/*
 * 文件定位：Agent 运行态实现层 / 运行契约面。
 * 核心目的：承载 runtime State Contract 这一能力位点。
 * 能力要求1：需要把文件名表达的能力落实成清晰的类型、输入输出和最小行为。
 * 能力要求2：如果后续发现语义不足，应优先补接口契约，而不是把逻辑散落到相邻文件。
 * 边界：承托和治理运行态，不吞并执行引擎、模型适配器或官方模块内部实现。
 * 对接：需要服务 applicationSurface、officialModuleSurface、governancePlane、invocationMethod 和 inspection/debug 等运行面。
 * 实现提示：先补稳定类型契约、最小可测行为和清晰错误边界，再接入真实执行逻辑。
 */
const allowedStatePhases = ["created", "ready", "invoking", "streaming", "paused", "closed", "failed"];
function isBlank(value) {
    return typeof value !== "string" || value.trim().length === 0;
}
function isRuntimeStatePhase(value) {
    return allowedStatePhases.includes(value);
}
function failure(code, message, boundary) {
    return {
        ok: false,
        error: { code, message, boundary, stateSafe: true },
        events: ["runtime.stateContract.rejected"],
    };
}
export function defineRuntimeStateContract(request) {
    if (request === undefined || isBlank(request.runtimeId)) {
        return failure("MISSING_RUNTIME_ID", "runtime state contract requires a runtimeId", "input");
    }
    if (isBlank(request.phase)) {
        return failure("MISSING_STATE_PHASE", "runtime state contract requires a state phase", "input");
    }
    const phase = (request.phase ?? "").trim();
    if (!isRuntimeStatePhase(phase)) {
        return failure("INVALID_STATE_PHASE", `runtime state phase ${phase} is not part of this contract`, "input");
    }
    const revision = request.revision ?? 0;
    if (request.expectedRevision !== undefined && request.expectedRevision !== revision) {
        return failure("STALE_STATE_REVISION", `runtime state revision ${revision} does not match expected revision ${request.expectedRevision}`, "runtime-state");
    }
    if (request.contract?.accepted === false) {
        return failure("CONTRACT_REJECTED", request.contract.reason ?? "runtime state contract was rejected by contract surface", "contract");
    }
    if (request.governance?.accepted === false) {
        return failure("GOVERNANCE_REJECTED", request.governance.reason ?? "runtime state contract was rejected by governance", "governance");
    }
    return {
        ok: true,
        state: {
            runtimeId: (request.runtimeId ?? "").trim(),
            phase,
            revision,
            observedBy: request.observedBy === undefined
                ? undefined
                : {
                    kind: request.observedBy.kind,
                    id: request.observedBy.id.trim(),
                },
            visibility: "contract-surface",
            mutable: false,
            unsafeSideEffects: false,
        },
        events: ["runtime.stateContract.accepted"],
    };
}
