// Package server builds the MealQuest HTTP router.
package server

import (
	"encoding/json"
	"log/slog"
	"net/http"

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

// NewRouter returns the HTTP handler for the service. version is reported by
// GET /health.
func NewRouter(logger *slog.Logger, version string) http.Handler {
	r := chi.NewRouter()
	r.Get("/health", health(logger, version))
	return r
}

type healthResponse struct {
	Status  string `json:"status"`
	Version string `json:"version"`
}

func health(logger *slog.Logger, version string) http.HandlerFunc {
	body, err := json.Marshal(healthResponse{Status: "ok", Version: version})
	if err != nil {
		panic(err) // two string fields cannot fail to marshal
	}
	return func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(http.StatusOK)
		if _, err := w.Write(body); err != nil {
			logger.WarnContext(r.Context(), "write health response", "error", err)
		}
	}
}