from pydantic import BaseModel, EmailStr, Field, validator
from datetime import datetime
from typing import Optional
#
import re
from enum import Enum

from sqlalchemy.orm import Session
from datetime import datetime
from typing import Optional
from fastapi import HTTPException
from app.modules.suppliers.models import Suppliers
from app.modules.suppliers.schema import SupplierCreate, SupplierUpdate


class SuppliersService:
    @staticmethod
    def create_suppliers(db: Session, data:SupplierCreate ):
        new_suppliers = Suppliers(**data.dict())
        db.add(new_suppliers)
        db.commit()
        db.refresh(new_suppliers)
        return new_suppliers

    @staticmethod
    def get_suppliers(db: Session, suppliers_id: int, current_user):
        suppliers = db.query(Suppliers).filter(Suppliers.id == suppliers_id).first()
        if not suppliers:
            raise ValueError("suppliers no encontrado")
        return suppliers

    @staticmethod
    def update_suppliers(db: Session, suppliers_id: int, data:SupplierUpdate , current_user):
        suppliers = db.query(Suppliers).filter(Suppliers.id == suppliers_id).first()
        if not suppliers:
            raise ValueError("suppliers no encontrado")
        
        if current_user.role not in ["ROOT", "ADMIN"]:
            raise ValueError("No tienes permisos para actualizar este suppliers")
        
        update_data = data.dict(exclude_unset=True)
        for key, value in update_data.items():
            setattr(suppliers, key, value)
        
        db.commit()
        db.refresh(suppliers)
        return suppliers

    @staticmethod
    def delete_suppliers(db: Session, suppliers_id: int, current_user):
        suppliers = db.query(Suppliers).filter(Suppliers.id == suppliers_id).first()
        if not suppliers:
            raise ValueError("suppliers no encontrado")
        
        if current_user.role not in ["ROOT", "ADMIN"]:
            raise ValueError("No tienes permisos para eliminar este suppliers")
        
        try:
            suppliers.is_active = False
            suppliers.deleted_at = datetime.utcnow()
            suppliers.deleted_by = current_user.id
            db.commit()
            db.refresh(suppliers)
        except Exception as e:
            db.rollback()
            raise ValueError(f"Error al eliminar el suppliers: {e}")
        
        return {"message": "suppliers eliminado correctamente"}