package api

import (
	"context"
	"git.brettb.xyz/goinv/server/internal/types"
	"github.com/go-chi/chi/v5"
	"github.com/go-chi/render"
	"net/http"
	"strconv"
)

func (s *APIServer) setupCategoryRoutes() func(chi.Router) {
	return func(r chi.Router) {
		r.Get("/", makeHandler(s.getCategories))
		r.Post("/", makeHandler(s.createCategory))

		r.Route("/{categoryID}", func(r chi.Router) {
			r.Use(s.CategoryCtx)
			r.Get("/", makeHandler(s.getCategory))
			r.Delete("/", makeHandler(s.deleteCategory))
		})
	}
}

func (s *APIServer) CategoryCtx(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		categoryIdStr := chi.URLParam(r, "categoryID")
		categoryId, err := strconv.ParseUint(categoryIdStr, 10, 64)
		if err != nil {
			render.Render(w, r, errNotFound)
			return
		}
		shelf, err := s.db.GetCategoryByID(categoryId)
		if err != nil {
			render.Render(w, r, errNotFound)
			return
		}
		ctx := context.WithValue(r.Context(), "category", shelf)
		next.ServeHTTP(w, r.WithContext(ctx))
	})
}

func (s *APIServer) getCategories(w http.ResponseWriter, r *http.Request) error {
	categories, err := s.db.GetCategories(0, 10)
	if err != nil {
		return err
	}

	total, err := s.db.TotalCategories()
	if err != nil {
		return err
	}

	return render.Render(w, r, &types.MultipleCategoryResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		Categories: categories,
		Total:      total,
	})
}

func (s *APIServer) getCategory(w http.ResponseWriter, r *http.Request) error {
	ctx := r.Context()
	category, ok := ctx.Value("category").(*types.Category)
	if !ok {
		return render.Render(w, r, errUnprocessable)
	}

	return render.Render(w, r, &types.CategoryResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		Category: category,
	})
}

func (s *APIServer) deleteCategory(w http.ResponseWriter, r *http.Request) error {
	ctx := r.Context()
	category, ok := ctx.Value("category").(*types.Category)
	if !ok {
		return render.Render(w, r, errUnprocessable)
	}

	if ok, _ := s.db.DeleteCategoryByID(category.ID); !ok {
		return render.Render(w, r, errUnprocessable)
	}

	return render.Render(w, r, &types.CategoryResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		Category: category,
	})
}

func (s *APIServer) createCategory(w http.ResponseWriter, r *http.Request) error {
	data := &types.CreateCategoryRequest{}
	if err := render.Bind(r, data); err != nil {
		return render.Render(w, r, errBadRequest(err))
	}

	category := &types.Category{
		Name: data.Name,
	}

	err := s.db.CreateCategory(category)
	if err != nil {
		return err
	}

	return render.Render(w, r, &types.CategoryResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		Category: category,
	})
}