package controller

import (
	"errors"
	"net/http"

	"github.com/Caknoooo/go-gin-clean-starter/modules/menu/dto"
	"github.com/Caknoooo/go-gin-clean-starter/modules/menu/query"
	"github.com/Caknoooo/go-gin-clean-starter/modules/menu/service"
	"github.com/Caknoooo/go-gin-clean-starter/pkg/constants"
	"github.com/Caknoooo/go-gin-clean-starter/pkg/utils"
	"github.com/Caknoooo/go-pagination"
	"github.com/gin-gonic/gin"
	"github.com/samber/do"
	"gorm.io/gorm"
)

type (
	MenuController interface {
		CreateMenu(ctx *gin.Context)
		GetMenuByID(ctx *gin.Context)
		GetMenuByName(ctx *gin.Context)
		GetMenus(ctx *gin.Context)
		UpdateMenu(ctx *gin.Context)
		DeleteMenu(ctx *gin.Context)
	}

	menuController struct {
		menuService service.MenuService
		db          *gorm.DB
	}
)

// CreateMenu implements MenuController.
func (m *menuController) CreateMenu(ctx *gin.Context) {
	var req dto.MenuCreateRequest
	if err := ctx.ShouldBind(&req); err != nil {
		res := utils.BuildResponseFailed(dto.MESSAGE_FAILED_GET_DATA_FROM_BODY, err.Error(), nil)
		ctx.AbortWithStatusJSON(http.StatusBadRequest, res)
		return
	}

	in := dto.MenuResponse{
		Name:     req.Name,
		IconUrl:  req.IconUrl,
		Url:      req.Url,
		Sequence: req.Sequence,
		Mode:     req.Mode,
		Status:   req.Status,
	}
	if req.ParentID != nil {
		in.Parent = &dto.MenuParentResponse{ID: req.ParentID.String()}
	}

	res, err := m.menuService.Create(ctx.Request.Context(), in)
	if err != nil {
		resp := utils.BuildResponseFailed(dto.MESSAGE_FAILED_CREATE_MENU, err.Error(), nil)
		ctx.JSON(http.StatusBadRequest, resp)
		return
	}

	resp := utils.BuildResponseSuccess(dto.MESSAGE_SUCCESS_CREATE_MENU, res)
	ctx.JSON(http.StatusOK, resp)
}

// GetMenus implements MenuController.
func (m *menuController) GetMenus(ctx *gin.Context) {
	_ = ctx.MustGet("client_id").(string)
	var filter = &query.MenuFilter{
		// ClientID: clientId,
		Name:     ctx.Query("name"),
		ParentID: ctx.Query("parent_id"),
		Includes: ctx.QueryArray("includes"),
	}
	filter.BindPagination(ctx)
	ctx.ShouldBindQuery(filter)
	menus, total, err := pagination.PaginatedQueryWithIncludable[query.M_Menu](m.db, filter)
	if err != nil {
		res := utils.BuildResponseFailed(dto.MESSAGE_FAILED_GET_LIST_MENU, err.Error(), nil)
		ctx.JSON(http.StatusBadRequest, res)
		return
	}

	menuResponses := ToMenuResponses(menus)
	paginationResponse := pagination.CalculatePagination(filter.Pagination, total)
	response := pagination.NewPaginatedResponse(http.StatusOK, dto.MESSAGE_SUCCESS_GET_LIST_MENU, menuResponses, paginationResponse)
	ctx.JSON(http.StatusOK, response)
}

// GetMenuByID implements MenuController.
func (m *menuController) GetMenuByID(ctx *gin.Context) {
	id := ctx.Param("id")
	if id == "" {
		res := utils.BuildResponseFailed(dto.MESSAGE_FAILED_GET_MENU, "id is required", nil)
		ctx.JSON(http.StatusBadRequest, res)
		return
	}

	res, err := m.menuService.GetById(ctx.Request.Context(), id)
	if err != nil {
		resErr := utils.BuildResponseFailed(dto.MESSAGE_FAILED_GET_MENU, err.Error(), nil)
		ctx.JSON(http.StatusBadRequest, resErr)
		return
	}

	resp := utils.BuildResponseSuccess(dto.MESSAGE_SUCCESS_GET_MENU, res)
	ctx.JSON(http.StatusOK, resp)
}

