/** 语句：delay 延迟（仅 value；单位 ms/s/m/h/d/w/mon/月/y，可组合，纯数字按秒） */
const { assertStrictKeys } = require('../action-schema.js')
const types = ['delay']

function parse (action, parseContext) {
  const path = parseContext.actionPath || 'delay'
  assertStrictKeys(action, ['type', 'value'], path)
  if (action.value === undefined || action.value === null || String(action.value).trim() === '') {
    throw new Error(`${path}: delay 须使用字段 value 指定时长`)
  }
  return { type: 'delay', value: action.value }
}

async function execute(action, ctx) {
  const raw = action.value != null ? action.value : '0s'
  const resolved = ctx.replaceVariablesInString && ctx.variableContext
    ? ctx.replaceVariablesInString(String(raw), ctx.variableContext)
    : raw
  const delayMs = ctx.parseDelayString ? ctx.parseDelayString(resolved) : 0
  const waitMs = typeof delayMs === 'number' && delayMs > 0 ? delayMs : 0
  if (waitMs > 0) await new Promise(r => setTimeout(r, waitMs))
  return { success: true }
}

module.exports = { types, parse, execute }