const typescriptTransform = require('i18next-scanner-typescript');

const fs = require('fs');
const chalk = require('chalk');

module.exports = {
  input: [
    'client/src/**/*.{tsx,ts}',
    // Use ! to filter out files or directories
    '!client/i18n/**',
    '!**/node_modules/**',
  ],
  output: './client/public/locales',
  options: {
    debug: true,
    func: {
      list: ['i18next.t', 'i18n.t', 't'],
      extensions: ['.js', '.jsx'] // not .ts or .tsx since we use i18next-scanner-typescript!
    },
    trans: {
      component: 'Trans',
      i18nKey: 'i18nKey',
      defaultsKey: 'defaults',
      extensions: ['.js', '.jsx'], // not .ts or .tsx since we use i18next-scanner-typescript!
      fallbackKey: (ns, value) => {return value},

      // https://react.i18next.com/latest/trans-component#usage-with-simple-html-elements-like-less-than-br-greater-than-and-others-v10.4.0
      supportBasicHtmlNodes: true, // Enables keeping the name of simple nodes (e.g. <br/>) in translations instead of indexed keys.
      keepBasicHtmlNodesFor: ['br', 'strong', 'i', 'p'], // Which nodes are allowed to be kept in translations during defaultValue generation of <Trans>.

      // // https://github.com/acornjs/acorn/tree/master/acorn#interface
      // acorn: {
      //     ecmaVersion: 2020,
      //     sourceType: 'module', // defaults to 'module'
      // }
    },
    lngs: ['en','de'],
    ns: [],
    defaultLng: 'en-GB',
    defaultNs: 'translation',
    defaultValue: (lng, ns, key) => {
      if (lng === 'en') {
        return key; // Use key as value for base language
      }
      return ''; // Return empty string for other languages
    },
    resource: {
      loadPath: './{{lng}}/{{ns}}.json',
      savePath: './{{lng}}/{{ns}}.json',
      jsonIndent: 2,
      lineEnding: '\n'
    },
    nsSeparator: false, // namespace separator
    keySeparator: false, // key separator
    plurals: false,
    interpolation: {
      prefix: '{{',
      suffix: '}}'
    },
    metadata: {},
    allowDynamicKeys: false,
  },

  transform: typescriptTransform(
    // options
    {
      // default value for extensions
      extensions: [".ts", ".tsx"],
      // optional ts configuration
      tsOptions: {
        target: "es2017",
      },
    },

    function(outputText, file, enc, done) {
      'use strict';
      const parser = this.parser;

      let count = 0;

      parser.parseTransFromString(outputText);
      parser.parseFuncFromString(outputText);

        if (count > 0) {
          console.log(`[i18next-scanner] transform: count=${chalk.cyan(count)}, file=${chalk.yellow(JSON.stringify(file.relative))}`);
        }

      done();
    }
  ),

};