import type { ScreenMode, ScreenPlan } from '../src/types/screen.js'
import { integer, object, text } from './remote-state.js'

const modes = [
  'UNSPECIFIED',
  'COVER',
  'INTRO',
  'INTRO_DONE',
  'CONCLUSION',
  'CONCLUSION_DONE',
  'RESULTS',
  'TIMER',
  'TEXT',
]

export function parsePlan(value: unknown): ScreenPlan {
  const plan = value == null ? {} : object(value)
  const list = plan.steps ?? []
  if (!Array.isArray(list)) throw new Error('Некорректные шаги плана')
  const steps = list.map((value) => {
    const step = object(value)
    const mode = integer(
      typeof step.mode === 'string' && step.mode.startsWith('SCREEN_MODE_')
        ? modes.indexOf(step.mode.slice(12))
        : step.mode,
      1,
      8,
    ) as ScreenMode
    const content = text(step.text ?? '').trim()
    const label = text(step.timerLabel ?? '').trim()
    const seconds = integer(step.timerDurationSeconds ?? 0, 0, 86400)
    if (mode === 8 && (!content || Buffer.byteLength(content) > 10000))
      throw new Error('Текст шага должен содержать от 1 до 10000 байт')
    if (mode === 7 && (!seconds || Buffer.byteLength(label) > 200))
      throw new Error('Укажите таймер от 1 до 86400 секунд и подпись до 200 байт')
    return {
      mode,
      text: content,
      timerLabel: mode === 7 ? label || 'Перерыв' : label,
      timerDurationSeconds: seconds,
    }
  })
  return { steps, currentStep: integer(plan.currentStep ?? 0, 0, Math.max(0, steps.length - 1)) }
}