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

from app.core.security import hash_password
from app.database import get_db
from app.deps import get_current_admin
from app.models.user import User
from app.schemas.user import UserAdminCreate, UserAdminOut

router = APIRouter()


@router.get("/users", response_model=list[UserAdminOut])
async def list_users(
    _admin: User = Depends(get_current_admin),
    db: AsyncSession = Depends(get_db),
) -> list[User]:
    result = await db.execute(select(User).order_by(User.email))
    return list(result.scalars().all())


@router.post("/users", response_model=UserAdminOut, status_code=status.HTTP_201_CREATED)
async def create_user(
    body: UserAdminCreate,
    _admin: User = Depends(get_current_admin),
    db: AsyncSession = Depends(get_db),
) -> User:
    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,
        is_superuser=body.is_admin,
    )
    db.add(user)
    await db.commit()
    await db.refresh(user)
    return user


@router.delete("/users/{user_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_user(
    user_id: str,
    admin: User = Depends(get_current_admin),
    db: AsyncSession = Depends(get_db),
) -> None:
    if user_id == admin.id:
        raise HTTPException(status_code=400, detail="Cannot delete your own account")

    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    if not user:
        raise HTTPException(status_code=404, detail="User not found")

    await db.delete(user)
    await db.commit()


@router.patch("/users/{user_id}/active", response_model=UserAdminOut)
async def toggle_active(
    user_id: str,
    admin: User = Depends(get_current_admin),
    db: AsyncSession = Depends(get_db),
) -> User:
    if user_id == admin.id:
        raise HTTPException(status_code=400, detail="Cannot change your own active status")

    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    if not user:
        raise HTTPException(status_code=404, detail="User not found")

    user.is_active = not user.is_active
    await db.commit()
    await db.refresh(user)
    return user