import uuid

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.models.user import User
from app.schemas.user import UserRegister, UserUpdate
from app.services.auth_service import hash_password


async def get_by_id(db: AsyncSession, user_id: str | uuid.UUID) -> User | None:
    uid = user_id if isinstance(user_id, uuid.UUID) else uuid.UUID(str(user_id))
    result = await db.execute(select(User).where(User.id == uid))
    return result.scalar_one_or_none()


async def get_by_email(db: AsyncSession, email: str) -> User | None:
    result = await db.execute(select(User).where(User.email == email.lower()))
    return result.scalar_one_or_none()


async def create(db: AsyncSession, data: UserRegister) -> User:
    user = User(
        email=data.email.lower(),
        hashed_password=hash_password(data.password),
        full_name=data.full_name,
        phone=data.phone,
        role=data.requested_role,
        organization_name=data.organization_name,
        instagram_handle=data.instagram_handle,
        # Members are auto-approved; organizers require admin review
        status="approved" if data.requested_role == "member" else "pending",
    )
    db.add(user)
    await db.commit()
    await db.refresh(user)
    return user


async def update(db: AsyncSession, user: User, data: UserUpdate) -> User:
    for field, value in data.model_dump(exclude_none=True).items():
        setattr(user, field, value)
    await db.commit()
    await db.refresh(user)
    return user


async def set_status(db: AsyncSession, user: User, status: str) -> User:
    user.status = status
    await db.commit()
    await db.refresh(user)
    return user


async def list_all(db: AsyncSession, skip: int = 0, limit: int = 100) -> list[User]:
    result = await db.execute(select(User).offset(skip).limit(limit))
    return list(result.scalars().all())