/** Prepare the target Electron distribution and pinned pnpm CLI. */

import { execFileSync } from 'node:child_process'
import { chmodSync, cpSync, mkdirSync, readFileSync, rmSync, writeFileSync } from 'node:fs'
import { createRequire } from 'node:module'
import { dirname, join } from 'node:path'
import { downloadArtifact } from '@electron/get'
import extractZip from 'extract-zip'
import { resolveDesktopBuildTarget, resolveDesktopTargetBuildPaths } from './desktop-build-paths.mjs'
import { preparePrimaryRuntime } from './prepare-primary-runtime.ts'

const BUILD_PATHS = resolveDesktopTargetBuildPaths()
const RUNTIME_ROOT = BUILD_PATHS.runtime

function preparePnpm(): string {
  const require = createRequire(import.meta.url)
  const manifestPath = require.resolve('pnpm')
  const manifest = JSON.parse(readFileSync(manifestPath, 'utf8')) as { version?: unknown }
  if (typeof manifest.version !== 'string') throw new Error('desktop runtime: pnpm manifest has no version')
  const packageDir = dirname(manifestPath)
  const destination = join(RUNTIME_ROOT, 'pnpm')
  rmSync(destination, { recursive: true, force: true })
  cpSync(packageDir, destination, { recursive: true })
  return manifest.version
}

async function main(): Promise<void> {
  const target = resolveDesktopBuildTarget()
  const platform = target.startsWith('mac-') ? 'darwin' : 'win32'
  const arch = target.endsWith('arm64') ? 'arm64' : 'x64'
  const require = createRequire(import.meta.url)
  const { version } = require('electron/package.json') as { version: string }
  const archive = await downloadArtifact({ version, platform, arch, artifactName: 'electron', cacheRoot: BUILD_PATHS.downloads })
  rmSync(BUILD_PATHS.electron, { recursive: true, force: true })
  await extractZip(archive, { dir: BUILD_PATHS.electron })
  const executable = join(BUILD_PATHS.electron, platform === 'win32' ? 'electron.exe' : 'Electron.app/Contents/MacOS/Electron')
  const nodeVersion = execFileSync(executable, ['-p', 'process.versions.node'], {
    encoding: 'utf8', env: { ...process.env, ELECTRON_RUN_AS_NODE: '1' },
  }).trim()
  rmSync(RUNTIME_ROOT, { recursive: true, force: true })
  mkdirSync(RUNTIME_ROOT, { recursive: true })
  const pnpmVersion = preparePnpm()
  cpSync(join(import.meta.dirname, 'node-bin'), join(RUNTIME_ROOT, 'bin'), { recursive: true })
  chmodSync(join(RUNTIME_ROOT, 'bin', 'node'), 0o755)
  writeFileSync(join(RUNTIME_ROOT, 'versions.json'), `${JSON.stringify({
    schemaVersion: 1,
    node: nodeVersion,
    pnpm: pnpmVersion,
  }, undefined, 2)}\n`)
  await preparePrimaryRuntime()
}

await main()