dreamJob = tempDreamJob if isinstance(tempDreamJob, str) else "IncompleteProfile"
                print("DreamJob", dreamJob)

                # Insert into leaderboard
                try:
                    create_leaderboard_ranking(LeaderBoardRanking(
                        userId=user_id,
                        firstName=leveleduser.get('first_name', 'Unknown'),
                        lastName=leveleduser.get('last_name', 'Unknown'),
                        totalpoints=points.totalpoints,
                        lastUpdated=datetime.now(),
                        careerPath=dreamJob,
                    ))
                except Exception as e:
                    logger.error(f"Error adding user {user_id} to leaderboard: {e}")

            except Exception as e:
                logger.error(f"Unexpected error processing change document: {e}")


                
    logger.info(f"Change detected:")

def watch_change_stream():
    with concurrent.futures.ThreadPoolExecutor(max_workers=10) as executor:  # Limited to 10 threads, because there are only 10 server worker 
        with collection.watch() as stream:
            for change in stream:
                # Submit the handle_change task to the thread pool
                executor.submit(handle_change, change)
# Start a background thread to watch the change stream
@app.on_event("startup")
def start_change_stream():
    threading.Thread(target=watch_change_stream, daemon=True).start()