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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js"><span class="cstat-no" title="statement not covered" >/**<span class="fstat-no" title="function not covered" ><span class="branch-0 cbranch-no" title="branch not covered" ></span></span></span>
 * LLM Provider 注册表
 * 
 * 将 models.json 中的每家供应商抽象为独立的 ILlmProvider 实例，
 * 提供供应商级别的优先级调度和熔断保护。
 * 
 * 优先级由 models.json 中每个 vendor 的 priority 字段决定，越小越优先。
 * 同一供应商多个 Key 注册为不同的逻辑供应商（如 minimax / minimax-key2），
 * 通过相邻 priority 实现同供应商 Key 优先轮转，再跨供应商降级。
 * 
 * 统一使用 OpenAI 兼容 API（ChatOpenAI），通过 baseURL 切换供应商。
 */
&nbsp;
import { ProviderRegistry } from '../../common/provider-registry';
import { ILlmProvider, LlmModelConfig } from './provider.interface';
import { ChatOpenAI } from '@langchain/openai';
import { config } from '../../config';
import { MockLlmProvider } from './mock.provider';
&nbsp;
// ============ OpenAI 兼容 Provider 实现 ============
&nbsp;
<span class="cstat-no" title="statement not covered" >class OpenAiCompatibleLlmProvider implements ILlmProvider {</span>
<span class="cstat-no" title="statement not covered" >  readonly name: string;</span>
<span class="cstat-no" title="statement not covered" >  readonly vendor: string;</span>
<span class="cstat-no" title="statement not covered" >  readonly displayName: string;</span>
<span class="cstat-no" title="statement not covered" >  readonly baseUrl: string;</span>
<span class="cstat-no" title="statement not covered" >  readonly textModels: string[];</span>
<span class="cstat-no" title="statement not covered" >  readonly modelConfigs: Map&lt;string, LlmModelConfig&gt;;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  constructor(</span>
<span class="cstat-no" title="statement not covered" >    vendorKey: string,</span>
<span class="cstat-no" title="statement not covered" >    displayName: string,</span>
<span class="cstat-no" title="statement not covered" >    baseUrl: string,</span>
<span class="cstat-no" title="statement not covered" >    apiKey: string,</span>
<span class="cstat-no" title="statement not covered" >    models: LlmModelConfig[],</span>
<span class="cstat-no" title="statement not covered" >  ) {</span>
<span class="cstat-no" title="statement not covered" >    this.name = `${vendorKey}-llm`;</span>
<span class="cstat-no" title="statement not covered" >    this.vendor = vendorKey;</span>
<span class="cstat-no" title="statement not covered" >    this.displayName = displayName;</span>
<span class="cstat-no" title="statement not covered" >    this.baseUrl = baseUrl;</span>
<span class="cstat-no" title="statement not covered" >    this._apiKey = apiKey;</span>
<span class="cstat-no" title="statement not covered" >    this.textModels = models.filter(m =&gt; m.enabled).map(m =&gt; m.id);</span>
<span class="cstat-no" title="statement not covered" >    this.modelConfigs = new Map(models.map(m =&gt; [m.id, m]));</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  private _apiKey: string;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  createClient(modelId: string, options?: { temperature?: number; maxTokens?: number }): ChatOpenAI {</span>
<span class="cstat-no" title="statement not covered" >    const modelCfg = this.modelConfigs.get(modelId);</span>
<span class="cstat-no" title="statement not covered" >    if (!modelCfg) {</span>
<span class="cstat-no" title="statement not covered" >      throw new Error(`模型 ${modelId} 不属于供应商 ${this.name}`);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    return new ChatOpenAI({</span>
<span class="cstat-no" title="statement not covered" >      model: modelId,</span>
<span class="cstat-no" title="statement not covered" >      apiKey: this._apiKey,</span>
<span class="cstat-no" title="statement not covered" >      temperature: options?.temperature ?? modelCfg.temperature,</span>
<span class="cstat-no" title="statement not covered" >      maxTokens: options?.maxTokens ?? modelCfg.maxTokens,</span>
<span class="cstat-no" title="statement not covered" >      configuration: { baseURL: this.baseUrl },</span>
<span class="cstat-no" title="statement not covered" >    });</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  hasModel(modelId: string): boolean {</span>
<span class="cstat-no" title="statement not covered" >    return this.modelConfigs.has(modelId);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  getModelConfig(modelId: string): LlmModelConfig | undefined {</span>
<span class="cstat-no" title="statement not covered" >    return this.modelConfigs.get(modelId);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  async healthCheck(): Promise&lt;boolean&gt; {</span>
<span class="cstat-no" title="statement not covered" >    try {</span>
<span class="cstat-no" title="statement not covered" >      if (this.textModels.length === 0) return false;</span>
