from datetime import timedelta
from fastapi import Depends, FastAPI, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from authentication import authenticate_user, Token, fake_users_db, ACCESS_TOKEN_EXPIRE_MINUTES, create_access_token, get_current_user

from apps.demand_assessment.main import router as DemandAssessmentRouter

app = FastAPI()

app.include_router(DemandAssessmentRouter, prefix="/demand_assessment", tags=["demand_assessment"])

@app.post("/token", response_model=Token)
def login_for_access_token(form_data: OAuth2PasswordRequestForm = Depends()):
    user = authenticate_user(fake_users_db, form_data.username, form_data.password)
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password",
            headers={"WWW-Authenticate": "Bearer"},
        )
    access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
    access_token = create_access_token(
        data={"sub": user["username"]}, expires_delta=access_token_expires
    )
    return {"access_token": access_token, "token_type": "bearer"}

@app.get("/users/me")
async def read_users_me(current_user: str = Depends(get_current_user)):
    return current_user