import { readFile } from 'fs/promises'
import { i18n } from '../i18n'
import { sdk } from '../sdk'
import { dataDir } from '../utils'

const { InputSpec, Value } = sdk

// Where to drop the uploaded PDF on the main volume. nacho (and any other
// daemon that mounts /data) can read it from this path.
const SUPPORT_PDF_PATH = `${dataDir}/support.pdf`

const inputSpec = InputSpec.of({
  // `required: true` so the form refuses to submit without a file selected —
  // works around the StartOS quirk where an empty file picker submits `{}`
  // (which Value.file's nullable parser rejects).
  pdf: Value.file({
    name: i18n('Workshop PDF'),
    description: i18n(
      'PDF to write to /data/support.pdf (overwrites any existing file).',
    ),
    warning: null,
    extensions: ['.pdf'],
    required: true,
  }),
})

export const uploadSupportPdf = sdk.Action.withInput(
  // id
  'upload-support-pdf',

  // metadata
  async ({ effects }) => ({
    name: i18n('Upload Support PDF'),
    description: i18n(
      'Upload a PDF that replaces /data/support.pdf on the main volume (overwrites if it exists). Used by nacho as the workshop PDF.',
    ),
    warning: null,
    allowedStatuses: 'any',
    group: null,
    visibility: 'enabled',
  }),

  // input
  inputSpec,

  // prefill — file pickers can't be prefilled
  async ({ effects }) => {},

  // run
  async ({ effects, input }) => {
    try {
      const pdfBuffer = await readFile(input.pdf.path)

      const res = await sdk.SubContainer.withTemp(
        effects,
        { imageId: 'spaces' },
        sdk.Mounts.of().mountVolume({
          volumeId: 'main',
          subpath: null,
          mountpoint: dataDir,
          readonly: false,
        }),
        'upload-support-pdf',
        (subc) =>
          subc.exec(
            [
              'sh',
              '-c',
              `cat > ${SUPPORT_PDF_PATH} && chmod 644 ${SUPPORT_PDF_PATH}`,
            ],
            { input: pdfBuffer, user: 'root' },
          ),
      )

      if (res.exitCode !== 0) {
        return {
          version: '1',
          title: i18n('Failure'),
          message: i18n('Could not write support PDF: ${error}', {
            error:
              ((res.stderr ?? '').toString() ||
                `exit ${res.exitCode}`).slice(0, 300),
          }),
          result: null,
        }
      }

      return {
        version: '1',
        title: i18n('Success'),
        message: i18n(
          'Workshop PDF written to /data/support.pdf (${size} bytes).',
          { size: String(input.pdf.commitment.size) },
        ),
        result: null,
      }
    } catch (e) {
      return {
        version: '1',
        title: i18n('Failure'),
        message: i18n('Could not write support PDF: ${error}', {
          error: (e as Error)?.message ?? String(e),
        }),
        result: null,
      }
    }
  },
)