#!/usr/bin/env node
// Build the embedded llmsproxy core(s) for the GUI package.
//   node prepare-core.js        -> linux (native, luajit) + win (cross, best effort)
//   node prepare-core.js linux  -> linux only
//   node prepare-core.js win    -> win only
const { execFileSync } = require("child_process");
const fs = require("fs");
const path = require("path");

const guiDir = __dirname.replace(/scripts$/, "");
const binDir = path.join(guiDir, "bin");
const projectRoot = path.join(guiDir, "..", "..");

function buildLinux() {
  const out = path.join(binDir, "llmsproxy");
  console.log("[prepare-core] building llmsproxy (linux/luajit)...");
  fs.mkdirSync(binDir, { recursive: true });
  execFileSync(
    "go",
    ["build", "-tags", "luajit", "-trimpath", "-o", out, "./cmd/llmsproxy"],
    { cwd: projectRoot, stdio: "inherit" },
  );
  return out;
}

function buildWin() {
  const out = path.join(binDir, "llmsproxy.exe");
  console.log(
    "[prepare-core] cross-building llmsproxy.exe (windows/amd64, luajit)...",
  );
  fs.mkdirSync(binDir, { recursive: true });
  const cc = process.env.MINGW_CC || "x86_64-w64-mingw32-gcc";
  // friendly hint when the mingw cross-compiler is missing
  try {
    execFileSync(cc + " --version", { shell: true, stdio: "ignore" });
  } catch (e) {
    console.error(
      "[prepare-core] MISSING mingw-w64 cross-compiler (" + cc + ").",
    );
    console.error("  Install it:  sudo apt install gcc-mingw-w64-x86-64");
    console.error("  Then re-run:  npm run core:win  (or make gui-win)");
    process.exit(1);
  }
  execFileSync(
    "go",
    ["build", "-tags", "luajit", "-trimpath", "-o", out, "./cmd/llmsproxy"],
    {
      cwd: projectRoot,
      stdio: "inherit",
      env: Object.assign({}, process.env, {
        GOOS: "windows",
        GOARCH: "amd64",
        CGO_ENABLED: "1",
        CC: cc,
      }),
    },
  );
  return out;
}

const which = process.argv[2] || "both";
const results = [];
try {
  if (which === "linux" || which === "both") results.push(buildLinux());
} catch (e) {
  console.error("[prepare-core] linux build failed:", e.message);
}
try {
  if (which === "win" || which === "both") results.push(buildWin());
} catch (e) {
  console.error("[prepare-core] win build failed:", e.message);
}
if (results.length === 0) process.exit(1);
results.forEach((p) => console.log("[prepare-core] core ready: " + p));