#!/usr/bin/env node
// ableton-template.mjs — install the stripped "AC Blank" Set into each fleet Mac's Live browser.
//
//   node ableton-template.mjs                 # build + install as a browser template
//   node ableton-template.mjs blueberry       # just blueberry
//   node ableton-template.mjs --default       # ALSO make it the Set that ⌘N opens
//   node ableton-template.mjs --name "AC Blank"
//
// The Set itself is generated by reference/ableton/als-template.mjs — one audio track and the Main
// out, no MIDI tracks, no returns.
//
// TWO PLACES, TWO MEANINGS:
//
//   ~/Music/Ableton/User Library/Templates/<name>.als
//     What Live's browser lists under Templates. One click to a blank Set. Always installed.
//
//   ~/Library/Preferences/Ableton/Live <ver>/BaseFiles/DefaultLiveSet.als     (--default)
//     The Set `New Live Set` (⌘N) opens. The FILENAME is the whole trick — `DefaultLiveSet.als`,
//     which is the string the Live binary carries. Copies named anything else (Template.als, the
//     Set's own name) are ignored no matter where you put them, which is what made this so slippery.
//     Only overwritten with --default, and the previous default is backed up first, because a Mac
//     may already have a hand-made default worth keeping (neo did).
//
// UNVERIFIED. The filename was found by spotting an existing DefaultLiveSet.als on neo; installing
// one has not yet been confirmed to change ⌘N across a Live restart. Launch Live and press ⌘N once
// to check. See reference/ableton/TEMPLATE.md.
import { execFile } from "node:child_process";
import { promisify } from "node:util";
import { readFile } from "node:fs/promises";
import { fileURLToPath } from "node:url";
import { dirname, join } from "node:path";
const run = promisify(execFile);

const HERE = dirname(fileURLToPath(import.meta.url));
const GEN = join(HERE, "..", "..", "..", "reference", "ableton", "als-template.mjs");
const HOSTS = ["neo", "blueberry"];

const argv = process.argv.slice(2);
const opt = (n, d) => (argv.includes(n) ? argv[argv.indexOf(n) + 1] : d);
const name = opt("--name", "AC Blank");
const positional = argv.filter((a, i) => !a.startsWith("--") && argv[i - 1] !== "--name");
const hosts = positional.length ? positional : HOSTS;

// Build the Set fresh so the installed template always matches the generator in git.
const built = join(HERE, "..", "..", "..", "reference", "ableton", "AC-Blank.als");
await run("node", [GEN, "--out", built]);
const als = await readFile(built);
console.log(`built ${name}.als (${als.length} bytes)`);

const asDefault = argv.includes("--default");
const b64 = als.toString("base64");

for (const host of hosts) {
  try {
    const tpl = "$HOME/Music/Ableton/User Library/Templates";
    await run("ssh", [
      "-o", "ConnectTimeout=8", host,
      `mkdir -p "${tpl}" && printf %s '${b64}' | base64 -d > "${tpl}/${name}.als"`,
    ], { maxBuffer: 1 << 24 });
    console.log(`  ✓ ${host}: User Library/Templates/${name}.als`);

    if (asDefault) {
      // Live's settings folder is versioned; target the newest one it has actually run.
      const { stdout: ver } = await run("ssh", [
        "-o", "ConnectTimeout=8", host,
        `ls "$HOME/Library/Preferences/Ableton" | grep '^Live ' | sort -V | tail -1`,
      ]);
      const v = ver.trim();
      if (!v) throw new Error("no Live settings folder");
      const base = `$HOME/Library/Preferences/Ableton/${v}/BaseFiles`;
      const f = `${base}/DefaultLiveSet.als`;
      await run("ssh", [
        "-o", "ConnectTimeout=8", host,
        `mkdir -p "${base}"; ` +
          `[ -f "${f}" ] && cp "${f}" "${f}.bak-$(date +%Y%m%d-%H%M%S)" && echo "  (backed up the existing default)"; ` +
          `printf %s '${b64}' | base64 -d > "${f}"`,
      ], { maxBuffer: 1 << 24 });
      console.log(`  ✓ ${host}: ${v}/BaseFiles/DefaultLiveSet.als — ⌘N should now open it`);
    }
  } catch (err) {
    console.log(`  ✗ ${host}: ${err.message.split("\n")[0]}`);
  }
}

console.log(`\nIn Live: browser > Templates > "${name}".`);
if (asDefault) {
  console.log("Launch Live and press ⌘N to confirm the default took — this path is unverified.");
} else {
  console.log("⌘N still opens Ableton's stock Set. Pass --default to change that.");
}