package api

import (
	"net/http"

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

	"git.avsdev.uk/Go/job-search/internal/httpx"
	"git.avsdev.uk/Go/job-search/internal/store"
)

// classificationRoutes wires HTTP handlers to the classification codes in
// the opportunity store. They're read-only.
type classificationRoutes struct {
	store *store.Store
}

// newClassificationRoutes returns the classification handlers for
// opportunityStore.
func newClassificationRoutes(
	opportunityStore *store.Store,
) *classificationRoutes {
	return &classificationRoutes{
		store: opportunityStore,
	}
}

// Routes registers the classification routes on router (mounted under
// /api).
func (h *classificationRoutes) Routes(router chi.Router) {
	router.Get("/classifications", h.list)
}

// list serves GET /classifications: every classification code that at least
// one opportunity has, ordered by code.
//
//	@Summary		List classifications
//	@Description	Every classification code (CPV and others) that at least one
//	@Description	stored opportunity has, once each, ordered by code: the
//	@Description	codes worth filtering opportunities by.
//	@Tags			classifications
//	@Produce		json
//	@Success		200	{array}		types.ClassificationCode
//	@Failure		500	{object}	httpx.Problem
//	@Router			/classifications [get]
func (h *classificationRoutes) list(w http.ResponseWriter, r *http.Request) {
	classifications, err := h.store.ListClassifications(r.Context())
	if err != nil {
		httpx.WriteProblem(w, r, http.StatusInternalServerError, "")
		return
	}

	httpx.WriteJSON(w, http.StatusOK, classifications)
}