package handler

import (
	"strconv"

	"gotest/internal/service"

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

// FoodHandler 外卖数据处理器
type FoodHandler struct {
	svc *service.FoodService
}

// NewFoodHandler 创建外卖数据处理器
func NewFoodHandler(svc *service.FoodService) *FoodHandler {
	return &FoodHandler{svc: svc}
}

// GetHomeData 获取外卖首页数据 GET /api/v1/food/home
func (h *FoodHandler) GetHomeData(c *gin.Context) {
	data, err := h.svc.GetHomeData()
	if err != nil {
		FailInternal(c, "获取首页数据失败")
		return
	}
	Success(c, data)
}

// ListCategories 获取餐厅分类 GET /api/v1/food/categories
func (h *FoodHandler) ListCategories(c *gin.Context) {
	data, err := h.svc.ListCategories()
	if err != nil {
		FailInternal(c, "获取分类失败")
		return
	}
	Success(c, data)
}

// ListRestaurants 获取餐厅列表 GET /api/v1/food/restaurants?category_id=&keyword=&sort=&page=&page_size=
func (h *FoodHandler) ListRestaurants(c *gin.Context) {
	categoryID, _ := strconv.ParseUint(c.Query("category_id"), 10, 64)
	keyword := c.Query("keyword")
	sort := c.Query("sort")
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "12"))
	if page < 1 {
		page = 1
	}
	if pageSize < 1 || pageSize > 100 {
		pageSize = 12
	}
	data, err := h.svc.ListRestaurants(uint(categoryID), keyword, sort, page, pageSize)
	if err != nil {
		FailInternal(c, "获取餐厅列表失败")
		return
	}
	Success(c, data)
}

// GetRestaurant 获取餐厅详情 GET /api/v1/food/restaurants/:id
func (h *FoodHandler) GetRestaurant(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		FailBadRequest(c, "无效的餐厅 ID")
		return
	}
	data, err := h.svc.GetRestaurant(uint(id))
	if err != nil {
		FailBadRequest(c, "餐厅不存在")
		return
	}
	Success(c, data)
}

// GetRestaurantMenu 获取餐厅菜单 GET /api/v1/food/restaurants/:id/menu
func (h *FoodHandler) GetRestaurantMenu(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		FailBadRequest(c, "无效的餐厅 ID")
		return
	}
	data, err := h.svc.GetRestaurantMenu(uint(id))
	if err != nil {
		FailBadRequest(c, "菜单获取失败")
		return
	}
	Success(c, data)
}

// ListFeatured 获取推荐餐厅 GET /api/v1/food/featured?limit=
func (h *FoodHandler) ListFeatured(c *gin.Context) {
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "8"))
	if limit < 1 || limit > 50 {
		limit = 8
	}
	data, err := h.svc.ListFeatured(limit)
	if err != nil {
		FailInternal(c, "获取推荐餐厅失败")
		return
	}
	Success(c, data)
}