package handlers

import (
	"github.com/gin-gonic/gin"
	"gorm.io/gorm"

	"soda-api/backend/internal/models"
	"soda-api/backend/internal/utils"
)

type ProductHandler struct {
	db *gorm.DB
}

func NewProductHandler(db *gorm.DB) *ProductHandler {
	return &ProductHandler{db: db}
}

func (h *ProductHandler) List(c *gin.Context) {
	category := c.Query("category")
	var products []models.Product
	query := h.db
	if category != "" {
		query = query.Where("category = ?", category)
	}
	if err := query.Order("id desc").Find(&products).Error; err != nil {
		utils.JSONError(c, 500, "获取商品失败")
		return
	}
	utils.JSONSuccess(c, products)
}

func (h *ProductHandler) Get(c *gin.Context) {
	var product models.Product
	if err := h.db.First(&product, c.Param("id")).Error; err != nil {
		utils.JSONError(c, 404, "商品不存在")
		return
	}
	utils.JSONSuccess(c, product)
}

func (h *ProductHandler) Create(c *gin.Context) {
	var product models.Product
	if err := c.ShouldBindJSON(&product); err != nil {
		utils.JSONError(c, 400, "请填写完整的商品信息")
		return
	}
	if err := h.db.Create(&product).Error; err != nil {
		utils.JSONError(c, 500, "创建商品失败")
		return
	}
	utils.JSONSuccess(c, product)
}

func (h *ProductHandler) Update(c *gin.Context) {
	var product models.Product
	if err := h.db.First(&product, c.Param("id")).Error; err != nil {
		utils.JSONError(c, 404, "商品不存在")
		return
	}
	if err := c.ShouldBindJSON(&product); err != nil {
		utils.JSONError(c, 400, "请填写正确的商品信息")
		return
	}
	if err := h.db.Save(&product).Error; err != nil {
		utils.JSONError(c, 500, "更新失败")
		return
	}
	utils.JSONSuccess(c, product)
}

func (h *ProductHandler) Delete(c *gin.Context) {
	if err := h.db.Delete(&models.Product{}, c.Param("id")).Error; err != nil {
		utils.JSONError(c, 500, "删除失败")
		return
	}
	utils.JSONSuccess(c, gin.H{"message": "删除成功"})
}