app.py

from fastapi import FastAPI
from pydantic import BaseModel
import pandas as pd
from sentence_transformers import SentenceTransformer
import chromadb
from fastapi.middleware.cors import CORSMiddleware
import uvicorn
import requests
from itertools import combinations
# Define FastAPI app
app = FastAPI()

origins = [
    "http://localhost:5173",
    "localhost:5173"
]


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

# Load the dataset and model at startup
df = pd.read_csv("hf://datasets/QuyenAnhDE/Diseases_Symptoms/Diseases_Symptoms.csv")
df['Symptoms'] = df['Symptoms'].str.split(',')
df['Symptoms'] = df['Symptoms'].apply(lambda x: [s.strip() for s in x])

model = SentenceTransformer('sentence-transformers/all-MiniLM-L6-v2')
client = chromadb.PersistentClient(path='./chromadb')
collection = client.get_or_create_collection(name="symptomsvector")

class SymptomQuery(BaseModel):
    symptom: str

# Endpoint to handle symptom query and return matching symptoms
@app.post("/find_matching_symptoms")
def find_matching_symptoms(query: SymptomQuery):
    # Generate embedding for the symptom query
    symptoms = query.symptom.split(',')
    all_results = []

    for symptom in symptoms:
        symptom = symptom.strip()
        query_embedding = model.encode([symptom])

        # Perform similarity search in ChromaDB
        results = collection.query(
            query_embeddings=query_embedding.tolist(),
            n_results=3  # Return top 3 similar symptoms for each symptom
        )
        all_results.extend(results['documents'][0])

    # Remove duplicates while preserving order
    matching_symptoms = list(dict.fromkeys(all_results))

    return {"matching_symptoms": matching_symptoms}

# Endpoint to handle symptom query and return matching diseases
@app.post("/find_matching_diseases")
def find_matching_diseases(query: SymptomQuery):
    # Generate embedding for the symptom query
    query_embedding = model.encode([query.symptom])

    # Perform similarity search in ChromaDB
    results = collection.query(
        query_embeddings=query_embedding.tolist(),
        n_results=5  # Return top 5 similar symptoms
    )

    # Extract matching symptoms
    matching_symptoms = results['documents'][0]

    # Filter diseases that match the symptoms
    matching_diseases = df[df['Symptoms'].apply(lambda x: any(s in matching_symptoms for s in x))]

    return {"matching_diseases": matching_diseases['Name'].tolist()}
all_symptoms=[]
all_selected_symptoms=[]
# Endpoint to handle symptom query and return detailed disease list
@app.post("/find_disease_list")
def find_disease_list(query: SymptomQuery):
    # Generate embedding for the symptom query
    query_embedding = model.encode([query.symptom])

    # Perform similarity search in ChromaDB
    results = collection.query(
        query_embeddings=query_embedding.tolist(),
        n_results=5  # Return top 5 similar symptoms
    )

    # Extract matching symptoms
    matching_symptoms = results['documents'][0]
    all_symptoms.append(matching_symptoms)
    # Filter diseases that match the symptoms
    matching_diseases = df[df['Symptoms'].apply(lambda x: any(s in matching_symptoms for s in x))]

    # Create a list of disease information
    disease_list = []
    symptoms_list = []
    unique_symptoms_list = []
    for _, row in matching_diseases.iterrows():
        disease_info = {
            'Disease': row['Name'],
            'Symptoms': row['Symptoms'],
            'Treatments': row['Treatments']
        }
        disease_list.append(disease_info)
        symptoms_info = row['Symptoms']
        symptoms_list.append(symptoms_info)
    for i in range(len(symptoms_list)):
        for j in range(len(symptoms_list[i])):
            if symptoms_list[i][j] not in unique_symptoms_list:
                unique_symptoms_list.append(symptoms_list[i][j].lower())
    return {"disease_list": disease_list, "unique_symptoms_list": unique_symptoms_list}

class SelectedSymptomsQuery(BaseModel):
    selected_symptoms: list

@app.post("/find_disease")
def find_disease(query: SelectedSymptomsQuery):
    SelectedSymptoms = query.selected_symptoms
    all_selected_symptoms.extend(SelectedSymptoms)

    disease_list = []
    symptoms_list = []
    unique_symptoms_set = set()  # Use a set for unique symptoms

    # Combine all the symptoms we already know (all_symptoms + selected symptoms)
    known_symptoms = {symptom.lower() for symptom_set in all_symptoms for symptom in symptom_set}
    known_symptoms.update([symptom.lower() for symptom in SelectedSymptoms])

    # Generate combinations of symptoms from all_symptoms and selected symptoms
    for symptoms_set in all_symptoms:
        for i in range(1, len(symptoms_set) + 1):  # Generate combinations with all lengths
            for symptom_combination in combinations(symptoms_set, i):
                temp = list(symptom_combination) + SelectedSymptoms  # Combine with selected symptoms
                
                # Search for diseases that match the combination
                matching_diseases = df[df['Symptoms'].apply(lambda x: all(s in x for s in temp))]

                for _, row in matching_diseases.iterrows():
                    disease_info = {
                        'Disease': row['Name'],
                        'Symptoms': row['Symptoms'],
                        'Treatments': row['Treatments']
                    }
                    disease_list.append(disease_info)

                    # Add each symptom in lowercase to the set
                    for symptom in row['Symptoms']:
                        if symptom.lower() not in known_symptoms:
                            unique_symptoms_set.add(symptom.lower())

    # Convert the set back to a list for the response
    unique_symptoms_list = list(unique_symptoms_set)

    return {
        "unique_symptoms_list": unique_symptoms_list,
        "all_selected_symptoms": all_selected_symptoms,
        "all_symptoms": all_symptoms,
        "disease_list": disease_list
    }
class DiseaseListQuery(BaseModel):
    disease_list: list

class DiseaseDetail(BaseModel):
    Disease: str
    Symptoms: list
    Treatments: str
    MatchCount: int

@app.post("/pass2llm")
def pass2llm(query: DiseaseDetail):
    # Prepare the data to be sent to the LLM API
    disease_list_details = query

    # Make the API request to the Ngrok endpoint to get the public URL
    headers = {
        "Authorization": "Bearer 2npJaJjnLBj1RGPcGf0QiyAAJHJ_5qqtw2divkpoAipqN9WLG",
        "Ngrok-Version": "2"
    }
    response = requests.get("https://api.ngrok.com/endpoints", headers=headers)

    # Check if the request was successful
    if response.status_code == 200:
        llm_api_response = response.json()
        public_url = llm_api_response['endpoints'][0]['public_url']

        # Prepare the prompt with the disease list details
        prompt = f"Here is a list of diseases and their details: {disease_list_details}. Please generate a summary."

        # Make the request to the LLM API
        llm_headers = {
            "Content-Type": "application/json"
        }
        llm_payload = {
            "model": "llama3",
            "prompt": prompt,
            "stream": False
        }
        llm_response = requests.post(f"{public_url}/api/generate", headers=llm_headers, json=llm_payload)

        # Check if the request to the LLM API was successful
        if llm_response.status_code == 200:
            llm_response_json = llm_response.json()
            return {"message": "Successfully passed to LLM!", "llm_response": llm_response_json.get("response")}
        else:
            return {"message": "Failed to get response from LLM!", "error": llm_response.text}
    else:
        return {"message": "Failed to get public URL from Ngrok!", "error": response.text}
# To run the FastAPI app with Uvicorn
# if __name__ == "__main__":
#     uvicorn.run(app, host="0.0.0.0", port=8000)