"""Схемы заказов CRM.

Поля валидируются напрямую из "сырых" PascalCase-ключей ответа CRM через
`Field(alias=...)`, а наружу (в JSON фронту) отдаются как чистые snake_case
имена. Денежные значения остаются строками "как есть" от CRM — конвенция
integer-kopecks из CLAUDE.md относится к будущим персистентным моделям
`Order`/`Receipt`, а не к этому read-only проксирующему эндпоинту.
"""

from __future__ import annotations

from datetime import datetime
from typing import TYPE_CHECKING, Any

from pydantic import BaseModel, ConfigDict, Field, field_validator

if TYPE_CHECKING:
    from app.db.models.order import Order


class OrderGoodOut(BaseModel):
    model_config = ConfigDict(populate_by_name=True)

    id: str = Field(alias="ID")
    sku: str = Field(alias="SKU")
    name: str = Field(alias="Name")
    price: str = Field(alias="Price")
    quantity: str = Field(alias="Quantity")
    discount_amount: str | None = Field(default=None, alias="DiscountAmount")
    discount_percent: str | None = Field(default=None, alias="DiscountPercent")
    amount: str = Field(alias="Amount")


class OrderTotalOut(BaseModel):
    model_config = ConfigDict(populate_by_name=True)

    cost: str = Field(alias="Cost")
    quantity: str = Field(alias="Quantity")
    weight: str = Field(alias="Weight")
    discount_amount: str = Field(alias="DiscountAmount")
    discount_percent: str = Field(alias="DiscountPercent")
    amount: str = Field(alias="Amount")

    # CRM возвращает Quantity/Weight то числом, то строкой в зависимости от
    # заказа — приводим к строке единообразно для фронта.
    @field_validator("quantity", "weight", mode="before")
    @classmethod
    def _stringify(cls, value: Any) -> Any:
        return str(value) if value is not None else value


class OrderOut(BaseModel):
    model_config = ConfigDict(populate_by_name=True)

    id: str = Field(alias="ID")
    create_date_time: str = Field(alias="CreateDateTime")
    recipient_name: str | None = Field(default=None, alias="RecipientDName")
    recipient_phone: str | None = Field(default=None, alias="RecipientPhone")
    recipient_email: str | None = Field(default=None, alias="RecipientEmail")
    waybill_number: str | None = Field(default=None, alias="Waybill_Number")
    notes: str | None = Field(default=None, alias="Notes")
    total: OrderTotalOut = Field(alias="Total")
    goods: list[OrderGoodOut] = Field(default_factory=list, alias="Goods")


class OrderRowOut(BaseModel):
    """Ответ `GET /orders` — строится из локальной таблицы `orders`, не из CRM напрямую."""

    model_config = ConfigDict(from_attributes=True)

    id: str
    create_date_time: datetime
    recipient_name: str | None
    recipient_phone: str | None
    recipient_email: str | None
    waybill_number: str | None
    notes: str | None
    total_amount: str
    goods: list[OrderGoodOut]
    has_receipt: bool

    @classmethod
    def from_order(cls, order: Order) -> OrderRowOut:
        return cls(
            id=order.id,
            create_date_time=order.create_date_time,
            recipient_name=order.recipient_name,
            recipient_phone=order.recipient_phone,
            recipient_email=order.recipient_email,
            waybill_number=order.waybill_number,
            notes=order.notes,
            total_amount=f"{order.total_amount_kopecks / 100:.2f}",
            goods=[OrderGoodOut.model_validate(good) for good in order.goods],
            has_receipt=order.receipt_created_at is not None,
        )