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

// Config: Replace with your actual project details
const vertex = createVertex({
  project: process.env.GOOGLE_CLOUD_PROJECT,
  location: process.env.GOOGLE_CLOUD_LOCATION || "us-central1",
});
const model = vertex("gemini-3-flash-preview");

async function reproduceIssue() {
  console.log("--- Initializing Reproduction for Namespace Desync ---");

  /**
   * STEP 1: Scenario Simulation
   * We simulate a message history where Step 1 was already completed.
   * Following the standard Google AI provider convention, the thoughtSignature
   * is provided back in the 'google' namespace.
   */
  const messages = [
    { role: "user", content: "What is the weather in London?" },
    {
      role: "assistant",
      content: [
        {
          type: "text",
          text: "",
        },
        {
          type: "tool-call",
          toolCallId: "call_123",
          toolName: "getWeather",
          input: { location: "London" },
          providerOptions: {
            google: { thoughtSignature: step1Signature },
          },
        },
      ],
    },
    {
      role: "tool",
      content: [
        {
          type: "tool-result",
          toolCallId: "call_123",
          toolName: "getWeather",
          output: {
            type: "json",
            value: { temperature: 15, unit: "celsius" },
          },
        },
      ],
    },
  ];

  try {
    /**
     * STEP 2: The Follow-up
     * This execution will trigger convertToGoogleGenerativeAIMessages.
     * * Due to the bug in google-generative-ai-language-model.ts (L100-L115),
     * the providerOptionsName remains 'vertex', failing to find 'google.thoughtSignature'.
     */
    const result = await generateText({
      model,
      tools: {
        getWeather: tool({
          description: "Get the weather",
          inputSchema: z.object({ location: z.string() }),
        }),
      },
      messages: messages as any,
    });

    console.log("Response:", result.text);
  } catch (error: any) {
    console.error("❌ Reproduction Error caught:");
    console.error(error.message);
  }
}

reproduceIssue();