from sqlalchemy import Column, String, Integer, DateTime, ForeignKey, Enum, Boolean
from sqlalchemy.dialects.mysql import DECIMAL
from sqlalchemy.sql import func
from pydantic import BaseModel, Field
from typing import Optional
from datetime import datetime
from .database import Base
import random
import time
import enum

class MerchantOrderStatus(str, enum.Enum):
    CREATED = "CREATED"           # 已创建（待支付）
    PENDING = "PENDING"           # 待接单
    DELIVERING = "DELIVERING"     # 待配送
    PICKUP_READY = "PICKUP_READY" # 待自提
    COMPLETED = "COMPLETED"       # 已完成
    CANCELLED = "CANCELLED"       # 已取消
    REFUNDING = "REFUNDING"       # 退款中
    REFUNDED = "REFUNDED"         # 已退款

class MerchantOrderDB(Base):
    __tablename__ = "merchant_orders"

    id = Column(Integer, primary_key=True, autoincrement=True)
    order_id = Column(String(15), unique=True, nullable=False)
    qrcode_url = Column(String(200))  # 核销码二维码图片地址
    user_id = Column(Integer, ForeignKey("users.userid"), nullable=False)
    merchant_id = Column(Integer, ForeignKey("merchants.id"), nullable=False)  # 商家ID
    merchant_product_id = Column(Integer, ForeignKey("merchant_products.id"), nullable=False)
    address_id = Column(Integer, ForeignKey("delivery_addresses.id"), nullable=False)  # 收货地址ID
    qty = Column(Integer, nullable=False, default=1)  # 购买数量
    unit_price = Column(DECIMAL(10,2), nullable=False)  # 产品单价
    order_amount = Column(DECIMAL(10,2), nullable=False)
    pay_amount = Column(DECIMAL(10,2), nullable=False, default=0)
    gift_points = Column(Integer, nullable=False, default=0)  # 赠送的积分
    status = Column(Enum(MerchantOrderStatus), nullable=False, default=MerchantOrderStatus.CREATED)
    pay_status = Column(Boolean, nullable=False, default=False)
    order_verify_code = Column(String(21), unique=True, nullable=False)
    verify_time = Column(DateTime(timezone=True), nullable=True)
    verify_user_id = Column(Integer, ForeignKey("users.userid"), nullable=True)
    create_time = Column(DateTime(timezone=True), server_default=func.now())
    update_time = Column(DateTime(timezone=True), onupdate=func.now())
    transaction_id = Column(String(64))  # 微信支付交易号
    pay_time = Column(DateTime(timezone=True), nullable=True)
    refund_transaction_id = Column(String(64))  # 微信退款交易号
    refund_time = Column(DateTime(timezone=True), nullable=True)


class MerchantOrderCreate(BaseModel):
    merchant_product_id: int
    qty: int = Field(..., gt=0)  # 购买数量，必须大于0
    address_id: int  # 收货地址ID

class MerchantOrderVerify(BaseModel):
    verify_code: str

class MerchantOrderInfo(BaseModel):
    id: int
    order_id: str
    user_id: int
    merchant_id: int  # 商家ID
    merchant_product_id: int
    address_id: int  # 收货地址ID
    qty: int  # 购买数量
    unit_price: float  # 产品单价
    order_amount: float
    pay_amount: float
    gift_points: int
    status: MerchantOrderStatus
    order_verify_code: str
    verify_time: Optional[datetime]
    verify_user_id: Optional[int]
    create_time: datetime
    update_time: Optional[datetime]
    product_name: Optional[str] = None
    product_image: Optional[str] = None
    product_price: Optional[float] = None
    merchant_name: Optional[str] = None
    merchant_address: Optional[str] = None
    
    class Config:
        from_attributes = True