<span class="cstat-no" title="statement not covered" >      const client = this.createClient(this.textModels[0], { maxTokens: 10 });</span>
<span class="cstat-no" title="statement not covered" >      await client.invoke('ping');</span>
<span class="cstat-no" title="statement not covered" >      return true;</span>
<span class="cstat-no" title="statement not covered" >    } catch {</span>
<span class="cstat-no" title="statement not covered" >      return false;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
// ============ 注册表管理 ============
&nbsp;
<span class="cstat-no" title="statement not covered" >let _registry: ProviderRegistry&lt;ILlmProvider&gt; | null = null;</span>
&nbsp;
/** 将 models.json 中的模型转为 LlmModelConfig */
<span class="cstat-no" title="statement not covered" >function toLlmModelConfig(m: any): LlmModelConfig {</span>
<span class="cstat-no" title="statement not covered" >  return {</span>
<span class="cstat-no" title="statement not covered" >    id: m.id,</span>
<span class="cstat-no" title="statement not covered" >    name: m.name || m.id,</span>
<span class="cstat-no" title="statement not covered" >    contextWindow: m.contextWindow || 128000,</span>
<span class="cstat-no" title="statement not covered" >    maxTokens: m.maxTokens || 4096,</span>
<span class="cstat-no" title="statement not covered" >    temperature: m.temperature ?? 0.7,</span>
<span class="cstat-no" title="statement not covered" >    supportsToolCall: m.supportsToolCall ?? false,</span>
<span class="cstat-no" title="statement not covered" >    enabled: m.enabled ?? true,</span>
<span class="cstat-no" title="statement not covered" >    canonicalModel: m.canonicalModel,</span>
<span class="cstat-no" title="statement not covered" >  };</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/** 初始化 LLM Provider 注册表 */
<span class="cstat-no" title="statement not covered" >export function initLlmRegistry(): ProviderRegistry&lt;ILlmProvider&gt; {</span>
<span class="cstat-no" title="statement not covered" >  if (_registry) return _registry;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  _registry = new ProviderRegistry&lt;ILlmProvider&gt;();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  const vendors = (config.models as any).vendors;</span>
<span class="cstat-no" title="statement not covered" >  if (!vendors) {</span>
<span class="cstat-no" title="statement not covered" >    console.warn('[LLM Registry] models.json 中无 vendors 配置');</span>
<span class="cstat-no" title="statement not covered" >    return _registry;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  for (const [vendorKey, vendorData] of Object.entries(vendors) as [string, any][]) {</span>
<span class="cstat-no" title="statement not covered" >    if (vendorData.apiType !== 'openai-chat') continue;</span>
<span class="cstat-no" title="statement not covered" >    if (!vendorData.apiKey) {</span>
<span class="cstat-no" title="statement not covered" >      console.warn(`[LLM Registry] ${vendorKey} 缺少 apiKey，跳过`);</span>
<span class="cstat-no" title="statement not covered" >      continue;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const textModels = (vendorData.models || [])</span>
<span class="cstat-no" title="statement not covered" >      .filter((m: any) =&gt; m.input?.includes('text'))</span>
<span class="cstat-no" title="statement not covered" >      .map(toLlmModelConfig);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (textModels.length === 0) {</span>
<span class="cstat-no" title="statement not covered" >      console.log(`[LLM Registry] ${vendorKey} 无文本模型，跳过`);</span>
<span class="cstat-no" title="statement not covered" >      continue;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const provider = new OpenAiCompatibleLlmProvider(</span>
<span class="cstat-no" title="statement not covered" >      vendorKey,</span>
<span class="cstat-no" title="statement not covered" >      vendorData.name,</span>
<span class="cstat-no" title="statement not covered" >      vendorData.baseUrl,</span>
<span class="cstat-no" title="statement not covered" >      vendorData.apiKey,</span>
<span class="cstat-no" title="statement not covered" >      textModels,</span>
<span class="cstat-no" title="statement not covered" >    );</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    _registry.register(provider, {</span>
<span class="cstat-no" title="statement not covered" >      enabled: true,</span>
<span class="cstat-no" title="statement not covered" >      breakerConfig: {</span>
<span class="cstat-no" title="statement not covered" >        name: `${vendorKey}-llm`,</span>
<span class="cstat-no" title="statement not covered" >        failureThreshold: 3,</span>
<span class="cstat-no" title="statement not covered" >        cooldownMs: 60000,</span>
