/*
 This file is part of GNU Taler
 (C) 2021 Taler Systems S.A.

 GNU Taler is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software
 Foundation; either version 3, or (at your option) any later version.

 GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

/**
 *
 * @author Sebastian Javier Marchano (sebasjm)
 */

import mustache from "mustache";
import fs from "fs";
import { format, formatDuration, intervalToDuration } from "date-fns";

/**
 * This script will emulate what the merchant backend will do when being requested
 *
 */

const sourceDirectory = process.argv[2];
const destDirectory = process.argv[3];

if (!sourceDirectory || !destDirectory) {
  console.log("usage: render-mustache <source-directory> <dest-directory>");
  process.exit(1);
}

if (!fs.existsSync(destDirectory)) {
  fs.mkdirSync(destDirectory);
}

function fromCamelCaseName(name) {
  const result = name
    .replace(/^[a-z]/, (letter) => `${letter.toUpperCase()}`) //first letter lowercase
    .replace(/_[a-z]/g, (letter) => `${letter[1].toUpperCase()}`); //snake case
  return result;
}
/**
 * Load all the html files
 */
const files = fs.readdirSync(sourceDirectory).filter((f) => /.html/.test(f));

files.forEach((file) => {
  const html = fs.readFileSync(`${sourceDirectory}/${file}`, "utf8");

  const testName = file.replace(".en.html", "");
  const exampleFileName = `./src/pages/${fromCamelCaseName(testName)}.examples`;
  if (!fs.existsSync(exampleFileName + ".ts")) {
    console.log(`skipping ${testName}: no examples found`);
    return;
  }
  // eslint-disable-next-line @typescript-eslint/no-var-requires
  const { exampleData } = require(exampleFileName);

  Object.keys(exampleData).forEach((exampleName) => {
    const example = exampleData[exampleName];

    //enhance the example with more information
    example.contract_terms_json = () => JSON.stringify(example.contract_terms);
    example.contract_terms.timestamp_str = () =>
      example.contract_terms.timestamp &&
      format(example.contract_terms.timestamp.t_s, "dd MMM yyyy HH:mm:ss");

    example.contract_terms.hasProducts = () =>
      example.contract_terms.products?.length > 0;
    example.contract_terms.hasAuditors = () =>
      example.contract_terms.auditors?.length > 0;
    example.contract_terms.hasExchanges = () =>
      example.contract_terms.exchanges?.length > 0;

    example.contract_terms.products.forEach((p) => {
      p.delivery_date_str = () =>
        p.delivery_date && format(p.delivery_date.t_s, "dd MM yyyy HH:mm:ss");
      p.hasTaxes = () => p.taxes?.length > 0;
    });
    example.contract_terms.has_delivery_info = () =>
      example.contract_terms.delivery_date ||
      example.contract_terms.delivery_location;

    example.contract_terms.delivery_date_str = () =>
      example.contract_terms.delivery_date &&
      format(example.contract_terms.delivery_date.t_s, "dd MM yyyy HH:mm:ss");
    example.contract_terms.pay_deadline_str = () =>
      example.contract_terms.pay_deadline &&
      format(example.contract_terms.pay_deadline.t_s, "dd MM yyyy HH:mm:ss");
    example.contract_terms.wire_transfer_deadline_str = () =>
      example.contract_terms.wire_transfer_deadline &&
      format(
        example.contract_terms.wire_transfer_deadline.t_s,
        "dd MM yyyy HH:mm:ss",
      );
    example.contract_terms.refund_deadline_str = () =>
      example.contract_terms.refund_deadline &&
      format(example.contract_terms.refund_deadline.t_s, "dd MM yyyy HH:mm:ss");
    example.contract_terms.auto_refund_str = () =>
      example.contract_terms.auto_refund &&
      formatDuration(
        intervalToDuration({
          start: 0,
          end: example.contract_terms.auto_refund.d_us,
        }),
      );

    const output = mustache.render(html, example);

    fs.writeFileSync(
      `${destDirectory}/${testName}.${exampleName}.html`,
      output,
    );
  });
});