// Generates packaging/Payload.g.cs: the runtime plugin files embedded as C#
// base64 arrays so the installer is a single self-contained .exe.
//
// usage: node packaging/generate-payload.mjs <repoRoot> <outFile>
import fs from 'node:fs';
import path from 'node:path';

const root = path.resolve(process.argv[2] || '.');
const out = path.resolve(process.argv[3] || path.join(root, 'packaging', 'Payload.g.cs'));

// Only the bundle runtime files: sources, docs and dev tooling are not needed
// on an end user's machine.
const FILES = [
  'package.json',
  'cordis.patch.yml',
  'index.js',
  'client.js',
  'icon.svg',
  'locale/en.json',
  'locale/zh.json',
];

const manifest = JSON.parse(fs.readFileSync(path.join(root, 'package.json'), 'utf8'));
const chunks = [];
for (const relative of FILES) {
  const buffer = fs.readFileSync(path.join(root, relative));
  const base64 = buffer.toString('base64');
  const parts = [];
  for (let i = 0; i < base64.length; i += 4000) parts.push(base64.slice(i, i + 4000));
  chunks.push({ path: relative, parts });
}

const quote = (value) => JSON.stringify(value);

const lines = [];
lines.push('// <auto-generated> Generated by packaging/generate-payload.mjs — do not edit. </auto-generated>');
lines.push('namespace DshThemeInstaller {');
lines.push('  internal static class Payload {');
lines.push(`    internal const string BundleVersion = ${quote(manifest.version)};`);
lines.push(`    internal const string BundleName = ${quote(manifest.name)};`);
lines.push('    internal static readonly string[] Paths = new string[] {');
for (const chunk of chunks) lines.push(`      ${quote(chunk.path)},`);
lines.push('    };');
lines.push('    internal static readonly string[] Data = new string[] {');
for (const chunk of chunks) lines.push(`      ${chunk.parts.map((part) => quote(part)).join(' +\n      ')},`);
lines.push('    };');
lines.push('  }');
lines.push('}');
lines.push('');

fs.writeFileSync(out, lines.join('\n'));
const bytes = chunks.reduce((total, chunk) => total + chunk.parts.join('').length, 0);
console.log(`wrote ${out} (${FILES.length} files, ${(bytes / 1024).toFixed(1)} KiB base64 payload)`);