/** Boot the materialized target runtime without access to a user's Harness profile. */

import { mkdirSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { join } from 'node:path'
import { DesktopHostProcess } from '../src/host-process.ts'
import { createPluginProfile } from '../src/project-manager.ts'
import { linkDesktopHostPackages, validateDesktopPluginGraph } from '../src/profile-packages.ts'
import type { DesktopRuntimeDescriptor } from '../src/runtime-tree.ts'

/**
 * Prove the final resource tree boots and serves its matching Web frontend.
 * @param root - Materialized dsh resources.
 * @param node - Prepared target Node executable.
 * @param runtime - Verified resource descriptor.
 */
export async function smokeDesktopRuntime(root: string, node: string, runtime: DesktopRuntimeDescriptor): Promise<void> {
  const home = mkdtempSync(join(tmpdir(), 'dsh-desktop-smoke-'))
  const profile = join(home, 'profiles', 'desktop')
  const host = new DesktopHostProcess(node, root, profile, undefined, { ...process.env, DSH_HOME: home })
  try {
    createPluginProfile(profile)
    const pluginName = 'desktop-runtime-smoke-plugin'
    const plugin = join(profile, 'node_modules', pluginName)
    mkdirSync(plugin, { recursive: true })
    const cordis = runtime.sharedPackages.find(entry => entry.name === '@deepseek-ai/cordis')
    if (cordis === undefined) throw new Error('desktop runtime: missing shared Cordis package')
    writeFileSync(join(plugin, 'package.json'), JSON.stringify({
      name: pluginName, version: '1.0.0', type: 'module', exports: './index.js',
      peerDependencies: { '@deepseek-ai/cordis': cordis.version }, dsh: { bundle: { patch: './bundle.yml' } },
    }))
    writeFileSync(join(plugin, 'index.js'), `
import { Context } from '@deepseek-ai/cordis'
export function apply(ctx) {
  if (!(ctx instanceof Context)) throw new Error('desktop runtime: external plugin loaded another Cordis instance')
}
`)
    writeFileSync(join(plugin, 'bundle.yml'), '- insert:\n    - id: desktop-runtime-smoke-plugin\n      name: desktop-runtime-smoke-plugin\n')
    const manifest = JSON.parse(readFileSync(join(profile, 'package.json'), 'utf8')) as {
      dependencies: Record<string, string>
      dsh: { profile: { bundles: string[] } }
    }
    manifest.dependencies[pluginName] = '1.0.0'
    manifest.dsh.profile.bundles.push(pluginName)
    writeFileSync(join(profile, 'package.json'), JSON.stringify(manifest))
    linkDesktopHostPackages(profile, root, runtime)
    validateDesktopPluginGraph(profile, root, runtime, [pluginName])
    const ready = await host.start()
    if (ready.dshVersion !== runtime.release.version) throw new Error('desktop runtime: Host reported another dsh release')
    const response = await host.fetch(new Request('dsh-app://app/'))
    if (response.status !== 200 || !(await response.text()).includes('<html')) {
      throw new Error('desktop runtime: packaged frontend smoke failed')
    }
  } finally {
    await host.stop()
    rmSync(home, { recursive: true, force: true })
  }
}