from sqlalchemy import Column, String, Integer, Float, DateTime, ForeignKey, Enum, Boolean, Date, Text, Time
from sqlalchemy.dialects.mysql import DECIMAL
from sqlalchemy.sql import func
from pydantic import BaseModel, Field
from typing import Optional, List
from datetime import datetime, date, time
from .database import Base
from sqlalchemy.orm import relationship
import enum

from app.core.utils import CommonUtils
from app.core.imageprocessor import process_image, ImageFormat

class ProductStatus(str, enum.Enum):
    LISTING = "LISTING"       # 上架
    UNLISTING = "UNLISTING"   # 下架

class DeliveryType(str, enum.Enum):
    """配送类型枚举"""
    DELIVERY = "DELIVERY"     # 配送到家
    PICKUP = "PICKUP"         # 自提

class DeliveryTimeType(str, enum.Enum):
    """配送时间类型枚举"""
    IMMEDIATE = "IMMEDIATE"   # 立即送
    SCHEDULED = "SCHEDULED"   # 定时送

class OperationType(str, enum.Enum):
    """经营类型枚举"""
    SELF_OPERATED = "SELF_OPERATED"  # 自营
    MERCHANT = "MERCHANT"            # 商家

class MerchantProductDB(Base):
    __tablename__ = "merchant_products"

    id = Column(Integer, primary_key=True, autoincrement=True)
    merchant_id = Column(Integer, ForeignKey("merchants.id"), nullable=False)
    name = Column(String(100), nullable=False)
    image_url = Column(String(500), nullable=False)
    product_price = Column(Float, nullable=False)  # 原价
    sale_price = Column(DECIMAL(10,2), nullable=False)     # 售价
    settlement_amount = Column(DECIMAL(10,2), nullable=False)  # 商家结算金额
    tags = Column(String(200))                     # 标签，逗号分隔
    purchase_limit = Column(Integer, nullable=False, default=0)  # 限购次数，0表示不限购
    gift_points_rate = Column(DECIMAL(4,2), nullable=False, default=0.00)  # 购买赠送积分比例，默认0%
    promotion_text = Column(String(100))  # 促销文本
    product_detail = Column(Text, nullable=True)  # 产品详细描述，Markdown格式
    purchase_note = Column(Text, nullable=True)  # 购买须知，用于提供商品购买相关注意事项
    operation_type = Column(Enum(OperationType), nullable=False, default=OperationType.MERCHANT)  # 经营类型：自营或商家
    longitude = Column(DECIMAL(9,6), nullable=True)  # 经度，精确到小数点后6位
    latitude = Column(DECIMAL(9,6), nullable=True)   # 纬度，精确到小数点后6位
    qty = Column(Integer, nullable=False, default=0)  # 库存
    sold_total = Column(Integer, nullable=False, default=0)  # 已售数量
    is_sellout = Column(Boolean, nullable=False, default=False)  # 是否售罄
    delivery_type = Column(Enum(DeliveryType), nullable=False, default=DeliveryType.DELIVERY)  # 配送类型
    pickup_place = Column(String(200), nullable=True)  # 自提点
    pickup_time_from = Column(Time, nullable=True)  # 自提开始时间
    pickup_time_to = Column(Time, nullable=True)  # 自提结束时间
    delivery_time_type = Column(Enum(DeliveryTimeType), nullable=False, default=DeliveryTimeType.IMMEDIATE)  # 配送时间类型
    delivery_date = Column(Date, nullable=True)  # 配送日期，仅对定时送有效
    recommend = Column(Boolean, nullable=False, default=False)  # 是否为平台推荐商品
    create_time = Column(DateTime(timezone=True), server_default=func.now())
    update_time = Column(DateTime(timezone=True), onupdate=func.now())
    status = Column(Enum(ProductStatus), nullable=False, default=ProductStatus.UNLISTING)

    merchant = relationship("MerchantDB", backref="products")

    @property
    def optimized_image_url(self):
        return process_image(self.image_url).thumbnail(width=800, height=800).format(ImageFormat.WEBP).build()

