import { Router } from "express";

const router = Router();
const ANTHROPIC_API_URL = "https://api.anthropic.com";

// Express 5 uses named parameters for wildcards
router.post("/*path", async (req, res) => {
  const apiKey = process.env.ANTHROPIC_API_KEY;

  if (!apiKey) {
    return res.status(500).json({ error: "API key not configured" });
  }

  // Get the path after /api/claude (e.g., /v1/messages)
  // Express 5 returns path segments as an array
  const pathParam = req.params.path;
  const path = "/" + (Array.isArray(pathParam) ? pathParam.join("/") : pathParam || "");

  try {
    const response = await fetch(`${ANTHROPIC_API_URL}${path}`, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        "x-api-key": apiKey,
        "anthropic-version": "2023-06-01",
      },
      body: JSON.stringify(req.body),
    });

    const data = await response.json();
    res.status(response.status).json(data);
  } catch (error) {
    console.error("Claude API error:", error.message);
    res.status(500).json({ error: "Failed to proxy request to Claude API" });
  }
});

export default router;