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import { MeshAPI, MeshAPIApiError } from "meshapi-node-sdk";
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try {
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  const response = await client.chat.completions.create({
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    model: "openai/gpt-4o-mini",
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    messages: [{ role: "user", content: "Hello" }],
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  });
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  console.log(response.choices[0]?.message.content);
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} catch (err) {
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  if (err instanceof MeshAPIApiError) {
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    console.error(`[${err.status}] ${err.errorCode}: ${err.message}`);
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    console.error("Request ID:", err.requestId);
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    switch (err.errorCode) {
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      case "rate_limit_exceeded":
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        console.log(`Retry after ${err.retryAfterSeconds}s`);
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        break;
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      case "spend_limit_exceeded":
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        console.log("Spend cap reached — add credits.");
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        break;
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      case "unauthorized":
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        console.log("Invalid or missing API key.");
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        break;
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      case "model_not_found":
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        console.log("Model not supported by the gateway.");
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        break;
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      case "upstream_error":
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        console.log("Upstream provider error:", err.providerError);
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        break;
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      case "validation_error":
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        console.log("Validation details:", err.details);
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        break;
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    }
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  } else {
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    // Network error, AbortError, etc.
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    throw err;
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  }
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}

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try {
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  for await (const chunk of stream) {
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    process.stdout.write(chunk.choices[0]?.delta.content ?? "");
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  }
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} catch (err) {
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  if (err instanceof MeshAPIApiError) {
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    // e.g. errorCode: "upstream_error", status: 0 (headers already sent)
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    console.error("Stream error:", err.errorCode, err.message);
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  }
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}