"use strict"

const isAutoprefixable = require("../../utils/isAutoprefixable")
const isStandardSyntaxAtRule = require("../../utils/isStandardSyntaxAtRule")
const report = require("../../utils/report")
const ruleMessages = require("../../utils/ruleMessages")
const validateOptions = require("../../utils/validateOptions")

const ruleName = "at-rule-no-vendor-prefix"

const messages = ruleMessages(ruleName, {
  rejected: p => `Unexpected vendor-prefixed at-rule "@${p}"`,
})

const rule = function (actual) {
  return function (root, result) {
    const validOptions = validateOptions(result, ruleName, { actual })
    if (!validOptions) {
      return
    }

    root.walkAtRules(atRule => {
      if (!isStandardSyntaxAtRule(atRule)) {
        return
      }

      const name = atRule.name

      if (name[0] !== "-") {
        return
      }

      if (!isAutoprefixable.atRuleName(name)) {
        return
      }

      report({
        message: messages.rejected(name),
        node: atRule,
        result,
        ruleName,
      })
    })
  }
}

rule.ruleName = ruleName
rule.messages = messages
module.exports = rule
