"""
物料管理相关数据模型

定义物料价格历史和物料供应商关联的数据结构
"""
from pydantic import BaseModel, ConfigDict, Field
from datetime import datetime
from typing import Optional, List, Dict


class MaterialPriceHistoryCreate(BaseModel):
    """创建物料价格历史的请求模型"""
    price: float = Field(..., gt=0, description="物料价格")
    supplier_id: Optional[int] = Field(None, description="供应商ID")
    remark: Optional[str] = Field(None, description="备注")


class MaterialPriceHistoryResponse(BaseModel):
    """物料价格历史的响应模型"""
    id: int
    product_id: int
    product_sku: str
    product_name: str
    price: float
    effective_date: datetime
    supplier_id: Optional[int]
    supplier_name: Optional[str]
    remark: Optional[str]
    created_at: datetime

    model_config = ConfigDict(from_attributes=True)


class MaterialSupplierCreate(BaseModel):
    """创建物料供应商关联的请求模型"""
    supplier_id: int = Field(..., description="供应商ID")
    is_primary: bool = Field(False, description="是否为主要供应商")
    contact_person: Optional[str] = Field(None, description="联系人")
    contact_phone: Optional[str] = Field(None, description="联系电话")
    lead_time: Optional[int] = Field(None, ge=1, description="交货周期（天）")
    min_order_quantity: Optional[int] = Field(None, ge=1, description="最小订购量")


class MaterialSupplierResponse(BaseModel):
    """物料供应商关联的响应模型"""
    id: int
    product_id: int
    product_sku: str
    product_name: str
    supplier_id: int
    supplier_name: str
    is_primary: bool
    contact_person: Optional[str]
    contact_phone: Optional[str]
    lead_time: Optional[int]
    min_order_quantity: Optional[int]
    created_at: datetime
    updated_at: datetime

    model_config = ConfigDict(from_attributes=True)


class PriceHistoryItem(BaseModel):
    """价格历史项"""
    date: datetime
    price: float
    supplier_name: Optional[str]


class MaterialPriceTrendResponse(BaseModel):
    """物料价格趋势的响应模型"""
    product_id: int
    product_sku: str
    product_name: str
    current_price: float
    price_change: float
    price_change_percent: float
    price_history: List[PriceHistoryItem]