/** 语句：log 打印信息（仅 console/UI，不写 log.txt） */
const types = ['log']

function parse(action, parseContext) {
  const { extractVarName } = parseContext
  const parsed = { type: 'log' }
  if (action.inVars && Array.isArray(action.inVars)) {
    parsed.inVars = action.inVars.map(v => extractVarName(v))
  } else parsed.inVars = []
  if (action.value) parsed.value = action.value
  return Object.assign({}, action, parsed)
}

async function execute(action, ctx) {
  const { variableContext, extractVarName, replaceVariablesInString } = ctx
  let message = ''
  if (action.inVars && action.inVars.length > 0) {
    const messages = action.inVars.map(varWithBraces => {
      const varName = extractVarName(varWithBraces)
      const v = variableContext[varName]
      return v !== undefined ? String(v) : varWithBraces
    })
    message = messages.join(' ')
  } else if (action.value) {
    message = replaceVariablesInString(action.value, variableContext)
  }
  if (typeof console !== 'undefined') console.log(message)
  if (typeof window !== 'undefined') {
    window.dispatchEvent(new CustomEvent('log-message', { detail: { message } }))
  }
  return { success: true }
}

module.exports = { types, parse, execute }