from enum import Enum
from typing import List, Optional

from pydantic import BaseModel


# Low stock product model
class LowStockProduct(BaseModel):
    id: str
    name: str
    sku: Optional[str] = None
    current_stock: int
    min_stock_level: Optional[int] = None
    supplier_name: Optional[str] = None
    category_name: Optional[str] = None

    class Config:
        from_attributes = True


# Product value model
class ProductValue(BaseModel):
    id: str
    name: str
    sku: Optional[str] = None
    current_stock: int
    price: float
    total_value: float

    class Config:
        from_attributes = True


# Inventory value summary
class InventoryValueSummary(BaseModel):
    total_products: int
    total_items: int
    total_value: float
    average_item_value: float
    by_category: List["CategoryValue"] = []


# Category value model
class CategoryValue(BaseModel):
    id: str
    name: str
    product_count: int
    total_items: int
    total_value: float

    class Config:
        from_attributes = True


# Time period enum for inventory movement reports
class TimePeriod(str, Enum):
    DAY = "day"
    WEEK = "week"
    MONTH = "month"
    YEAR = "year"
    ALL = "all"


# Inventory movement summary model
class MovementSummary(BaseModel):
    period: str
    stock_in: int
    stock_out: int
    adjustments: int
    returns: int
    net_change: int


# Update recursive references
InventoryValueSummary.model_rebuild()