"""Схемы API ЕТТН-чеков и касс Checkbox."""

from __future__ import annotations

import uuid
from datetime import datetime
from typing import Any

from pydantic import BaseModel, ConfigDict, Field

from app.core import crypto
from app.db.models.cash_register import CashRegister
from app.db.models.receipt import Receipt, ReceiptStatus


def _money(kopecks: int) -> str:
    return f"{kopecks / 100:.2f}"


class ReceiptOut(BaseModel):
    id: uuid.UUID
    order_id: str
    waybill_number: str
    status: ReceiptStatus
    total_amount: str
    prepayment_amount: str
    cod_amount: str
    checkbox_ettn_id: str | None
    checkbox_status: str | None
    checkbox_receipt_id: str | None
    error: str | None
    created_at: datetime
    last_checked_at: datetime | None

    @classmethod
    def from_receipt(cls, receipt: Receipt) -> ReceiptOut:
        return cls(
            id=receipt.id,
            order_id=receipt.order_id,
            waybill_number=receipt.waybill_number,
            status=receipt.status,
            total_amount=_money(receipt.total_kopecks),
            prepayment_amount=_money(receipt.prepayment_kopecks),
            cod_amount=_money(receipt.cod_kopecks),
            checkbox_ettn_id=receipt.checkbox_ettn_id,
            checkbox_status=receipt.checkbox_status,
            checkbox_receipt_id=receipt.checkbox_receipt_id,
            error=receipt.error,
            created_at=receipt.created_at,
            last_checked_at=receipt.last_checked_at,
        )


class ReceiptRequestItem(BaseModel):
    order_id: str = Field(min_length=1, max_length=32)
    # None — предоплата = сумма заказа − наложка НП.
    prepayment_kopecks: int | None = Field(default=None, ge=0)


class ReceiptCreateRequest(BaseModel):
    items: list[ReceiptRequestItem] = Field(min_length=1, max_length=200)


class ReceiptCreateResponse(BaseModel):
    created: list[ReceiptOut]
    # order_id → причина, по которой чек не создан.
    errors: dict[str, str]


# --- Кассы -------------------------------------------------------------------


def _masked(encrypted: str) -> str:
    try:
        return crypto.mask(crypto.decrypt(encrypted))
    except crypto.DecryptionError:
        return "не расшифровывается — введите заново"


class CashRegisterOut(BaseModel):
    id: uuid.UUID
    name: str
    fiscal_number: str | None
    license_key_masked: str
    # None — ключ НП не задан: касса не опрашивает посылки и не получает заказы.
    np_api_key_masked: str | None
    tax_codes: list[Any]
    is_active: bool
    is_default: bool

    @classmethod
    def from_register(cls, register: CashRegister) -> CashRegisterOut:
        return cls(
            id=register.id,
            name=register.name,
            fiscal_number=register.fiscal_number,
            license_key_masked=_masked(register.license_key_enc),
            np_api_key_masked=(
                _masked(register.np_api_key_enc) if register.np_api_key_enc else None
            ),
            tax_codes=register.tax_codes,
            is_active=register.is_active,
            is_default=register.is_default,
        )


class CashRegisterCreate(BaseModel):
    name: str = Field(min_length=1, max_length=255)
    fiscal_number: str | None = Field(default=None, max_length=64)
    license_key: str = Field(min_length=1, max_length=255)
    pin_code: str = Field(min_length=1, max_length=32)
    np_api_key: str | None = Field(default=None, min_length=1, max_length=255)
    tax_codes: list[int | str] = Field(default_factory=list, max_length=2)
    is_default: bool = True


class CashRegisterUpdate(BaseModel):
    model_config = ConfigDict(extra="forbid")

    name: str | None = Field(default=None, min_length=1, max_length=255)
    fiscal_number: str | None = Field(default=None, max_length=64)
    license_key: str | None = Field(default=None, min_length=1, max_length=255)
    pin_code: str | None = Field(default=None, min_length=1, max_length=32)
    np_api_key: str | None = Field(default=None, min_length=1, max_length=255)
    tax_codes: list[int | str] | None = Field(default=None, max_length=2)
    is_active: bool | None = None
    is_default: bool | None = None