import { streamText } from "ai";
import { openai } from "@ai-sdk/openai";

async function runStreaming() {
  const result = await streamText({
    model: openai("gpt-4o-mini"),
    system: "你是一名资深全栈工程师，回答精准干练。",
    prompt: "请解释 React 19 的 Server Actions 对前后端通信范式带来了什么改变？",
  });

  // 服务端控制台直接流式消费
  for await (const textChunk of result.textStream) {
    process.stdout.write(textChunk);
  }
}

import { generateObject } from "ai";
import { anthropic } from "@ai-sdk/anthropic";
import { z } from "zod";

// 声明严格的返回 Schema
const ServerMetricsSchema = z.object({
  serviceName: z.string().describe("微服务名称"),
  healthStatus: z.enum(["HEALTHY", "DEGRADED", "DOWN"]),
  cpuUsagePercent: z.number().describe("CPU 占用百分比 (0-100)"),
  criticalAlerts: z.array(z.string()).describe("告警事件摘要"),
});

type ServerMetrics = z.infer<typeof ServerMetricsSchema>;

async function inspectServer() {
  const { object } = await generateObject({
    model: anthropic("claude-3-5-sonnet-20241022"),
    schema: ServerMetricsSchema,
    prompt: "生产集群的结算中心服务目前延迟飙升至 2500ms，内存已达 88%，生成审计快照。",
  });

  // object 自动具备 ServerMetrics 完整 TypeScript 类型提示
  console.log("解析出的状态:", object.healthStatus);
  console.log("告警列表:", object.criticalAlerts);
}

import { generateText, tool } from "ai";
import { openai } from "@ai-sdk/openai";
import { z } from "zod";

const { text, steps } = await generateText({
  model: openai("gpt-4o"),
  tools: {
    getWeather: tool({
      description: "查询指定城市的当前天气",
      parameters: z.object({
        city: z.string().describe("城市名，例如：北京、上海"),
      }),
      execute: async ({ city }) => {
        // 实际业务逻辑或第三方 API 调用
        return { city, temperature: 24, condition: "Sunny" };
      },
    }),
    computeExpression: tool({
      description: "执行高精度数学运算",
      parameters: z.object({
        expression: z.string().describe("数学算式，例如 '120 * 4.5'"),
      }),
      execute: async ({ expression }) => {
        return { result: eval(expression) };
      },
    }),
  },
  // 核心：允许大模型在一次请求内最多自主迭代 5 步
  maxSteps: 5,
  prompt: "先帮我查一下北京今天的天气，然后算一下 120 乘以 8 等于多少。",
});

console.log("Agent 最终综合答复:\n", text);
console.log(`总共自主经历了 ${steps.length} 轮工具决策交互。`);

import { streamText } from "ai";
import { openai } from "@ai-sdk/openai";

// 选用 Edge Runtime 获得更低冷启动延迟
export const runtime = "edge";

export async function POST(req: Request) {
  const { messages } = await req.json();

  const result = await streamText({
    model: openai("gpt-4o-mini"),
    system: "你是一名精通现代前端工程的虚拟助手。",
    messages,
  });

  // 转化为符合 Vercel AI 规范的 SSE 数据流响应
  return result.toDataStreamResponse();
}

import { openai } from "@ai-sdk/openai";
import { anthropic } from "@ai-sdk/anthropic";
import { google } from "@ai-sdk/google";

// 任意切换底层模型供应商
// const selectedModel = openai("gpt-4o");
// const selectedModel = anthropic("claude-3-5-sonnet-20241022");
const selectedModel = google("gemini-2.0-flash");

const { text } = await generateText({
  model: selectedModel,
  prompt: "对比 React 与 Vue 的响应式原理差异。",
});