// Build one release artifact for one target, on the matching host:
//   bun scripts/release.ts [--target mac-arm64|mac-x64|win-x64]
// Default target = the host. electrobun cannot cross-compile OSes (its
// packaging needs host tools: codesign/hdiutil on mac, rcedit/PowerShell on
// Windows), so win-x64 must run on a Windows machine. mac-x64 IS buildable on
// an arm64 Mac: we fetch electrobun's x64 CLI binary and run it under
// Rosetta 2 — it sees an x64 host, pulls the x64 core, and packages mac-x64.
// Artifacts land in release/<target>/miniSCP-Build<N>-<target>.<ext>.
import { cpSync, existsSync, mkdirSync, readdirSync } from "node:fs";
import os from "node:os";
import path from "node:path";
import { ensureSigned } from "./fix-electrobun-cli";

const ROOT = path.join(import.meta.dir, "..");
const TARGETS = ["mac-arm64", "mac-x64", "win-x64"] as const;
type Target = (typeof TARGETS)[number];

function hostTarget(): Target {
	if (process.platform === "win32") return "win-x64";
	return process.arch === "arm64" ? "mac-arm64" : "mac-x64";
}

function fail(message: string): never {
	console.error(`\n[release] ERROR: ${message}`);
	process.exit(1);
}

function run(cmd: string[], opts: { cwd?: string } = {}): void {
	console.log(`[release] $ ${cmd.join(" ")}`);
	const proc = Bun.spawnSync(cmd, {
		cwd: opts.cwd ?? ROOT,
		stdout: "inherit",
		stderr: "inherit",
	});
	if (!proc.success) fail(`command failed: ${cmd.join(" ")}`);
}

// ---- target selection + host guards ----

const argIndex = process.argv.indexOf("--target");
const requested = (argIndex >= 0 ? process.argv[argIndex + 1] : hostTarget()) as Target;
if (!TARGETS.includes(requested)) fail(`unknown target "${requested}" (${TARGETS.join(", ")})`);

if (requested === "win-x64" && process.platform !== "win32") {
	fail("win-x64 must be built on a Windows machine/runner — electrobun cannot cross-compile.");
}
if (requested.startsWith("mac") && process.platform !== "darwin") {
	fail(`${requested} must be built on macOS.`);
}
const viaRosetta = requested === "mac-x64" && process.arch === "arm64";

// ---- prepare: version, icons, UI bundle ----

run(["bun", "scripts/gen-version.ts"]);
run(["bun", "scripts/fix-electrobun-cli.ts"]);
run(["bun", "scripts/gen-icons.ts"]);
run(["bun", "run", "--cwd", "ui", "build"]);

const { BUILD } = await import("../src/shared/version.gen");
const { BRANDING } = await import("../src/shared/branding");
const buildName = `Build${BUILD.number}`;

// ---- electrobun build (native, or x64 CLI under Rosetta) ----

async function x64Cli(): Promise<string> {
	const pkg = await Bun.file(path.join(ROOT, "node_modules", "electrobun", "package.json")).json();
	const dir = path.join(os.homedir(), ".cache", "miniscp", `electrobun-cli-x64-${pkg.version}`);
	const bin = path.join(dir, "electrobun");
	// Same broken upstream ad-hoc signature as the arm64 CLI (see
	// scripts/fix-electrobun-cli.ts) — unsigned it is SIGKILLed on exec.
	if (existsSync(bin)) {
		if (!ensureSigned(bin)) fail(`x64 CLI at ${bin} has an unusable code signature`);
		return bin;
	}
	console.log(`[release] downloading electrobun x64 CLI ${pkg.version} (one-time)…`);
	mkdirSync(dir, { recursive: true });
	const url = `https://github.com/blackboardsh/electrobun/releases/download/v${pkg.version}/electrobun-cli-darwin-x64.tar.gz`;
	const tarball = path.join(dir, "cli.tar.gz");
	run(["curl", "-fsSL", "-o", tarball, url]);
	run(["tar", "-xzf", tarball, "-C", dir]);
	if (!existsSync(bin)) fail(`x64 CLI tarball did not contain "electrobun" (${dir})`);
	run(["chmod", "+x", bin]);
	if (!ensureSigned(bin)) fail(`x64 CLI at ${bin} has an unusable code signature`);
	return bin;
}

if (viaRosetta) {
	// x64 Mach-O runs under Rosetta transparently; it sees process.arch === x64
	const rosetta = Bun.spawnSync(["arch", "-x86_64", "true"]);
	if (!rosetta.success) {
		fail("Rosetta 2 is not installed — run: softwareupdate --install-rosetta --agree-to-license");
	}
	run([await x64Cli(), "build", "--env=stable"]);
} else {
	run(["bunx", "electrobun", "build", "--env=stable"]);
}

// ---- collect artifacts ----

const [osName, archName] = requested === "win-x64" ? ["win", "x64"] : ["macos", requested.slice(4)];
const prefix = `stable-${osName}-${archName}-`;
const artifactsDir = path.join(ROOT, "artifacts");
const outDir = path.join(ROOT, "release", requested);
mkdirSync(outDir, { recursive: true });

const produced = readdirSync(artifactsDir).filter(
	(f) => f.startsWith(prefix) && f.includes(BRANDING.appName),
);
if (!produced.length) fail(`no ${prefix}* artifacts found in artifacts/ — did the build run?`);

const out: string[] = [];
for (const file of produced) {
	const ext = file.endsWith(".dmg") ? ".dmg" : file.endsWith("-Setup.zip") ? "-Setup.zip" : null;
	if (!ext) continue; // skip the raw .app.tar.zst + update.json
	const name = `${BRANDING.appName}-${buildName}-${requested}${ext}`;
	cpSync(path.join(artifactsDir, file), path.join(outDir, name));
	out.push(name);
}

// Windows: also produce a portable zip from the assembled app folder (the
// Setup.exe is an installer; portable = unzip anywhere and run). Best-effort:
// the folder layout is confirmed by the first real Windows build.
if (requested === "win-x64") {
	const appDir = path.join(ROOT, "build", `stable-${osName}-${archName}`, BRANDING.appName);
	if (existsSync(appDir)) {
		const portable = path.join(outDir, `${BRANDING.appName}-${buildName}-win-x64-portable.zip`);
		run(["powershell", "-Command", `Compress-Archive -Force -Path '${appDir}\\*' -DestinationPath '${portable}'`]);
		out.push(path.basename(portable));
	} else {
		console.warn(`[release] WARN: portable skipped — app folder not found at ${appDir}`);
	}
}

if (!out.length) fail("artifacts were found but none matched a known package extension.");
console.log(`\n[release] ${BRANDING.appName} ${BRANDING.buildLabel} (${BUILD.commit}) — ${requested}`);
for (const name of out) console.log(`[release]   release/${requested}/${name}`);