#!/usr/bin/env node

/**
 * Server Starter for KHY Admin Dashboard
 *
 * This script starts a local server and opens the preview pages
 * Usage: node start-server.js
 */

const { spawn } = require("child_process");
const { exec } = require("child_process");
const path = require("path");
const fs = require("fs");

const PORT = 8080;
const BASE_URL = `http://localhost:${PORT}`;
const PID_FILE = path.join(__dirname, ".server.pid");

console.log("Starting KHY Admin Preview Server");
console.log("===================================");
console.log("");

// Function to open URL in default browser
function openBrowser(url) {
  const start =
    process.platform === "darwin"
      ? "open"
      : process.platform === "win32"
      ? "start"
      : "xdg-open";

  exec(`${start} ${url}`, (error) => {
    if (error) {
      console.log(`Please manually open: ${url}`);
    }
  });
}

// Function to save server PID
function saveServerPID(pid) {
  try {
    fs.writeFileSync(PID_FILE, pid.toString());
    console.log(`Server PID saved: ${pid}`);
  } catch (error) {
    console.log(`Could not save PID: ${error.message}`);
  }
}

// Function to kill server by PID
function killServerByPID() {
  try {
    if (fs.existsSync(PID_FILE)) {
      const pid = fs.readFileSync(PID_FILE, "utf8").trim();
      console.log(`Killing server with PID: ${pid}`);

      // Kill the process
      process.kill(parseInt(pid), "SIGTERM");

      // Remove PID file
      fs.unlinkSync(PID_FILE);
      console.log(`Server killed successfully`);
      return true;
    }
  } catch (error) {
    console.log(`Could not kill server: ${error.message}`);
  }
  return false;
}

// Function to start the server
function startServer() {
  console.log(`Starting server on port ${PORT}...`);

  // Try Python first, then Node.js http-server
  const pythonServer = spawn(
    "python3",
    ["-m", "http.server", PORT.toString()],
    {
      stdio: "pipe",
      cwd: __dirname,
    }
  );

  // Save the server PID
  saveServerPID(pythonServer.pid);

  pythonServer.stdout.on("data", (data) => {
    console.log(`Server output: ${data}`);
  });

  pythonServer.stderr.on("data", (data) => {
    console.log(`Server error: ${data}`);
  });

  pythonServer.on("close", (code) => {
    console.log(`Server stopped with code ${code}`);
    // Clean up PID file when server stops
    if (fs.existsSync(PID_FILE)) {
      fs.unlinkSync(PID_FILE);
    }
  });

  // Wait a moment for server to start
  setTimeout(() => {
    console.log("");
    console.log("Server started successfully!");
    console.log("");
    console.log("Preview URLs:");
    console.log(`   Admin Dashboard: ${BASE_URL}/admin.html`);
    console.log(`   Homepage:        ${BASE_URL}/index.html`);
    console.log(`   Product Catalog: ${BASE_URL}/product-catalog.html`);
    console.log(`   Product Details: ${BASE_URL}/product-detail.html`);
    console.log("");
    console.log("Opening preview pages...");

    // Open preview pages
    setTimeout(() => openBrowser(`${BASE_URL}/admin.html`), 1000);
    setTimeout(() => openBrowser(`${BASE_URL}/index.html`), 2000);
    setTimeout(() => openBrowser(`${BASE_URL}/product-catalog.html`), 3000);

    console.log("");
    console.log("Preview environment ready!");
    console.log("Press Ctrl+C to stop the server");
    console.log("");
  }, 2000);

  // Handle Ctrl+C
  process.on("SIGINT", () => {
    console.log("");
    console.log("Stopping server...");
    pythonServer.kill();
    process.exit(0);
  });
}

// Check if port is already in use
const net = require("net");
const server = net.createServer();

server.listen(PORT, () => {
  server.close(() => {
    startServer();
  });
});

server.on("error", (err) => {
  if (err.code === "EADDRINUSE") {
    console.log(`Port ${PORT} is already in use`);
    console.log("The server might already be running");
    console.log("");
    console.log("If server is running, you can access:");
    console.log(`   Admin Dashboard: ${BASE_URL}/admin.html`);
    console.log(`   Homepage:        ${BASE_URL}/index.html`);
    console.log(`   Product Catalog: ${BASE_URL}/product-catalog.html`);
    console.log(`   Product Details: ${BASE_URL}/product-detail.html`);
    console.log("");
    console.log("Opening preview pages...");

    // Open preview pages anyway
    setTimeout(() => openBrowser(`${BASE_URL}/admin.html`), 1000);
    setTimeout(() => openBrowser(`${BASE_URL}/index.html`), 2000);
    setTimeout(() => openBrowser(`${BASE_URL}/product-catalog.html`), 3000);
  } else {
    console.error("Error starting server:", err.message);
    process.exit(1);
  }
});