package handlers

import (
	"net/http"

	"galaxy/rtmanager/internal/domain/operation"
	"galaxy/rtmanager/internal/service/startruntime"
	"galaxy/rtmanager/internal/service/stopruntime"
)

// stopRequestBody mirrors the OpenAPI StopRequest schema. The reason
// enum is validated at the service layer (`stopruntime.Input.Validate`);
// unknown values surface as `invalid_request`.
type stopRequestBody struct {
	Reason string `json:"reason"`
}

// newStopHandler returns the handler for
// `POST /api/v1/internal/runtimes/{game_id}/stop`.
func newStopHandler(deps Dependencies) http.HandlerFunc {
	logger := loggerFor(deps.Logger, "internal_rest.stop")
	return func(writer http.ResponseWriter, request *http.Request) {
		if deps.StopRuntime == nil {
			writeError(writer, http.StatusInternalServerError,
				startruntime.ErrorCodeInternal,
				"stop runtime service is not wired",
			)
			return
		}

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

		var body stopRequestBody
		if err := decodeStrictJSON(request.Body, &body); err != nil {
			writeError(writer, http.StatusBadRequest,
				startruntime.ErrorCodeInvalidRequest,
				err.Error(),
			)
			return
		}

		result, err := deps.StopRuntime.Handle(request.Context(), stopruntime.Input{
			GameID:    gameID,
			Reason:    stopruntime.StopReason(body.Reason),
			OpSource:  resolveOpSource(request),
			SourceRef: requestSourceRef(request),
		})
		if err != nil {
			logger.ErrorContext(request.Context(), "stop runtime service errored",
				"game_id", gameID,
				"err", err.Error(),
			)
			writeError(writer, http.StatusInternalServerError,
				startruntime.ErrorCodeInternal,
				"stop runtime service failed",
			)
			return
		}

		if result.Outcome == operation.OutcomeFailure {
			writeFailure(writer, result.ErrorCode, result.ErrorMessage)
			return
		}

		writeJSON(writer, http.StatusOK, encodeRuntimeRecord(result.Record))
	}
}