Error Handling & Fallback

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://gateway.corevalue.dev/v1",
  apiKey: process.env.COVA_API_KEY,
});

async function callWithRetry(maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      const response = await client.chat.completions.create({
        model: "gpt-4o-mini",
        messages: [{ role: "user", content: "Hello!" }],
      });
      return response;
    } catch (error: any) {
      const status = error?.status || 500;

      // Don't retry auth errors or bad requests
      if (status === 401 || status === 403 || status === 400) {
        throw error;
      }

      // Don't retry insufficient credits unless it's the last attempt
      if (status === 429 && i === maxRetries - 1) {
        throw error;
      }

      // Retry transient errors (500, 503) with exponential backoff
      if (status >= 500 || status === 429) {
        await new Promise(resolve => setTimeout(resolve, Math.pow(2, i) * 1000));
        continue;
      }

      throw error;
    }
  }
}

function classifyError(error: any) {
  const status = error?.status || 500;

  if (status === 401) {
    return {
      type: "authentication",
      action: "Check your API keys in settings",
      retryable: false
    };
  }

  if (status === 429) {
    return {
      type: "rate_limit",
      action: "Add credits or wait before retrying",
      retryable: true
    };
  }

  if (status >= 500) {
    return {
      type: "server_error",
      action: "Retry with exponential backoff",
      retryable: true
    };
  }

  return {
    type: "unknown",
    action: "Check error message for details",
    retryable: false
  };
}