"""
Schemas Pydantic communs.
"""

from datetime import date, datetime
from typing import Optional

from pydantic import BaseModel, ConfigDict


class BaseSchema(BaseModel):
    """Base schema avec configuration commune."""
    
    model_config = ConfigDict(
        from_attributes=True,
        populate_by_name=True,
    )


class PaginationParams(BaseModel):
    """Paramètres de pagination."""
    
    page: int = 1
    per_page: int = 20
    
    @property
    def offset(self) -> int:
        return (self.page - 1) * self.per_page


class PaginatedResponse(BaseModel):
    """Réponse paginée générique."""
    
    items: list
    total: int
    page: int
    per_page: int
    pages: int