package service

import (
	"errors"
	"fmt"
	"time"

	"xk-of-api/internal/model"
)

// OrderService 负责套餐订购和订单状态查询。
type OrderService struct{}

// Order 暴露订单服务单例。
var Order = OrderService{}

// Create 创建套餐订单；金额根据套餐和周期计算。
func (s OrderService) Create(order model.Order) (model.Order, error) {
	if order.TenantName == "" || order.ContactName == "" || order.Phone == "" {
		return model.Order{}, errors.New("请补全诊所名称、联系人和手机号")
	}
	plan, ok := Pricing.FindByCode(order.PlanCode)
	if !ok {
		return model.Order{}, errors.New("套餐不存在")
	}
	if order.BillingCycle == "year" {
		order.Amount = plan.YearlyFee
	} else {
		order.BillingCycle = "month"
		order.Amount = plan.MonthlyFee
	}
	order.OrderNo = fmt.Sprintf("XK%d", time.Now().UnixNano())
	order.Status = "pending"
	return order, nil
}

// Detail 返回订单详情占位数据，后续改为读取 nl_order。
func (s OrderService) Detail(orderNo string) model.Order {
	return model.Order{OrderNo: orderNo, TenantName: "萧康示例诊所", ContactName: "王医生", Phone: "13800000000", PlanCode: "growth", BillingCycle: "year", Amount: 399000, Status: "pending"}
}

// List 返回后台订单列表占位数据。
func (s OrderService) List() []model.Order {
	return []model.Order{s.Detail("XK202607040001")}
}

// Notify 处理支付渠道回调占位逻辑，真实渠道验签在后续适配器完成。
func (s OrderService) Notify(channel string, payload map[string]interface{}) map[string]interface{} {
	return map[string]interface{}{"channel": channel, "notify_status": "received", "payload": payload}
}