"use strict"

const _ = require("lodash")
const isCustomProperty = require("../../utils/isCustomProperty")
const report = require("../../utils/report")
const ruleMessages = require("../../utils/ruleMessages")
const validateOptions = require("../../utils/validateOptions")

const ruleName = "custom-property-pattern"

const messages = ruleMessages(ruleName, {
  expected: "Expected custom property name to match specified pattern",
})

const rule = function (pattern) {
  return (root, result) => {
    const validOptions = validateOptions(result, ruleName, {
      actual: pattern,
      possible: [
        _.isRegExp,
        _.isString,
      ],
    })
    if (!validOptions) {
      return
    }

    const regexpPattern = _.isString(pattern) ? new RegExp(pattern) : pattern

    root.walkDecls(decl => {
      const prop = decl.prop

      if (!isCustomProperty(prop)) {
        return
      }
      if (regexpPattern.test(prop.slice(2))) {
        return
      }

      report({
        message: messages.expected,
        node: decl,
        result,
        ruleName,
      })
    })
  }
}

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