<span class="cstat-no" title="statement not covered" >      },</span>
<span class="cstat-no" title="statement not covered" >    });</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    console.log(`[LLM Registry] ${provider.displayName} 已注册 (${textModels.length}个模型)`);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  // Mock Provider 已禁用（生产环境使用真实 LLM 供应商）
  // if (!_registry.get('mock-llm')) {
  //   const mockProvider = new MockLlmProvider();
  //   _registry.register(mockProvider, {
  //     enabled: true,
  //     breakerConfig: { name: 'mock-llm', failureThreshold: 999, cooldownMs: 1000 },
  //   });
  //   console.log('[LLM Registry] Mock LLM 已注册（兜底，返回固定内容，不调外部API）');
  // }
&nbsp;
<span class="cstat-no" title="statement not covered" >  console.log(`[LLM Registry] 共注册 ${_registry.size} 个供应商`);</span>
<span class="cstat-no" title="statement not covered" >  return _registry;</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/** 获取 LLM Provider 注册表 */
<span class="cstat-no" title="statement not covered" >export function getLlmRegistry(): ProviderRegistry&lt;ILlmProvider&gt; {</span>
<span class="cstat-no" title="statement not covered" >  if (!_registry) {</span>
<span class="cstat-no" title="statement not covered" >    return initLlmRegistry();</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >  return _registry;</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
// ============ 便捷查询函数 ============
&nbsp;
/** 根据模型 ID 查找所属 Provider */
<span class="cstat-no" title="statement not covered" >export function findProviderForModel(modelId: string): ILlmProvider | undefined {</span>
<span class="cstat-no" title="statement not covered" >  for (const node of getLlmRegistry().listEnabled()) {</span>
<span class="cstat-no" title="statement not covered" >    if (node.provider.hasModel(modelId)) {</span>
<span class="cstat-no" title="statement not covered" >      return node.provider;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >  return undefined;</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/** 根据模型 ID 查找所属 Provider 节点 */
<span class="cstat-no" title="statement not covered" >export function findProviderNodeForModel(modelId: string) {</span>
<span class="cstat-no" title="statement not covered" >  for (const node of getLlmRegistry().listEnabled()) {</span>
<span class="cstat-no" title="statement not covered" >    if (node.provider.hasModel(modelId)) {</span>
<span class="cstat-no" title="statement not covered" >      return node;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >  return undefined;</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/** 获取所有支持工具调用的模型 */
<span class="cstat-no" title="statement not covered" >export function getToolCapableModels(): Array&lt;{ modelId: string; provider: ILlmProvider; node: any }&gt; {</span>
<span class="cstat-no" title="statement not covered" >  const result: Array&lt;{ modelId: string; provider: ILlmProvider; node: any }&gt; = [];</span>
<span class="cstat-no" title="statement not covered" >  for (const node of getLlmRegistry().listAvailable()) {</span>
<span class="cstat-no" title="statement not covered" >    for (const modelId of node.provider.textModels) {</span>
<span class="cstat-no" title="statement not covered" >      const cfg = node.provider.getModelConfig(modelId);</span>
<span class="cstat-no" title="statement not covered" >      if (cfg?.supportsToolCall) {</span>
<span class="cstat-no" title="statement not covered" >        result.push({ modelId, provider: node.provider, node });</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >  return result;</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/** 获取默认模型 ID */
<span class="cstat-no" title="statement not covered" >export function getDefaultModelId(): string {</span>
<span class="cstat-no" title="statement not covered" >  return (config.models as any).textGeneration?.defaultModel || 'MiniMax-M2.7';</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/** 获取下一个支持工具调用的模型（用于故障切换） */
<span class="cstat-no" title="statement not covered" >export function getNextToolCapableModel(currentModelId: string): string | null {</span>
<span class="cstat-no" title="statement not covered" >  const toolModels = getToolCapableModels().map(m =&gt; m.modelId);</span>
<span class="cstat-no" title="statement not covered" >  if (toolModels.length === 0) return null;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  const currentIdx = toolModels.indexOf(currentModelId);</span>
<span class="cstat-no" title="statement not covered" >  if (currentIdx === -1) return toolModels[0];</span>
<span class="cstat-no" title="statement not covered" >  return toolModels[(currentIdx + 1) % toolModels.length] || null;</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/** 获取可用供应商状态摘要 */
