import hashlib
import httpx
from typing import List, Any
from core.config import settings
from schemas.order import OrderResponse, OrderItem

def _get_summary_string(json_data: Any) -> str:
    """Рекурсивная конкатенация значений для формирования MD5 подписи."""
    summary = ""
    if isinstance(json_data, dict):
        for key in sorted(json_data.keys()):
            summary += _get_summary_string(json_data[key])
    elif isinstance(json_data, list):
        for item in json_data:
            summary += _get_summary_string(item)
    else:
        if isinstance(json_data, bool):
            summary += "1" if json_data else ""
        elif json_data is not None:
            summary += str(json_data)
    return summary

async def fetch_cod_orders(status_name: str = "APPROVED") -> List[OrderResponse]:
    payload = {
        "apikey": settings.CRM_API_KEY,
        "object": "Orders",
        "method": "GetOrders",
        "params": {
            "sid": settings.CRM_STORE_SID,
            "key": settings.CRM_STORE_KEY,
            "Status": status_name,
            "ReturnWaybill": True,
            "ReturnGoods": True,
            "ReturnTotals": True
        }
    }

    # Формирование контрольной суммы MD5
    summary_string = _get_summary_string(payload)
    string_to_hash = summary_string + settings.CRM_API_SECRET
    payload["md5sum"] = hashlib.md5(string_to_hash.encode('utf-8')).hexdigest()

    headers = {'Content-Type': 'application/json; charset=utf-8'}

    async with httpx.AsyncClient() as client:
        response = await client.post(settings.CRM_API_URL, json=payload, headers=headers)
        response.raise_for_status()
        raw_data = response.json()

    parsed_orders = []
    
    # 1. Берем данные из ключа "result" (а не "orders")
    orders_list = raw_data.get("result", [])

    for order in orders_list:
        # 2. Собираем товары из массива Goods
        items = []
        for item in order.get("Goods", []):
            items.append(
                OrderItem(
                    name=item.get("Name", ""),
                    quantity=float(item.get("Quantity", 1.0)),
                    price=float(item.get("Price", 0.0))
                )
            )

        # 3. Извлекаем итоговую сумму из вложенного объекта Total.Amount
        total_info = order.get("Total", {})
        total_amount = float(total_info.get("Amount", 0.0))

        # 4. Формируем объект ответа для Pydantic
        parsed_orders.append(
            OrderResponse(
                id=str(order.get("ID")),
                client_name=order.get("RecipientDName", "Неизвестно"),
                client_phone=order.get("RecipientPhone", ""),
                ttn=order.get("Waybill_Number", ""),
                cod_amount=total_amount,
                fiscal_status="pending",
                items=items
            )
        )
        
    return parsed_orders