// GetMenuByName implements MenuController.
func (m *menuController) GetMenuByName(ctx *gin.Context) {
	name := ctx.Query("name")
	if name == "" {
		res := utils.BuildResponseFailed(dto.MESSAGE_FAILED_GET_MENU, "name query is required", nil)
		ctx.JSON(http.StatusBadRequest, res)
		return
	}

	res, err := m.menuService.GetByName(ctx.Request.Context(), name)
	if err != nil {
		resErr := utils.BuildResponseFailed(dto.MESSAGE_FAILED_GET_MENU, err.Error(), nil)
		ctx.JSON(http.StatusBadRequest, resErr)
		return
	}

	resp := utils.BuildResponseSuccess(dto.MESSAGE_SUCCESS_GET_MENU, res)
	ctx.JSON(http.StatusOK, resp)
}

// UpdateMenu implements MenuController.
func (m *menuController) UpdateMenu(ctx *gin.Context) {
	var req dto.MenuUpdateRequest
	if err := ctx.ShouldBind(&req); err != nil {
		res := utils.BuildResponseFailed(dto.MESSAGE_FAILED_GET_DATA_FROM_BODY, err.Error(), nil)
		ctx.AbortWithStatusJSON(http.StatusBadRequest, res)
		return
	}

	menuId := ctx.Param("id")
	result, err := m.menuService.Update(ctx.Request.Context(), menuId, req)
	if err != nil {
		res := utils.BuildResponseFailed(dto.MESSAGE_FAILED_UPDATE_MENU, err.Error(), nil)
		ctx.JSON(http.StatusBadRequest, res)
		return
	}

	resp := utils.BuildResponseSuccess(dto.MESSAGE_SUCCESS_UPDATE_MENU, result)
	ctx.JSON(http.StatusOK, resp)
}

// DeleteMenu implements MenuController.
func (m *menuController) DeleteMenu(ctx *gin.Context) {
	id := ctx.Param("id")
	if id == "" {
		res := utils.BuildResponseFailed(dto.MESSAGE_FAILED_DELETE_MENU, "id is required", nil)
		ctx.JSON(http.StatusBadRequest, res)
		return
	}

	if err := m.menuService.Delete(ctx.Request.Context(), id); err != nil {
		// if record not found, return 404
		if errors.Is(err, gorm.ErrRecordNotFound) {
			ctx.JSON(http.StatusNotFound, gin.H{"error": "menu not found"})
			return
		}
		res := utils.BuildResponseFailed(dto.MESSAGE_FAILED_DELETE_MENU, err.Error(), nil)
		ctx.JSON(http.StatusBadRequest, res)
		return
	}

	resp := utils.BuildResponseSuccess(dto.MESSAGE_SUCCESS_DELETE_MENU, nil)
	ctx.JSON(http.StatusOK, resp)
}

func NewMenuController(i *do.Injector, ms service.MenuService) MenuController {
	db := do.MustInvokeNamed[*gorm.DB](i, constants.DB)
	return &menuController{
		menuService: ms,
		db:          db,
	}
}

// Fungsi transform dari entities ke DTO
func ToMenuResponse(menu query.M_Menu) dto.MenuResponse {
	response := dto.MenuResponse{
		ID:       menu.ID.String(),
		Name:     menu.Name,
		IconUrl:  menu.IconUrl,
		Url:      menu.Url,
		Sequence: menu.Sequence,
		Mode:     menu.Mode,
		Status:   menu.Status,
	}
	// Handle parent jika ada
	if menu.Parent != nil {
		response.Parent = &dto.MenuParentResponse{
			ID:   menu.Parent.ID.String(),
			Name: menu.Parent.Name,
		}
	}

	return response
}

func ToMenuResponses(menus []query.M_Menu) []dto.MenuResponse {
	responses := make([]dto.MenuResponse, len(menus))
	for i, menu := range menus {
		responses[i] = ToMenuResponse(menu)
	}
	return responses
}