package routers

import (
	"encoding/json"
	"log"
	"net/http"
	"recipe-manager/data"
	"recipe-manager/models"
	"sort"
	"strconv"

	"github.com/go-chi/chi/v5"
)

type RecipeRouter struct {
	data *data.Data
}

func NewRecipeRouter(data *data.Data) *RecipeRouter {
	return &RecipeRouter{
		data: data,
	}
}

func (rr *RecipeRouter) Route(r chi.Router) {
	r.Route("/recipes", func(r chi.Router) {
		r.Get("/", func(w http.ResponseWriter, r *http.Request) {
			w.Header().Add("Content-Type", "application/json")
			var take, offset uint64 = 10, 0
			if newOffset, err := strconv.ParseUint(r.URL.Query().Get("offset"), 10, 64); err == nil {
				offset = newOffset
			}

			if newTake, err := strconv.ParseUint(r.URL.Query().Get("take"), 10, 64); err == nil {
				take = newTake
			}

			// copy the strcut to avoid modifying the original
			recipe := rr.data.GetRecipe()
			isHasMore := len(recipe.Recipe01) >= int(take+offset)
			if isHasMore {
				recipe.Recipe01 = recipe.Recipe01[offset : take+offset]
				sort.Slice(recipe.Recipe01, func(i, j int) bool {
					return recipe.Recipe01[i].ID < recipe.Recipe01[j].ID
				})
			} else if len(recipe.Recipe01) > int(offset) {
				log.Println("offset", offset, "len", len(recipe.Recipe01))
				recipe.Recipe01 = recipe.Recipe01[offset:]
			} else {
				recipe.Recipe01 = []models.Recipe01{}
			}

			json.NewEncoder(w).Encode(map[string]interface{}{
				"recipes": recipe,
				"hasMore": isHasMore,
			})
		})
	})
}