"use strict"

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

const ruleName = "property-case"

const messages = ruleMessages(ruleName, {
  expected: (actual, expected) => `Expected "${actual}" to be "${expected}"`,
})

const rule = function (expectation) {
  return (root, result) => {
    const validOptions = validateOptions(result, ruleName, {
      actual: expectation,
      possible: [
        "lower",
        "upper",
      ],
    })
    if (!validOptions) {
      return
    }

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

      if (!isStandardSyntaxProperty(prop)) {
        return
      }
      if (isCustomProperty(prop)) {
        return
      }

      const expectedProp = expectation === "lower" ? prop.toLowerCase() : prop.toUpperCase()
      if (prop === expectedProp) {
        return
      }

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

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