package product

import (
	"backend/internal/dto"
	planservice "backend/internal/service/plan"
	productservice "backend/internal/service/product"
	"backend/utils"
	"fmt"
	"net/http"
	"strconv"

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

// ProductController 产品控制器 // Logan.Li
type ProductController struct {
	svc     *productservice.ProductService
	planSvc *planservice.PlanService
	db      *gorm.DB
}

// NewProductController 创建控制器实例 // Logan.Li
func NewProductController(db *gorm.DB) *ProductController {
	return &ProductController{
		svc:     productservice.NewProductService(db),
		planSvc: planservice.NewPlanService(db),
		db:      db,
	}
}

// List 产品列表 // Logan.Li
func (ctrl *ProductController) List(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
	keyword := c.Query("keyword")

	products, total, err := ctrl.svc.List(page, pageSize, keyword)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{
		"list": products, "total": total, "page": page, "page_size": pageSize,
		"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
	}})
}

// GetAll 全部产品（下拉用） // Logan.Li
func (ctrl *ProductController) GetAll(c *gin.Context) {
	products, err := ctrl.svc.GetAll()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"code": 0, "data": products})
}

// Get 产品详情 // Logan.Li
func (ctrl *ProductController) Get(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
	product, err := ctrl.svc.GetByID(uint(id))
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 404, "message": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"code": 0, "data": product})
}

// GetByCode 按产品编码返回产品及上架计划（公开接口） // Logan.Li
func (ctrl *ProductController) GetByCode(c *gin.Context) {
	code := c.Param("code")
	product, err := ctrl.svc.GetByCode(code)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 404, "message": err.Error()})
		return
	}
	plans, err := ctrl.planSvc.GetByProduct(product.ID)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"code": 0, "data": dto.ProductWithPlansResponse{
		Product: *product,
		Plans:   plans,
	}})
}

// Create 创建产品 // Logan.Li
func (ctrl *ProductController) Create(c *gin.Context) {
	var req dto.ProductCreate
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
		return
	}
	product, err := ctrl.svc.Create(req)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
		return
	}
	utils.LogAction(ctrl.db, c, "create", "product", product.ID, product.Name, "", "", "创建产品")
	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "创建成功", "data": product})
}

// Update 更新产品 // Logan.Li
func (ctrl *ProductController) Update(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
	var req dto.ProductUpdate
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
		return
	}
	product, err := ctrl.svc.Update(uint(id), req)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
		return
	}
	utils.LogAction(ctrl.db, c, "update", "product", product.ID, product.Name, "", "", "更新产品")
	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "更新成功", "data": product})
}

// Delete 删除产品 // Logan.Li
func (ctrl *ProductController) Delete(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
	if err := ctrl.svc.Delete(uint(id)); err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
		return
	}
	utils.LogAction(ctrl.db, c, "delete", "product", uint(id), "", "", "", "删除产品")
	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "删除成功"})
}

// UpdateStatus 切换上下架 // Logan.Li
func (ctrl *ProductController) UpdateStatus(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
	var req struct {
		Status int `json:"status"`
	}
	c.ShouldBindJSON(&req)
	if err := ctrl.svc.UpdateStatus(uint(id), req.Status); err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
		return
	}
	utils.LogAction(ctrl.db, c, "update_status", "product", uint(id), "", "", "", fmt.Sprintf("切换状态为 %d", req.Status))
	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "状态更新成功"})
}