package handlers

import (
	"net/http"

	"galaxy/gamemaster/internal/domain/operation"
	"galaxy/gamemaster/internal/service/adminpatch"
)

// patchRuntimeRequestBody mirrors the OpenAPI PatchRuntimeRequest
// schema.
type patchRuntimeRequestBody struct {
	Version string `json:"version"`
}

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

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

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

		result, err := deps.PatchRuntime.Handle(request.Context(), adminpatch.Input{
			GameID:    gameID,
			Version:   body.Version,
			OpSource:  resolveOpSource(request),
			SourceRef: requestSourceRef(request),
		})
		if err != nil {
			logger.ErrorContext(request.Context(), "patch runtime service errored",
				"game_id", gameID,
				"err", err.Error(),
			)
			writeError(writer, http.StatusInternalServerError, errorCodeInternal, "patch runtime service failed")
			return
		}

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

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