package commandexecute

// Stable error codes returned in `Result.ErrorCode`. The values match the
// vocabulary frozen by `gamemaster/README.md §Error Model` and
// `gamemaster/api/internal-openapi.yaml`. Stage 19's REST handler imports
// these names rather than redeclare them; renaming any of them is a
// contract change.
const (
	// ErrorCodeInvalidRequest reports that the request envelope failed
	// structural validation (empty required field, malformed payload,
	// non-object payload, payload missing the `commands` array).
	ErrorCodeInvalidRequest = "invalid_request"

	// ErrorCodeRuntimeNotFound reports that no `runtime_records` row
	// exists for the requested game id.
	ErrorCodeRuntimeNotFound = "runtime_not_found"

	// ErrorCodeRuntimeNotRunning reports that the runtime exists but its
	// current status is not `running`. Hot-path commands are rejected
	// outside the running state to avoid racing with admin transitions
	// and turn generation.
	ErrorCodeRuntimeNotRunning = "runtime_not_running"

	// ErrorCodeForbidden reports that the caller is not an active member
	// of the game, or that the (game_id, user_id) pair lacks a player
	// mapping. Either way the caller is not authorised to act.
	ErrorCodeForbidden = "forbidden"

	// ErrorCodeEngineUnreachable reports that the engine /api/v1/command
	// call returned a 5xx status, timed out, or could not be dispatched.
	ErrorCodeEngineUnreachable = "engine_unreachable"

	// ErrorCodeEngineValidationError reports that the engine returned
	// 4xx with a per-command result. The body is forwarded verbatim
	// through `Result.RawResponse` so the gateway can surface the
	// per-command error vocabulary.
	ErrorCodeEngineValidationError = "engine_validation_error"

	// ErrorCodeEngineProtocolViolation reports that the engine response
	// did not match the expected schema (malformed JSON, unexpected
	// types). Stage 19 maps this to 502.
	ErrorCodeEngineProtocolViolation = "engine_protocol_violation"

	// ErrorCodeServiceUnavailable reports that a steady-state dependency
	// (PostgreSQL, Lobby) was unreachable for this call.
	ErrorCodeServiceUnavailable = "service_unavailable"

	// ErrorCodeInternal reports an unexpected error not classified by
	// the other codes.
	ErrorCodeInternal = "internal_error"
)