package httpx

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

	"cmr-backend/internal/apperr"
)

func WriteJSON(w http.ResponseWriter, status int, payload any) {
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.WriteHeader(status)
	_ = json.NewEncoder(w).Encode(payload)
}

func WriteError(w http.ResponseWriter, err error) {
	if appErr := apperr.From(err); appErr != nil {
		WriteJSON(w, appErr.Status, map[string]any{
			"error": map[string]any{
				"code":    appErr.Code,
				"message": appErr.Message,
			},
		})
		return
	}

	WriteJSON(w, http.StatusInternalServerError, map[string]any{
		"error": map[string]any{
			"code":    "internal_error",
			"message": "internal server error",
		},
	})
}

func DecodeJSON(r *http.Request, dst any) error {
	decoder := json.NewDecoder(r.Body)
	decoder.DisallowUnknownFields()
	return decoder.Decode(dst)
}