#!/usr/bin/env node
/**
 * Bundles the compiled CLI entry (dist/cli.js) into dist/bundle/ with esbuild.
 *
 * Why: the unbundled module graph is ~2,500 files; resolving and reading them
 * dominates startup (~1.5s on slow filesystems). The bundle loads the same code
 * from ~20 chunk files in under half the time. dist/ stays unbundled for
 * library consumers and type resolution; only the bin entry uses the bundle.
 *
 * Extension loading inside the bundle uses jiti virtualModules (same as the
 * compiled Bun binary), keyed off the __PI_BUNDLED__ define below, so extension
 * imports of pi packages share the bundle's module instances.
 */
import { chmodSync, readFileSync, rmSync } from "node:fs";
import { execFileSync } from "node:child_process";
import { dirname, join, resolve } from "node:path";
import { fileURLToPath } from "node:url";
import { build } from "esbuild";

const packageDir = dirname(dirname(fileURLToPath(import.meta.url)));
const outdir = join(packageDir, "dist", "bundle");
let buildId;
try {
	buildId = execFileSync("git", ["describe", "--tags", "--always", "--dirty"], {
		cwd: dirname(packageDir),
		encoding: "utf8",
	}).trim();
} catch {
	buildId = `release-${JSON.parse(readFileSync(join(packageDir, "package.json"), "utf8")).version}`;
}

rmSync(outdir, { recursive: true, force: true });

const result = await build({
	entryPoints: {
		cli: join(packageDir, "dist", "cli.js"),
		// The Node-only lazy loader uses a variable import that esbuild cannot discover.
		"amazon-bedrock": join(packageDir, "dist", "node", "amazon-bedrock.js"),
	},
	outdir,
	bundle: true,
	metafile: true,
	splitting: true,
	format: "esm",
	platform: "node",
	// Native or interop-sensitive packages stay external; they resolve from
	// node_modules at runtime (and are loaded via createRequire/lazily anyway).
	external: [
		"koffi",
		"undici",
		"@silvia-odwyer/photon-node",
		"@mariozechner/clipboard",
		// Preserve Node's CommonJS interop for the AWS SDK's lazy transport imports.
		"@earendil-works/pi-ai/bedrock-provider",
	],
	define: { __PI_BUNDLED__: "true", __PI_BUILD_ID__: JSON.stringify(buildId) },
	banner: {
		js: "import { createRequire as __piBundleCreateRequire } from 'node:module'; const require = __piBundleCreateRequire(import.meta.url);",
	},
	logLevel: "warning",
});

const bedrockOutput = Object.entries(result.metafile.outputs).find(
	([path]) => resolve(path) === join(outdir, "amazon-bedrock.js"),
)?.[1];
for (const name of ["streamBedrock", "streamSimpleBedrock"]) {
	if (!bedrockOutput?.exports.includes(name)) {
		throw new Error(`Bedrock bundle is missing the ${name} export`);
	}
}

chmodSync(join(outdir, "cli.js"), 0o755);
console.log("bundled dist/cli.js -> dist/bundle/");