"""库存管理 Pydantic 模式"""
from typing import Optional, List, Any
from datetime import date, datetime
from decimal import Decimal
from pydantic import BaseModel


# ── 物料分类 ──────────────────────────────────────────────────────────────────

class CategoryCreate(BaseModel):
    name: str
    code: str
    description: Optional[str] = None


class CategoryResponse(BaseModel):
    id: int
    name: str
    code: str
    description: Optional[str] = None
    created_at: Optional[datetime] = None

    class Config:
        from_attributes = True


# ── 物料 ──────────────────────────────────────────────────────────────────────

class MaterialCreate(BaseModel):
    category_id: int
    name: str
    model: Optional[str] = None
    specification: Optional[str] = None
    brand: Optional[str] = None
    unit: str = "个"
    safe_quantity: int = 0
    notes: Optional[str] = None


class MaterialUpdate(BaseModel):
    name: Optional[str] = None
    model: Optional[str] = None
    specification: Optional[str] = None
    brand: Optional[str] = None
    unit: Optional[str] = None
    safe_quantity: Optional[int] = None
    notes: Optional[str] = None


class MaterialResponse(BaseModel):
    id: int
    category_id: int
    category_name: Optional[str] = None
    name: str
    model: Optional[str] = None
    specification: Optional[str] = None
    brand: Optional[str] = None
    unit: str
    safe_quantity: int
    notes: Optional[str] = None
    total_quantity: int = 0
    available_quantity: int = 0
    created_at: Optional[datetime] = None

    class Config:
        from_attributes = True


class MaterialListResponse(BaseModel):
    total: int
    items: List[MaterialResponse]


# ── 库存批次 ──────────────────────────────────────────────────────────────────

class BatchCreate(BaseModel):
    material_id: int
    batch_no: str
    quantity: int
    supplier: Optional[str] = None
    purchase_date: Optional[date] = None
    purchase_price: Optional[Decimal] = None
    location: Optional[str] = None
    notes: Optional[str] = None


class BatchResponse(BaseModel):
    id: int
    material_id: int
    material_name: Optional[str] = None
    batch_no: str
    quantity: int
    available_quantity: int
    supplier: Optional[str] = None
    purchase_date: Optional[date] = None
    purchase_price: Optional[Decimal] = None
    location: Optional[str] = None
    status: str
    created_at: Optional[datetime] = None

    class Config:
        from_attributes = True


# ── 序列号设备 ────────────────────────────────────────────────────────────────

class SerialDeviceCreate(BaseModel):
    material_id: int
    batch_id: Optional[int] = None
    serial_no: str
    mac_address: Optional[str] = None
    asset_no: Optional[str] = None
    notes: Optional[str] = None


class SerialDeviceResponse(BaseModel):
    id: int
    material_id: int
    material_name: Optional[str] = None
    batch_id: Optional[int] = None
    serial_no: str
    mac_address: Optional[str] = None
    asset_no: Optional[str] = None
    status: str
    current_location: Optional[str] = None
    installed_info: Optional[Any] = None
    notes: Optional[str] = None
    created_at: Optional[datetime] = None
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True


class SerialDeviceListResponse(BaseModel):
    total: int
    items: List[SerialDeviceResponse]


# ── 出入库操作 ────────────────────────────────────────────────────────────────

class PurchaseInRequest(BaseModel):
    material_id: int
    batch_no: str
    quantity: int
    supplier: Optional[str] = None
    purchase_date: Optional[date] = None
    purchase_price: Optional[Decimal] = None
    location: Optional[str] = None
    serial_nos: Optional[List[str]] = None  # 高价值设备的序列号列表
    notes: Optional[str] = None


class AllocateOutRequest(BaseModel):
    serial_device_id: Optional[int] = None  # 序列号设备
    batch_id: Optional[int] = None          # 批次设备
    quantity: int = 1
    project_name: Optional[str] = None
    installation_info: Optional[Any] = None
    # 方案三：领用时补录设备标识（适用于批次出库场景）
    mac_address: Optional[str] = None       # MAC 地址
    serial_no: Optional[str] = None         # 序列号
    asset_no: Optional[str] = None          # 资产编号
    notes: Optional[str] = None


class ReturnInRequest(BaseModel):
    serial_device_id: int
    return_type: str  # simple, repair, scrap
    notes: Optional[str] = None


class TransactionResponse(BaseModel):
    id: int
    transaction_no: str
    transaction_type: str
    material_id: int
    material_name: Optional[str] = None
    quantity: int
    from_status: Optional[str] = None
    to_status: Optional[str] = None
    operator_id: Optional[int] = None
    project_name: Optional[str] = None
    installation_info: Optional[Any] = None  # 包含补录的设备信息
    notes: Optional[str] = None
    created_at: Optional[datetime] = None

    class Config:
        from_attributes = True


class TransactionListResponse(BaseModel):
    total: int
    items: List[TransactionResponse]


# ── 盘点 ──────────────────────────────────────────────────────────────────────

class CheckCreate(BaseModel):
    check_date: date
    material_id: int
    batch_id: Optional[int] = None
    actual_quantity: int
    reason: Optional[str] = None


class CheckResponse(BaseModel):
    id: int
    check_no: str
    check_date: date
    material_id: int
    material_name: Optional[str] = None
    batch_id: Optional[int] = None
    book_quantity: Optional[int] = None
    actual_quantity: Optional[int] = None
    difference: Optional[int] = None
    reason: Optional[str] = None
    adjusted: bool
    created_at: Optional[datetime] = None

    class Config:
        from_attributes = True


class CheckListResponse(BaseModel):
    total: int
    items: List[CheckResponse]


# ── 统计 ──────────────────────────────────────────────────────────────────────

class InventorySummary(BaseModel):
    total_materials: int
    total_quantity: int
    available_quantity: int
    allocated_quantity: int
    low_stock_count: int
    category_stats: List[dict]