from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.security import create_access_token, hash_password, verify_password
from app.database import get_db
from app.models.user import User
from app.schemas.user import Token, UserCreate, UserOut

router = APIRouter()


@router.post("/register", response_model=UserOut, status_code=status.HTTP_201_CREATED)
async def register(body: UserCreate, db: AsyncSession = Depends(get_db)):
    existing = await db.execute(select(User).where(User.email == body.email))
    if existing.scalar_one_or_none():
        raise HTTPException(status_code=400, detail="Email already registered")

    user = User(
        email=body.email,
        hashed_password=hash_password(body.password),
        full_name=body.full_name,
    )
    db.add(user)
    await db.commit()
    await db.refresh(user)
    return user


@router.post("/login", response_model=Token)
async def login(form: OAuth2PasswordRequestForm = Depends(), db: AsyncSession = Depends(get_db)):
    result = await db.execute(select(User).where(User.email == form.username))
    user = result.scalar_one_or_none()
    if not user or not verify_password(form.password, user.hashed_password):
        raise HTTPException(status_code=401, detail="Incorrect email or password")

    return Token(access_token=create_access_token(user.id))