from sqlalchemy import Column, Integer, String, DateTime, Boolean, JSON, Time
from sqlalchemy.sql import func
from pydantic import BaseModel, Field
from typing import Optional, List, Dict
from datetime import datetime, time
from .database import Base

class CouponActivityDB(Base):
    __tablename__ = "coupon_activities"

    id = Column(Integer, primary_key=True, autoincrement=True)
    name = Column(String(100), nullable=False)  # 活动名称
    description = Column(String(500), nullable=True)  # 活动描述
    start_time = Column(DateTime(timezone=True), nullable=False)  # 活动开始时间
    end_time = Column(DateTime(timezone=True), nullable=False)  # 活动结束时间
    daily_start_time = Column(Time, nullable=False)  # 每日开始时间
    daily_end_time = Column(Time, nullable=False)  # 每日结束时间
    total_limit = Column(Integer, nullable=False, default=0)  # 总可领取次数, 0表示不限制
    user_limit = Column(Integer, nullable=False, default=1)  # 用户可领取次数
    is_active = Column(Boolean, nullable=False, default=True)  # 是否激活
    coupon_config = Column(JSON, nullable=False)  # 可领取的优惠券配置 {coupon_id: count}
    create_time = Column(DateTime(timezone=True), server_default=func.now())
    update_time = Column(DateTime(timezone=True), onupdate=func.now())

# Pydantic 模型
class CouponActivityCreate(BaseModel):
    name: str = Field(..., max_length=100)
    description: Optional[str] = Field(None, max_length=500)
    start_time: datetime
    end_time: datetime
    daily_start_time: time  # 每日开始时间 "HH:MM:SS"
    daily_end_time: time  # 每日结束时间 "HH:MM:SS"
    total_limit: int = Field(default=0)
    user_limit: int = Field(..., gt=0)
    coupon_config: Dict[int, int]  # {coupon_id: count}
    is_active: bool = Field(default=True)

class CouponActivityUpdate(BaseModel):
    name: Optional[str] = Field(None, max_length=100)
    description: Optional[str] = Field(None, max_length=500)
    start_time: Optional[datetime] = None
    end_time: Optional[datetime] = None
    daily_start_time: Optional[time] = None
    daily_end_time: Optional[time] = None
    total_limit: Optional[int] = Field(default=0)
    user_limit: Optional[int] = Field(None, gt=0)
    coupon_config: Optional[Dict[int, int]] = None
    is_active: Optional[bool] = None

class CouponActivityInfo(BaseModel):
    id: int
    name: str
    description: Optional[str]
    start_time: datetime
    end_time: datetime
    daily_start_time: time
    daily_end_time: time
    total_limit: int
    user_limit: int
    coupon_config: Dict[int, int]
    is_active: bool
    create_time: datetime
    update_time: Optional[datetime]
    
    class Config:
        from_attributes = True