# Pydantic 模型
class MerchantProductCreate(BaseModel):
    merchant_id: int
    name: str = Field(..., max_length=100)
    image_url: str = Field(..., max_length=500)
    product_price: float = Field(..., gt=0)
    sale_price: float = Field(..., gt=0)
    settlement_amount: float = Field(..., gt=0)
    tags: str = Field("", max_length=200)
    purchase_limit: int = Field(0, ge=0)  # 限购次数，默认0表示不限购
    product_detail: Optional[str] = None  # 产品详细描述，Markdown格式
    purchase_note: Optional[str] = None  # 购买须知，用于提供商品购买相关注意事项
    operation_type: OperationType = Field(OperationType.MERCHANT)  # 经营类型：自营或商家
    longitude: Optional[float] = Field(None, ge=-180, le=180)  # 经度
    latitude: Optional[float] = Field(None, ge=-90, le=90)     # 纬度
    qty: int = Field(0, ge=0)  # 库存
    sold_total: int = Field(0, ge=0)  # 已售数量
    is_sellout: bool = Field(False)  # 是否售罄
    delivery_type: DeliveryType = Field(DeliveryType.DELIVERY)  # 配送类型
    pickup_place: Optional[str] = Field(None, max_length=200)  # 自提点
    pickup_time_from: Optional[time] = Field(None)  # 自提开始时间
    pickup_time_to: Optional[time] = Field(None)  # 自提结束时间
    delivery_time_type: DeliveryTimeType = Field(DeliveryTimeType.IMMEDIATE)  # 配送时间类型
    delivery_date: Optional[date] = Field(None)  # 配送日期
    status: ProductStatus = ProductStatus.UNLISTING
    promotion_text: Optional[str] = Field(None, max_length=100)  # 促销文本
    gift_points_rate: Optional[float] = Field(10.00, ge=0, le=100)  # 购买赠送积分比例
    recommend: bool = Field(False)  # 是否为平台推荐商品

class MerchantProductUpdate(BaseModel):
    name: Optional[str] = Field(None, max_length=100)
    image_url: Optional[str] = Field(None, max_length=500)
    product_price: Optional[float] = Field(None, gt=0)
    sale_price: Optional[float] = Field(None, gt=0)
    settlement_amount: Optional[float] = Field(None, gt=0)
    tags: Optional[str] = Field(None, max_length=200)
    purchase_limit: Optional[int] = Field(None, ge=0)  # 限购次数，可选字段
    product_detail: Optional[str] = None  # 产品详细描述，Markdown格式
    purchase_note: Optional[str] = None  # 购买须知，用于提供商品购买相关注意事项
    operation_type: Optional[OperationType] = None  # 经营类型：自营或商家
    longitude: Optional[float] = Field(None, ge=-180, le=180)  # 经度
    latitude: Optional[float] = Field(None, ge=-90, le=90)     # 纬度
    qty: Optional[int] = Field(None, ge=0)  # 库存
    sold_total: Optional[int] = Field(None, ge=0)  # 已售数量
    is_sellout: Optional[bool] = None  # 是否售罄
    delivery_type: Optional[DeliveryType] = None  # 配送类型
    pickup_place: Optional[str] = Field(None, max_length=200)  # 自提点
    pickup_time_from: Optional[time] = None  # 自提开始时间
    pickup_time_to: Optional[time] = None  # 自提结束时间
    delivery_time_type: Optional[DeliveryTimeType] = None  # 配送时间类型
    delivery_date: Optional[date] = None  # 配送日期
    status: Optional[ProductStatus] = None
    promotion_text: Optional[str] = Field(None, max_length=100)  # 促销文本
    gift_points_rate: Optional[float] = Field(None, ge=0, le=100)  # 购买赠送积分比例
    recommend: Optional[bool] = None  # 是否为平台推荐商品

class MerchantProductInfo(BaseModel):
    id: int
    merchant_id: int
    merchant_name: Optional[str] = None  # 添加商家名称字段
    name: str
    image_url: str
    optimized_image_url: Optional[str] = None
    product_price: float
    sale_price: float
    settlement_amount: float
    tags: str
    purchase_limit: int  # 限购次数
    product_detail: Optional[str] = None  # 产品详细描述，Markdown格式
    purchase_note: Optional[str] = None  # 购买须知，用于提供商品购买相关注意事项
    operation_type: OperationType  # 经营类型：自营或商家
    longitude: Optional[float] = None  # 经度
    latitude: Optional[float] = None   # 纬度
    qty: int  # 库存
    sold_total: int = 0  # 已售数量
    is_sellout: bool  # 是否售罄
    delivery_type: DeliveryType  # 配送类型
    pickup_place: Optional[str] = None  # 自提点
    pickup_time_from: Optional[time] = None  # 自提开始时间
    pickup_time_to: Optional[time] = None  # 自提结束时间
    delivery_time_type: DeliveryTimeType  # 配送时间类型
    delivery_date: Optional[date] = None  # 配送日期
    gift_points_rate: float
    promotion_text: Optional[str] = None  # 促销文本
    recommend: bool = False  # 是否为平台推荐商品
    create_time: datetime
    update_time: Optional[datetime]
    status: ProductStatus
    
    class Config:
        from_attributes = True