"""
Modelo ORM para datos específicos de Inventario y Manufactura (S-Partes) - Anexo 24
"""

from typing import TYPE_CHECKING, Optional
from decimal import Decimal
from api.v1.common.base_models import TenantScopedMixin, TimestampMixin
from core.database import Base
from sqlalchemy import (
    Integer,
    Numeric,
    PrimaryKeyConstraint,
    String,
    Boolean,
    ForeignKeyConstraint
)
from sqlalchemy.orm import Mapped, mapped_column, relationship

if TYPE_CHECKING:
    
    from api.v1.modules.a76.parts.models import Part


class InvPart(Base, TenantScopedMixin, TimestampMixin):
    """
    Tabla inv_partes: Extensión de Anexo 24 para Inventarios (SPartes).
    """

    __tablename__ = "inv_partes"
    __table_args__ = (
        PrimaryKeyConstraint("id", name="inv_partes_pkey"),
        ForeignKeyConstraint(
            ["id"], ["a76.parts.id"], name="fk_inv_partes_master"
        ),
        {"schema": "a24", "extend_existing": True},
    )

    # Relación 1:1 - El ID es el mismo de la tabla maestra
    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=False)

    # --- 1. ATRIBUTOS PRINCIPALES DE INVENTARIO ---
    part_type: Mapped[Optional[str]] = mapped_column(String(10)) # TIPOPARTE
    material_type: Mapped[Optional[str]] = mapped_column(String(10)) # TIPOMAT
    
    reference_number: Mapped[Optional[str]] = mapped_column(String(70)) # NUMPARTEREF
    flex_reference_number: Mapped[Optional[str]] = mapped_column(String(120)) # NUMPARTEREFFLEX

    # Conversiones
    equivalent_uom: Mapped[Optional[str]] = mapped_column(String(5)) # UNIMEDEQUIV
    conversion_factor: Mapped[Optional[Decimal]] = mapped_column(Numeric(19, 8)) # FACTORCONV
    
    stock_uom: Mapped[Optional[str]] = mapped_column(String(5)) # UMEXISTENCIA
    alternate_uom: Mapped[Optional[str]] = mapped_column(String(5)) # UNIMEDALTERNA
    conversion_uom: Mapped[Optional[str]] = mapped_column(String(9)) # UMCONVERSION

    # Valor Agregado
    added_value: Mapped[Optional[Decimal]] = mapped_column(Numeric(23, 8)) # VALORAGREGADO
    added_value_type: Mapped[Optional[str]] = mapped_column(String(2)) # TIPOVA

    assigned_client: Mapped[Optional[str]] = mapped_column(String(50)) # CLIENTEASIGNADO
    supplier_code: Mapped[Optional[str]] = mapped_column(String(8)) # PROVEEDOR
    is_textile: Mapped[Optional[str]] = mapped_column(String(2)) # ESTEXTIL

    # --- 2. MANUFACTURA Y PELIGROSIDAD ---
    bom_version: Mapped[Optional[int]] = mapped_column(Integer) # VERSIONBOM / VERSIONBILL
    is_repair: Mapped[Optional[str]] = mapped_column(String(3)) # ESREPARACION
    is_hazardous: Mapped[Optional[str]] = mapped_column(String(1)) # ESMATPELIGROSO
    
    emergency_number: Mapped[Optional[str]] = mapped_column(String(30)) # NUMEMERGENCIA
    danger_class: Mapped[Optional[str]] = mapped_column(String(4)) # CLASEDEPELIGRO
    packaging_group: Mapped[Optional[str]] = mapped_column(String(3)) # GRUPOEMBALAJE

    # Dimensiones
    width: Mapped[Optional[str]] = mapped_column(String(50)) # ANCHURA
    thickness: Mapped[Optional[str]] = mapped_column(String(50)) # ESPESOR
    specification: Mapped[Optional[str]] = mapped_column(String(50)) # SPEC

    # --- 3. COSTOS DETALLADOS Y ADUANA US ---
    total_value: Mapped[Optional[Decimal]] = mapped_column(Numeric(23, 8)) # VALORTOTAL
    direct_labor: Mapped[Optional[Decimal]] = mapped_column(Numeric(23, 8)) # TRABAJODIREC
    general_expenses: Mapped[Optional[Decimal]] = mapped_column(Numeric(23, 8)) # GASTOGRALES
    total_expenses: Mapped[Optional[Decimal]] = mapped_column(Numeric(23, 8)) # TOTALGASTOS
    
    depreciation: Mapped[Optional[Decimal]] = mapped_column(Numeric(23, 8)) # DEPRECIACION
    tooling: Mapped[Optional[Decimal]] = mapped_column(Numeric(23, 8)) # TOOLING
    material_consumed: Mapped[Optional[Decimal]] = mapped_column(Numeric(23, 8)) # MATCONSUMED
    profit: Mapped[Optional[Decimal]] = mapped_column(Numeric(23, 8)) # GANANCIA

    # Fracciones Internacionales
    us_fraction_alt: Mapped[Optional[str]] = mapped_column(String(13)) # FRACEUA
    ca_fraction: Mapped[Optional[str]] = mapped_column(String(13)) # FRACCANADA
    ad_valorem_us: Mapped[Optional[Decimal]] = mapped_column(Numeric(5, 2)) # ADVALOREMAME

    # Nafta / USMCA
    nafta_result: Mapped[Optional[str]] = mapped_column(String(19)) # RESULTADOCALCULONAFTA
    nafta_percentage: Mapped[Optional[Decimal]] = mapped_column(Numeric(5, 2)) # PORCENTAJECALCULONAFTA

    # Impuestos Específicos (Derechos de Trámite Admon)
    dta: Mapped[Optional[str]] = mapped_column(String(19)) # DTA
    dtb: Mapped[Optional[str]] = mapped_column(String(19)) # DTB
    dtg: Mapped[Optional[str]] = mapped_column(String(19)) # DTG

    # --- RELACIÓN ---
    # Usamos string "Part" para evitar problemas de carga
    master_info: Mapped["Part"] = relationship("Part", back_populates="inv_data")

    def __repr__(self) -> str:
        return f"<InvPart(id={self.id}, part_type='{self.part_type}')>"