package controller

import (
	"github.com/gin-gonic/gin"
	"hepa-calc-admin-api/api/dao"
	"hepa-calc-admin-api/api/dto"
	"hepa-calc-admin-api/api/requests"
	"hepa-calc-admin-api/api/responses"
	"hepa-calc-admin-api/global"
	"hepa-calc-admin-api/utils"
	"strconv"
)

type UserCoupon struct{}

// GetUserCouponPage 获取用户优惠卷列表-分页
func (b *UserCoupon) GetUserCouponPage(c *gin.Context) {
	userCouponRequest := requests.UserCouponRequest{}
	req := userCouponRequest.GetUserCouponPage
	if err := c.ShouldBind(&req); err != nil {
		responses.FailWithMessage(err.Error(), c)
		return
	}

	// 参数验证
	if err := global.Validate.Struct(req); err != nil {
		responses.FailWithMessage(utils.Translate(err), c)
		return
	}

	if req.Page == 0 {
		req.Page = 1
	}

	if req.PageSize == 0 {
		req.PageSize = 20
	}

	// 获取数据
	userCouponDao := dao.UserCouponDao{}
	userCoupons, total, err := userCouponDao.GetUserCouponPageSearch(req, req.Page, req.PageSize)
	if err != nil {
		responses.FailWithMessage(err.Error(), c)
		return
	}

	// 处理返回值
	g := dto.GetUserCouponListDto(userCoupons)

	result := make(map[string]interface{})
	result["page"] = req.Page
	result["page_size"] = req.PageSize
	result["total"] = total
	result["data"] = g
	responses.OkWithData(result, c)
}

// DeleteUserCoupon 删除用户优惠卷
func (b *UserCoupon) DeleteUserCoupon(c *gin.Context) {
	id := c.Param("user_coupon_id")
	if id == "" {
		responses.FailWithMessage("缺少参数", c)
		return
	}

	// 将 id 转换为 int64 类型
	userCouponId, err := strconv.ParseInt(id, 10, 64)
	if err != nil {
		responses.Fail(c)
		return
	}

	// 获取优惠卷数据
	userCouponDao := dao.UserCouponDao{}
	userCoupon, err := userCouponDao.GetUserCouponById(userCouponId)
	if err != nil {
		responses.FailWithMessage("优惠卷异常", c)
		return
	}

	// 检测优惠卷状态（0:未使用 1:已使用 3:已过期）
	if userCoupon.UserCouponStatus == 1 {
		responses.FailWithMessage("优惠卷已使用，无需删除", c)
		return
	}

	if userCoupon.UserCouponStatus == 3 {
		responses.FailWithMessage("优惠卷已过期，无需删除", c)
		return
	}

	// 开始事务
	tx := global.Db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()

	err = userCouponDao.DeleteUserCouponById(tx, userCouponId)
	if err != nil {
		tx.Rollback()
		responses.FailWithMessage("操作失败", c)
		return
	}

	tx.Commit()
	responses.Ok(c)
}