package handler

import (
	"net/http"

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

	"github.com/wangjia/jiu/backend/internal/middleware"
	"github.com/wangjia/jiu/backend/internal/model"
	"github.com/wangjia/jiu/backend/internal/util"
)

type ProductOptionHandler struct {
	db *gorm.DB
}

func NewProductOptionHandler(db *gorm.DB) *ProductOptionHandler {
	return &ProductOptionHandler{db: db}
}

// ── 商品名称 ──────────────────────────────────────────────────

func (h *ProductOptionHandler) ListNames(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	items := make([]model.ProductNameOption, 0)
	h.db.Where("shop_id = ?", shopID).Order("id ASC").Find(&items)
	util.RespondSuccess(c, items)
}

func (h *ProductOptionHandler) CreateName(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	var req struct {
		Code   string `json:"code"`
		Name   string `json:"name" binding:"required"`
		Remark string `json:"remark"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	item := model.ProductNameOption{
		TenantBase: model.TenantBase{ShopID: shopID},
		Code:       req.Code,
		Name:       req.Name,
		Remark:     req.Remark,
	}
	if err := h.db.Create(&item).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	util.RespondCreated(c, item)
}

func (h *ProductOptionHandler) UpdateName(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	var req struct {
		Code   string `json:"code"`
		Name   string `json:"name" binding:"required"`
		Remark string `json:"remark"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	var item model.ProductNameOption
	if err := h.db.Where("id = ? AND shop_id = ?", c.Param("id"), shopID).First(&item).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
		return
	}
	h.db.Model(&item).Where("shop_id = ?", shopID).Updates(map[string]interface{}{
		"code": req.Code, "name": req.Name, "remark": req.Remark,
	})
	util.RespondSuccess(c, item)
}

func (h *ProductOptionHandler) DeleteName(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	h.db.Where("id = ? AND shop_id = ?", c.Param("id"), shopID).Delete(&model.ProductNameOption{})
	c.JSON(http.StatusOK, gin.H{"message": "deleted"})
}

// ── 商品系列 ──────────────────────────────────────────────────

func (h *ProductOptionHandler) ListSeries(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	items := make([]model.ProductSeriesOption, 0)
	h.db.Where("shop_id = ?", shopID).Order("id ASC").Find(&items)
	util.RespondSuccess(c, items)
}

func (h *ProductOptionHandler) CreateSeries(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	var req struct {
		Code   string `json:"code"`
		Name   string `json:"name" binding:"required"`
		Remark string `json:"remark"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	item := model.ProductSeriesOption{
		TenantBase: model.TenantBase{ShopID: shopID},
		Code:       req.Code,
		Name:       req.Name,
		Remark:     req.Remark,
	}
	if err := h.db.Create(&item).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	util.RespondCreated(c, item)
}

func (h *ProductOptionHandler) UpdateSeries(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	var req struct {
		Code   string `json:"code"`
		Name   string `json:"name" binding:"required"`
		Remark string `json:"remark"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	var item model.ProductSeriesOption
	if err := h.db.Where("id = ? AND shop_id = ?", c.Param("id"), shopID).First(&item).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
		return
	}
	h.db.Model(&item).Where("shop_id = ?", shopID).Updates(map[string]interface{}{
		"code": req.Code, "name": req.Name, "remark": req.Remark,
	})
	util.RespondSuccess(c, item)
}

func (h *ProductOptionHandler) DeleteSeries(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	h.db.Where("id = ? AND shop_id = ?", c.Param("id"), shopID).Delete(&model.ProductSeriesOption{})
	c.JSON(http.StatusOK, gin.H{"message": "deleted"})
}

// ── 商品规格 ──────────────────────────────────────────────────

func (h *ProductOptionHandler) ListSpecs(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	items := make([]model.ProductSpecOption, 0)
	h.db.Where("shop_id = ?", shopID).Order("id ASC").Find(&items)
	util.RespondSuccess(c, items)
}

func (h *ProductOptionHandler) CreateSpec(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	var req struct {
		Code     string `json:"code"`
		Name     string `json:"name" binding:"required"`
		Quantity int    `json:"quantity"`
		Remark   string `json:"remark"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	item := model.ProductSpecOption{
		TenantBase: model.TenantBase{ShopID: shopID},
		Code:       req.Code,
		Name:       req.Name,
		Quantity:   req.Quantity,
		Remark:     req.Remark,
	}
	if err := h.db.Create(&item).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	util.RespondCreated(c, item)
}

func (h *ProductOptionHandler) UpdateSpec(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	var req struct {
		Code     string `json:"code"`
		Name     string `json:"name" binding:"required"`
		Quantity int    `json:"quantity"`
		Remark   string `json:"remark"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	var item model.ProductSpecOption
	if err := h.db.Where("id = ? AND shop_id = ?", c.Param("id"), shopID).First(&item).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
		return
	}
	h.db.Model(&item).Where("shop_id = ?", shopID).Updates(map[string]interface{}{
		"code": req.Code, "name": req.Name, "quantity": req.Quantity, "remark": req.Remark,
	})
	util.RespondSuccess(c, item)
}

func (h *ProductOptionHandler) DeleteSpec(c *gin.Context) {
	shopID := middleware.GetShopID(c)
	h.db.Where("id = ? AND shop_id = ?", c.Param("id"), shopID).Delete(&model.ProductSpecOption{})
	c.JSON(http.StatusOK, gin.H{"message": "deleted"})
}