package handlers

import (
	"errors"
	"net/http"

	"galaxy/gamemaster/internal/domain/runtime"
)

// newGetRuntimeHandler returns the handler for
// `GET /api/v1/internal/runtimes/{game_id}`. Reads from
// `RuntimeRecordsReader.Get` and translates `runtime.ErrNotFound` to
// `404 runtime_not_found`.
func newGetRuntimeHandler(deps Dependencies) http.HandlerFunc {
	logger := loggerFor(deps.Logger, "internal_rest.get_runtime")
	return func(writer http.ResponseWriter, request *http.Request) {
		if deps.RuntimeRecords == nil {
			writeError(writer, http.StatusInternalServerError, errorCodeInternal, "runtime records store is not wired")
			return
		}

		gameID, ok := extractGameID(writer, request)
		if !ok {
			return
		}

		record, err := deps.RuntimeRecords.Get(request.Context(), gameID)
		if err != nil {
			if errors.Is(err, runtime.ErrNotFound) {
				writeError(writer, http.StatusNotFound, errorCodeRuntimeNotFound, "runtime not found")
				return
			}
			logger.ErrorContext(request.Context(), "get runtime record failed",
				"game_id", gameID,
				"err", err.Error(),
			)
			writeError(writer, http.StatusInternalServerError, errorCodeInternal, "failed to read runtime record")
			return
		}

		writeJSON(writer, http.StatusOK, encodeRuntimeRecord(record))
	}
}