#!/usr/bin/env bun

/**
 * Build script for Letta Code CLI
 * Bundles TypeScript source into a single JavaScript file
 */

import { readFileSync } from "node:fs";
import { join, dirname } from "node:path";
import { fileURLToPath } from "node:url";

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

// Read version from package.json
const pkg = JSON.parse(readFileSync(join(__dirname, "package.json"), "utf-8"));
const version = pkg.version;

console.log(`📦 Building Letta Code v${version}...`);

await Bun.build({
  entrypoints: ["./src/index.ts"],
  outdir: ".",
  target: "node",
  format: "esm",
  minify: false, // Keep readable for debugging
  sourcemap: "external",
  naming: {
    entry: "letta.js",
  },
  define: {
    "process.env.LETTA_VERSION": JSON.stringify(version),
  },
  // Load text files as strings (for markdown, etc.)
  loader: {
    ".md": "text",
    ".mdx": "text",
    ".txt": "text",
  },
});

// Add shebang to output file
const outputPath = join(__dirname, "letta.js");
let content = readFileSync(outputPath, "utf-8");

// Remove any existing shebang first
if (content.startsWith("#!")) {
  content = content.slice(content.indexOf("\n") + 1);
}

const withShebang = `#!/usr/bin/env node\n${content}`;
await Bun.write(outputPath, withShebang);

// Make executable
await Bun.$`chmod +x letta.js`;

console.log("✅ Build complete!");
console.log(`   Output: letta.js`);
console.log(`   Size: ${(await Bun.file(outputPath).size / 1024).toFixed(0)}KB`);