from __future__ import annotations

from decimal import Decimal, InvalidOperation
from typing import Any

from .mappings import customer_type_map, fabric_type_map, product_type_map
from .models import Customer, Fabric, Product


def pick_customer(fields: dict[str, Any]) -> Customer:
    """从字段字典中提取客户信息"""

    data = {k: fields.get(v, "") for k, v in customer_type_map.items()}
    return Customer(**data)


def pick_product(fields: dict[str, Any]) -> Product:
    """从字段字典中提取产品信息"""

    data = {k: fields.get(v, "") for k, v in product_type_map.items()}

    def _to_int(value):
        if value in ("", None):
            return None
        try:
            return int(value)
        except (TypeError, ValueError):
            return None

    def _to_decimal(value):
        if value in ("", None):
            return None
        try:
            return Decimal(str(value))
        except (InvalidOperation, TypeError, ValueError):
            return None

    data["pieces"] = _to_int(data.get("pieces"))
    data["segment_size"] = _to_decimal(data.get("segment_size"))

    return Product(**data)


def pick_fabric(fields: dict[str, Any]) -> Fabric:
    """从字段字典中提取面料信息"""

    data = {k: fields.get(v, "") for k, v in fabric_type_map.items()}
    return Fabric(**data)