"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

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

var _utils = require("../utils");

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

const isUrlFunc = /url/i;
const isImageSetFunc = /^(?:-webkit-)?image-set$/i;
const needParseDeclaration = /(?:url|(?:-webkit-)?image-set)\(/i;

function getNodeFromUrlFunc(node) {
  return node.nodes && node.nodes[0];
}

function shouldHandleRule(rule, node, result) {
  // https://www.w3.org/TR/css-syntax-3/#typedef-url-token
  if (rule.url.replace(/^[\s]+|[\s]+$/g, '').length === 0) {
    result.warn(`Unable to find uri in '${node.toString()}'`, {
      node
    });
    return false;
  }

  if (!(0, _utils.isUrlRequestable)(rule.url)) {
    return false;
  }

  return true;
}

function visitor(result, parsedResults, node, key) {
  if (!needParseDeclaration.test(node[key])) {
    return;
  }

  const parsed = (0, _postcssValueParser.default)(node[key]);
  parsed.walk(valueNode => {
    if (valueNode.type !== 'function') {
      return;
    }

    if (isUrlFunc.test(valueNode.value)) {
      const {
        nodes
      } = valueNode;
      const isStringValue = nodes.length !== 0 && nodes[0].type === 'string';
      const url = isStringValue ? nodes[0].value : _postcssValueParser.default.stringify(nodes);
      const rule = {
        node: getNodeFromUrlFunc(valueNode),
        url,
        needQuotes: false,
        isStringValue
      };

      if (shouldHandleRule(rule, node, result)) {
        parsedResults.push({
          node,
          rule,
          parsed
        });
      } // Do not traverse inside `url`
      // eslint-disable-next-line consistent-return


      return false;
    } else if (isImageSetFunc.test(valueNode.value)) {
      for (const nNode of valueNode.nodes) {
        const {
          type,
          value
        } = nNode;

        if (type === 'function' && isUrlFunc.test(value)) {
          const {
            nodes
          } = nNode;
          const isStringValue = nodes.length !== 0 && nodes[0].type === 'string';
          const url = isStringValue ? nodes[0].value : _postcssValueParser.default.stringify(nodes);
          const rule = {
            node: getNodeFromUrlFunc(nNode),
            url,
            needQuotes: false,
            isStringValue
          };

          if (shouldHandleRule(rule, node, result)) {
            parsedResults.push({
              node,
              rule,
              parsed
            });
          }
        } else if (type === 'string') {
          const rule = {
            node: nNode,
            url: value,
            needQuotes: true,
            isStringValue: true
          };

          if (shouldHandleRule(rule, node, result)) {
            parsedResults.push({
              node,
              rule,
              parsed
            });
          }
        }
      } // Do not traverse inside `image-set`
      // eslint-disable-next-line consistent-return


      return false;
    }
  });
}

const plugin = (options = {}) => {
  return {
    postcssPlugin: 'postcss-url-parser',

    prepare(result) {
      const parsedResults = [];
      return {
        Declaration(declaration) {
          visitor(result, parsedResults, declaration, 'value');
        },

        async OnceExit() {
          if (parsedResults.length === 0) {
            return;
          }

          const tasks = [];
          const imports = new Map();
          const replacements = new Map();
          let hasUrlImportHelper = false;

          for (const parsedResult of parsedResults) {
            const {
              url,
              isStringValue
            } = parsedResult.rule;
            let normalizedUrl = url;
            let prefix = '';
            const queryParts = normalizedUrl.split('!');

            if (queryParts.length > 1) {
              normalizedUrl = queryParts.pop();
              prefix = queryParts.join('!');
            }

            normalizedUrl = (0, _utils.normalizeUrl)(normalizedUrl, isStringValue);

            if (!options.filter(normalizedUrl)) {
              // eslint-disable-next-line no-continue
              continue;
            }

            if (!hasUrlImportHelper) {
              options.imports.push({
                importName: '___CSS_LOADER_GET_URL_IMPORT___',
                url: options.urlHandler(require.resolve('../runtime/getUrl.js')),
                index: -1
              });
              hasUrlImportHelper = true;
            }

            const splittedUrl = normalizedUrl.split(/(\?)?#/);
            const [pathname, query, hashOrQuery] = splittedUrl;
            let hash = query ? '?' : '';
            hash += hashOrQuery ? `#${hashOrQuery}` : '';
            const request = (0, _utils.requestify)(pathname, options.rootContext);
            tasks.push((async () => {
              const {
                resolver,
                context
              } = options;
              const resolvedUrl = await (0, _utils.resolveRequests)(resolver, context, [...new Set([request, normalizedUrl])]);
              return {
                url: resolvedUrl,
                prefix,
                hash,
                parsedResult
              };
            })());
          }

          const results = await Promise.all(tasks);

          for (let index = 0; index <= results.length - 1; index++) {
            const {
              url,
              prefix,
              hash,
              parsedResult: {
                node,
                rule,
                parsed
              }
            } = results[index];
            const newUrl = prefix ? `${prefix}!${url}` : url;
            const importKey = newUrl;
            let importName = imports.get(importKey);

            if (!importName) {
              importName = `___CSS_LOADER_URL_IMPORT_${imports.size}___`;
              imports.set(importKey, importName);
              options.imports.push({
                importName,
                url: options.urlHandler(newUrl),
                index
              });
            }

            const {
              needQuotes
            } = rule;
            const replacementKey = JSON.stringify({
              newUrl,
              hash,
              needQuotes
            });
            let replacementName = replacements.get(replacementKey);

            if (!replacementName) {
              replacementName = `___CSS_LOADER_URL_REPLACEMENT_${replacements.size}___`;
              replacements.set(replacementKey, replacementName);
              options.replacements.push({
                replacementName,
                importName,
                hash,
                needQuotes
              });
            } // eslint-disable-next-line no-param-reassign


            rule.node.type = 'word'; // eslint-disable-next-line no-param-reassign

            rule.node.value = replacementName; // eslint-disable-next-line no-param-reassign

            node.value = parsed.toString();
          }
        }

      };
    }

  };
};

plugin.postcss = true;
var _default = plugin;
exports.default = _default;