/** 语句：for 循环（解析在此，执行在 sequence-runner） */
const { assertStrictKeys } = require('../action-schema.js')
const types = ['for']

function parse (action, parseContext) {
  const path = parseContext.actionPath || 'for'
  assertStrictKeys(action, ['type', 'variable', 'indexVariable', 'times', 'array', 'body'], path)
  if (!Array.isArray(action.body)) {
    throw new Error(`${path}: for 须包含数组 body`)
  }
  const hasTimes = action.times != null && action.times !== ''
  const hasArray = action.array != null && action.array !== ''
  if (hasTimes === hasArray) {
    throw new Error(`${path}: for 须二选一：填写 times+variable，或填写 array+indexVariable+variable`)
  }
  if (hasTimes && (action.variable === undefined || action.variable === null || action.variable === '')) {
    throw new Error(`${path}: for 使用 times 时须提供 variable`)
  }
  if (hasArray) {
    if (!action.indexVariable) {
      throw new Error(`${path}: for 使用 array 时须提供 indexVariable`)
    }
  }
  return {
    type: 'for',
    variable: action.variable,
    indexVariable: action.indexVariable,
    times: hasTimes ? action.times : null,
    array: hasArray ? action.array : null,
    body: parseContext.parseActions(action.body, 'body'),
  }
}

async function execute() {
  return { success: true }
}

module.exports = { types, parse, execute }