import { spawn, ChildProcess, exec } from "child_process";
import path from "path";
import fs from "fs";

const rootDir = __dirname;
const exocoreWebDir = path.join(rootDir, "exocore-web");

process.env.FORCE_COLOR = "3";

const ANSI = {
  cyan: (s: string) => `\x1b[96m${s}\x1b[0m`,
  yellow: (s: string) => `\x1b[93m${s}\x1b[0m`,
  red: (s: string) => `\x1b[91m${s}\x1b[0m`,
  green: (s: string) => `\x1b[92m${s}\x1b[0m`,
  bold: (s: string) => `\x1b[1m${s}\x1b[0m`,
};

const log = {
  info: (msg: string) => console.log(ANSI.cyan("[INFO]"), msg),
  warn: (msg: string) => console.log(ANSI.yellow("[WARN]"), msg),
  error: (msg: string) => console.log(ANSI.red("[ERROR]"), msg),
  success: (msg: string) => console.log(ANSI.green("[SUCCESS]"), msg),
};

function printLogo(): void {
  const lines = [
    "  ███████╗██╗  ██╗ ██████╗  ██████╗ ██████╗ ██████╗ ███████╗",
    "  ██╔════╝╚██╗██╔╝██╔═══██╗██╔════╝██╔═══██╗██╔══██╗██╔════╝",
    "  █████╗   ╚███╔╝ ██║   ██║██║     ██║   ██║██████╔╝█████╗  ",
    "  ██╔══╝   ██╔██╗ ██║   ██║██║     ██║   ██║██╔══██╗██╔══╝  ",
    "  ███████╗██╔╝ ██╗╚██████╔╝╚██████╗╚██████╔╝██║  ██║███████╗",
    "  ╚══════╝╚═╝  ╚═╝ ╚═════╝  ╚═════╝ ╚═════╝ ╚═╝  ╚═╝╚══════╝",
  ];
  const colors = ["\x1b[96m", "\x1b[96m", "\x1b[36m", "\x1b[36m", "\x1b[32m", "\x1b[32m"];
  console.log("");
  lines.forEach((line, i) => console.log(`${colors[i]}${line}\x1b[0m`));
  console.log("");
  console.log(ANSI.bold(ANSI.green("  ⚡ EXOCORE 2026 — Full System Architecture")));
  console.log("");
}

interface BinResult {
  cmd: string;
  args: string[];
}

function resolveBin(name: string): BinResult {
  const rootBin = path.join(rootDir, "node_modules", ".bin", name);
  const webBin = path.join(exocoreWebDir, "node_modules", ".bin", name);
  if (fs.existsSync(rootBin)) return { cmd: rootBin, args: [] };
  if (fs.existsSync(webBin)) return { cmd: webBin, args: [] };
  return { cmd: "npx", args: [name] };
}

function runProcess(name: string, command: string, args: string[], options: any = {}): ChildProcess {
  const mergedOptions = { stdio: "inherit" as const, shell: false, ...options };
  log.info(`[START] ${name}: ${command} ${args.join(" ")}`);
  return spawn(command, args, mergedOptions);
}

function waitForProcess(child: ChildProcess): Promise<void> {
  return new Promise((resolve, reject) => {
    child.on("exit", (code) => {
      if (code === 0) resolve();
      else reject(new Error(`Failed with exit code ${code}`));
    });
    child.on("error", (err) => reject(err));
  });
}

function freePort(port: number): Promise<void> {
  return new Promise((resolve) => {
    exec(`fuser -k ${port}/tcp 2>/dev/null || true`, () => {
      setTimeout(resolve, 500);
    });
  });
}

async function runTypeCheck(): Promise<void> {
  const tsc = resolveBin("tsc");

  log.warn("Running standard TypeScript check...");
  const serverCheck = runProcess("TypeCheck", tsc.cmd, [
    ...tsc.args,
    "-p", path.join(exocoreWebDir, "tsconfig.server.json"),
                                 "--noEmit"
  ], { cwd: exocoreWebDir });

  await waitForProcess(serverCheck);
  log.success("TypeScript check passed!");
}

async function runViteBuild(): Promise<void> {
  const vite = resolveBin("vite");

  log.warn("Building web assets with Vite...");
  const buildProcess = runProcess("ViteBuild", vite.cmd, [
    ...vite.args,
    "build"
  ], { cwd: exocoreWebDir });

  await waitForProcess(buildProcess);
  log.success("Vite build successful!");
}

async function startServer(): Promise<ChildProcess> {
  log.info("Launching Exocore server...");
  const tsx = resolveBin("tsx");
  return runProcess("Server", tsx.cmd, [...tsx.args, "index.ts"], {
    cwd: exocoreWebDir,
  });
}

async function main(): Promise<void> {
  try {
    printLogo();

    const port = process.env.PORT ? parseInt(process.env.PORT) : 5000;
    log.info(`Clearing network port ${port}...`);
    await freePort(port);
    await runTypeCheck();
    await runViteBuild();
    const server = await startServer();
    process.on("SIGINT", () => {
      console.log("");
      log.warn("System shutdown requested.");
      server.kill();
      process.exit(0);
    });

  } catch (err) {
    const error = err instanceof Error ? err : new Error(String(err));
    console.log("");
    log.error("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
    log.error(`STARTUP FAILED: ${error.message}`);
    log.error("Please resolve the build errors above to continue.");
    log.error("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
    process.exit(1);
  }
}

main();