import { spawn } from "child_process";

async function test() {
  console.log("Starting backend server...");
  const backend = spawn("bun", ["src/index.ts"], {
    cwd: "../backend",
    env: { ...process.env, PORT: "3051" }
  });

  // Give backend 2 seconds to start
  await new Promise(resolve => setTimeout(resolve, 2000));

  console.log("Starting MCP server...");
  const mcp = spawn("bun", ["index.ts"], {
    cwd: ".",
    env: { ...process.env, MCP_BACKEND_URL: "http://localhost:3051/api" }
  });

  mcp.stderr.on("data", (data) => {
    console.error(`[MCP STDERR] ${data}`);
  });

  let responseData = "";
  mcp.stdout.on("data", (data) => {
    responseData += data.toString();
    console.log(`[MCP STDOUT] ${data}`);
  });

  const send = (msg: any) => {
    mcp.stdin.write(JSON.stringify(msg) + "\n");
  };

  // 1. Send initialize
  console.log("Sending initialize request...");
  send({
    jsonrpc: "2.0",
    id: 1,
    method: "initialize",
    params: {
      protocolVersion: "2024-11-05",
      capabilities: {},
      clientInfo: { name: "test-client", version: "1.0.0" }
    }
  });

  await new Promise(resolve => setTimeout(resolve, 1000));

  // 2. Send initialized notification
  console.log("Sending initialized notification...");
  send({
    jsonrpc: "2.0",
    method: "notifications/initialized"
  });

  await new Promise(resolve => setTimeout(resolve, 1000));

  // 3. Send callTool request to update_category_image
  console.log("Sending callTool request for update_category_image...");
  responseData = ""; // Clear response data
  send({
    jsonrpc: "2.0",
    id: 2,
    method: "tools/call",
    params: {
      name: "update_category_image",
      arguments: {
        id: 1,
        imageUrl: "https://example.com/mcp-test.png"
      }
    }
  });

  await new Promise(resolve => setTimeout(resolve, 3000));

  console.log("Cleaning up servers...");
  mcp.kill();
  backend.kill();

  console.log("Verifying response...");
  console.log("Full responseData:", responseData);
  if (!responseData.includes("https://example.com/mcp-test.png")) {
    throw new Error("MCP response did not contain the updated imageUrl!");
  }

  console.log("MCP tool test passed successfully!");
}

test().catch(err => {
  console.error("Test failed:", err);
  process.exit(1);
});