'use strict';

const _ = require('lodash');
const matchesStringOrRegExp = require('../../utils/matchesStringOrRegExp');
const postcss = require('postcss');
const report = require('../../utils/report');
const ruleMessages = require('../../utils/ruleMessages');
const validateOptions = require('../../utils/validateOptions');

const ruleName = 'declaration-property-value-whitelist';

const messages = ruleMessages(ruleName, {
	rejected: (property, value) => `Unexpected value "${value}" for property "${property}"`,
});

function rule(whitelist) {
	return (root, result) => {
		const validOptions = validateOptions(result, ruleName, {
			actual: whitelist,
			possible: [_.isObject],
		});

		if (!validOptions) {
			return;
		}

		root.walkDecls((decl) => {
			const prop = decl.prop;
			const value = decl.value;

			const unprefixedProp = postcss.vendor.unprefixed(prop);
			const propWhitelist = _.find(whitelist, (list, propIdentifier) =>
				matchesStringOrRegExp(unprefixedProp, propIdentifier),
			);

			if (_.isEmpty(propWhitelist)) {
				return;
			}

			if (matchesStringOrRegExp(value, propWhitelist)) {
				return;
			}

			report({
				message: messages.rejected(prop, value),
				node: decl,
				result,
				ruleName,
			});
		});
	};
}

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