package api

import (
	"context"
	"net/http"
	"strconv"

	"git.brettb.xyz/goinv/server/internal/types"
	"github.com/go-chi/chi/v5"
	"github.com/go-chi/render"
)

func (s *APIServer) setupShelfRoutes() func(chi.Router) {
	return func(r chi.Router) {
		r.Get("/", makeHandler(s.getShelves))
		r.Post("/", makeHandler(s.createShelf))

		r.Route("/{shelfId}", func(r chi.Router) {
			r.Use(s.ShelfCtx)
			r.Get("/", makeHandler(s.getShelf))
			r.Delete("/", makeHandler(s.deleteShelf))
			r.Put("/", makeHandler(s.updateShelf))
			r.Get("/count", makeHandler(s.getShelfAssetCount))
		})
	}
}

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

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

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

	return render.Render(w, r, &types.MultipleShelfResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		ShelfLocations: shelves,
		Total:          total,
	})
}

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

	return render.Render(w, r, &types.ShelfResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		ShelfLocation: shelf,
	})
}

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

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

	return render.Render(w, r, &types.ShelfResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		ShelfLocation: shelf,
	})
}

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

	shelf := &types.ShelfLocation{
		Name:        data.Name,
		RoomNumber:  data.RoomNumber,
		Description: data.Description,
		BuildingID:  *data.BuildingID,
	}

	err := s.db.CreateShelfLocation(shelf)
	if err != nil {
		return err
	}

	return render.Render(w, r, &types.ShelfResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		ShelfLocation: shelf,
	})
}

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

	count, err := s.db.AssetCountInLocation(shelf.ID)
	if err != nil {
		return err
	}

	return render.Render(w, r, &types.CountResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		Count: count,
	})
}

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

	data := &types.CreateShelfRequest{}
	if err := render.Bind(r, data); err != nil {
		return render.Render(w, r, errBadRequest(err))
	}

	shelf := &types.ShelfLocation{
		ID:         eShelf.ID,
		Name:       data.Name,
		BuildingID: *data.BuildingID,
		RoomNumber: data.RoomNumber,
	}

	err := s.db.UpdateShelfLocation(eShelf.ID, shelf)
	if err != nil {
		return err
	}

	return render.Render(w, r, &types.ShelfResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		ShelfLocation: shelf,
	})
}