"use strict";

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _postcss = require("postcss");

var _postcssValueParser = require("postcss-value-parser");

var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const atrule = "atrule";
const decl = "decl";
const rule = "rule";

function reduceCalcWhitespaces(node) {
    if (node.type === "space") {
        node.value = " ";
    } else if (node.type === "function") {
        node.before = node.after = "";
    }
}

function reduceWhitespaces(node) {
    if (node.type === "space") {
        node.value = " ";
    } else if (node.type === "div") {
        node.before = node.after = "";
    } else if (node.type === "function") {
        node.before = node.after = "";

        if (node.value.toLowerCase() === "calc") {
            _postcssValueParser2.default.walk(node.nodes, reduceCalcWhitespaces);
            return false;
        }
    }
}

exports.default = (0, _postcss.plugin)("postcss-normalize-whitespace", () => {
    return css => {
        const cache = {};

        css.walk(node => {
            const { type } = node;

            if (~[decl, rule, atrule].indexOf(type) && node.raws.before) {
                node.raws.before = node.raws.before.replace(/\s/g, "");
            }

            if (type === decl) {
                // Ensure that !important values do not have any excess whitespace
                if (node.important) {
                    // fixed by xxxxxx 头条小程序 rpx!important 中间必须有空格,否则无法正确转换
                    node.raws.important = " !important";
                }

                // Remove whitespaces around ie 9 hack
                node.value = node.value.replace(/\s*(\\9)\s*/, "$1");

                const value = node.value;

                if (cache[value]) {
                    node.value = cache[value];
                } else {
                    const parsed = (0, _postcssValueParser2.default)(node.value);
                    const result = parsed.walk(reduceWhitespaces).toString();

                    // Trim whitespace inside functions & dividers
                    node.value = result;
                    cache[value] = result;
                }

                // Remove extra semicolons and whitespace before the declaration
                if (node.raws.before) {
                    const prev = node.prev();

                    if (prev && prev.type !== rule) {
                        node.raws.before = node.raws.before.replace(/;/g, "");
                    }
                }

                node.raws.between = ":";
                node.raws.semicolon = false;
            } else if (type === rule || type === atrule) {
                node.raws.between = node.raws.after = "";
                node.raws.semicolon = false;
            }
        });

        // Remove final newline
        css.raws.after = "";
    };
});
module.exports = exports["default"];