from pydantic import BaseModel, EmailStr, Field
from typing import Optional
from datetime import datetime
from app.models.enums import EstadoCliente


class ClienteBase(BaseModel):
    nombre: str = Field(..., min_length=1, max_length=255)
    email: EmailStr
    rfc: Optional[str] = Field(None, max_length=13)
    telefono: Optional[str] = Field(None, max_length=20)
    permite_subclientes: bool = True


class ClienteCreate(ClienteBase):
    limite_timbres: int = Field(0, ge=0)


class ClienteUpdate(BaseModel):
    nombre: Optional[str] = Field(None, min_length=1, max_length=255)
    email: Optional[EmailStr] = None
    rfc: Optional[str] = Field(None, max_length=13)
    telefono: Optional[str] = Field(None, max_length=20)
    limite_timbres: Optional[int] = Field(None, ge=0)
    estado: Optional[EstadoCliente] = None
    permite_subclientes: Optional[bool] = None


class ClienteResponse(ClienteBase):
    id: int
    timbres_consumidos: int
    estado: EstadoCliente
    created_at: datetime
    updated_at: Optional[datetime]
    
    # Campos calculados dinámicamente
    limite_timbres: Optional[int] = None
    timbres_disponibles: Optional[int] = None

    class Config:
        from_attributes = True


class ClienteWithStats(ClienteResponse):
    total_subclientes: int = 0
    timbres_consumidos_subclientes: int = 0
    total_limites_asignados: int = 0


class BalanceResponse(BaseModel):
    cliente_id: int
    nombre_cliente: str
    limite_timbres: int
    timbres_disponibles: int
    timbres_consumidos: int
    porcentaje_uso: float
    total_subclientes: int = 0
    timbres_consumidos_subclientes: int = 0


class RecargaTimbreCreate(BaseModel):
    """Schema específico para recargar timbres"""
    cantidad: int = Field(..., gt=0)
    descripcion: Optional[str] = Field(None, max_length=500)