package model

import (
	"time"
)

// 订单状态常量
const (
	OrderStatusPending   = 1 // 未付款
	OrderStatusPaid      = 2 // 已付款
	OrderStatusPreparing = 3 // 待发货
	OrderStatusShipped   = 4 // 已发货
	OrderStatusReceiving = 5 // 待收货
	OrderStatusCompleted = 6 // 已完成
	OrderStatusCancelled = 7 // 已取消
	OrderStatusReturning = 8 // 退货中
	OrderStatusRefunded  = 9 // 已退款
)

// Cart 购物车
type Cart struct {
	ID        uint      `json:"id" gorm:"primaryKey;autoIncrement"`
	UserID    uint      `json:"user_id" gorm:"not null"`
	ProductID uint      `json:"product_id" gorm:"not null"`
	SKUID     *uint     `json:"sku_id" gorm:"column:sk_uid"`
	Quantity  int       `json:"quantity" gorm:"not null"`
	Selected  bool      `json:"selected" gorm:"default:true"`
	CreatedAt time.Time `json:"created_at"`
	UpdatedAt time.Time `json:"updated_at"`
	
	// 关联数据
	User    User       `json:"user,omitempty" gorm:"foreignKey:UserID"`
	Product Product    `json:"product,omitempty" gorm:"foreignKey:ProductID"`
	SKU     ProductSKU `json:"sku,omitempty" gorm:"foreignKey:SKUID"`
}

// Order 订单
type Order struct {
	ID              uint       `json:"id" gorm:"primaryKey;autoIncrement"`
	OrderNo         string     `json:"order_no" gorm:"size:32;not null;uniqueIndex"`
	UserID          uint       `json:"user_id" gorm:"not null"`
	StoreID         uint       `json:"store_id" gorm:"default:1"`
	TotalAmount     float64    `json:"total_amount" gorm:"type:decimal(10,2);not null"`
	PayAmount       float64    `json:"pay_amount" gorm:"type:decimal(10,2);not null"`
	DiscountAmount  float64    `json:"discount_amount" gorm:"type:decimal(10,2);default:0.00"`
	ShippingFee     float64    `json:"shipping_fee" gorm:"type:decimal(10,2);default:0.00"`
	CouponID        *uint      `json:"coupon_id"`
	CouponAmount    float64    `json:"coupon_amount" gorm:"type:decimal(10,2);default:0.00"`
	PointsAmount    float64    `json:"points_amount" gorm:"type:decimal(10,2);default:0.00"`
	Status          int        `json:"status" gorm:"default:1"` // 统一状态：1未付款,2已付款,3待发货,4已发货,5待收货,6已完成,7已取消,8退货中,9已退款
	PayStatus       int        `json:"pay_status" gorm:"default:0"` // 兼容字段，建议使用Status统一管理
	PayMethod       string     `json:"pay_method" gorm:"size:20"`
	WechatOutTradeNo string    `json:"wechat_out_trade_no" gorm:"size:64;index"` // 微信支付商户订单号，每次支付请求唯一
	WechatTransactionID string `json:"wechat_transaction_id" gorm:"size:64;index"` // 微信支付交易号，支付成功后由微信返回
	PayTime         *time.Time `json:"pay_time"`
	ShippedAt       *time.Time `json:"shipped_at" gorm:"column:shipped_at"`
	ReceiveTime     *time.Time `json:"receive_time"`
	CancelTime      *time.Time `json:"cancel_time"`
	CancelReason    string     `json:"cancel_reason" gorm:"size:255"`
	RefundAmount    float64    `json:"refund_amount" gorm:"type:decimal(10,2);default:0.00"`
	RefundReason    string     `json:"refund_reason" gorm:"size:255"`
	RefundTime      *time.Time `json:"refund_time"`
	RefundedAt      *time.Time `json:"refunded_at"`
	ReceiverName    string     `json:"receiver_name" gorm:"size:50;not null"`
	ReceiverPhone   string     `json:"receiver_phone" gorm:"size:20;not null"`
	ReceiverAddress string     `json:"receiver_address" gorm:"size:255;not null"`
	LogisticsCompany string    `json:"logistics_company" gorm:"column:logistics_company;size:50"`
	LogisticsNo      string    `json:"logistics_no" gorm:"column:logistics_no;size:100"`
	Remark          string     `json:"remark" gorm:"size:255"`
	CreatedAt       time.Time  `json:"created_at"`
	UpdatedAt       time.Time  `json:"updated_at"`
	
	// 关联数据
	User       User        `json:"user,omitempty" gorm:"foreignKey:UserID"`
	Store      Store       `json:"store,omitempty" gorm:"foreignKey:StoreID"`
	Coupon     Coupon      `json:"coupon,omitempty" gorm:"foreignKey:CouponID"`
	OrderItems []OrderItem `json:"order_items,omitempty" gorm:"foreignKey:OrderID"`
}

// OrderItem 订单项
type OrderItem struct {
	ID           uint `json:"id" gorm:"primaryKey;autoIncrement"`
	OrderID      uint `json:"order_id" gorm:"not null"`
	ProductID    uint      `json:"product_id" gorm:"not null"`
	SpecID       *uint     `json:"spec_id" gorm:"column:spec_id"`
	SKUID        *uint     `json:"sku_id" gorm:"column:sk_uid"`
	Quantity     int       `json:"quantity" gorm:"not null"`
	Price        float64   `json:"price" gorm:"type:decimal(10,2);not null"`
	TotalPrice   float64   `json:"total_price" gorm:"type:decimal(10,2);not null"`
	ProductName  string    `json:"product_name" gorm:"size:100;not null"`
	ProductImage string    `json:"product_image" gorm:"size:255"`
	SpecName     string    `json:"spec_name" gorm:"column:spec_name"`
	SpecValue    string    `json:"spec_value" gorm:"column:spec_value"`
	SpecInfo     JSONMap   `json:"spec_info" gorm:"type:json"`
	IsCommented  bool      `json:"is_commented" gorm:"default:false"`
	CreatedAt    time.Time `json:"created_at"`
	UpdatedAt    time.Time `json:"updated_at"`
	
	// 关联
	Order   Order      `json:"order,omitempty" gorm:"foreignKey:OrderID"`
	Product Product    `json:"product,omitempty" gorm:"foreignKey:ProductID"`
	SKU     ProductSKU `json:"sku,omitempty" gorm:"foreignKey:SKUID"`
}



// TableName 指定表名
func (Cart) TableName() string {
	return "ai_carts"
}

// TableName 指定表名
func (Order) TableName() string {
	return "ai_orders"
}

// TableName 指定表名
func (OrderItem) TableName() string {
	return "order_items"
}

// GetStatusText 获取订单状态文本
func (o *Order) GetStatusText() string {
	switch o.Status {
	case OrderStatusPending:
		return "未付款"
	case OrderStatusPaid:
		return "已付款"
	case OrderStatusPreparing:
		return "待发货"
	case OrderStatusShipped:
		return "已发货"
	case OrderStatusReceiving:
		return "待收货"
	case OrderStatusCompleted:
		return "已完成"
	case OrderStatusCancelled:
		return "已取消"
	case OrderStatusReturning:
		return "退货中"
	case OrderStatusRefunded:
		return "已退款"
	default:
		return "未知状态"
	}
}