/**
 * CliEntrypoint - Main air CLI entry
 * DD §17. Routes argv→command. All side effects through RuntimeApp.
 *
 * Usage: air <command> [args...]
 *
 * Commands (DD §17 table):
 *   run [project]    Start a session (spawns TUI)
 *   init             Initialize a new project
 *   doctor [--fix]   Run diagnostics
 *   provider <list|current>  Show provider config (read-only)
 *   resume [id]      Resume a session
 *   compact [tokens] Trigger context compaction
 *   history          Show session history
 *   session <list|inspect> Manage sessions
 *   restore --file|--time|--session  Restore state
 *   e2e              Run validation suite
 *   release          Release readiness check
 *
 * @module packages/cli
 */

export { initCommand } from './commands/init.js'
import { initCommand } from './commands/init.js'
import { doctorCommand } from './commands/doctor.js'
import { providerCommand } from './commands/provider.js'
import { resumeCommand } from './commands/resume.js'
import { compactCommand } from './commands/compact.js'
import { historyCommand } from './commands/history.js'
import { sessionCommand } from './commands/session.js'
import { restoreCommand } from './commands/restore.js'
import { e2eCommand } from './commands/e2e.js'
import { releaseCommand } from './commands/release.js'
import { askCommand } from './commands/ask.js'

export async function main(argv: string[]): Promise<void> {
  const args = argv.slice(2)
  const command = args[0]
  const rest = args.slice(1)

  switch (command) {
    case 'run': {
      const { runCommand } = await import('./commands/run.js')
      await runCommand(rest[0])
      break
    }

    case 'ask':
      await askCommand(rest.join(' '), {
        model: rest.find(a => a.startsWith('--model='))?.split('=')[1],
        maxTurns: rest.find(a => a.startsWith('--turns='))?.split('=')[1] ? parseInt(rest.find(a => a.startsWith('--turns='))!.split('=')[1]) : undefined
      })
      break

    case 'init':
      await initCommand(rest[0])
      break

    case 'doctor':
      await doctorCommand({
        fix: rest.includes('--fix'),
        bundle: rest.includes('--bundle'),
        scope: rest.find(a => a.startsWith('--scope='))?.split('=')[1]
      })
      break

    case 'provider':
      providerCommand(rest[0] || 'current')
      break

    case 'resume':
      resumeCommand(rest[0])
      break

    case 'compact':
      await compactCommand(rest[0] ? parseInt(rest[0]) : undefined)
      break

    case 'history':
      historyCommand()
      break

    case 'session':
      sessionCommand(rest[0] as 'list' | 'inspect', rest[1])
      break

    case 'restore':
      restoreCommand({
        file: rest.find(a => a.startsWith('--file='))?.split('=')[1],
        time: rest.find(a => a.startsWith('--time='))?.split('=')[1],
        session: rest.find(a => a.startsWith('--session='))?.split('=')[1]
      })
      break

    case 'e2e':
      e2eCommand()
      break

    case 'release':
    case 'release:check':
      releaseCommand()
      break

    case 'help':
    case '--help':
    case '-h':
    default:
      printHelp()
      break
  }
}

function printHelp(): void {
  console.log(`
AirCoding V1.0.0 Alpha

Usage: air <command> [args...]

Commands:
  ask "<prompt>"      Ask the AI to implement a task
  run [project]      Start a session (spawns TUI)
  init               Initialize a new AirCoding project
  doctor [--fix]     Run diagnostic checks
  provider list      List configured providers (read-only)
  provider current   Show current provider/model
  resume [id]        Resume a previous session
  compact [tokens]   Trigger context compaction
  history            Show session history
  session list       List active sessions
  session inspect <id> Inspect a session
  restore --file=<f>   Restore a file from git
  restore --time=<ISO> Restore to a point in time
  e2e                Run end-to-end validation
  release            Release readiness check
  help               Show this help

Environment:
  AIRCODING_PROJECT_ROOT  Default project path
  AIRCODING_PROVIDER      Default AI provider
  AIRCODING_MODEL         Default AI model
`)
}

// Run CLI if this is the main module
if (process.argv[1]?.includes('air') || process.argv[1]?.includes('cli')) {
  main(process.argv).catch((error) => {
    console.error('Fatal:', error)
    process.exit(1)
  })
}