from fastapi import FastAPI, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from sqlalchemy.orm import Session

from app.utils import create_access_token
from . import schemas, crud
from .database import SessionLocal, engine, Base

Base.metadata.create_all(bind=engine)

app = FastAPI()


# Dependency
def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


@app.get("/check-health")
def health_check():
    return {"Health": "Super Healthy!"}


@app.post("/items/", response_model=schemas.Item)
def create_item(item: schemas.Item, db: Session = Depends(get_db)):
    return crud.create_item(db, item)


@app.get("/items/", response_model=list[schemas.Item])
def read_items(skip: int = 0, limit: int = 10, db: Session = Depends(get_db)):
    return crud.get_items(db, skip, limit)


@app.get("/items/{item_id}", response_model=schemas.Item)
def read_item(item_id: int, db: Session = Depends(get_db)):
    db_item = crud.get_item(db, item_id)
    if db_item is None:
        raise HTTPException(status_code=404, detail="Item not found")
    return db_item


@app.delete("/items/{item_id}", response_model=schemas.Item)
def delete_item(item_id: int, db: Session = Depends(get_db)):
    item = crud.delete_item(db, item_id)
    if item is None:
        raise HTTPException(status_code=404, detail="Item not found")
    return item


# Users


@app.post("/login", response_model=schemas.Token)
def user_login(
    form_data: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_db)
):
    user = crud.authenticate_user(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 = create_access_token(data={"sub": user.username})
    return {"access_token": access_token, "token_type": "bearer"}


@app.post("/register", response_model=schemas.UserOut)
def register_user(user: schemas.UserCreate, db: Session = Depends(get_db)):
    if crud.get_user_by_username(db, user.username):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Username already registered",
        )
    if crud.get_user_by_email(db, user.email):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Account with that email already registered",
        )
    return crud.create_user(db, user)