/**
 * RestoreCommand - Restore project state (git-backed)
 * DD §17. Git-backed file/time/session granularity.
 */
import { execFileSync } from 'child_process'

export function restoreCommand(options: { file?: string; time?: string; session?: string }): void {
  if (options.file) {
    console.log(`Restoring file: ${options.file}`)
    try {
      execFileSync('git', ['checkout', '--', options.file], { cwd: process.cwd(), stdio: 'pipe' })
      console.log('  File restored from git.')
    } catch {
      console.log('  git checkout failed. Is this a git repository?')
    }
  } else if (options.time) {
    console.log(`Restoring to time: ${options.time}`)
    try {
      execFileSync('git', ['log', '--before', options.time, '--max-count=1', '--format=%H'], { cwd: process.cwd(), stdio: 'pipe' })
      console.log('  Use "git checkout <hash>" to restore to that point.')
    } catch {
      console.log('  Unable to find commits before that time.')
    }
  } else if (options.session) {
    console.log(`Restoring session: ${options.session}`)
    console.log(`  Session state lives in .air/local/sessions/${options.session}/`)
    console.log('  To restore, resume the session with: air resume ' + options.session)
  } else {
    console.log('Usage: air restore --file <path> | --time <ISO> | --session <id>')
  }
}