var fs                = require('fs');
var mkdirp            = require('mkdirp');
var path              = require('path');
var RawSource         = require("webpack-sources/lib/RawSource");
const { sources }     = require('webpack');
const { Compilation } = require('webpack');

function SpritemapReplacePath (options) {
  this.options = {
    assetsConstants:          false,
    assetPrefix:              '~',
    manifestFilename:         'manifest.json',
    debug:                    false,
    chunkFilenameReplacement: [],
  }
  options && Object.assign(this.options, options);
}

SpritemapReplacePath.prototype.apply = function (compiler) {
  var self = this;
  let pluginName = 'SpritemapReplacePath';
  let manifest = null;
  let spritemapFilename = null;
  compiler.hooks.compilation.tap(pluginName, (compilation) => {
    compilation.hooks.processAssets.tap(
      {
        name: pluginName,
        stage: Compilation.PROCESS_ASSETS_STAGE_SUMMARIZE,
        additionalAssets: false,
      },
      (assets) => {
        let manifestAsset = compilation.getAsset('manifest.json');
        if (manifestAsset) {
          manifest = JSON.parse(manifestAsset.source.source());
          spritemapFilename = manifest['spritemap.svg'];
        }
        for (let i in assets) {
          if (!spritemapFilename) {
            continue;
          }
          const asset = compilation.getAsset(i);
          const contents = asset.source.source();
          let updatedSrc = contents;
          updatedSrc = contents.replace(
            new RegExp('#spritemap\.svg#', 'g'),
            '/static' + spritemapFilename + '#'
          );
          compilation.updateAsset(
            i,
            new RawSource(updatedSrc),
          );
        }
      }
    );
  });
};

module.exports = SpritemapReplacePath;