<span class="cstat-no" title="statement not covered" >export function getLlmStatus() {</span>
<span class="cstat-no" title="statement not covered" >  return getLlmRegistry().getStatus().map(s =&gt; ({</span>
<span class="cstat-no" title="statement not covered" >    ...s,</span>
<span class="cstat-no" title="statement not covered" >    modelCount: getLlmRegistry().get(s.name)?.provider.textModels.length || 0,</span>
<span class="cstat-no" title="statement not covered" >  }));</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
// ============ 定时健康检查 ============
&nbsp;
<span class="cstat-no" title="statement not covered" >let _healthCheckTimer: ReturnType&lt;typeof setInterval&gt; | null = null;</span>
<span class="cstat-no" title="statement not covered" >const HEALTH_CHECK_INTERVAL_MS = 30_000; // 30s</span>
&nbsp;
/** 启动定时健康检查，自动探测熔断供应商的恢复 */
<span class="cstat-no" title="statement not covered" >export function startHealthCheck(): void {</span>
<span class="cstat-no" title="statement not covered" >  if (_healthCheckTimer) return; // 已启动</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  _healthCheckTimer = setInterval(async () =&gt; {</span>
<span class="cstat-no" title="statement not covered" >    const registry = getLlmRegistry();</span>
&nbsp;
    // 检查熔断恢复
<span class="cstat-no" title="statement not covered" >    const broken = registry.listBroken();</span>
<span class="cstat-no" title="statement not covered" >    for (const node of broken) {</span>
<span class="cstat-no" title="statement not covered" >      try {</span>
        // 触发熔断器的 getState()，让 OPEN → HALF_OPEN 自动转换
<span class="cstat-no" title="statement not covered" >        const state = node.breaker.getState();</span>
<span class="cstat-no" title="statement not covered" >        if (state === 'HALF_OPEN') {</span>
<span class="cstat-no" title="statement not covered" >          console.log(`[LLM HealthCheck] ${node.provider.displayName} 熔断冷却期已过，尝试探测...`);</span>
          // 发送轻量请求探测恢复
<span class="cstat-no" title="statement not covered" >          const healthy = await node.provider.healthCheck?.();</span>
<span class="cstat-no" title="statement not covered" >          if (healthy) {</span>
<span class="cstat-no" title="statement not covered" >            node.breaker.reset();</span>
<span class="cstat-no" title="statement not covered" >            console.log(`[LLM HealthCheck] ✅ ${node.provider.displayName} 熔断器已恢复`);</span>
<span class="cstat-no" title="statement not covered" >          } else {</span>
<span class="cstat-no" title="statement not covered" >            console.log(`[LLM HealthCheck] ❌ ${node.provider.displayName} 探测失败，继续熔断`);</span>
<span class="cstat-no" title="statement not covered" >          }</span>
<span class="cstat-no" title="statement not covered" >        }</span>
<span class="cstat-no" title="statement not covered" >      } catch {</span>
        // 探测异常，保持熔断
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // 检查额度耗尽恢复
<span class="cstat-no" title="statement not covered" >    const exhausted = registry.listExhausted();</span>
<span class="cstat-no" title="statement not covered" >    for (const node of exhausted) {</span>
<span class="cstat-no" title="statement not covered" >      try {</span>
<span class="cstat-no" title="statement not covered" >        const healthy = await node.provider.healthCheck?.();</span>
<span class="cstat-no" title="statement not covered" >        if (healthy) {</span>
<span class="cstat-no" title="statement not covered" >          registry.clearExhausted(node.provider.name);</span>
<span class="cstat-no" title="statement not covered" >          console.log(`[LLM HealthCheck] ✅ ${node.provider.displayName} 额度已恢复`);</span>
<span class="cstat-no" title="statement not covered" >        }</span>
<span class="cstat-no" title="statement not covered" >      } catch {</span>
        // 探测失败，保持耗尽
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }, HEALTH_CHECK_INTERVAL_MS);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  console.log(`[LLM HealthCheck] 已启动，间隔 ${HEALTH_CHECK_INTERVAL_MS / 1000}s`);</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
/** 停止定时健康检查 */
<span class="cstat-no" title="statement not covered" >export function stopHealthCheck(): void {</span>
<span class="cstat-no" title="statement not covered" >  if (_healthCheckTimer) {</span>
<span class="cstat-no" title="statement not covered" >    clearInterval(_healthCheckTimer);</span>
<span class="cstat-no" title="statement not covered" >    _healthCheckTimer = null;</span>
<span class="cstat-no" title="statement not covered" >    console.log('[LLM HealthCheck] 已停止');</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;</pre></td></tr></table></pre>

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