package controller

import (
	"net/http"
	"strconv"

	"ezops/model"

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

// NavigationHandler 导航处理器
type NavigationHandler struct {
	db *gorm.DB
}

// NewNavigationHandler 创建导航处理器
func NewNavigationHandler(db *gorm.DB) *NavigationHandler {
	return &NavigationHandler{db: db}
}

// ListGroups 获取导航分组列表
// @Summary 获取导航分组列表
// @Description 获取所有导航分组列表
// @Tags 站内导航
// @Produce json
// @Security Bearer
// @Success 200 {object} model.Response{data=[]model.NavigationGroup}
// @Router /navigations/groups [get]
func (h *NavigationHandler) ListGroups(c *gin.Context) {
	var groups []model.NavigationGroup
	h.db.Order("sort ASC, created_at ASC").Find(&groups)

	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "success",
		Data:    groups,
	})
}

// CreateGroup 创建导航分组
// @Summary 创建导航分组
// @Description 创建新导航分组
// @Tags 站内导航
// @Accept json
// @Produce json
// @Security Bearer
// @Param request body model.CreateNavigationGroupRequest true "创建请求"
// @Success 200 {object} model.Response{data=model.NavigationGroup}
// @Router /navigations/groups [post]
func (h *NavigationHandler) CreateGroup(c *gin.Context) {
	var req model.CreateNavigationGroupRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{
			Code:    400,
			Message: "请求参数错误: " + err.Error(),
		})
		return
	}

	group := model.NavigationGroup{
		Name:        req.Name,
		Code:        req.Code,
		Description: req.Description,
		Icon:        req.Icon,
		Sort:        req.Sort,
		Enabled:     true,
	}

	if err := h.db.Create(&group).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{
			Code:    500,
			Message: "创建失败",
		})
		return
	}

	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "创建成功",
		Data:    group,
	})
}

// UpdateGroup 更新导航分组
// @Summary 更新导航分组
// @Description 更新指定导航分组
// @Tags 站内导航
// @Accept json
// @Produce json
// @Security Bearer
// @Param id path int true "分组ID"
// @Param request body model.UpdateNavigationGroupRequest true "更新请求"
// @Success 200 {object} model.Response{data=model.NavigationGroup}
// @Router /navigations/groups/{id} [put]
func (h *NavigationHandler) UpdateGroup(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var req model.UpdateNavigationGroupRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{
			Code:    400,
			Message: "请求参数错误: " + err.Error(),
		})
		return
	}

	var group model.NavigationGroup
	if err := h.db.First(&group, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{
			Code:    404,
			Message: "分组不存在",
		})
		return
	}

	updates := map[string]interface{}{}
	if req.Name != "" {
		updates["name"] = req.Name
	}
	if req.Description != "" {
		updates["description"] = req.Description
	}
	if req.Icon != "" {
		updates["icon"] = req.Icon
	}
	updates["sort"] = req.Sort
	if req.Enabled != nil {
		updates["enabled"] = *req.Enabled
	}

	if err := h.db.Model(&group).Updates(updates).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{
			Code:    500,
			Message: "更新失败",
		})
		return
	}

	h.db.First(&group, id)

	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "更新成功",
		Data:    group,
	})
}

// DeleteGroup 删除导航分组
// @Summary 删除导航分组
// @Description 删除指定导航分组
// @Tags 站内导航
// @Produce json
// @Security Bearer
// @Param id path int true "分组ID"
// @Success 200 {object} model.Response
// @Router /navigations/groups/{id} [delete]
func (h *NavigationHandler) DeleteGroup(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	// 删除分组下的所有链接
	if err := h.db.Where("group_id = ?", id).Delete(&model.NavigationLink{}).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{
			Code:    500,
			Message: "删除链接失败",
		})
		return
	}

	if err := h.db.Delete(&model.NavigationGroup{}, id).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{
			Code:    500,
			Message: "删除失败",
		})
		return
	}

	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "删除成功",
	})
}

// 导航链接（Link）相关的 CRUD 及收藏功能处理器方法已拆分到 navigation_link.go
// 涉及方法: ListLinks, CreateLink, UpdateLink, DeleteLink, ToggleFavorite