package handlers

import (
	"errors"
	"net/http"

	"galaxy/rtmanager/internal/domain/runtime"
	"galaxy/rtmanager/internal/service/startruntime"
)

// newGetHandler returns the handler for
// `GET /api/v1/internal/runtimes/{game_id}`. The handler reads
// directly from the runtime record store and translates
// `runtime.ErrNotFound` to `404 not_found`. Like list, it does not
// run through the service layer and does not produce an operation_log
// row.
func newGetHandler(deps Dependencies) http.HandlerFunc {
	logger := loggerFor(deps.Logger, "internal_rest.get")
	return func(writer http.ResponseWriter, request *http.Request) {
		if deps.RuntimeRecords == nil {
			writeError(writer, http.StatusInternalServerError,
				startruntime.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 errors.Is(err, runtime.ErrNotFound) {
			writeError(writer, http.StatusNotFound,
				startruntime.ErrorCodeNotFound,
				"runtime record not found",
			)
			return
		}
		if err != nil {
			logger.ErrorContext(request.Context(), "get runtime record",
				"game_id", gameID,
				"err", err.Error(),
			)
			writeError(writer, http.StatusInternalServerError,
				startruntime.ErrorCodeInternal,
				"failed to read runtime record",
			)
			return
		}

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